Siemens Process Instrumentation Datasheets for Pneumatic Relays and Volume Boosters

Pneumatic relays and volume boosters control output air flow and pressure in response to a pneumatic input signal.  They can perform simple functions such as boosting or scaling the output, or use complex reversal, biasing, and math function operators.
Pneumatic Relays and Volume Boosters: Learn more

Product Name Notes
Series 62 Constant-Differentia l Relays serve as air-flow controllers maintaining a constant air purge for each setting of an integral needle valve.
Series 63 Constant-Differentia l Relays are used in conjunction with an external needle valve to provide constant volume flow rates of liquids or gases over a continuously adjustable range.
Series 661 Amplifying Relays are fixed-gain force-balance instruments, which incorporate bias adjustment that amplify pneumatic instrument signals.
The Model 66 Amplifying and Reducing Relays are used to increase or decrease control-circuit pressure signals.
Series 61 Booster relays reproduce pneumatic signals in a 1:1 ratio for applications where input isolation or increased flow capacity are required. Various models are available to meet a wide...
The Integral Volume Booster was designed for use on pneumatic actuators that require high flow for fast stroking times. The unit reproduces pneumatic signals in a 1:1 ratio for applications...