J Line Pump
Horizontal Double Suction Centrifugal Pump – API 610 Process Pump
26 V1.032818
5.1 PIPING THE SYSTEM
NOTE: The information included in this section is intended as a general guideline. For further
information refer to the corresponding section in API Recommended Practices 686.
IMPORTANT: The design of piping and related systems is not the responsibility of Ruhrpumpen. It is,
therefore, recommended that the customer consult a competent specialist skilled in the field of piping
to insure proper design/installation of all the piping.
1. Check whether the piping is loosely laid, so that no strain is placed on the pump.
Piping layout and installation shall provide adequate maintenance and operation
accessibility. Field installed auxiliary equipment shall not interfere with removal of
the machine or driver.
2. Remove the covers of the pump flanges.
3. Check whether the seals are correctly mounted.
4. Install a check valve and a gate valve in the discharge pipe. When the pump is stopped, the
check valve will protect the pump against excessive back-flow pressure and will prevent the
pump from running backward.
The check valve should be installed between the gate valve and discharge flange in
order to permit its inspection.
5. A spool piece should be installed in suction line so that the suction strainer may be installed
and removed with a pressure gauge between the strainer and pump.
6. The suction strainer should be installed between 5 to 20 pipe diameters upstream from the
suction flange.
7. Cone type strainers (otherwise known as “witches –hat” strainers) should be mounted as
recommended by the Hydraulic Institute, that is, with the cone pointing upstream away from
the pump, into the oncoming flow. As the strainer gradually gathers particles from the liquid
and blocks up, this direction will result in the lowest turbulence impact onto the liquid flow
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