Operation
As the fluid temperature increases to within the operating range of the ECONO/HAT-RA, the valve’s internal thermal actuator modulates it open to discharge the over-temperature fluid. If the temperature exceeds the acceptable range, the thermal relief valve will continue to modulate open, allowing additional fluid discharge. As the outlet temperature falls, the thermal safety valve modulates toward the closed position, reducing flow.
This modulating action maintains a relatively constant fluid temperature even as operating conditions vary. The water discharge can be collected, reused, or repurposed to reduce waste.
Typical Applications
The ECONO/HAT-RA valve is primarily used for thermal relief on booster pumps to keep them cool during idling. It can also be used to control cooling water outlet temperature or flow of cooling water, glycol, or other cooling media in applications requiring economical heat removal from equipment or a process.
Since ECONO/HAT-RA valves open on rising temperatures, they can be used in other thermal relief valve applications. These pump thermal relief valves save space, install in seconds, and eliminate the use of extra, expensive, and time-consuming piping. The unique ram-type plug & seat provide reliable, tight shutoff longer than any other design. As a leading thermal relief valve manufacturer, we are committed to delivering versatile products to suit the demands of our customers’ facilities.
Design Features
- Exclusive self-actuating Thermoloid® wax blend thermal actuator
- Compact, low-mass
- Corrosion-resistant, long service life
- Ram-type plug for tight, reliable shutoff
- Wrench flats for easy installation
- Narrow temperature band
Benefits
- Self-operating – no external power source required
- Protects pumps and pump seals from over-temperature damage
- Prevents scalding water from being distributed to users
- Unaffected by pressure variations
- Stainless steel valves are NSF/ANSI/CAN 61 & 372 Certified
Ordering
Operation
The self-operating HAT/RA-HP (Heat Actuated Trap/Reverse Acting – High Pressure) Thermostatic Thermal Relief Valve is installed onto the pump to monitor the fluid temperature. If the fluid temperature increases to within the operating range of the HAT/RA-HP, the thermal actuator will modulate the valve open to discharge the over-temperature fluid. As the outlet temperature falls, the valve modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature and reduces wasted water and energy.
Typical Applications
The HAT/RA-HP is commonly used as a thermal relief valve on fire pumps and high-pressure water pumps to keep them cool during idling. It may be used as a regulating valve to maintain the flow of glycol, water, or other media in critical cooling applications and to economically remove heat from equipment or a process.
Design Features
- Exclusive self-actuating Thermoloid® wax blend thermal actuator
- Rated for higher pressure systems – up to 1000 PSIG
- All stainless-steel body, fittings, spring, and plug
- Compact, low mass – fast response
- Corrosion resistant – long service life
- Ram-type plug for reliable shut-off
- Operates in a narrow temperature band
Benefits
- Self-operating – no external power source required
- Protects pump and pump seals from over-temperature damage
- Maintains constant discharge temperature
- Improves system efficiency
- Unaffected by pressure variations
- Discharges minimum amount of water to keep water temperature at safe limits
- Quick and easy installation
- NSF/ANSI/CAN 61 & 372 Certified
Ordering
Operation
The GURU DL 2.1 locomotive freeze protection valve may be thought of as an automatic freeze-out plug with one crucial difference: The stainless-steel GURU® Cartridge releases itself from its body at a pre-set water temperature (35°F or 40°F), rather than being forced out by the tremendous pressure of expanding ice. This provides almost a full one-inch bore to rapidly drain a typical locomotive’s coolant system before damage can occur.
Simply put, the self-operating GURU DL2.1 locomotive freeze protection drain valve continuously monitors and automatically responds to the temperature of the water-cooling system in diesel locomotives. If the water temperature falls to the valve’s set-point, the GURU® Plug will automatically snap open and drain the system before it can freeze.
Resetting and rearming the GURU® Plug is easily accomplished by reheating the cartridge and reinserting it into the hex nut. We recommend utilizing our GURU® Flag and Clip or GURU® Flag and Key tool during the refill process to prevent the GURU® Plug from triggering open by the cold water during the refill.
