Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of s series hydraulic valves factory direct in China, also supports customized service. If you're going to wholesale high quality s series hydraulic valves factory direct made in China, welcome to get pricelist from our factory.
S Series Hydraulic Valves – Factory Direct from Onederful® Hydraulic
Precision-engineered for reliable flow control in demanding hydraulic systems. S Series Hydraulic Valves combine robust materials, compact design, and smooth spool shifting to give you consistent performance-whether you're operating construction equipment or industrial machinery.
Technical Specifications at a Glance
| Parameter | Value |
|---|---|
| Rated pressure | 315 bar (max 350 bar) |
| Rated flow | 60 – 160 L/min (depending on size) |
| Working temperature | -20°C to +80°C |
| Medium | Mineral oil (ISO VG 32/46/68) |
| Spool stroke | 4.5 – 8 mm |
| Leakage | ≤ 0.3 ml/min at rated pressure |
How It Works – Spool Shifting & Oil Circuit Control
The S Series Hydraulic Valves use a precision-ground hardened spool moving inside a nickel-plated bore. When you apply pilot pressure (or manually shift the lever), the spool changes position, opening or closing internal flow paths. This directs oil to extend or retract a cylinder, rotate a motor, or bypass flow to tank. Three common shifting options are available: manual lever, hydraulic pilot, and solenoid-operated (12V/24V DC).
Inside the valve body, carefully designed metering notches ensure smooth acceleration and deceleration of actuators-eliminating harsh starts or stops. The oil circuit control function supports directional, pressure, and flow control in one integrated unit.
Material & Construction
Each valve is assembled in a dust-free workshop and tested with real hydraulic oil before leaving our factory.
Body
High-strength cast iron (HT300) or ductile iron, anti-corrosion treated
Spool
20CrMnTi steel, carburized and hardened to HRC 58–62
Seals
NBR or FKM (for high-temperature fluids)
Springs
High-cycle fatigue-tested, over 1 million cycles
why choose us
why choose our products
No middleman markup – You pay the production price
Customization ready – Port threads, spool types, and handle configurations
Lead time – 2–3 days for in-stock items; 10–14 days for custom orders
Global shipping – Sea, air, or express (DHL/FedEx/UPS)
Certifications
Company profile
Founded in 1988, Shijiazhuang Laiye Import & Export Trading Co., Ltd (a subsidiary of Hebei Wendefu Hydraulic Technology Co., Ltd) has spent over 35 years focusing on pressure valve components. With a 200+ professional team, we ship more than 10,000 containers annually to 20+ countries. Every batch undergoes at least 10 inspection procedures before shipment.
One-stop Hydraulic Valve Factory in China
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