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Therm-O-Mix® Tepid Water Delivery System

Operation – How Tepid Water Systems for Safety Showers and Eyewash Stations Operates

The Therm-O-Mix® tepid water system is designed to deliver tepid water to one shower/eyewash combo at a time. This water heating system should be installed near the shower and piped into a facility’s steam and cold water supply lines.

When an emergency shower or eyewash station is activated, the pressure drop on a diaphragm opens the steam control valve (V-3). Water and steam flow are established, instantly heating and condensing the steam. After exiting the heat exchanger, the hot water enters the tempering valve (V-5) and then the mixing valve (V-1), where it is blended with cold water to produce an outlet of 80°F water. The steam valve remains closed should the water supply be interrupted.

Typical Applications

In various industrial and commercial settings, particularly those where dangerous substances are present, OSHA and ANSI mandate the use of tepid water systems for safety showers and eyewash stations. Per their guidelines, all emergency fixtures must provide tepid water for a minimum & continuous 15-minute cycle. Tepid is defined to be between 60°F (16°C) and 100°F (38°C). The Therm-O-Mix® Tepid Water Delivery System can ensure your emergency equipment meets these code requirements by providing 80°F water to protect personnel from scalding or freezing temperatures. Since the station requires no electric power, it is suitable for explosion-proof environments and outdoor installations.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • Plant steam and water never mix – uses a compact heat exchanger
  • Standard pressure unit available for 45-60 PSIG steam pressure
  • Low-pressure unit available for 15-30 PSIG steam pressure
  • Durable enclosure can be readily removed for service
  • Conforms to OSHA and ANSI recommendations
  • Designed to meet ASSE 1071 requirements
  • Steam trap on steam inlet included

Benefits

  • Self-operating – no external power source required
  • Uses existing plant steam and water supply
  • Provides 3 to 25 GPM of 80°F
  • Easy to retrofit on existing shower or combination face/eyewash stations
  • Maintains constant 80°F output regardless of inlet water temperature
    (between 40°F and 80°F)
  • No insulated tanks or expensive recirculation systems are required
  • Self-purging-no need for elaborate drainage system
  • Union connections allow quick and easy installation

Ordering

PART NUMBER

DESCRIPTION

387-112100-003

THERM-O-MIX® STATION, BPHE
(45-60 PSIG STEAM)

387-512100-003

THERM-O-MIX® STATION LSP, BPHE
(15-30 PSIG STEAM)

Therm-O-Mix® Station WWM | Tepid Water Mixing Valve

Operation

After water flow is activated at the shower or eyewash, the outlet water temperature will reach 85°F (29°C) when hot water arrives at the mixing valve. The tepid water mixing valve then blends the hot and cold water to produce an output of 85°F (29°C) water from 3 GPM (11.4 L/min) to 25 GPM (113.7 L/min) with a water inlet pressure of at least 40 PSIG (2.8 BAR).

At 50 GPM (189.3 L/min) pressure drop is 25 PSIG (1.7 BAR) therefore with a water inlet pressure of at least 60 PSIG (4.1 BAR) this unit is capable of enough flow for two combinations shower/eyewash stations running simultaneously.

Typical Applications

OSHA and ANSI require all your emergency fixtures to provide tepid water for a minimum & continuous 15-minute cycle. Tepid is defined to be between 60°F (16°C) and 100°F (38°C). The Therm-O-Mix® WWM Tepid Delivery System can ensure your emergency equipment will meet these codes. Since the station does not require any electric power, it is suitable for explosion-proof environments and outdoor installations.

The Therm-O-Mix WWM tepid water mixing valve is typically used in facilities with only hot and cold water supply to provide tepid water delivery to safety shower and face/eyewash stations.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • Conforms to OSHA and ANSI recommendations
  • This unit is capable of enough flow for two combination shower/eyewash stations to run simultaneously
  • Compact, lightweight design easily supported by piping connections

Benefits

  • Self-operating – no external power source required
  • All components are in-line serviceable
  • Easy to retrofit on existing shower or combination shower/eyewash stations
  • Maintains constant 85°F (29°C) output
  • Utilizes existing hot and cold water supply
  • Optional durable, all-weather version in high visibility LDPE enclosure available

Ordering

PART NUMBER

DESCRIPTION

387 - 201000 - 000

THERM-O-MIX® STATION/WWM-85°F

ESS Emergency Shower Water Heater

 

The ESS water heater is packaged with the Therm-O-Mix®/WWM which is specifically designed, tested, and proven in emergency safety shower/face/eyewash applications. When you specify and install a ThermOmegaTech® tempered water system, you can be confident that it will be a safe and dependable source of tepid water for an emergency drench system.