These tools provide a visual indicator that a refill process is in place and prevents personnel from using a penny, washer, zip tie, or another method to keep the valve stem in place. These “tools” could result in personnel forgetting to remove them before the locomotive goes back into service and possibly result in freeze damage to the locomotive down the line.
Typical Applications
Diesel locomotives depend on reliable freeze protection solutions to get them through the winter. Without a drain valve that can be trusted to operate correctly, locomotives can suffer catastrophic damages, resulting in expensive repair and schedule delays.
The self-actuating GURU® DL2.1 eliminates the risk of freezing in locomotives, compressor set cooling systems, stand-by diesel heating circulators, hot water cab heater lines, and onboard tanks and piping.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Thermal actuator sensing surface is the only wetted part
- Long service life: All moving parts are stainless steel
- Design excludes cooling water chemicals and other debris from moving parts
- Several body styles are available for various applications: 1-1/4 NPT, tee, and flanged tee.
- Paint mask minimizes accidental paint-ins
- Knob on cartridge for easy installation and removal even in hard-to-reach locations
- Extra port for temperature bushing
- Choice of release temperatures: 35°F / 40°F
Benefits
- Self-operating – no external power source required
- Will not trip or dump while the locomotive is running
- Not affected by airflow or air temperature surrounding the valve
- Rapid draining
- Easy system refill
- Easily maintained and tested in the field
- Slotted actuator feature prevents nuisance dumps when refilling the cooling system with cold water
- Valve automatically rearms after filling and reheating
- Optional domed anti-tamper cap eliminates the ability to tamper with the valve resetting stem
Operation
The Magnum GURU® Plug has a higher discharge capacity than the standard GURU® Plug. This thermostatic drain valve responds to the engine coolant temperature and will pop open to rapidly drain the system before freeze damage can occur when the coolant reaches the valve’s set point (35°F or 40°F) providing almost a full 1.2-inch bore.
Designed with 1-7/8” UN—2B Straight Threads and an O-ring, the Magnum Plug eliminates the need for Teflon tape and pipe dope, making maintenance and replacement a breeze.
Resetting and rearming the GURU® Plug is easily accomplished by simply reheating the cartridge and reinserting it into the hex nut. We recommend utilizing our GURU® Flag and Clip or GURU® Flag and Key tool during the refill process to prevent the GURU® Plug from snapping open again from the cold resupply water.
Typical Applications
The self-actuating Magnum GURU® Plug is used to prevent freeze damage in diesel locomotive engines, compressor set cooling systems, stand-by diesel heating circulators, hot water cab heater lines, and onboard tanks and piping.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Thermal actuator is the only wetted part
- Design excludes cooling water chemicals and other debris from moving parts
- Long service life: All moving parts are stainless steel
- Available in modified 1-1/4” NPT tee or flanged tee body styles
- Straight SAE threads and O-ring seals provide easy field maintenance & testing
- Paint mask minimizes accidental paint-ins
- Knob on cartridge for easy installation and removal even in hard-to-reach locations
Benefits
- Self-operating – no external power source required
- Drains twice as fast as the GURU® DL2.1
- Will not trip or dump while the locomotive is running
- Not affected by airflow or air temperature surrounding valve
- Easy installation
- Easy system refill
- Slotted actuator feature prevents nuisance dumps when refilling the cooling system
- Valve automatically rearms after filling and reheating
- Optional domed anti-tamper cap eliminates ability to tamper with the valve resetting stem
Operation
The GURU® Valve DL2.1 CH and CHS may be thought of as an automatic freeze-out plug with one important difference: The stainless-steel GURU® Cartridge releases itself from its body at a pre-set water temperature (35°F or 40°F), rather than being forced out by the tremendous pressure of expanding ice. This provides almost a full one-inch bore to rapidly drain the typical compressor before damage can occur.
The self-operating GURU® Valve DL2.1 CH and CHS continuously monitor and automatically respond to temperatures in the water-cooling system in diesel locomotives. If the water temperature falls to the valve’s set-point (either 35°F or 40°F/1.6°C or 4.4°C), the GURU® Plug will automatically snap open and drain the system before it can freeze.
