Doc No: OMM50001254
Rev: A Page 13 of 47
Subject to contractual terms and conditions to the contrary, this document and all the information contained herein are the confidential and exclusive
property of FMC Technologies, and may not be reproduced, d
isclosed, or made public in any manner prior to express written authorization by FMC.
2. Always use a pressure gauge in the pump discharge line. A properly
functioning gage mounted at the pump (and before any valves) is required to
accurately determine the operating pressure of a pump and to conduct
troubleshooting.
3. Ensure that all piping is supported independently of the pump to reduce vibrations
and strain on the pump. Pulsation dampeners on the discharge are
recommended to reduce pressure pulsation and resulting vibration. The use of
elbows, nipples, unions, or other fittings should be kept to an absolute minimum.
Avoid short radius 90° elbows; use two long radius 45° elbows instead. To help
isolate mechanical and hydraulic vibrations, FMC recommends the use of flexible
pipe couplings or hose connections between the pump and any rigid piping. The
use of pulsation dampeners can also reduce hydraulic pulsation and resultant
vibrations.
4. A properly adjusted pressure relief valve or rupture disc must be installed directly
downstream of the pump to prevent damage or injuries resulting from over
pressure or deadhead conditions. The relief valve discharge line must be as large
as the pipe outlet of the relief valve. Never install valves in the relief valve
discharge line or between the pump and relief valve. FMC recommends that the
discharge be returned to the tank or drain, not back into the pump suction line.
3.5 Multiple Pump Systems
Special consideration must be taken to avoid vibration, pulsation, or uneven flow
distribution problems when operating multiple reciprocating pumps using common
suction and discharge piping headers. It is recommended that the user contact FMC or
experienced industry consultants for assistance with the design of the system and pump
installation in these situations.
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