Operation – How the Safety Shower Tempered Water System Operates

Packaged with the ESS is a triple-redundant thermostatic valve explicitly designed for emergency safety shower/face/eyewash applications. The Therm-O-Mix®/WWM is factory mounted and piped to the water heater. After the water flow is activated at the emergency station, the outlet water temperature from the ESS will be maintained at 85°F tepid temperature.

The ESS Emergency Shower Water Heater can achieve the high-volume demand required for a safety drench system by mixing the 170°F water in the tank with incoming cold water. The mixing valve of our tempered water system meets OSHA and ANSI requirements and can provide a constant 85°F output regardless of inlet pressure and temperature variations. The temperature is factory set, making the valve tamper-proof.

The water temperature is not warm enough to open skin pores and not cold enough to deter usage. The valve can provide a full range of flows from 0.4 GPM for an eyewash to the combined 23 GPM flow for a simultaneous demand for a shower, eyewash, and face wash system.

For two-shower operation, the minimum water pressure needs to be 60 PSIG to satisfy ANSI Z358.1 pressure spec of 30 PSIG at the shower head. If longer than 20ft runs from the heater to shower station are needed, the water pressure needs to be 68 PSIG for up to 50ft and 81 PSIG for up to 100ft.

Safety Features

The Therm-O-Mix®/WWM incorporates a pressure-sensing controller with a thermal actuator that senses the water pressure on the hot and cold water inlet connections. If the hot water pressure is absent, the actuator overrides the mixing valve, allowing cold water flow. If no cold-water pressure is available at the mixing valve inlet, the hot water port will close to prevent overheated water from exiting the mixing valve.

The valve also includes a safety override feature that continuously senses the final mixed water temperature. If the final water temperature is overheated, the valve automatically closes the hot water port and fully opens the cold water port. In any of these fault conditions, the ESS will continue providing a full flow of water per the ANSI standard with no additional pressure drop.

Typical Applications

The ESS emergency shower water heater packaged with the WWM water/water mixing valve is used for emergency safety shower and face/eyewash stations in manufacturing, food production, chemical, pharmaceutical, petrochemical, and other facilities where personnel can be exposed to hazardous or corrosive materials.

ThermOmegaTech® offers a range of tepid water systems for safety showers to meet your needs. From our steam and water mixing Therm-O-Mix® Station, hot and cold water mixing Therm-O-Mix®/WWM valve, or our ESS tepid water heater, your employees will always have access to safe, reliable, and comfortable showers when they need them most. Contact us to make our safety shower tempered water system part of your workspace or facility.

Design Features

  • Factory packaged with the Therm-O-Mix Station®/WWM
  • All electrical operating controls are factory selected and wired to ensure reliable operation
  • ½” Hydrastone cement lining provides tank longevity
  • Fully insulated with 3″ thick polyurethane foam to minimize standby heat loss
  • Copper-silicon alloy tapings cannot rust or corrode
  • High impact composite jacket cannot rust or corrode and eliminate potential damage during installation and transit

Benefits

  • Compliant with OSHA and ANSI tepid water standards
  • Self-operating mixing valve prohibits the delivery of overheated water to prevent scalding
  • Mixing valve designed to ensure a constant flow of tepid water even when an accident causes a loss of electric power
  • Reduces risk of Legionella because water is stored at an elevated temperature
  • Component’s factory assembled simplifies installation
  • 5-year non-pro-rated tank warranty

Ordering

ESS Emergency Safety Shower Water Heater Part Number Ordering Chart

Example: 389-003000-000 – The ESS Water Heater emergency tepid water delivery system with a storage capacity of 119 Gallons, 85°F set point of the mixing valve, and a 4.5 KW rating. The storage tank is lined with Hydrastone cement and operates at 240 Volts single-phase power.

