Pulsafeeder Pulsa GLM DM1-6 - Manual (Page 23)

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7. Piping Accessories
Pressure Relief Valves
Pressure relief valves are designed to protect chemical feed systems from damage that may be caused by
defective equipment or a blockage in the discharge line. These valves function to limit the pressure
downstream of the pump. Field adjust the pressure relief valve to operate when the discharge pressure
exceeds operating pressure by 10-15%. Pressure relief valve should always be adjusted to a setting
below the maximum rated pressure of the pump. No potentially restrictive components, such as a valve,
should be installed between the pump discharge and the PRV.
Diaphragm Backpressure Valve
A diaphragm style backpressure valve creates constant back pressure. A PTFE or PTFE-faced
diaphragm offers maximum chemical protection and service life, and seals spring and bonnet from
product.
Be sure to install with fluid flow in direction of arrow on valve body.
Pulsation Dampener
A pulsation dampener is a pneumatically charged diaphragm-type chamber that intermittently stores
hydraulic energy. Used on the inlet, it can improve NPSHA (Net Positive Suction Head Available)
characteristics of the suction piping system. On the discharge line it will reduce discharge pressure peaks
and pulsating flow variations.