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TP74JA Principle: two highly sensitive pressure
elements which directly oppose each other. It is
used on cooling station system to balance
pressure differential between water controller
and water separator. It has a SPDT floating
action contact. Through operating bypass
valve switch, which realize pressure differential
balance between supply and return water.
Function *Single–pole, double-throw, totally enclosed non-snap acting Penn switch. *1/4 in. flared tube pressure connection on the sensing element permits easy field installation. *Direct reading scale for quick set point determination. *Pressure differential setting can be easily changed without removing the cover. Technical parameters
| Product | Differential pressure controller |
| Scale range | 55 to 414kPa |
| Operating pressure differential | 14kPa, Fixed |
| Max. low pressure bellows overrun | 1241kPa |
| Max.allowable difference in pressure between bellows | 830kPa |
| Electrical rating | 1A, 24VAC, 50/60Hz |
| Contact unit | SPDT, totally enclosed non-snap acting Penn switch |
| Material | 0.062" (1.6mm) cold rolled steel +ABS top cover |
| Finish | Gray baked |
| Mounting | Mounts to flat surface/with a 271-51 universal mouting bracket |
| Wiring connections | Color coded screw type RED terminal (See Page2 wiring diagram) |
| Shipping weight | 2.4 pounds(1.1 kg) |
| Ambient operating temperature | Min. 30°F(-1℃) Max. 140F(60℃) |