HST High Sample Temperature Shutoff Valve

Operation

The HST (High Sample Temperature) automatic thermal shutoff valve senses the sample temperature after the sample cooler. Under normal conditions, the valve is wide open, so the sample fluid passes through the valve. The valve’s internal thermal actuator is always sensing the fluid temperature. If the temperature exceeds the valve’s set point, the HST will close to protect expensive and delicate analyzers and other instruments downstream from over-temperature damage.

The HST will only open again once the sample temperature falls back below the valve’s set-point. Low coolant flow, total loss of cooling water, or unusually high sample temperatures are typical reasons the HST self-operating protective device should be considered for your high-water temperature shutoff system.

Typical Applications

Excessively hot samples can cause damage to expensive and sensitive hardware and electronics. For process analyzers and similar instrumentation, it is crucial to ensure that the process sample fluids are consistently below the maximum allowable temperature for such instruments.

Sample coolers are commonly used to reduce sample temperatures to acceptable limits. In the event of a loss of cooling fluid to the sample cooler or if the desired sample temperature is exceeded, the HST thermal shutoff valve will close to prevent equipment damage.

HST - Thermal Shutoff Valve

Design Features

  • Exclusive self-actuating Thermoloid® blend wax thermal actuator
  • Ram-type plug provides tight shutoff
  • Operating temperatures unaffected by variable inlet pressures
  • Wide choice of temperature set-points available
  • Corrosion-resistant – all stainless-steel construction

Benefits

  • Self-operating – no external power source required
  • Automatically controls flow based on fluid temperature
  • Protects expensive and delicate sample analyzers
  • Automatically resets when the sample cools
  • Superior value vs. more expensive electric valves
  • Easy installation

Ordering

PART NUMBER

DESCRIPTION

254-000000-XXX

1/2” HST (EPDM Seals)

254-001000-XXX

1/2” HST (Viton® Seals)

254-002000-XXX

1/2” HST (Kalrez® Seals)

254-11X000-XXX

1/2” HST-XXX-S6-X

TV/SC-A Ambient Sensing Steam Tracing Control Valve

Operation

The TV/SC-A (Tube Valve/Steam Control-Ambient Sensing) is a Steam Tracing Control Valve that can be used to turn on steam, air, gas, or liquids compatible with Teflon® and stainless steel in response to ambient temperature changes to protect piping and instrumentation from freeze damage.

The thermostatic actuator located at one end of the TV/SC-A (thermally isolated from the body of the valve), will automatically open or close within a 10°F (5.6°C) differential (e.g. 35°- 45°F) to provide an optimal fluid temperature. The steam tracing control valve is normally closed and will begin to open to inject steam or another fluid when the ambient temperature drops below the valves’ set-point. The valves will close again once the air temperature rises back above the valves’ set-point, saving thousands of dollars in wasted operating costs.

Typical Applications

TVSC-A steam tracing control valve

There are hundreds of applications for this compact, self-contained, automatic steam tracing control valve.

Most often used in steam tracing applications, these self-actuating valves can also be used in the operation of pneumatically operated pumps for injection of anti-freeze liquids and instrument enclosure temperature control (See ITCH product sheet).

Design Features

  • Exclusive self-actuating Thermoloid® blend wax thermal actuator
  • Stainless-steel body, fittings, and plugs
  • Compact, low mass – fast response
  • Corrosion-resistant – long service life
  • Ram-type plug for tight reliable shutoff
  • Wide choice of set-points available
  • Large flow coefficient (Cv)

Benefits

  • Self-operating – no external power source required
  • Economically controls fluid flow
  • Reduces operating and labor costs associated with winterization procedures
  • Eliminates steam waste in tracing
  • Standard tube connections for quick and easy installation
  • Unaffected by pressure variations

Ordering

PART NUMBER1,2

DESCRIPTION

713 - 0X1000 - XXX

3/8” TV/SC-A

714 - 0X1000 - XXX

1/2” TV/SC-A

US/S-X Steam Tracing Control Valve

Operation

The thermostatic actuator located at the one end of the US/S-X (Ultra Surface Sensing) temperature control valve may be installed immersed in the process fluid or mounted non-invasively to the pipeline with the optional band-o-let fitting. This ultra sense control valve allows the wax actuator to be in contact with the process directly or through thermal conduction to sense the temperature and regulate the inflow of heating media. Input temperatures or steam supply can vary widely, but the control temperature is maintained within desired limits.

