Import Cartridge Directional Control Valve Long Life — Buy in wholesale FOB from Supplier in China

The Cartridge Directional Control Valve Long Life is a hydraulic cartridge designed for three‑way flow control in compact modules. Aak Industry Co., Ltd manufactures the valve spool from 20CrMo alloy steel, a material favoured for its high tensile strength and wear resistance. The machining process reserves a 0.25‑0.35 mm allowance before carburising, quenching and high‑temperature tempering, followed by low‑temperature cold treatment. These steps yield a surface hardness exceeding HRC 63 and eliminate residual austenite, which the supplier cites as key to the claimed two‑year service life.

In the hydraulic component market, spools of 20CrMo are typical for valves rated up to 35 MPa and operating temperatures from - 20 °C to 120 °C. Standard valve bodies for this class are cast iron or forged steel, with port connections ranging from 1/4″ to 1‑inch NPT. Typical flow coefficients (Cv) for three‑way cartridge valves fall between 5 and 25, depending on internal geometry. The valve’s design conforms to ISO 4413 pneumatic‑hydraulic circuit standards, providing predictable performance across varied system pressures.

OEMs in construction equipment, material handling, and agricultural machinery commonly specify this valve for its compact size and extended service interval. Aak Industry offers the product in bulk quantities, with sample deliveries possible on request, though exact MOQ and lead time must be confirmed directly with the supplier. Shipping is usually in wooden crates with individual units wrapped in anti‑corrosion film, and Incoterms such as FOB Ningbo are typical. Buyers should verify the heat‑treatment certificate and hardness test report before finalising purchase to ensure compliance with the two‑year lifespan claim.

Aak Industry Co., Ltd is located at Bona Business Building No. 456 Taikang Middle Road, Yinzhou, Ningbo, Zhejiang, China, postal code 315100. The company is listed under the “harbor” trust tier on the marketplace, indicating a verified business entity, though its response rate is currently recorded as 0 % and average response time is not available. The supplier states that it produces hydraulic cartridge directional control valves with a focus on extended spool life.

In its product narrative the company highlights the use of 20CrMo alloy steel for the valve spool and a multi‑stage heat‑treatment process that includes carburising, quenching, high‑temperature tempering and low‑temperature cold treatment to achieve hardness above HRC 63. No additional certifications, production capacity, or client references are disclosed in the listing, so buyers should request supporting documents directly.