Resetting and rearming the GURU® Plug is easily accomplished by simply reheating the cartridge and reinserting it into the hex nut. We recommend utilizing our GURU® Flag and Clip or GURU® Flag and Key tool during the refill process to prevent the GURU® Plug from triggering open by the cold water during the refill.
Typical Applications
These valves are designed for a diesel locomotive’s water-cooled air compressor head freeze protection. The GURU® CHS adapts to Gardner Denver’s compressor set cooling systems. Most common on EMD’s SD70 locomotives.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Thermal actuator sensing surface is the only wetted part
- Easily retrofits into water cooled air compressor heads
- Flanged and 2” NPT threaded styles
- Long service life: All moving parts are stainless steel
- Design excludes cooling water chemicals and other debris from moving parts
- Paint mask minimizes accidental paint-ins
- Knob on cartridge for easy installation and removal even in hard-to-reach locations
- Choice of release temperatures: 35°F / 40°F
Benefits
- Self-operating – no external power source required
- Will not trip or dump while the locomotive is running
- Not affected by airflow or air temperature surrounding the valve
- Rapid draining
- Easy system refill
- Easily maintained and tested in the field
- Slotted actuator feature prevents nuisance dumps when refilling the cooling system with cold water
- Valve automatically rearms after filling and reheating
- Optional domed anti-tamper cap eliminates the ability to tamper with the valve resetting stem
Operation
The GURU® Flag and Clip has a clip at the end of the cable that is inserted into the slot in the GURU® stem/cam after warming the nose of the cartridge. The flag can then be attached to the side of the locomotive by its magnetic base to provide an external indication that the GURU® has been disabled. When the locomotive’s cooling system is back up to temperature, the clip is easily removed and the GURU® is again armed to protect the locomotive.
Typical Applications
The GURU® Flag and Clip Tool allows filling a locomotive’s cooling system with cold water that would otherwise trip the GURU® Plug open. It is an essential tool to rearm your valves while minimizing the risk of having a deactivated GURU® Plug in service.
The GURU® Flag is a highly visible indicator that the clip is inserted and the GURU® Plug is deactivated. This will help to prevent leaving a penny or washer in the valve resetting stem, defeating the valve’s function and possibly resulting in freeze damage to the locomotive.
Design Features
- Magnetic base attaches to locomotive body or running board
- Flashing light for increased visibility
- Long cable length for easy placement
Benefits
- Allows refilling of locomotive with cool water without tripping of GURU® Plugs
- Alerts to the presence of deactivated GURU® Plugs
- Minimizes risks of deactivated GURU® Plugs
- Can be used with Magnum and DL 2.1 Plugs
Operation
The key at the end of the cable on the GURU® Flag and Key is inserted into the cartridge end after warming the nose of the cartridge. The flag can then be attached to the side of the locomotive by its magnetic base to provide an external indication that the GURU® has been disabled. This will help to prevent leaving the key in the valve resetting stem, defeating the valve’s function, and possibly resulting in freeze damage to the locomotive.
When the locomotive’s cooling system is back up to temperature, the key can easily be removed and the GURU® is again armed to protect the locomotive.
Typical Applications
The GURU® Flag and Key is required to be used in conjunction with GURU® valves with anti-tampering caps to keep the valve from “popping” during a locomotive’s cooling system refill process. The anti-tampering caps are designed so the valve’s resetting stem is not accessible, eliminating the ability to leave a penny or washer tucked up under it.
Design Features
- Magnetic base attaches to locomotive body or running board
- Flashing light for increased visibility
- 3 lanyards for easier maintenance
- Long cable length for easy placement
- Quick release pin inserts into dome GURU® cap to eliminate tampering abilities
Benefits
- Allows refilling of locomotive with cool water without tripping of GURU® Plugs
- Alerts to the presence of deactivated GURU® Plugs
- Minimizes risks of deactivated GURU® Plugs
- Eliminates ability to tamper with the valve resetting stem
- Can be used with Magnum and DL 2.1 Plugs
Operation
Water-cooled compressor heads on locomotives are known to accumulate dirt and other foreign matter which eventually reduces the compressor’s efficiency. If left un-cleaned, the cooling jacket in the head can become completely blocked by foreign matter, which is why a compressor head cleaning tool is needed.
