Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of 4we10y31b solenoid valve rexroth replacement in China, also supports customized service. If you're going to wholesale high quality 4we10y31b solenoid valve rexroth replacement made in China, welcome to get pricelist from our factory.
4WE10Y31B Solenoid Valve – Rexroth Replacement
Reliable Directional Control for Medium and Low End Hydraulic Systems
We have been making hydraulic valves in Shijiazhuang since 1988. This particular model – the 4WE10Y31B solenoid valve – started as a direct mechanical copy of the Rexroth NG10 series. Over the years we changed several internal details based on customer complaints about cheap alternatives: spool sticking, coil burnout, and leakage after six months. This page explains what our current version does differently.
It is a 4‑way, 3‑position directional valve with soft‑shift solenoids (Y31B code), and match the Rexroth specification – you can replace a worn original Rexroth replacement without changing hoses or mounting plates.
Features & Benefits – Why Users Choose This Valve
We use a Class H insulation coil (180°C) and a moisture‑resistant epoxy encapsulation. The solenoid tube is stainless steel, not plated carbon steel – this prevents internal rust that often kills cheap alternatives.
Direct drop‑in replacement
The mounting surface, port pattern, and overall dimensions match Rexroth 4WE10Y31B. No adapter plate or piping change is required.
Clear visual indication
Each 4WE10Y31B solenoid valve has a manual override with a red position indicator and a LED pilot light on the connector. Operators can confirm shifting at a glance.
Stable shifting with dirty oil
The spool is DLC‑coated (diamond‑like carbon) on the critical lands. Combined with a slightly enlarged return spring guide, the valve tolerates oil cleanliness up to ISO 20/18/15 without noticeable spool sticking.
Technical Details & Function
This is a 4‑way, 3‑position directional valve with spring return to center.
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The "Y31B" designation means
Y – soft‑shift solenoid (reduces hydraulic shock in fast cycles)
31 – standard DC 24 V coil, 30 W holding power, with surge suppression
B – NBR seals for mineral oil (optional FKM available for HFD fluids)
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Specification
Flow rate: up to 120 L/min (with ∆p 5 bar typical).
Maximum pressure: 315 bar on ports P, A, B; 210 bar on port T. Leakage at 210 bar: ≤ 15 ml/min – on par with mid‑range European brands.
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Features
The valve body is cast from HT250 gray iron and stress‑relieved before machining. All critical bores are honed to Ra 0.2 µm.
We measure every unit on a computer‑controlled test rig that simulates load cycles.
Company Background – Who Stands Behind This Valve
Founded in 1988, Shijiazhuang Laiye Import & Export Trading Co., Ltd (belonging to Hebei Wendefu Hydraulic Technology Co., Ltd.) is a high-tech enterprise focusing on R&D, production and sales of hydraulic valves, directional valves, pressure valves, flow valves, accessories, and special components. The company has strong technical strength and processing capacity, having hired senior industry experts as consultants. After decades of development, it now owns a high-quality product development and production team, along with rich customer service experience. Its products closely rely on talent and technical advantages, selling well in Russia, Europe, the Middle East, South America, Asia and other markets – earning unanimous recognition from customers. This cost effective hydraulic valve line is one of their most requested Rexroth alternatives for global buyers.
Ready to test a sample?
Order one piece today – you will receive the test report PDF by email. For orders of 10+ pieces, we add a free manual override tool. Click "Get Latest Price" or send your PO to our WhatsApp. Stock available for 24 V DC version.
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