BACK PRESSURE VALVE
Figure 29
The Pulsafeeder diaphragm backpressure valve creates constant backpressure. A TFE
diaphragm, offering maximum chemical protection and service life, seals spring and bonnet from
product. This diaphragm seals directly on a replaceable seat.
Be sure to install with fluid flow in direction of arrow on valve body. If arrow is missing from
plastic valve body, install with flow exiting out center hole of valve body.
PRESSURE RELIEF VALVE
Pressure relief valves should be utilized in any system to protect the pump and other process
equipment and piping from potentially damaging or unsafe pressures. It is critical that the pressure
relief valve be mounted in the discharge piping system before any other devices that can
potentially block or impede flow, or it cannot perform its intended function (refer to Figure 8).
The pressure relief valve must be set to a pressure high enough to prevent unwanted fluid relief
during normal process conditions. A setting that is approximately 10-20% above normal
operating pressures is generally sufficient. The valve must also be set below the maximum
pressure capability of the lowest rated device in the system. For example, if a PULSAR pump is
rated with a maximum pressure capability of 150 psi (approx. 10 bar) but the piping within the
system is rated only to a maximum of 100 psi (approx. 7 bar) then the pressure relief valve must
be set to a value lower than 100 psi.
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