Install a ball valve shut-off valve at the end of a pressurized water source and hose. Using a thin head 7/8” wrench (available in a kit) against the wrench flats on the nose of the CHCT cleaning tool to hold against rotation, tighten the hose to the cleaning tool. The inlet threads to the tool are 3/8” NPT male pipe thread.
With the engine, off (no water pressure in the cooling system), remove the GURU® CH or CHS freeze protection cartridge by turning counterclockwise about one-third turn. Insert the cleaning tool into the GURU® CH or CHS body by pushing inward and turning one-third turn clockwise.
Open a valve downstream of the compressor head which will allow the cleaning water and dirt to be flushed out of the system. Open the water supply shutoff valve to allow the water jets of the cleaning tool to clean the compressor head.
After the cleaning is completed, turn off the water by closing the shutoff valve, remove the cleaning tool by rotating counterclockwise about one-third turn, and replace the GURU® Plug cartridge to maintain freeze protection. Close the drain valve used to discharge the dirt from the system prior to refilling with cooling water.
Design Features
- All components are stainless steel for corrosion resistance and durability
- Cleaning tool fits into standard DL2.1 GURU® Plug Type CH flanged body and CHS
- Provides four water jets to clean out the compressor head cooling jacket
Benefits
- Clears compressor heads of dirt and foreign matter
- Quickly cleans water-cooled compressor heads
- Protects cooling jacket from blockage
- Connects to any water source for cleaning
The Problem
- Many buildings require multiple branches off the hot water supply line.
- Water flows to the path of least resistance.
- Hot water use is hyper-dynamic, so the path of least resistance constantly changes.
- Manual flow control valves cannot efficiently resolve these issues.
The Solution
Install a CircuitSolver® thermostatic balancing valve on each hot water supply branch line in a recirculation system immediately downstream of the last runout to a hot tap to guarantee hot water availability at any hot water fixture in your building regardless of demand usage.
Operation
The CircuitSolver Thermostatic Balancing Recirculation Valve constantly compensates for the fact that water always flows to the path of least resistance. As water use constantly changes throughout a building that path of least resistance also changes. By installing a CircuitSolver® immediately downstream of the last hot water fixture on each hot water branch line before it tees into the common hot water return line, the temperature of the hot water distribution system stays perfectly balanced, automatically.
CircuitSolver® opens when the water temperature drops below the set-point of the valves. This creates a path of least resistance inducing flow until the temperature reaches the valve’s set-point again, then the CircuitSolver® closes. The valve modulates based on temperature differential from set-point so there is never a sudden closing which could create a water hammer.
Since the valve movement is automatic, manual adjustment is not required. This eliminates the typical testing and balancing procedure that is needed to adjust valves that restrict flow based on pressure differential.
By allowing only fluid that cools below the valves’ set-point to flow to the return, CircuitSolver® valves minimize heat loss by reducing the average temperature and GPM of the return line. This eliminates the need for oversized recirculation pumps, reducing pipeline erosion and energy waste.
If you are adjusting pressure regulating valves for your pressure booster pumps in a multi-story building, be sure the hot water system is full of cold water. Then, all of the CircuitSolvers will be in the full open position.
Design Features
- Self-actuating Thermoloid wax blend thermal actuator
- Stainless-steel body and internal components
- Tamper-proof – fixed set-point
- Array of configurations
- High Cv
Benefits
- Self-operating – no external source of power required
- No manual balancing required
- Hot water on-demand
- Lower GPM flow in hot water return line eliminates the need to oversize recirculation pumps and minimizes erosion-corrosion problems caused by excessive velocity
For more information on CircuitSolver, visit our CircuitSolver website.
Operation
Installed at the lowest point or dead leg branch, HAT/FP utilizes our thermostatic wax actuator technology to monitor ambient or water temperatures automatically and will bleed off the cold water in the lines before freezing can occur. HAT/FP freeze protection valves initiate flow when the thermostatic actuator senses the valve’s set-point, typically 35°F (1.6°C), and will remain open as long as the discharge water temperature is below 5 degrees above that, typically 40°F (4.4°C).
