P74JA differential pressure controllers are used in water system of central air-conditioning to balance the differential pressure between the pipe of supplying water (hot/chilled) and the pipe of returning water. Its working principle is: when the pressure differential increases over the set point, the valve opens automatically. Water in the supply pipe runs directly to the return pipe, resulting in a reduction in system pressure differential between supply and return.
Feature:
1. Single pole and double throw (SPDT), totally enclosed non-snap acting switch
2. 1/4 in. flared tube pressure connecting on the sensing component permits easy field installation
3. Easy-read calibrated scale
4. Pressure differential setting can be easily changed without removing the outer shell
| Product name | P74JA differential pressure control |
| Scale range | 8~60PSI (55~414Kpa) |
| Operational differential pressure | 2PSI (14Kpa), fixed |
| Max. overload pressure | 180PSI (1241Kpa) |
| Max. pressure differential | 120PSI (830Kpa) |
| Power | 24VAC, 1A, 50/60Hz |
| Terminal contact | SPDT totally enclosed floating PENN switch |
| Material | Box: 1.6mm cold rolled copper |
| Shell: 0.6mm cold rolled copper |
| Finish | Grey baking finish |
| Installation | Horizontal installation or supported by a standard bracket |
| Working environment | -1ºC ~60ºC |
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Shenzhen Highway Automatic Control Equipment Co., Ltd is a leading company, expertising in designing, developing and manufacturing HVAC thermostats and valves.
Established in 2005, Highway Control is located in Shenzhen University-town Business Park (SUB), which is a Holy land of high-tech companies. Through years of high speed development, Highway brand products and services can not only be found in hundreds cities of China, but also used by many Asian, European, North American customers.
We produce and sell main products:
Room thermostats
2/3 ways solenoid valves
Pressure differential
DDC controller
We stick to:
Quality is the life of a brand.
Communication is the basic lubricant of long-term business relationship.
We set our major mission as:
"Energy-saving and being environment-friendly are our major missions. "