The thermal actuator automatically and continuously monitors the temperature and will modulate open and closed to keep the process fluid heated at a specified temperature within a 10°F differential. For example, a 90°F valve would open at 90°F and close at 100°F, keeping the process fluid between 90 – 100°F.

Typical Applications

The compact self-operating ultra sense control valve can maintain very tight temperature control of any number of control loops using steam, liquid phase heat transfer media such as Dowtherm®, hot water, hot oil, glycol, etc. In general, they can be used whenever accurate, low cost control is required.

The reverse-acting model, US/S-XR can be used to control cooling media to economically remove heat from equipment or a process.

Installed to Pipeline

US/SX Ultra Sense Control Valve

Installed in Process

US/SX

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • All stainless-steel construction
  • Narrow temperature band
  • Compact low mass – fast response
  • Ram-type plug for reliable shut off
  • Unaffected by pressure variations

Benefits

  • Self-operating – no external power source required
  • Maintains optimal process temperature
  • Prevents process overheating
  • Discharges minimum amount of media for temperature control
  • Quick and easy installation
  • Long service life

Ordering

PART NUMBER1

DESCRIPTION

654 - 000000 - XXX

1/2” US/S-X-S

654 - 010000 - XXX

1/2” US/S-X-S-BAND2

655 - 000000 - XXX

3/4” US/S-X-S

655 - 010000 - XXX

3/4” US/S-X-S-BAND2

TV/US-X Steam Tracing Control Valve (with Tube Fittings)

Operation

The self-actuating, thermostatic TV/US-X (Tube Fitting/Ultra Surface Sensing) sample cooler control valve operates the same as the US/S-X valve where the sensing end is either immersed in the process fluid or mounted non-invasively via a hose clamp on the outside of the pipeline. The two differences are that the heating media is connected with tube compression fittings instead of pipe fittings and the Cv is around half of the US/S-X valve.

When immersed in the process fluid, the thermal actuator in the valve automatically senses when the temperature rises above the valve’s set-point and modulates closed to keep the process fluid heated at a specified temperature within a 10°F differential. For example, a 90°F valve would open at 90°F and close at 100°F, always keeping the process fluid between 90 – 100°F.

Typical Applications

TVUSX - Sample cooler control

These self-contained and compact thermostatic sample cooler control valves can maintain very tight temperature control of any number of control loops using steam, liquid phase heat transfer media such as Dowtherm®, hot water, hot oil, glycol, compressed air, etc. Sample heating applications are commonly controlled by the TV/US-X, but they can be used whenever accurate, low cost control is required.

The reverse-acting model, TV/US-XR (Tube Fitting/Ultra Surface Sensing) can be used to regulate flow to protect a system or process from overheating by operating on rising temperatures to allow cooling fluid in.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • All stainless-steel construction
  • Compact low mass – fast response
  • Ram-type plug for reliable shut off
  • Narrow temperature band
  • Unaffected by pressure variations

Benefits

  • Self-operating – no external power source required
  • Prevents process overheating
  • Discharges minimum amount of media for temperature control
  • Maintains optimal process temperature
  • Quick and easy installation
  • Long service life

Ordering

PART NUMBER1,3,4

DESCRIPTION

783 - 0X0000 - XXX

3/8” TV/US-X

784 - 0X0000 - XXX

1/2” TV/US-X

HAT Fluid Temperature Control Valve

Operation

A thermal wax actuator mechanically operates ThermOmegaTech’s self-operating HAT (heat actuated trap) valve. This thermostatic actuator senses the fluid temperature and will modulate the valve open to initiate flow if the temperature falls below the valve’s set point. Once the fluid temperature increases back to the set-point, the valve will modulate closed to control flow. HAT valves are available with built-in leakage to allow bypass flow.

Typical Applications

  • A subcooling steam trap: discharges condensate to an unpressurized outlet, reducing problems associated with overheating.
  • Regulating temperatures in glycol heat tracing: maintains the discharge temperature for glycol heat tracing used for winterization processes.
  • Freeze protection for condensate systems: The heat-actuated trap valves open when temperatures fall to allow condensate to discharge before freezing.
  • High-temperature for commercial aircraft galleys: HAT valves are installed in airplane galleys where manifolds connect coffee makers and faucets to prevent high-temperature water from traveling to the cold-water lines and scalding passengers and/or crew.
  • Regulating temperatures of tank heating coils: HAT valves limit the temperatures of the heating element by closing before coil temperatures are too high to reduce the risk of over-temperature damage.
  • Sampling system safety shut-off: HAT valves will remain open as long as sample temperatures are under the valve’s set-point. If the sample temperature increases, the valve will close, shutting off the flow and protecting analyzing equipment from damage.