DEPENDING ON THE APPLICATION NEEDS, the HAT/FP freeze protection valve can be installed in either the standard or reverse flow orientation. In standard flow orientation, the wax actuator will sense the ambient temperature to initiate flow and then respond to water temperature once flow is established. In reverse flow orientation, the wax actuator will sense the water temperature at the point of installation to initiate flow and continue to respond to water temperature once flow is established.
Typical Applications
Relying on manually opening valves for freeze protection allows for human error or plugging partially cracked valves. This annually accounts for large amounts of freeze damage resulting in huge monetary losses, including repairing damaged equipment and piping and system downtime.
The self-actuating HAT/FP valve eliminates the human errors associated with manual valves. Automatic freeze protection valves are ideal for protecting piping, safety showers, eyewash or facewash stations, solar collectors & piping, condensate systems, fire lines, spray nozzles, or as backup/fail-safe protection on traced systems.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Corrosion-resistant
- Narrow temperature band
- Compact and low mass
- Stainless steel body, fittings, spring, and plug
- Two wrench flats for easy installation
- Ram-type plug for reliable shutoff
Benefits
- Self-operating – no external power source required
- Protects against freeze damage
- Primary protection or fail-safe backup
- Long service life
- Fast response
- Discharges minimum amount of water required
- Some valves are NSF/ANSI/CAN 61 & 372 Certified
Ordering
| |
| ½” HAT/FP-35-B-SS-E (Ambient Sensing) |
| ½” HAT/FP-35-B-SS-RF-E1(Fluid Sensing) |
| ½” HAT/FP-35-C-E (Ambient Sensing) |
| ½” HAT/FP-35-C-RF-E2 (Fluid Sensing) |
| ½” HAT/FP-35-C-SS-E (Ambient Sensing) |
| ½” HAT/FP-35-C-SS-RF-E2 (Fluid Sensing) |
| ¾” HAT/FP-35-D-E (Ambient Sensing) |
| ¾”HAT/FP-35-D-SS-E (Ambient Sensing) |
| ¾” HAT/FP-35-D-SS-RF-E2 (Fluid Sensing) |
Operation
The HAT/SP scald protection valve should be installed at the highest point on an emergency safety station to continuously sense and automatically bleed off the excessively hot water. Depending on installation orientation, the thermal actuator at the heart of the valve will sense either the ambient or fluid temperature. It will modulate the valve open to establish flow if the temperature is above the valve’s set-point.
Cooler water from the supply will backfill the line and cause the valve to modulate closed once the water temperature falls to 10°F below the open set-point.
When installed in the ambient sensing position (standard flow), the thermal actuator will respond to atmospheric temperature changes to initiate flow and then respond to water temperature once flow is established.
- More conservative choice
- Opens sooner than fluid sensing on dropping temperatures
- More tolerant of dirty water
- Good choice for warmer climates
The actuator will always respond to the water temperature when installed in the fluid sensing position (reverse flow).
- Used as a backup with insulated piping or heat tracing
- Ideal for colder climates
- Results in less nuisance dumping/draining
Typical Applications
A safety hazard for plant personnel can occur when utilizing safety showers, facewash, or eyewash stations if overheating the pipes caused by solar radiation or steam/electric tracing results in extremely high temperatures at the point of use. The HAT/SP scald protection valve prevents this safety hazard.
When installed in safety showers, eyewash stations, and other locations exposed to the same source of overheating as the system, the HAT/SP will be heated just as the pipe system. The valve will open to establish flow until the overtemperature water is eliminated and it will then modulate closed.
