Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of 2p40 hydraulic valve two levers in China, also supports customized service. If you're going to wholesale high quality 2p40 hydraulic valve two levers made in China, welcome to get pricelist from our factory.
Product Information
The 2P40 is a monoblock valve - one solid piece of iron. No sections bolted together. No seals between sections because there are no sections.
Two levers. Two spools. 40 L/min.
Two functions in one compact package. That's the difference. Most monoblock valves come with one spool. Two is what forklifts need - tilt and lift. Two is what small loaders need - boom and bucket. Two functions cover a lot of equipment.
It's a monoblock, so what you order is what you get. No adding spools later. But for equipment with fixed functions - and a lot of equipment fits that description - monoblock makes more sense than paying for sectional flexibility you'll never use.
For equipment that needs two functions in a compact package, the 2P40 Hydraulic Valve Two Levers is a straightforward choice.
How Flow Sharing Works
Both valves use an open-center parallel circuit. When all levers are in neutral, pump flow returns to tank. No pressure builds. No heat is generated by relief flow.
When two levers are moved at the same time, both functions operate. The parallel circuit splits the flow between the active sections. The function with the lighter load gets more flow. The function with the heavier load gets less.
This is normal behavior for a parallel circuit. It is not a defect. If the operator is lifting a heavy load and steering at the same time, the steering will get more flow because it requires less pressure. The lift will slow down. If the machine needs both functions to move at the same speed regardless of load, a different circuit type is required. Neither the 2P40 nor the 3P40 provides load-independent flow sharing.
Flow Sharing in Parallel Circuits
The 3P40 uses an open-center parallel circuit. When all levers are in neutral, pump flow returns to tank. No pressure builds. No heat is generated by relief flow.
When one lever is moved, oil goes to that actuator. When two levers are moved at the same time, both functions operate. The parallel circuit splits the flow between the active sections. The function with the lighter load receives more flow. The function with the heavier load receives less.
This behavior is normal. It is not a defect. If you are lifting a heavy load and steering at the same time, the steering will get more flow because it requires less pressure. The lift will slow down. If you need both functions to move at the same speed regardless of load, a different circuit type is required. The 3P40 does not provide load-independent flow sharing.
Specifications
| Parameter | Value |
|---|---|
| Valve Type | Monoblock Directional Valve |
| Number of Spools | 2 |
| Nominal Flow | 40 L/min |
| Control Method | Manual lever |
| Spool Return | Spring-centered |
Options & Customization
Lever style: standard or custom
Spool functions: various options available
Valve marking, packaging, shipping marks - all customizable for OEM orders
Installation Checklist for Monoblock Valves
Mounting surface must be flat and clean. Any burr or debris can prevent the valve from seating properly and cause external leakage.
Tighten the mounting bolts evenly. Use a torque wrench. Uneven torque can distort the monoblock body. When the body distorts, the spools can bind in their bores. This is one of the most common installation errors.
Flush the hydraulic lines before connecting them. Debris left in the lines will travel into the valve and cause spool sticking or seal damage.
Fill the valve with clean hydraulic oil before start-up. Do not run the pump dry.
Start at low pressure. Idle for two to three minutes. Cycle each spool through its full range several times. This purges air from the circuit.
Check for external leakage at the mounting face and at the port connections. A small weep at the mounting face usually indicates an uneven mounting surface or a damaged O-ring.
Spring Return and Lever Feel
Each spool is spring-centered. When the operator releases the lever, the spring returns the spool to neutral. This is a safety feature. If the lever does not return, the function will continue to operate.
If a lever feels stiff or does not return smoothly, check for debris in the spool bore. Remove the end cap and inspect the spring. A broken spring will prevent the spool from centering. Replace the spring if damaged.
Do not adjust the spring tension. The spring is matched to the spool and bore. Changing the tension can affect centering and response.
Brand Quality Service
About the Manufacturer
Both the 2P40 and the 3P40 are produced by Shijiazhuang Laiye Import & Export Trading Co., Ltd., part of Hebei Onederful® Hydraulic Technology Co., Ltd. The company was founded in 1988 and has more than 35 years of experience in pressure valve components. For full company information, visit About Us.
Our Certificate
Production Process
Raw Material Inspection
Iron castings and steel arrive with mill certificates. We verify each batch through spectral analysis for material composition and inspect for internal defects. Any material that doesn't meet spec gets rejected at the door.
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Precision Machining
Each valve body goes to the CNC machining center. The 2P40 is a monoblock valve - the entire body is machined from a single casting in one setup. All spool bores, mounting surfaces, and porting are completed to micron-level tolerances.
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Heat Treatment
Once machined, the bodies go through heat treatment. This relieves internal stress from the cutting process, improves wear resistance, and locks in dimensional stability so the valve holds its geometry over years of use.
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Spool Grinding
Each spool is precision-ground to final dimensions. Spools and valve body bores are ground as matched pairs - this determines internal leakage performance and ensures proper fit.
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Assembly
The valve body, spools, springs, seals, and levers are assembled. Each assembler stamps their work for traceability.
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Pressure Testing
Every valve gets tested. Not every tenth one - every single one. We check neutral leakage, pressure drop across each section, lever effort, and external leaks under pressure. Test data is filed against the serial number.
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Final Inspection
One last check - appearance, marking, packaging. If it passes, it goes to inventory. If it doesn't, it goes back. We don't ship valves we wouldn't use ourselves.
More than 30 years hydraulic valve production experience
At least 10 inspection procedures are carried out before each batch is shipped
Supplying Laiye products to customers in more than 20 countries
FAQ
Q: Can the 2P40 be upgraded to a 3P40 later?
A: No. Both the 2P40 and 3P40 are monoblock valves. The body is a single casting. The number of spools is fixed at production. You cannot add a third spool to a 2P40, and you cannot remove one from a 3P40. If you think the machine may need a third function later, choose the 3P40 from the start.
Q: Which valve is better for simultaneous operation?
A: The 3P40. With three spools, the operator can run three functions at once. The 2P40 only allows two. However, both valves use a parallel circuit, so flow is shared between active functions. The function with the lighter load gets more flow. Neither valve provides load-independent flow sharing.
Q: Can I add more spools later?
A: No. The 2P40 is a monoblock valve - the number of spools is fixed at the factory. If you need more functions, choose 3P40 or 4P40 instead.
Q: Can the 2P40 Hydraulic Valve Two Levers be mounted in any orientation?
A: Yes, but horizontal with levers facing up is recommended for best lever feel and longest spring life. Other orientations may affect centering due to gravity.
Q: What should I do if oil is seeping from the valve body?
A: Check the mounting bolts first - if loose, torque them to spec. If bolts are secure, check the port seals for wear or damage. Seepage at the mounting face may require replacing seals or checking surface flatness.
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