One thing you don’t want to do is operate a positive displacement pump against a close valve or plugged discharge line where pressure can build beyond the pumps rated capability. Fortunately Penn Valley Pump offers our PVP420 Series of pressure sensor and gauge/switch assemblies. The assembly is provided with a SS316 body and EPDM elastomer sensing sleeve. The cavity within the sensor body is glycerin filled to ensure accuracy. As process pressure is sensed by the 360º elastomeric sleeve, the captive fluid transfers pressure to the gauge and switch. This allows for accurate readings and shutdown if the predetermined pressure has been exceeded. The switch and or gauge are attached to the sensor with SS316 fittings.

However, if you have an installation with a material or plant condition that causes frequent clogging in the suction line, we can supply a switch on this assembly to trip on during high vacuum conditions to let you know when the line is starting to clog.

For the suction side, typically a pressure sensor and gauge only assembly is required. Dry running and low suction head conditions don’t present a problem for the double disc pump, so a switch to shut the pump down upon a high vacuum condition is not normally necessary. The gauge is 4” diameter with SS316 housing and comes with a scale that ranges from 30”Hg to 30psi.

Since pressure builds very quickly on every pump revolution a discharge pressure switch is highly recommend and we would suggest required. The pressure assembly is provided with a NEMA 4X pressure switch and 4” diameter gauge with SS316 housing and with a scale that reads 0 -100psi.

These devices are designed to mount to the top of the suction and discharge dampeners respectively. Each sensor is provided with a SS316 ball valve with quick air release fitting at the top to allow for recharging of the pulsation dampeners and allow the sensor to be cleaned in place by simply opening the isolation valve and utilizing compresses air to clean the sensor.