Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of hydraulic solenoid valve 4weh25 series in China, also supports customized service. If you're going to wholesale high quality hydraulic solenoid valve 4weh25 series made in China, welcome to get pricelist from our factory.
Product Overview
The 4WEH25 Series hydraulic solenoid valve is a pilot-operated directional valve designed for high-flow hydraulic systems. With a nominal size of 25 mm (NG25), it handles flow rates up to 500 L/min and pressures up to 350 bar (5,076 psi). Whether you need to start, stop, or change the direction of actuator movement, this valve delivers reliable, instantaneous response.
Unlike standard direct-acting valves, the 4WEH25 uses a pilot spool to shift the main spool – enabling smooth switching even under high pressure and large flow. Every unit is machined from high-strength cast iron, with hardened and ground spools, plus NBR/FKM seals compatible with mineral oils and environmentally friendly fluids.
Products Description
Technical Specifications
| Parameter | Value |
|---|---|
| Nominal size | 25 mm (NG25) |
| Max operating pressure | 350 bar (port P, A, B) |
| Max flow rate | 500 L/min (with proper spool) |
| Pilot pressure range | 10 – 350 bar |
| Solenoid voltage | 12V DC, 24V DC, 110V AC, 220V AC (others on request) |
| Spool types | 3-position (4/3), 2-position (4/2) |
| Switching time | ON: 40-60 ms / OFF: 30-50 ms |
| Protection class | IP65 (standard), IP67 optional |
| Fluid temperature | -20°C to +80°C |
| Viscosity range | 15 – 400 mm²/s |
Materials & Construction
Valve housing: High-grade nodular cast iron (QT500-7) – resistant to shock and fatigue.
Main spool & pilot spool: Case-hardened alloy steel (20CrMnTi), precision ground to 0.4 µm Ra.
Seals: NBR (standard) or FKM (for high temp / phosphate esters).
Solenoid tube: Stainless steel, welded construction to prevent leakage.
Paint: Epoxy coating, corrosion-resistant up to 500 hours salt spray.
Applications – Where This Valve Excels
Founded in 1988, Shijiazhuang Laiye Import & Export Trading Co., Ltd (part of Hebei Wendefu Hydraulic Technology Co., Ltd.) is a high-tech enterprise focusing on R&D, production, and sales of hydraulic directional valves, pressure valves, flow valves, and special components. We have senior industry experts as consultants and a dedicated team of over 200 production managers and technicians. Every year, we ship more than 10,000 containers of precision hydraulic products to over 20 countries – Russia, Europe, Middle East, South America, Asia, and beyond.
Professional team
Production Time: 10–15 days
40+
Years in business
200+
Employee
10000+
Container
20+
Countries
FAQ – Frequently Asked Questions
What is the difference between 4WEH25 and a direct-acting solenoid valve?
The 4WEH25 is pilot-operated, meaning a small pilot valve shifts the main spool. This allows it to handle much higher flow (up to 500 L/min) than direct-acting valves (typically <80 L/min) while keeping solenoid size and power consumption low.
Can you provide OEM or custom spool configurations?
Yes. If you provide your drawing and specific flow/pressure requirements, we can manufacture spools with special metering notches or asymmetric switching timing. Minimum order quantity for OEM spools: 50 pieces.
What is the warranty period?
12 months against the Bill of Lading date. We also offer extended warranty (up to 24 months) for bulk orders with documented maintenance records.
How long does it take to process an order for the 4WEH25 series?
For stock items (standard spool, 24V DC coil), 2-3 business days. For non-stock or OEM configurations, 10-14 business days.
One-stop Hydraulic Valve Factory in China
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