Heat Actuated Trap Valve

HAT - Thermostatic Heat Actuated Trap Valve

Design Features

  • Exclusive self-actuating Thermoloid® blend wax thermal actuator
  • Stainless steel body, fittings, spring, and plug
  • Compact, low mass – fast response
  • Corrosion-resistant – long service life
  • Ram-type plug for reliable shut-off
  • Two wrench flats for easy installation
  • Operates in a narrow temperature band
  • Optional leak port (LP) available

Benefits

  • Self-operating – no external power source is required
  • Return fluid temperature control – ideal for glycol tracing
  • Maintains constant discharge temperatures
  • Improves system efficiency
  • Unaffected by pressure variations
  • Some valves are NSF/ANSI/CAN 61 & 372 Certified

Ordering

PART NUMBER

DESCRIPTION

134 - 302X00 - XXX

1/2” HAT C-Port

134 - 312X00 - XXX

1/2” HAT C-Port, all SS

134 - 502X00 - XXX

1/2” HAT C-RF

134 - 324X20 - XXX

1/2” HAT C-Port, 316 SS Passivated

135 - 502X00 - XXX

3/4” HAT D-Port

135 - 512X00 - XXX

3/4” HAT D-Port, all SS

TV-HAT Fluid Temperature Control Valve

TV/HAT Fluid Temperature Control Valve (with Tube Fittings)

Operation

Utilizing a thermostatic wax actuator, the TV/HAT (Tube Valve/Heat Actuated Trap) freeze protection valve responds only to fluid temperature to control a system. After condensate forms and cools to the valve’s set point, the valve modulates the flow to maintain a constant condensate discharge temperature. During start-up, the TV/HAT is wide open for rapid venting and initial heat-up and then will adjust based on fluid temperature. After shutdown, the valve is self-draining to eliminate freeze damage.

For heating of temperature-sensitive instruments or process fluids, the reduced temperature available for tracing simplifies operations and eliminates overheating problems. For other heat transfer fluids, the TV/HAT freeze protection valve maintains a constant discharge temperature, thus providing the benefits of accurate process temperature control and improved efficiency.

Typical Applications

TV/HAT valves are ideal for use in conjunction with tracer tubing and tracing systems using pre-traced tubing bundles. These valves are optimal for replacing conventional steam traps on winterization tracing, instrument tracing, condensate return system freeze protection, tracing for processes under 150°F (65°C), and other applications requiring in-line flow control based on temperature.

TV-HAT Freeze Protection Valve

Design Features

  • Exclusive self-actuating Thermoloid® blend wax thermal actuator
  • Stainless steel body, fittings, spring, and plug
  • Corrosion-resistant – long service life
  • Compact, low mass for fast response
  • Ram-type plug for tight reliable shutoff
  • Operates in narrow temperature band
  • Standard fittings are Parker A-LOK, but Swagelok are also available

Benefits

  • Self-operating – no external power source required
  • Eliminates live steam losses
  • Downstream actuator for greater sensitivity
  • Unaffected by pressure variations
  • Wide choice of set points
  • Operates in any position
  • Easy to install

Ordering

PART NUMBER

DESCRIPTION

212 - 100X00 - XXX

1/4” TV/HAT-SS2

212 - 110X00 - XXX

1/4” TV/HAT-SS-SW3

213 - 100X00 - XXX

3/8” TV/HAT-SS2

213 - 110X00 - XXX

3/8” TV/HAT-SS-SW3

214 - 100X00 - XXX

1/2” TV/HAT-SS2

214 - 110X00 - XXX

1/2” TV/HAT-SS-SW3

212 - 201X00 - XXX

1/4” TV/HAT-XXX-S6-X

213 - 30000X - XXX

3/8” TV/HAT-XXX-S6-X

214 - 200X02 - XXX

1/2” TV/HAT-XXX-S6-X

US/S-XR Sample Cooler Temperature Control Valve

Operation

The reverse-acting US/S-XR (Ultra Surface Sensing) sample cooler temperature control valve may be installed with the valve’s thermal actuator immersed in the process line or mounted non-invasively to the piping with the optional band-o-let fitting. This allows the thermal wax actuator to be in contact with the process directly or through thermal conduction to regulate the flow of the cooling media.

