Pulsafeeder Pulsar Shadow - Manual (Page 42)

13. Appendix V Pulsafeeder Accessories
13.1 Pulsation Dampeners
The PULSuppressor pulsation dampener is a pneumatically charged diaphragm-type chamber
that intermittently stores 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 peak pressures and pulsating flow variations.
Figure 23
13.2 Dampener Installation
On both discharge and suction lines, it is desirable to mount the pulsation dampener as close to
the pump connection as possible. It can be mounted in any position: horizontally, vertically, or
at any angle. Vertical orientation places the process connection at the bottom, facilitating
draining of the unit for maintenance or repair. A shutoff valve should always be used between
the piping system and pulsation dampener. If the discharge line is open to atmospheric
pressure, a backpressure valve should also be incorporated in the system beyond the pulsation
dampener to assure proper operation. Pulsation dampeners do require regular maintenance and
inspection. Charge pressure should be checked every 2-4 months and renewed as needed.
Temperature, pressure, and other variables will affect charge life and diaphragm/bladder life.
The diaphragm/bladder in a pulsation dampener is a wearable item that will need periodic
inspection and replacement.
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