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Danfoss / Eaton Integrated Hydraulics 4CK901S3

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Description & Features

Designed for demanding mobile and industrial environments, the Danfoss / Eaton Integrated Hydraulics 4CK901S3 is a poppet-style check valve from the Vickers 4CK90 Series, rated for pressures up to 350 bar (5,000 psi) with a flow capacity of 90 litres per minute.

Low spring settings contribute to high operational efficiency across a range of duty cycles. Typical applications include harvesters, refuse haulers, and broader mobile hydraulic systems where reliable non-return flow control is required.

Supplied under the Eaton Char-Lynn brand, now operating as Danfoss Power Solutions, this valve is classified within the SICV check valve range and is available as a single unit.

SKU: 401AA00004A

Supplier Part Number (MPN): 401AA00004A

Alternate Part Numbers: 4CK901S3, C1KK25

Specifications

Brand
Char-Lynn®
Actuator Type
Pilot Operated
Ball Material
Steel
Body Material
Steel
Connection Type
BSP
Dimensions
2.73 in L x 1.259 in W x 1.259 in H
Disc Material
Steel
Mounting Type
Screw-In
Nominal Size
1/2 in
Operator Type
Pilot Operated
Packing Material
Nitrile
Pilot Ratio
4:1
Seal Material
Nitrile
Seat Material
Steel
Series
4CK90 Series
Softgoods Material
Nitrile
Style
Poppet

Product Questions & Answers (1)

Question by: Larry A on Aug 3, 2025, 1:28 PM
got a mobile rig that needs a check valve, what kind of valve is the 4CK901S3 anyway
Answer by: Customer Support on Aug 4, 2025, 7:51 PM
Acts as a poppet-style check valve, so it lets hydraulic flow go one direction and blocks it the other way. It’s part of the Vickers by Danfoss and Eaton 4CK90 series.

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