Positive Bias Relay is signal operated regulator that provides an output pressure that is the sum of the input signal pressure plus a preset adjustable bias. It is used to convert a low flow signal to the higher flow (up to 50 scfm) requirements of an operating system.
The Type-650 Positive bias relay is a signal operated regulator that provides an output pressure that is the sum of the input signal pressure plus a preset bias. The unit allows flow capacity, ties up to 50 SCFM with minimal pressure drop. An aspirator tube at the output maintains the set pressure under varying flow conditions by causing the main supply valve to open and close proportionally to the flow demand. There is a choice of four adjustment ranges for the positive bias settings.
|Flow Capacity||50 SCFM (1,500 Nl/min) at 100 psig (7 BAR) supply with 20 psig (1.4 BAR)|
|Exhaust Capacity||15 SCFM (450 Nl/min). Downstream 5 psig (0.34 BAR) above set pressure|
|Sensitivity||1/4″ (3.2 mm) water column|
|Effect of Supply Pressure Change||0.1 psi for a 50 psig change|
|Maximum Supply Pressure||250 psig (17.24 BAR)|
|Maximum Signal Pressure||150 psig (10.34 BAR)|
|Maximum Output Pressure||150 psig (10.34 BAR)|
|Ambient Temperature Limits||40°F to 200°F (-40° C to 93° C)|
|Weight||1.75 Ibs. (794 gm)|
|Mounting||pipe, panel or bracket|