If the fluid is above the desired set-point temperature, the valve will open allowing cooling fluid to flow until the process flow temperature drops to 10°F below the set-point. Once this occurs the valve will modulate closed again providing an optimal environment for the process.

Typical Applications

Sample cooler temperature control

These compact self-contained sample cooler temperature control valves can be used to control cooling media to economically remove heat from equipment or a process. In general, they can be used whenever accurate, low-cost control is required, but a common application is controlling cooling media flow to a sample cooler in response to sample temperature.

The US/S-X direct-acting valve can also be used to regulate the flow of heating media to prevent a process from overheating.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • Compact low mass – fast response
  • Ram-type plug for reliable shut off
  • All stainless-steel construction
  • Narrow temperature band
  • Unaffected by pressure variations

Benefits

  • Self-operating – no external power source required
  • Maintains optimal process temperature
  • Prevents process overheating
  • Discharges minimal amount of media for temperature control
  • Long service life
  • Quick and easy installation

Ordering

PART NUMBER1

DESCRIPTION

664 - 000000 - XXX

1/2” US/S-XR-S

664 - 010000 - XXX

1/2” US/S-XR-S-BAND2

665 - 000000 - XXX

3/4” US/S-XR-S

665 - 010000 - XXX

3/4” US/S-XR-S-BAND2

TV/US-XR Sample Cooler Temperature Control Valve (with Tube Fittings)

Operation

The reverse-acting TV/US-XR (Tube Fitting/Ultra Surface Sensing) sample cooler control valve opens on rising temperatures to allow cooling fluid in to keep a process from overheating. The valve may be installed so the valve’s thermal wax actuator is immersed in the process fluid or mounted non-invasively to the pipeline with a band-o-let fitting. The TV/US-XR operates the same way as the US/S-X valve, but it has tube compression fittings instead of pipe fittings and the Cv is around half of the US/S-XR valve.

The wax actuator automatically and continuously senses the process temperature either directly or through thermal conduction to modulate the valve open/closed and regulate the flow of cooling media.

Typical Applications

TVUS-XR - Sample Cooler Control Valve

These compact self-contained sample cooler control valves can be used to control cooling media to economically remove heat from equipment or a process. Controlling air flow to a vortex cooling device and controlling cooling media flow to a sample cooler in response to sample temperature are common applications.

The direct-acting model, TV/US-X is designed to monitor and control the flow of heating media to protect facility pipelines from freezing.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • All stainless-steel construction
  • Compact low mass – fast response
  • Ram-type plug for reliable shut off
  • Narrow temperature band
  • Unaffected by pressure variations

Benefits

  • Self-operating – no external power source required
  • Prevents process overheating
  • Discharges minimum amount of media for temperature control
  • Maintains optimal process temperature
  • Quick and easy installation
  • Long service life

Ordering

PART NUMBER1,3,4

DESCRIPTION

793 - 0X0000 - XXX

3/8” TV/US-XR

794 - 0X0000 - XXX

1/2” TV/US-XR

ITCH Assembly | Instrument & Analyzer Enclosure Temperature Control System

Operation

The ITCH (Instrument Temperature Control Heater) Assembly is 100% mechanical, operating solely based on ambient and/or fluid temperature changes controlled by a wax motor.

The thermostatic wax actuator located at one extreme of the TV/SC-A valve operates like the thermostat in an oven, automatically senses the internal enclosure temperature, and regulates steam flow to the heater coil to maintain the desired temperature. The TV/HAT at the steam inlet keeps the steam supply hot to prevent freezing even when the TV/SC-A valve is closed. The TV/HAT at the coil outlet regulates condensate discharge temperature for maximum economy with minimized overheating potential.

The ITCH Heater Assembly comes complete with a steam coil, mounting bracket, and TV/SC-A valve assembly, two TV/HAT valves, and two weather-tight bulkhead fittings for 3/8 tubing connections.

The TV/SC-A and TV/SC-I valves (with external connections) are also available separately if you do not require a complete assembly.

