Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 32)

31
Maintenance
Pump head
Head bolt
(cross-recessed
machine screws)
O-ring
(size: P14)
Nut
Retaining ring
Ball stopper
Discharge-side joint
Check ball
Valve seat
Ball stopper
Check ball
Valve seat
O-ring
(size: P14)
Ball stopper
Check ball
Valve seat
Suction-side joint
Retaining ring
Valve seat
Nut
Ball stopper
Check ball
Relief valve*
Air-release nozzle assembly*
Discharge-side joint assemb
ly
V
alv
e seat assemb
ly*
Suction-side joint assemb
ly
V
alv
e seat assemb
ly*
Suction-side joint
Tube fitting
Ball stopper
Check ball
Valve seat
Ball stopper
Check ball
Valve seat
Ball stopper
Check ball
Valve seat
Valve seat
Ball stopper
Check ball
Discharge-side joint
Tube fitting
Pump head
Relief valve*
Air-release nozzle assembly*
Head bolt
(cross-recessed
machine screws)
O-ring
(size: P14)
O-ring
(size: P14)
Discharge-side joint assemb
ly
V
alv
e seat assemb
ly*
Suction-side joint assemb
ly
V
alv
e seat assemb
ly*
Replacing the valve seats and check balls
IMPORTANT
• Install the parts in the correct sequence and correct directions.
• Pay special attention to the sequence and directions for the joints and valve seat assemblies.
• Check the O-ring, check balls and valve seats for damage and dirt.
Model for injection of general chemicals: PZ-31/61/12
* Consumables that must be replaced at periodic intervals. For further details, refer to the “Consumables” on page 51 to 52.
✽ Also available is “Pump head assembly” containing all of the above parts.
■Liquid-end material: VEC/VFC ■Liquid-end material: FEC/FFC
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