ITCH Assemblies 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. No special NEMA-7 or 9 housings are required even in potentially explosive environments. Enclosure temperatures can be maintained within 2°F (1.1°C) for pennies a day.
At the designated control point, a thermostatic element located at one extreme of the TV/SC-A valve portion of the ITCH Heater Assembly regulates the steam supply to the heater coil to accurately maintain the desired temperature, operating like the thermostat in an oven. The TV/HAT at the valve inlet keeps the steam supply hot right up to the valve. Heat radiating from the steam coil heater reaches the actuator causing it to quickly close the steam supply when the desired temperature is reached, regardless of ambient. In cooling applications, the TV/SC-AR opens on rising temperature to regulate the flow of cooling media to the enclosure. The TV/HAT at the outlet of the steam coil regulates outflow based on the condensate temperature for maximum economy. The ITCH Heater Assembly comes complete with 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. TV/SC-A and TV/SC-I valves (with external connections) are also available separately. The US/S-X and US/S-XR valves Thermoloid® sensor/controller element may be placed against the process line or pipe with the optional weld-o-let or band-o-let, or in the line with the integral 3/4 NPT-M bushing. This allows the temperature element to be in contact with the process to control the valve section and regulate the inflow of heating media (or cooling media with the US/S-XR). Input temperatures or steam supply can vary widely, but the control temperature is maintained within desired limits.
- Complete kit for quick and easy installation
- Eliminates danger of overheating
- Factory tested
- Direct acting (no pilot valve)
- Maintains enclosure temperature within 2°F (1.1°C) of control point
- Eliminates explosion hazard
- All stainless steel body, fittings, spring & plug
- Ram-type plug for reliable tight shutoff
- Unaffected by pressure
- Long service life (36 month pro-rated warranty)
- Compatible with standard tubing and tubing connections