Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 34)

33
Maintenance
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
Model for injection of boiler chemicals: PZ-31
* 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.
O-ring
(size: P12)
Ball stopper
Ball stopper
Check ball
Valve seat
Suction-side joint
Retaining ring
Valve seat
Nut
Packing
Air-release nozzle assembly*
Check ball
Spacer
O-ring
(size: P12)
Nut
Retaining ring
Discharge-side joint
Ball stopper
Check ball
Valve seat
Ball stopper
Check ball
Valve seat
Spacer
Head bolt
(cross-recessed
machine screws)
Pump head
Discharge-side joint assemb
ly
V
alv
e seat assemb
ly*
Suction-side joint assemb
ly
V
alv
e seat assemb
ly*
Air-release knob*
Model for injection of sodium hypochlorite: PZ-31/61/12-CL
■Liquid-end material: FEC (PP) ■Liquid-end material: CL
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