For proportional control of pneumatic valves and damper actuators in heating and air-conditioning systems. The TP970 incorporates a relay amplifier giving sensitive control and facilitating averaging control, which requires extra relays when bleed-type thermostats are used. The range comprises factory calibrated bimetal element proportional instruments with a setpoint indicator. The cover is ordered separately, and restrictors are not required.
Branch Line Pressure range 21 ... 105 kPa
Throttling range adjustable 1...5 oC
Max. safe air pressure 175 kPa
Mounting place internal wall
Temp. setpoint range 15 ... 30 oC
Action direct acting