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13. Appendix V Pulsafeeder Accessories
13.1 Pulsation Dampeners
The PULSAtrol 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.