Design Features
- Exclusive self-actuating Thermoloid® wax blend thermal actuator
- Stainless steel body, fittings, spring, and plug
- Compact, low-mass – fast response
- Corrosion-resistant – long service life
- Ram-type plug for reliable and tight shutoff
- Installs in any orientation
Benefits
- Self-operating, no external power source required
- Meets ANSI Z358.1 standards
- Keeps operator safe from scalding
- Discharges the minimum amount of water
- Some valves are NSF/ANSI/CAN 61 & 372 Certified
Ordering
| |
| ½” HAT/SP-XXX-C-E (Ambient Sensing) |
| ½” HAT/SP-XXX-C-SS-E (Ambient Sensing) |
| ½” HAT/SP-XXX-C-RF-E1(Fluid Sensing) |
| ½” HAT/SP-XXX-C-SS-RF-E (Fluid sensing) |
| ¾” HAT/SP-XXX-D-E (Ambient Sensing)
|
| ¾” HAT/SP-XXX-D-SS-E (Ambient Sensing) |
| ¾” HAT/SP-XXX-D-RF-E (Fluid Sensing)
|
| ¾” HAT/SP-XXX-D-SS-RF-E1 (Fluid Sensing) |
Operation
The IC/FP Interchangeable Cartridge Freeze Protection Valve is installed into the lowest point within the heated system. The thermal actuator is tee’d into the NPT threaded opening with adequate internal clearance to monitor the water temperature. When the water temperature drops below the valve’s set point, typically 35°F (1.7°C), the thermal actuator modulates the valve open.
Once the makeup water temperature returns to the safe range (5 degrees above the open set point, typically 40°F [4.4°C] ), the valve then modulates closed, minimizing water waste. Due to the sensing element, the thermal actuator, always being wetted this valve is unaffected by ambient air temperature and opens only when the water is in danger of freezing.
Typical Applications
Relying on having to manually open valves for freeze protection allows for human error or plugging of partially cracked valves. This annually accounts for large amounts of freeze damage resulting in huge monetary losses including repairing damaged equipment and piping, as well as system downtime.
The self-actuating IC/FP cartridge freeze protection valve eliminates the human errors associated with manual valves.
The automatic IC/FP valve is ideal for the protection of piping, safety showers, solar collectors & piping, condensate systems, fire lines, spray nozzles, or as backup protection on traced systems. Its sensitivity to water temperature makes this valve ideal for applications where water conservation or wastewater disposal are a prime concern.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Corrosion-resistant
- Narrow temperature band
- Compact and low mass
- Brass or stainless-steel body, fittings, & plugs
- Two wrench flats for easy installation
- Ram-type plug for reliable shutoff
Benefits
- Self-operating – no external power source required
- Protects against freeze damage
- Primary protection or fail-safe backup
- Long service life
- Fast response
- Discharges minimum amount of water
- Some valves are NSF/ANSI/CAN 61 & 372 Certified
Ordering
| |
| |
| |
| 1/2” IC/FP-35 SS Cartridge1 |
| 1/2” IC/FP-39 SS Cartridge1 |
| |
| 3/4” IC/FP Cartridge 316 SS1 |
| 3/4” IC/FP Cartridge 303 SS1 |
Operation
IC/SP scald protection valves are installed within the heated system and are purely water temperature sensing. The IC/SP scald protection valve will initiate flow when the thermostatic actuator senses water temperature above the valve’s set-point (typically 98°F [36.7°C]) and will remain open as long as the discharge water temperature is within 10˚F of the open set-point (typically above 95°F [35°C]). The thermal actuator is always wetted, making this valve preferable for heat traced lines where scald protection flow is not required unless heat tracing fails.
Typical Applications
A safety hazard for plant personnel can occur when utilizing safety showers, facewash, or eyewash stations if overheating of the pipes caused by solar radiation or steam/electric tracing results in extremely high temperatures at the point of use. For this reason, a scald protection valve should be implemented to protect facility personnel from excessively hot temperatures being released from the fixture and causing severe damage to the skin.
The IC/SP valve prevents this safety hazard. When installed in safety showers, eyewash stations, and other locations exposed to the same source of overheating as the system, the IC/SP will be heated just as the pipe system. The valve will open to establish flow until the over-temperature water is eliminated and it will then modulate closed.
