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15. APPENDIX V
PULSAFEEDER ACCESSORIES
PULSATROL INSTALLATION, OPERATION, & REMOVAL
INSTRUCTIONS
The PULSAtrol is a pneumatically charged diaphragm-type chamber that intermittently stores
energy. Used on the inlet, it will 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 28
INSTALLATION
On both discharge and suction lines, it is desirable to mount the
PULSA
trol as close to the
pump connection as possible. It can be mounted in any position: horizontally, vertically, or at
any angle. A shutoff valve should always be used between the piping system and
PULSA
trol. If
the discharge line is open to atmospheric pressure, a backpressure valve should also be
incorporated in the system near the
PULSA
trol 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.
A)
DISCHARGE SETUP
The
PULSA
trol may be precharged with air or nitrogen. When properly precharged the
diaphragm is positioned against the bottom liquid chamber. It is therefore necessary to drain all
liquid below the diaphragm and vent to atmospheric pressure when precharging.
Use the precharge pressure as determined from the
PULSA
trol selection and sizing procedure
(Catalog No. 211). This can vary from 50 to 80% of mean line pressure in accordance with
fluctuation level selected. The
PULSA
trol is now ready for service and the diaphragm will move
to a neutral position as liquid enters the chamber.
Use the following to complete a Pre Charge Procedure for Discharge Installation
Summary of Contents for PULSAR 25HJ
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