Suggested Piping System For Plunger Pumps - Pentair Myers Aplex Series Installation And Service Manual

NOTES
1) CENTERLINE OF PUMP SUCTION (INLET) TO BE
SLIGHTLY HIGHER THAN CENTERLINE OF SUCTION
(INLET) VALVE, SO ANY AIR IN SUCTION SYSTEM
PROMPTLY REACHES THE PUMP AND IS EXPELLED.
2) SLOPE BYPASS SO LOW POINT DRAIN WILL FULLY
EMPTY RELIEF AND CHOKE VALVES AND ALL
LIQUID IN BYPASS CIRCUIT.
3) DO NOT LOCATE PIPING OR OTHER EQUIPMENT
IN FRONT OF OR ABOVE PUMP LIQUID END,
PREVENTING SERVICING.
4) LOCATE CHARGING PUMP AT POINT SHOWN IF A
CHARGING PUMP IS NECESSARY (AS FOR VOLATILE
FLUIDS, FOR EXAMPLE).
5) IF DESIRED, A TWO-WAY MOTOR-OPERATED BYPASS
VALVE MAY BE USED RATHER THAN A MANUAL
TYPE. IT SHOULD BE DESIGNED TO OPEN
AUTOMATICALLY WHILE STARTING OR STOPPING.
6) FEED LINE AND BYPASS LINE SHOULD FEED
LIQUID INTO TANK BELOW MINIMUM LIQUID LEVEL.
NEEDLE OR HARD-TRIMMED CHOKE BYPASS VALVE OPEN TO
EXPEL AIR IN PUMP PRIOR TO LOADING (SEE NOTE 5)
FULL-OPENING RELIEF VALVE OR BURST-DISC
VALVE OPENS FULLY WHEN SET PRESSURE IS
REACHED
HORIZONTAL PLUNGER PUMP WITH
DUAL SUCTION AND DUAL DISCHARGE
CONNECTIONS (DRIVER AND
FOUNDATIONS NOT SHOWN)
PRESSURE GAUGE AND BLOCK VALVE
DISCHARGE PULSATION
DAMPENER (IF USED)
SUCTION PULSATION
DAMPENER (IF USED)
DISCHARGE LINE
(SEE NOTE 7)
FULL-OPENING DISCHARGE LINE VALVE

SUGGESTED PIPING SYSTEM FOR PLUNGER PUMPS

BYPASS LINE
FULL-OPENING SUCTION (INLET) LINE VALVE
LOW POINT DRAIN VALVE
(SEE NOTE 2)
FLEXIBLE HOSE OR EXPANSION
JOINT (SEE NOTE 7)
FLEXIBLE HOSE OR
EXPANSION JOINT
(SEE NOTE 7)
PRESSURE GAUGE
AND BLOCK VALVE
ECCENTRIC REDUCER WITH
FLAT SIDE UP
CENTERLINE OF PUMP SUCTION (INLET)
(SEE NOTE 1)
PRESSURE RELIEF VALVE AND
COLD WEATHER DRAIN
(SEE NOTE 9)
SWING CHECK VALVE WITH FULL-OPENING SEAT
VORTEX SPLITTER
AND SUPPORT
SEE NOTE 4
SUCTION (INLET) LINE. SEPARATE
LINE REQUIRED FOR EACH PUMP
IF MULTIPLE PUMPING UNITS ARE
USED. SIZE OF LINE DEPENDS ON
ACCELERATION HEAD FACTOR
BUT MUST AT LEAST EQUAL PUMP
SUCTION CONNECTION SIZE.
(MINIMUM)
18
MINIMUM
LIQUID
LEVEL
LIQUID
SUPPLY
TANK
MANHOLE
COMPLETELY SUBMERGED BAFFLE
PLATE SEPARATING INCOMING
FROM OUTGOING LIQUID
SUCTION BELL. DESIGNED FOR LOW
LIQUID ENTRY VELOCITY (MAY INCLUDE
FOOT VALVE IF DESIRABLE)
7) TO REMOVE PIPING STRAIN AND VIBRATION, A
FLEXIBLE HOSE, EXPANSION JOINT, OR SWIVEL
JOINT PAIR SHOULD BE POSITIONED TO
MINIMIZE EFFECTS OF PIPING THERMAL
EXPANSION, CONTRACTION AND PIPING WEIGHT.
8) SUCTION AND DISCHARGE PIPING MUST BE
SUPPORTED AND ANCHORED.
9) TO PROTECT SUCTION SYSTEM AGAINST
HAZARD OF DISCHARGE PRESSURE ENTRY (AS
WHEN PUMP IS IDLE) A SMALL RELIEF VALVE
IS OFTEN CONNECTED HERE.
10) ALL SYSTEM CONPONENTS MUST HAVE ADEQUATE
PRESSURE RATINGS FOR OPERATING, STARTING,
AND UPSET CONDITIONS IN ORDER TO REDUCE
POTENTIAL HAZARDS, PARTICULAR ATTENTION
IS RECOMMENDED FOR THE SURGE CONDITION
THAT WILL RESULT DOWNSTREAM OF THE RELIEF
VALVE WHEN NORMAL DISCHARGE IS BLOCKED.
FEED LINE
(SEE NOTE 6)