2P40 | Monoblock Hydraulic Valve 250bar 40L/min 2 Spool

Product Overview

The 1P80, 2P80, 3P80, and 4P80 are P80 series monoblock directional control valves, featuring high-strength cast iron integral construction with a rated flow of 80 L/min and maximum operating pressure up to 315 bar. The monoblock casting eliminates leak paths between sections found in modular valve designs. The P80 series delivers exceptional high-pressure, high-flow performance for medium-to-high pressure mobile hydraulic systems.

The P80 series supports multiple control options—manual, pneumatic, electro-hydraulic proportional, and solenoid control—to accommodate diverse equipment requirements. Optional internal relief valves and check valves enable system pressure adjustment and anti-reverse flow protection. Spool functions (O, Y, A, P, etc.) can be combined flexibly per customer requirements. Parallel circuit design supports simultaneous or sequential multi-actuator operation.

As original P80 series monoblock directional valves, these products offer complete interchangeability within the same series and size, requiring no modifications to mounting interfaces or piping layouts.

Model Naming Breakdown:

• 1/2/3/4 – Number of spools/sections

• P – Parallel circuit

• 80 – Rated flow 80 L/min

Technical Specifications

P80 Series Common Specifications:

• Brand: CHIEF / HANJIU / THM / Badestnost / Generic P80 Series

• Product Type: Monoblock Directional Control Valve

• Body Construction: Monoblock Cast Iron

• Nominal Flow Rate: 80 L/min (21 GPM)

• Maximum Operating Pressure (P Port): 250–315 bar (3626–4568 psi)

• A/B Port Pressure: 300 bar

• T Port Back Pressure: 50 bar

• Circuit Type: Parallel Circuit

• Spool Functions: O, Y, A, P, etc. (configurable)

• Control Types: Manual, Pneumatic, Electro-hydraulic, Solenoid, etc.

• Port Sizes: P/T/N — G1/2″ BSP, A/B — G3/8″ BSP

• Temperature Range: -40°C to +80°C

• Hydraulic Fluid: Mineral-based hydraulic oil

• Recommended Filtration: ≤10 μm

• Body Material: High-strength cast iron

1P80 Specifications:

• Model: 1P80

• Number of Spools: 1

• Weight: Approx. 3.9 kg (Reference only)

2P80 Specifications:

• Model: 2P80

• Number of Spools: 2

• Weight: Approx. 5.5–6.5 kg (Reference only)

3P80 Specifications:

• Model: 3P80

• Number of Spools: 3

• Weight: Approx. 7.0–8.0 kg (Reference only)

4P80 Specifications:

• Model: 4P80

• Number of Spools: 4

• Weight: Approx. 8.5–9.5 kg (Reference only)

Key Technical Advantages

1. Monoblock Cast Iron Construction — Zero Leak Paths

High-strength cast iron integral casting eliminates sealing joints and potential leak paths found in sectional valve designs. The monoblock structure maintains excellent sealing performance under high-pressure shock and vibration. Corrosion-resistant surface treatment ensures durability in harsh environments.

2. High-Pressure High-Flow Performance

The P80 series delivers an exceptional combination of 80 L/min rated flow and up to 315 bar maximum operating pressure in a monoblock valve design. This performance places it at the forefront of monoblock directional valves in its class, suitable for demanding medium-to-high pressure mobile hydraulic systems.

3. Parallel Circuit Design for Multi-Actuator Coordination

The P80 series employs parallel circuit design, supporting simultaneous or sequential multi-actuator operation. Each spool independently controls its corresponding actuator without interference—particularly suitable for complex systems requiring coordinated hydraulic cylinder or motor operation. Supports flexible combinations of 1–6 spools.

4. Wide Range of Control Options and Spool Functions

Supports manual, pneumatic, electro-hydraulic proportional, and solenoid control options. Spool functions (O, Y, A, P, etc.) can be flexibly combined per application requirements. Optional internal relief valves (system pressure adjustment) and check valves (anti-return flow) accommodate diverse operating conditions.

5. Precision Machining for Extended Service Life

Spool working surfaces are precision-ground and hard chrome-plated for excellent wear resistance and long service life. Specially designed sealing structure delivers superior sealing performance, minimizing both internal and external leakage. Compact valve body design suits space-constrained installations.

Application Areas

• Tractors and Agricultural Machinery — Implement lift, PTO control, and hydraulic output control

• Loaders and Construction Equipment — Bucket, boom, and attachment hydraulic directional control

• Forklifts and Material Handling — Mast lift, tilt, and attachment control

• Truck-Mounted Cranes and Aerial Work Platforms — Outrigger, boom, and swing control

• Municipal Sanitation Equipment — Garbage trucks and street sweeper hydraulic systems

• Mining and Drilling Equipment — Directional control for heavy-duty hydraulic systems

• Concrete Mixer Trucks — Mixing drum hydraulic drive control

Expert Maintenance Tips

1. Installation Guidelines

• Thoroughly clean the valve body and port connections before installation to prevent foreign particles from entering and causing spool sticking or seal damage.

• Verify correct port connections: P port to pump, T port to tank, A/B ports to actuators.

• Tighten mounting bolts evenly to the specified torque to ensure proper sealing between the valve body and mounting surface.

• If adding hydraulic locks at A and B ports, complete configuration prior to installation.

2. Hydraulic Fluid Cleanliness

• Recommended filtration: ≤10 μm.

• Use mineral-based hydraulic oil meeting specifications, viscosity range 10–400 cSt.

• Operating temperature range: -40°C to +80°C.

3. Internal Relief Valve Adjustment

• P80 series valve bodies may include optional internal relief valves for system pressure adjustment.

• Pressure adjustment should be performed under system operating conditions, gradually adjusting to the required pressure value.

• Factory settings vary by manufacturer (commonly 250 bar)—reconfirm settings after installation based on actual operating conditions.

4. Periodic Maintenance Inspection

• Inspect the valve body for external oil leakage every 1,000 operating hours or at least annually.

• Check each spool handle/solenoid for smooth and responsive operation.

• If spool sticking or response lag is observed, first check system fluid cleanliness and clean the spool if necessary.