Instrument Temperature Control

Typical Applications

ITCH Assembly - Instrument Temperature Control

The ITCH Assembly, instrument temperature control valve assures accurate temperature control in an instrument or analyzer enclosure. It will maintain enclosure temperature accurately over a wide range of ambient temperatures with steam supply pressures from 15 PSIG (1 BAR) to 200 PSIG (13.8 BAR) without danger of overheating delicate instruments.

This self-contained unit provides a reliable, economical alternative to costly, hazardous electric heating. No special NEMA-7 or 9 housings are required even in potentially explosive environments.

Design Features

  • Exclusive self-actuating Thermoloid® blend wax thermal actuator
  • All stainless-steel construction
  • Compact, low mass – fast response
  • Corrosion-resistant – long service life
  • Ram-type plug for tight reliable shutoff
  • Operating temperatures unaffected by variable inlet pressures
  • Wide choice of set-points available

Benefits

  • Self-operating – no external power source required
  • Economically controls steam flow
  • Maintain enclosure temperature accurately over a wide range of ambient temperatures
  • Eliminates danger of overheating
  • Complete kit with standard tube connections for quick and easy installation

Ordering

PART NUMBER 1
DESCRIPTION2

753-000000-XXX

3/8” ITCH ASSEMBLY

TV/SC-IR Instrument & Analyzer Enclosure Cooling Control Valve

Operation

The reverse-acting TV/SC-IR (Tube Valve/Instrument Enclosure) is Self-Actuated Temperature Regulators designed to open on rising temperature to regulate the flow of cooling media to an enclosure. The thermal wax actuator end of the valve is installed into the wall of the instrument enclosure to continuously senses the ambient temperature within the enclosure.

When the temperature rises above the valve’s set-point it will automatically modulate open to allow the injection of the cooling media. The valve will modulate closed again once the ambient temperature is within 10°F (5.6°C) of the open set-point (Example: a 75°F valve would open at 75°F to allow the insertion of the cooling media and close at 65°F, keeping the enclosure interior between 75 – 65°F).

Typical Applications

TVSC-IR Self-Actuated Temperature Regulators

The TV/SC-IR Self-Actuated Temperature Regulators can be used to keep an enclosure cool via a vortex cooler to protect expensive analyzers and instrumentation from overheating. For example, a 90°F valve would open at 90°F to allow the compressed air into the vortex cooler valve, which then spins the air at high velocity creating a hot and cold fraction of air. As cold air fills the enclosure, the hot air will be expelled outside, maintaining a desired temperature with the enclosure.

For heating applications, the TV/SC-I direct-acting valve opens on falling temperatures to regulate the flow of steam into the enclosure to maintain a desired temperature within the enclosure and to protect instrumentation from freeze damage.

Design Features

  • Exclusive self-actuating Thermoloid® blend wax thermal actuator
  • Stainless Steel body, fittings, spring & plug
  • Compact low mass – fast response
  • Corrosion resistant – long service life
  • Ram-type plug for reliable tight shut-off
  • Compatible with standard tubing and connections

Benefits

  • Self-operating – no external power source required
  • Maintains enclosure temperature within a specified range
  • Eliminates danger of overheating and explosion hazard
  • Unaffected by pressure variations
  • Quick and easy installation

Ordering

PART NUMBER1

DESCRIPTION

743 - 0X1000 - XXX

3/8” TV/SC-IR-S-SS

744 - 0X1000 - XXX

1/2” TV/SC-IR-S-SS

TV/SC-I Instrument & Analyzer Enclosure Temperature Control Valve

Operation

The TV/SC-I (Tube Valve/Steam Control Instrument Enclosure) valve is installed into the wall of the enclosure so that the thermal actuator end is inside to sense the ambient temperature. The thermostatic wax actuator regulates the steam supply to the heater to accurately maintain the desired temperature, operating like a thermostat in an oven.

Heat radiating from the steam coil heater reaches the actuator and will cause it to quickly shut off the steam supply when the desired temperature is reached, regardless of outside ambient to provide the optimal temperature within the enclosure and reduce wasted steam costs.

Typical Applications

TV/SC-I - Thermostatic Temperature Control Valve

The TV/SC-I is often used for freeze protection with steam as the media, to maintain optimal temperatures for instrumentation and analyzer equipment within an enclosure. This self-contained compact thermostatic control valve is a reliable, economical alternative to costly, hazardous electric heating.

