Thermostatic Steam Tracing Control
The US/S-X Steam Tracing Control Valve helps maintain optimal process temperatures in steam tracing and other heat transfer applications while reducing the risk of process overheating. Its thermostatic operation supports stable process conditions while helping limit excess heat input and unnecessary heating media use.
Designed for quick, straightforward installation and dependable operation in industrial environments, the US/S-X provides a durable temperature control solution with a long service life.
For cooling applications the reverse-acting, US/S-XR can be used to regulate flow to protect a system or process from overheating.
Design Features
- Exclusive Thermoloid® paraffin wax 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
Typical Applications
The US/S-X provides thermostatic temperature control for industrial steam tracing systems where heat is required to prevent freezing or maintain process conditions.
Installed to Pipeline
Installed in Process
Technical Documents
Specifications
- Sizes: ½”, ¾” NPT
- Maximum Operating Pressure: 200 PSIG (13.8 bar)
- Maximum Valve End Temperature: 388°F (198°C)
- Maximum Sensing End Temperature: Range 150ºF (83.3ºC) over set -point with a limit of 300ºF (149ºC)
Ordering
| Part Number | 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 |
Ordering & Configuration Notes
- Full open temperatures “XXX” available: 035°F, 040°F, 050°F, 055°F, 060°F, 065°F, 075°F, 085°F, 090°F, 095°F, 100°F, 105°F, 110°F, 125°F, 130°F, 140°F, 150°F, 155°F, 160°F, 170°F, 180°F, 190°F, and 200°F
- Closing temperature is typically 10°F above opening temperature for Direct Acting valves.
- Includes Band-O-Let fitting.
- Buna is standard; Viton, EPDM, and Kalrez are available. Consult our product team for ordering information.
US/S-X Installation
The sensing end of the US/S-X valve can be immersed directly in the process fluid or mounted non-invasively to the outside of the pipe using the optional Band-O-Let fitting. In surface-sensing installations, the actuator responds to pipe temperature through thermal conduction.
How the US/S-X Valve Works
As a direct-acting valve, the US/S-X modulates heating media flow in response to temperature changes. When the sensed temperature falls to the valve’s specified temperature, the valve opens to increase heat input. As the temperature rises, the valve begins to close, reducing heating media flow and helping maintain the process within the desired temperature range.
For example, a 90°F valve opens at approximately 90°F and closes at approximately 100°F, maintaining the process temperature within a typical 10°F differential.