Design Features
- Exclusive self-actuating Thermoloid® wax blend thermal actuator
- Brass or stainless-steel body, fittings, & plugs
- Compact and low mass – fast response
- Corrosion-resistant – long service life
- Ram type plug for reliable and tight shutoff
- Two wrench flats for easy installation
- Operates in narrow temperature band
Benefits
- Self-operating – no external power source required
- Meets ANSI Z358.1 standards
- Prevents scalding to operator
- Primary protection or fail-safe backup
- Discharges the minimum amount of water
- Stainless steel valves are NSF/ANSI/CAN 61 & 372 Certified
Ordering
Operation
The HAT/RA (reverse-acting heat actuated trap valve) is designed to monitor, control, and regulate flow, utilizing a temperature control actuator to constantly sense in-line fluid temperature. Since it is what we classify as reverse-acting, the thermal valve will open on rising temperatures.
As the fluid temperature increases to within the operating range of the HAT/RA, the thermal actuator modulates the valve open. If the fluid temperature is above the valve’s set point, the valve will continue to modulate open allowing additional fluid discharge.
As the outlet temperature falls, the valve then modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature even as operating conditions vary.
Typical Applications
The HAT/RA valve may be used to regulate the flow of cooling water, glycol or other cooling media in applications requiring economical removal of heat from equipment or a process. Since the HAT/RA valves open on rising temperatures, they can be used in many thermal relief valve applications.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Compact low mass – fast response
- Corrosion-resistant – long service life
- Operates in narrow temperature band
- Stainless steel body, fittings, spring, and plug
- Two wrench flats for easy installation
- Ram-type plug for reliable shut-off
Benefits
- Self-operating – no external power source required
- Maintains constant discharge temperatures
- Unaffected by pressure variations
- Wide choice of set points
- Operates in any orientation
- Conserves water
- Valves with stainless steel internals are NSF/ANSI/CAN 61 & 372 Certified
Ordering
| |
| |
| 1/2” HAT/RA B-Port all SS
|
| |
| 1/2” HAT/RA C-Port all SS
|
| |
| 3/4” HAT/RA D-Port all SS |
Operation
The HAT/RA-LP (reverse-acting heat actuated trap valve with leak port) is a cooling water control valve designed to automatically and continuously maintain a constant temperature in liquid cooling systems. Since it is what we classify as reverse-acting, the valve will open on rising temperatures.
At start-up, the valve is closed except for its “control leakage”, which allows a small amount of flow through the valve so that the temperature control actuator can sense the changing fluid temperature upstream in the system.
As the fluid temperature increases to within the operating range of the HAT/RA-LP, the thermal actuator modulates the valve open. If the fluid temperature is above the valve’s set point, the valve will continue to modulate open allowing additional fluid discharge.
As the outlet temperature falls, the cooling water control valve then modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature even as operating conditions vary.
Typical Applications
HAT/RA-LP valves are ideal for maintaining cooling temperatures in water-cooled compressors,
die-casting equipment, engines, water-cooled heat exchangers, welding equipment, electrical equipment, and molding equipment.
Design Features
- Exclusive self-actuating Thermoloid® blend paraffin wax actuator
- Corrosion-resistant – long service life
- Compact low mass – fast response
- Operates in narrow temperature band
- Stainless steel body, fittings, spring, and plug
- Ram-type plug for reliable shut-off
- Leak port (LP) senses changing upstream temperature
Benefits
- Self-operating – no external power source required
- Maintains constant discharge temperatures
- Improves system efficiency
- Unaffected by pressure variations
- Conserves water
- Easy installation
- Valves with stainless steel internals are NSF/ANSI/CAN 61 & 372 Certified
Ordering
| |
| 1/2” HAT/RA-LP B-Port 1/4 GPM
|
| 1/2” HAT/RA-LP B-Port, all SS 1/4 GPM
|
| 1/2” HAT/RA-LP C-Port, 1/4 GPM
|
| 1/2” HAT/RA-LP C-Port, all SS 1/4 GPM
|
| 3/4” HAT/RA-LP D-Port 1/4 GPM
|
| 3/4” HAT/RA-LP D-Port 1 GPM
|
| 3/4” HAT/RA-LP D-Port, all SS 1/4 GPM
|
| 3/4” HAT/RA-LP D-Port, all SS 1 GPM |
