Where does this washer sit in the pump?

It seats within the piston assembly on the rod in the fluid end, as part of holding the piston in its installed position during reciprocation.

Which part number does this replace?

It is an aftermarket replacement for FMC Bean SKU 1207289. The brand and number are used for cross-reference only.

Piston Washer Delrin for FMC Bean L0618/L0918/L1118/L1618

Piston Washer Delrin for FMC Bean L0618/L0918/L1118/L1618 — Piston aftermarket replacement part

This Delrin Piston Washer is a fluid-end part for FMC Bean L-series reciprocating pumps. It seats within the piston assembly on the rod as part of holding the piston in its installed position while it reciprocates inside the cylinder liner. It fits the FMC Bean L0618, L0618COMP, L0618HV, L0918, L0918 HD, L0918BCD, L1118 and L1618 pumps, as well as the BEAN 420, and weighs about 0.02 lb. This is an aftermarket replacement part offered as a substitute for FMC Bean SKU 1207289; the brand and part number are listed for identification and cross-reference only and do not indicate OEM manufacture.

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 420
L0618
L0618COMP
L0618HV
L0918
L0918 HD
L0918BCD
L1118
L1618

Specifications

Property	Value
Weight	0.02 lb (≈ 0.01 kg, converted)
Width	1.50 in / 3.8 cm
Height	1.50 in / 3.8 cm
Depth	0.50 in / 1.3 cm

Manufacturer technical notes

Piston Washer Delrin for FMC Bean L0618/L0918/L1118/L1618 (SKU:1207289) Manufactured from DuPont Delrin® acetal homopolymer (ASTM D4181), with tensile strength ≥70MPa and heat deflection temperature 121°C. Operating temp -40°C~100°C. API 7K compliant for mud pump fluid ends. Friction coefficient ≤0.15, abrasion resistance 30% higher than Nylon 66. UNF 3A thread accuracy, salt spray tested >1000hrs corrosion-free.

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing FMC Bean 1207289.

FAQ

Which pumps does this piston washer fit?: It fits FMC Bean L0618, L0618COMP, L0618HV, L0918, L0918 HD, L0918BCD, L1118 and L1618 pumps, as well as the BEAN 420.
Where does this washer sit in the pump?: It seats within the piston assembly on the rod in the fluid end, as part of holding the piston in its installed position during reciprocation.
Which part number does this replace?: It is an aftermarket replacement for FMC Bean SKU 1207289. The brand and number are used for cross-reference only.

Related parts

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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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