3
GB
3.9 Maintenance Model 1 1/2“ and 2“, Bolted Version
3.9.1 Maintenance of Check Valve and O-Ring
. Flush and neutralize the pump to be certain all corrosives or hazardous materials are removed prior to any
maintenance. This procedure should always be followed when returning pumps for factory service also.
a.
Non-metallic pumps:
Remove the elbow to outer pumping chamber (8) band clamps (35). Suction check valve
seats and check balls (6, 7) are located inside of the bottom of the outer chamber (8). Gently remove and
inspect for excessive wear, pitting or other signs of degradation. Inspect valve seat o-rings (4). Replace if nec-
essary. Discharge check valves are located inside of the bottom of the discharge elbows (3). Repeat procedure
for inspection of discharge check valves.
b.
Metallic pumps:
To inspect the check valves, remove the cap screws (9) from manifold sections (,3).
Repeat procedure as described under point a. There are no manifold o-rings in the metallic pumps.
3.
Non-metallic pumps:
To inspect the manifold o-rings () remove the manifold band clamps (0) from each
manifold assembly. Inspect and replace o-rings () if necessary. Then reassemble, lightly tighten fasteners.
The check ball should fit into the curved portion of the valve seat and be facing upward when reinserted into
the valve seat location. Tighten all external fasteners to final torque requirement after pump is completely as-
sembled.
Caution!
When using pumps built with PTFE o-rings always replace with new PTFE o-rings, since the original o-rings
may not reseal the pump.
3.9.2 Maintenance of Diaphragm and Pilot Sleeve Assembly
4. To inspect diaphragms remove cap screws (6) and reinforcement bracket (5) from the outer pumping cham-
bers (8). If replacement is necessary due to abrasion or rupture unscrew the outer diaphragm plates (9).
Models that are built with PTFE elastomers will have a PTFE overlay (30) that faces the outer pumping chamber
(8) and a back-up diaphragm (3) on the air side of pump. Pumps without PTFE will contain only the back-up
diaphragms (3).
5. If a diaphragm has been ruptured and corrosive or viscous fluid has entered the air side of the pump, the
complete air system should be inspected. After removing diaphragms and inner diaphragm plate (33), and flat
washer (47) the pilot sleeve assembly (3, 4, 5, 4, 45, 48) and diaphragm rod assembly (34, 49) may be
removed by removing the retaining plates (46) (you may only need to remove one retaining plate) and pushing
the entire unit out through the bore in the intermediate (4). Diaphragm rod assembly must be unscrewed to
remove pilot sleeve.
Caution!
To aid in reassembly use a non-synthetic, petroleum based lubricating grease without EP additives.
Maintenance Model 1 1/2“ and 2“, Bolted Version
Summary of Contents for Size 1 - 1/4"
Page 49: ...49 GB 6 Performance Curves 6 1 Model 1 4 6 2 Model 3 8 Band Clamp Version...
Page 50: ...50 GB 6 4 Model 1 2 Bolted Version 6 3 Model 1 2 Band Clamp Version...
Page 51: ...51 GB 6 6 Model 1 Bolted Version 6 5 Model 1 Band Clamp Version...
Page 52: ...52 GB 6 8 Model 1 1 2 Bolted Version 6 7 Model 1 1 2 Band Clamp Version...
Page 53: ...53 GB 6 10 Model 2 Bolted Version 6 9 Model 2 Band Clamp Version...
Page 54: ...54 GB 6 11 Model 3 Bolted Version...
Page 56: ...56 GB...
Page 58: ...58 GB...
Page 59: ...59 GB...