In cooling applications, the reverse-acting TV/SC-IR can be used to regulate the flow of glycol, water, air or other cooling media.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • Stainless Steel body, fittings, spring & plug
  • Compact low mass – fast response
  • Corrosion-resistant – long service life
  • Ram-type plug for reliable tight shut-off
  • Direct-acting (No pilot valve)
  • Compatible with standard tubing and connections

Benefits

  • Self-operating – no external power source required
  • Maintains enclosure temperature within a specified range
  • Eliminates danger of overheating and explosion hazard
  • Long service life
  • Unaffected by pressure variations
  • Quick and easy installation

Ordering

PART NUMBER1

DESCRIPTION

733 - 0X1000 - XXX

3/8” TV/SC-I-S-SS

734 - 0X1000 - XXX

1/2” TV/SC-I-S-SS

M&D Thermostatic Mixing Valves & Diverting Valves

Operation

The thermostatic mixing valve/diverting valve is designed to maintain or proportion flow based on temperature in mixing or diverting applications.

In mixing applications where a controlled temperature outlet is required, the 3-way control valve (M/D) will modulate between the hot and cold inlet feeds (ports “B” and “C”) to mix your fluid to the desired specified temperature exiting the “A” port.

In diverting applications where the fluid must be directed from one section of a system to another, the thermal diverting valve (aka thermal bypass valve) will modulate inlet fluid temperature and divert return flow through a cooler/ heat exchanger or bypass it to a reservoir/ bypass loop when fluid temperatures are satisfied. This action assures rapid system warm-up, accurate control of fluid temperature, and reduced back pressure in the return.

Mixing and Diverting Thermal Valves

Mouse over an image of a thermostatic mixing valve/diverting valve to animate.

Thermal Diverting

Animation of Diverting Valve of Hot Temperature

Animation of Diverting Valve of Cold Temperature

Installed in diverting mode, the valve’s thermal actuator will sense the fluid temperature and automatically divert or switch the inlet flow to either of the two outlet ports depending on the valve’s specified temperature requirements.

Thermal Bypassing

Thermal Bypass 4 Port Valve Open

Thermal Bypass 4 Port Valve Closed

The TBV cartridge can be integrated into a 4-way manifold to monitor inlet flow and divert the fluid based on temperature. Cooler fluid goes through the valve bypass, while hotter fluid goes through the system’s cooler.

Thermal Mixing

Thermal Bypass Valve Mixing Hot/Cold Full Open

Thermal Bypass Valve Mixing Cold Open

Installed in mixing mode, the mixing valve’s thermal actuator will sense the temperature to automatically proportion the flow of hot and cold fluid from two inlet ports to produce the desired outlet port temperature.

Typical Applications

  • Battery Cooling
  • Cooling water control for radiator or heat exchanger
  • Direct cooling with raw water
  • Direct injection water heating
  • Electronics system cooling
  • Engine and compressor cooling system
  • Hydraulic fluid cooling systems
  • Hydraulic power units (HPUs)
  • Hydraulic thermal bypass
  • Loop-type circulation systems
  • Lube oil cooling control
  • Lube oil thermal bypass
  • Temperature control for baths, wash basins, and sinks
  • Temperature mixing or diverting
  • Thermal Management
  • Water saving applications

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • Heavy-duty – rugged construction
  • Compact and low mass for fast response
  • Operates in narrow temperature band
  • Standard valve material is bronze or stainless steel

Benefits

  • Self-operating – no external power source required
  • Minimal maintenance needed
  • Wide temperature range
  • Easy installation
  • Few moving parts – reduce system wear

Ordering

PART NUMBER1

DESCRIPTION

353-00X000-XXX

1/2” M/D Valve - 316 SS Body, 300 Series SS Internals

353-02X000-XXX

1/2” M/D Valve - all 316 SS construction

353-01X000-XXX

1/2” M/D Valve - Bronze

356-00X000-XXX

1” M/D Valve - Bronze

356-01X000-XXX

1” M/D Valve - 303 SS

356-02X000-XXX

1” M/D Valve - 316 SS Special Order Only

359-0X4000-XXX

2” M/D Valve - SS