Cooling Control for Instrument and Analyzer Enclosures
The TV/SC-IR helps prevent enclosure overheating by automatically matching cooling flow to temperature demand. This supports stable operating conditions for sensitive instrumentation while helping reduce overheating-related risks to equipment and enclosure systems, including potential explosion hazards.
For applications requiring steam heating rather than cooling, see the TV/SC-I Instrument Enclosure Temperature Control Valve.
Design Features
- Exclusive Thermoloid® 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
- Unaffected by pressure variations
Typical Applications
The TV/SC-IR is used where instrument and analyzer enclosures require active cooling. A common application is regulating compressed air to a vortex cooling device, which supplies cooled air to the enclosure as temperature rises.
Applications include:
- Analyzer shelters requiring active cooling
- Vortex-cooled instrument enclosures
- Process analyzer housings
- Sample conditioning enclosures
- Cooling media loops for analyzer systems
- High-temperature instrumentation environments
Technical Documents
Specifications
- Sizes: ⅜”, ½”
- 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 |
|---|---|
| 743 – 0X1000 – XXX | 3/8” TV/SC-IR-S-SS |
| 744 – 0X1000 – XXX | 1/2” TV/SC-IR-S-SS |
Ordering & Configuration Notes
- Full open temperatures “XXX” available: 040°F, 045°F, 050°F, 060°F, 070°F, 075°F, 085°F, 095°F, 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 140°F, 150°F, 160°F, 170°F, 175°F, 180°F, 190°F, 200°F and 210°F
- Closing temperature is typically 10°F below opening temperature.
- Standard fittings are Parker A-LOK, but Swagelok are available. The first 0 indicates the fittings.
- 0 = Parker fittings
- 1 = Swagelok
TV/SC-IR Installation
The TV/SC-IR mounts through the enclosure wall with the thermal actuator positioned inside the enclosure to sense internal temperature. Tube-fitting connections allow the valve to integrate with the enclosure’s cooling media supply.
How the TV/SC-IR Works
As the enclosure temperature rises to the valve’s set point temperature, the reverse-acting TV/SC-IR opens to increase cooling media flow. As the enclosure cools, the valve modulates toward the closed position to reduce cooling flow and maintain the desired temperature range.
For example, a 75°F valve opens at approximately 75°F and closes at approximately 65°F, maintaining the enclosure within a typical 10°F operating differential.
