What does "Abrasion Resistant" (AR) mean for the 303088 valve?

AR indicates the valve assembly is intended for abrasive service — applications where the pumped fluid carries solids or abrasives. This is stated in the product name.

What does the 303088 valve assembly do?

It controls one-way flow in the pump's fluid end, opening on one stroke and closing on the other to direct flow. It is supplied as a complete assembly.

Is 303088 an OEM part?

It is an aftermarket replacement valve assembly supplied under part number 303088 to match the original by form and fit.

303088 Valve Assembly Complete, Abrasion Resistant

303088 Valve Assembly Complete, Abrasion Resistant — Valve Assembly aftermarket replacement part

The 303088 Valve Assembly Complete is a fluid-end valve assembly that controls one-way flow through a reciprocating pump — admitting fluid on the suction stroke and releasing it on the discharge stroke. As a complete assembly it includes the matched valve components for the valve position it serves. The "Abrasion Resistant" (AR) designation indicates it is intended for abrasive service. This is an aftermarket replacement part supplied under part number 303088 and ships at about 6.2 lb.

What it is

A fluid-end valve assembly controls one-way flow through the pump — a suction valve admits fluid on the intake stroke and a discharge valve releases it on the pressure stroke. It typically comprises the valve body, seat, spring and guide.

Specifications

Property	Value
Weight	6.20 lb (≈ 2.81 kg, converted)
Width	4.75 in / 12.1 cm
Height	10.8 cm
Depth	10.8 cm

Manufacturer technical notes

303088 Abrasion-Resistant Valve Assembly (SKU: 303088) API 7K-certified 20CrMnTi alloy steel forging (tensile strength ≥900MPa) with carburizing quenching (surface hardness HRC60-62), paired with polyurethane seal ring (ASTM D2240 hardness 90A), compatible with EMSCO/F-1300 mud pumps, salt spray tested 1000h corrosion-free, dynamic load durability 10⁷ cycles。

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing 303088.

FAQ

What does "Abrasion Resistant" (AR) mean for the 303088 valve?: AR indicates the valve assembly is intended for abrasive service — applications where the pumped fluid carries solids or abrasives. This is stated in the product name.
What does the 303088 valve assembly do?: It controls one-way flow in the pump's fluid end, opening on one stroke and closing on the other to direct flow. It is supplied as a complete assembly.
Is 303088 an OEM part?: It is an aftermarket replacement valve assembly supplied under part number 303088 to match the original by form and fit.

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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