What does this retainer do?

It carries and holds the piston in the fluid end, keeping the piston assembly located on its rod as the pump reciprocates.

What is the interchange reference for this part?

It is an aftermarket replacement that interchanges with FMC Bean part number 1216753; the brand and number are listed for identification only.

Delrin Piston Retainer for FMC Bean L1122/L1622/W1122

Delrin Piston Retainer for FMC Bean L1122/L1622/W1122 — Piston aftermarket replacement part

This Delrin piston retainer holds the piston assembly in its installed position within the fluid end of FMC Bean L11, L16 and W11 series pumps. It fits the BEAN 435, L1122, L1122D, L1622, L1622HV, R660, W1122 and W1122BCD models and serves as an aftermarket replacement for FMC Bean part number 1216753.

What it is

A pump piston transmits force from the power end to the pumped fluid inside the cylinder liner. It carries the sealing element and reciprocates within the liner bore on every stroke.

Pump compatibility

BEAN 435
L1122
L1122D
L1622
L1622HV
R660
W1122
W1122BCD

Specifications

Property	Value
Weight	0.03 lb (≈ 0.01 kg, converted)
Width	5.1 cm
Height	5.1 cm
Depth	1.3 cm

Manufacturer technical notes

Delrin Piston Retainer (Model: L1122/L1622/W1122), manufactured from acetal copolymer (POM-C) via precision injection molding with Shore hardness D78 and temperature resistance -40°C to 120°C, compatible with FMC BEAN L1122/W1122 series mud pumps. API 7K certified with 30% enhanced self-lubrication, tensile strength ≥62MPa, designed for oil rig high-pressure (≤1000psi) abrasion-resistant applications.

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing FMC Bean 1216753.

FAQ

Which pumps does this piston retainer fit?: It fits FMC Bean BEAN 435, L1122, L1122D, L1622, L1622HV, R660, W1122 and W1122BCD pumps.
What does this retainer do?: It carries and holds the piston in the fluid end, keeping the piston assembly located on its rod as the pump reciprocates.
What is the interchange reference for this part?: It is an aftermarket replacement that interchanges with FMC Bean part number 1216753; the brand and number are listed for identification only.

Related parts

See all Piston →

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.

Need a quote or part lookup? Contact our team.