Which pumps does this piston cup kit fit?

It fits FMC Bean 435, W1122 and W1122BCD reciprocating pumps.

What does "standard service" mean here?

It denotes a general-duty cup configuration, as distinct from cups designated for abrasive or solids-laden service.

This is an aftermarket replacement supplied to match FMC Bean part 5256690; the brand and part number are listed for identification and cross-reference only, not to claim OEM manufacture.

Piston Cup Kit Standard Service Neoprene for FMC Bean W1122

Piston Cup Kit Standard Service Neoprene for FMC Bean W1122 — Piston Cup aftermarket replacement part

This is a Neoprene piston cup kit (standard service) for the fluid end of FMC Bean reciprocating pumps. The piston cup is the flexible sealing element fitted to the piston; it seals against the cylinder liner bore as the piston reciprocates and is a routine wear item that directly affects volumetric efficiency. The "standard service" label denotes a general-duty cup configuration. It fits BEAN 435, W1122 and W1122BCD pumps and weighs about 0.53 lb.

What it is

A piston cup is the flexible sealing element fitted to the piston in the fluid end. It maintains the seal against the cylinder liner bore as the piston reciprocates, so wear here directly affects volumetric efficiency.

Pump compatibility

BEAN 435
W1122
W1122BCD

Specifications

Property	Value
Weight	0.53 lb (≈ 0.24 kg, converted)
Width	7.00 in / 17.8 cm
Height	4.00 in / 10.2 cm
Depth	2.50 in / 6.4 cm

Manufacturer technical notes

Neoprene Piston Cup Kit for FMC Bean W1122 (SKU 5256690). Nylon-reinforced Neoprene. 8,000PSI/120℃ rated - cost-effective solution for clean/low-abrasion service.

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing FMC Bean 5256690.

FAQ

Which pumps does this piston cup kit fit?: It fits FMC Bean 435, W1122 and W1122BCD reciprocating pumps.
What does "standard service" mean here?: It denotes a general-duty cup configuration, as distinct from cups designated for abrasive or solids-laden service.
Is this an OEM part?: This is an aftermarket replacement supplied to match FMC Bean part 5256690; the brand and part number are listed for identification and cross-reference only, not to claim OEM manufacture.

Related parts

See all Piston Cup →

All brand names, model numbers and part numbers are used for identification and cross-reference only and do not imply original-equipment manufacture. This is an aftermarket replacement part.

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