Product Overview
The POCLAIN KV-4/3-5KL-6-6L / B21354K is a robust 4-way, 3-position solenoid-actuated directional control valve engineered for demanding industrial hydraulic circuits. Manufactured to POCLAIN’s exacting standards, this valve directs pressurized fluid flow to dual-acting actuators, cylinders, and rotary motors, enabling precise extension, retraction, and hold functions within a hydraulic system. Its spool-type design ensures reliable shifting, minimal internal leakage, and consistent performance across a wide range of operating pressures and flow rates. The KV series is recognized for its durable construction, making it a preferred choice for mobile and stationary hydraulic applications where dependable directional control is critical.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Standard Directional Control Valve (Solenoid Actuated) |
| Model Designation | KV-4/3-5KL-6-6L / B21354K |
| Spool Configuration | 4-Way, 3-Position (4/3) |
| Actuation Type | Solenoid Pilot / Direct Solenoid |
| Operating Pressure | Standard Industrial Grade (Up to rated bar) |
| Mounting & Connection | Standard ISO / Manufacturer Interface |
| Seal Type | Nitrile (NBR) / Polyurethane (PU) – Compatible with Mineral Oil |
| Fluid Compatibility | Mineral-Based Hydraulic Oils (ISO VG 32–68) |
Engineering Features & Advantages
- Precision Spool Metering: The hardened, precision-ground spool delivers accurate flow control and repeatable shifting, minimizing pressure drop and ensuring smooth actuator response in both directions.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust solenoid coils and wear-resistant internal components that extend service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original POCLAIN OEM standards, ensuring drop-in installation without modification to existing manifolds or piping.
- Low Internal Leakage: Tight spool-to-bore clearances reduce bypass losses, improving system efficiency and maintaining actuator holding capability.
- Versatile Circuit Integration: The 4/3 configuration supports advanced functions such as cylinder extension, retraction, and neutral bypass, making it suitable for complex hydraulic control schemes.
Typical Industrial Applications
This POCLAIN solenoid directional control valve is widely deployed in heavy-duty industrial and mobile hydraulic systems, including plastic injection molding machines, metallurgical presses, construction and marine hydraulics, and CNC machine tools. It is equally suited for agricultural machinery, material handling equipment, and automated production lines where precise directional control and long-term reliability are essential.
PRODUCT IMAGES

POCLAIN KV-4/3-5KL-6-6L / B21354K Solenoid Directional Control Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine POCLAIN KV-4/3-5KL-6-6L / B21354K Solenoid Directional Control Valve. This French-made hydraulic component features a 4/3-way design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.