Doc No: OMM50002312
Rev: C Page 14 of 54
Subject to contractual terms and conditions to the contrar
y, this document and all the information contained herein are the confidential and exclusive
property of FMC Technologies, and may not be reproduced
, disclosed, or made public in any manner prior to express written authorization by FMCTI.
couplings or hose connections between the pump and any rigid piping or the use
of pulsation dampeners.
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
overpressure 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.
5. It is recommended that a start-up bypass line and valve is installed to allow flow to
bypass the relief valve. This allows the pump to start in an unloaded condition (no
discharge pressure).
4.5 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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