Model 68/8 Waterproof and wear-resistant NBR FKM Rubber Membrane Widely Used

Model 68/8 Waterproof and wear-resistant NBR FKM Rubber Membrane Widely Used

This listing covers replacement rubber membranes for diaphragm pumps. Hydraulic accumulator diaphragms require a separately confirmed design and application. Made from high-performance elastomer materials such as NBR (Nitrile Rubber) and FKM (Fluorocarbon Rubber), its fluid compatibility and flexing performance depend on the selected compound, diaphragm geometry and operating conditions. Original pump-model references include AR40, AR70 and D30; confirm fit for each exact pump. The part references below are separate range options, with dimensions explicitly identified only where stated:

620080

550190

1800 0012 00

1040081

180034

2240080

550080

0904.009

1800/88

68/8(ID*OD*Height : 10mm*120mm*7mm)

We also accept custom orders. If you have any water pump gasket needs, please feel free to contact us. We will provide you with the best factory price, especially for large quantities.

68/8 Pump Diaphragm: 10 mm ID, 120 mm OD and 7 mm Height Reference

The original detail explicitly identifies the 68/8 dimensions as inside diameter 10 mm, outside diameter 120 mm and height 7 mm. Use these as the listed reference dimensions and confirm tolerances on the approved drawing. Overall height is not necessarily the membrane wall thickness.

Compare the clamping rim, centre fixing and formed profile with the existing pump diaphragm. The other numbers on this page are separate part references; do not select a replacement from weight or visual similarity alone. Confirm the exact pump manufacturer and model, together with any reinforcement or bonded component required by the design.

Specify NBR or FKM compound for the pumped fluid, additives, operating temperature and flexing duty. Agree sample installation and dimensional inspection before repeat orders. The original 70 g entry is a weight reference, while endurance and differential-pressure limits require the approved diaphragm and pump specification.