139‑3990 Pressure Reducing Solenoid Valve — 24V DC Pilot Control Valve

The 139‑3990 Pressure Reducing Solenoid Valve is a core electromechanical component for pilot‑control hydraulic circuits of heavy‑duty Caterpillar mining and construction machinery. Operating on 24V DC power, it precisely regulates hydraulic oil pressure and flow according to electronic control signals, ensuring stable and flexible operation of main hydraulic actuators and joystick systems.

1. Technical Specifications

2. Machine Compatibility

This heavy‑duty pilot solenoid valve is widely applied to large‑tonnage Caterpillar mining and construction equipment:

• CAT A‑Series Excavators: 315‑A, 315‑A L, 330‑A, 330‑A L, 350‑A, 350‑A L, 375‑A, 375‑A L

• Front‑End Shovel: 5080

• Forestry & Logging Machines: 330‑A FM

3. Key Features & Advantages

• Precise Pressure Modulation: Stable output pressure up to 3332 kPa ensures smooth joystick feedback and reliable pilot‑system operation.

• High‑Temperature‑Resistant Electromagnetic Coil: 24V coil structure resists continuous high‑frequency work cycles without signal drift or failure in hot hydraulic‑system environments.

• Fast‑Response Control: Precision‑matched plunger and valve seat deliver near‑instant opening‑closing action, improving machine maneuverability and control sensitivity.

• Mining‑Grade Rugged Structure: High‑precision machined valve body resists internal oil‑medium erosion and external severe vibration under heavy mining‑site working conditions.

For bulk wholesale, technical consultation and hydraulic‑system component solutions:

Xuzhou Sinoswift Import & Export Co., Ltd.
Contact: +86 13701956981
Email: [email protected]