ChangJia Hydraulic Solenoid Valve Factory​ Hydraulic Solenoid Valve Factory​ Manufacturer

Product Overview

- ChangJia hydraulic solenoid valve factory produces direct‑actuated proportional directional valves (type 4WRA) for controlling both direction and flow of hydraulic fluid. Available in sizes 6 and 10, the valves support subplate mounting, come as 3‑position (two solenoids) or 2‑position (one solenoid) versions, and are supplied as valve + matched electronic control.

Product Features

- Direct‑operated proportional solenoids with spring‑centred control spool and progressive V‑groove flow control

- Subplate mounting and low pressure drop across control lands

- Open‑loop proportional control of direction and flow (3‑position and 2‑position variants)

- Key ratings: up to 31.5 MPa (main ports), flows ≈43 L/min (size 6) and ≈95 L/min (size 10), viscosity range 3.8–380 mm²/s, temperature range -30 to +80 °C

- Electrical: 24 V DC nominal, solenoid current ~1.5 A, IP65 insulation

Product Value

- Precise, proportional control of hydraulic direction and flow for smoother machine operation and better process control

- Integrated supply of valve and electronic control simplifies sourcing and system integration

- Robust design and controlled manufacturing deliver reliability and consistent performance across demanding operating conditions

Product Advantages

- High precision: low hysteresis (

- Durable and versatile: wide viscosity and temperature ranges, IP65 protection, compatible with both mineral oil and phosphate‑ester fluids (seal dependent)

- Reduced system losses thanks to low pressure drop design

- Backed by ChangJia’s quality checks, experienced management and in‑house production capacity—plus availability of matched amplifiers for simplified commissioning

Application Scenarios

- Industrial machinery and light industry automation

- Metallurgy and mining equipment

- Aerospace/space‑flight systems and other high‑reliability sectors

- Any hydraulic system requiring proportional direction and flow control with subplate mounting and compact integrated valve/electronics solutions