Pump Solutions Group Neptune Series 600 dia-PUMP MODELS 610 thru 647 - Manual (Page 27)

APPENDUM
600 SERIES PVC PUMP
THEORY OF OPERATION
The NEPTUNE 600 PVC “dia-Pump” is a double diaphragm pump employing the basic drive unit of the Neptune
series 600 “dia-Pump”.
All drive, stroke control parts and oil head are common to the original flat diaphragm models. An intermediate plate
and all parts in the liquid side are different from the basic pump.
Hydraulic oil displaces a flat diaphragm, which displaces “an intermediate fluid” which, in turn, flexes the second flat
diaphragm.
Note: 1. Valves may be removed for cleaning or replacement without disturbing the
sealed portion containing the intermediate fluid.
2. All Neptune 600 PVC pumps are furnished with the intermediate fluid installed
and factory sealed. Do not attempt to add additional fluid. Follow the instructions below only if
the head has lost fluid due to the diaphragm failure.
DISASSEMBLY OF LIQUID HEAD:
1.0.0 Shut pump off and disconnect suction and discharge piping. Remove drain plug in lower left
had side or gear box and drain hydraulic oil from gearbox.
1.0.1 Remove (12) 3/8-16 screws and remove steel plate and liquid head. Process liquid and
intermediate fluid will spill out when liquid head is removed.
1.0.2 Remove (1) 5/8-11 screws and remove intermediate plate. Some intermediate
fluid and some hydraulic oil will spill out when intermediate plate is removed.
1.0.3 All parts should be inspected for any deficiency or wear and replaced if necessary. Both
diaphragms should be replaced with new diaphragms.
1.0.4 To reassemble, reverse above procedure. Be certain that parts align properly and fill up hole
on intermediate plate facing up.
REFILLING INTERMEDIATE PLATE:
1.0.6 Remove fill plug in the top of intermediate plate.
1.0.7 Slowly pour contents of premeasured intermediate fluid into fill hole. Pour slowly and gently
rock pump to help air escape from chamber during filling.
1.0.8 Fill intermediate chamber with exactly 165ml of intermediate fluid. When the solution reaches
to of fill hole, install fill plug. Do not overfill the intermediate liquid chamber, collapse of the
diaphragm is not acceptable and could result in difficult start-up and in lost pump capacity.
1.0.9 Reinstall pump. Follow procedure in NETPUNE STANDARD OPERATING AND
INSTRUCTION MANUAL for initial pump start up.
1.0.10 Recommended Spare Parts for 600 PVC Head (addition to standard spare parts lists). It is
recommended that the following parts be kept in stock for a pump.
PART NUMBER DESCRIPTION QUANTITY
003014 Teflon Diaphragm 1
106693 Valve Seat “O” Ring 6
003080 Ball Seat 6
003172 Plate Gasket 2
003708 Backup Plate 1
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