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Danfoss / Eaton Integrated Hydraulics 4SK904S

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Description & Features

Rated to 350 bar (5000 psi) with flow capacity up to 227 L/min (60 USgpm), the Danfoss / Eaton Integrated Hydraulics 4SK904S is a poppet-style check valve built for demanding mobile and industrial hydraulic circuits. Low spring settings support high operational efficiency across a wide range of flow conditions.

Part of the Vickers 4SK90 series, this valve is suited for use in harvesters, refuse haulers, and other mobile equipment where reliable non-return flow control is required. Its compact design and robust pressure rating make it a practical fit for both mobile and stationary industrial hydraulic systems.

SKU: 401AA00018A

Supplier Part Number (MPN): 401AA00018A

Specifications

Actuator Type
Pilot Operated
Connection Type
UNS
Dimensions
4-1/2 in L x 1-1/4 in W x 1-1/4 in H
Mounting Type
Screw-In
Nominal Size
1 in
Number of Ports/Ways
3-Way
Operator Type
Pilot Operated
Packing Material
Nitrile
Pilot Ratio
4:1
Seal Material
Nitrile
Seat Material
Nitrile
Series
4SK90 Series
Softgoods Material
Nitrile
Style
Poppet
Thread Size
1-14S

Product Questions & Answers (1)

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Question by: Rod M on Feb 7, 2026, 1:58 PM
How much flow can this handle, and what's the pressure rating? Just wanna make sure it'll work for my setup.
Answer by: Customer Support on Feb 8, 2026, 6:04 PM
This valve is rated up to 350 bar (5000 psi) and can handle a flow capacity of up to 227 L/min (60 USgpm). So, it should hold up well for systems needing that kind of performance.

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