Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of 3p40 hydraulic valve three levers in China, also supports customized service. If you're going to wholesale high quality 3p40 hydraulic valve three levers made in China, welcome to get pricelist from our factory.
Product Information
The 3P40 is a monoblock valve - one solid piece of iron. No sections bolted together. No seals between sections because there are no sections.
Three levers. Three spools. 40 L/min.
Three functions in one compact package. That's the difference. Most monoblock valves come with one or two spools. Three is a sweet spot for a lot of equipment - tractors need lift, steering, and auxiliary; small loaders need boom, bucket, and steering. Three functions cover most of what these machines do.
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 three functions in a compact package, the 3P40 Hydraulic Valve Three Levers is a straightforward choice.
A Closer Look
Three Levers - Three Functions
Three spools means you can control three hydraulic functions - lift, tilt, steering, or auxiliary. One lever for each function. Simple and intuitive.
40 L/min - The Flow for Compact Equipment
40 L/min is what small excavators, loaders, and forklifts need. Not too much, not too little. Enough to get the work done without oversizing the valve.
Open-Center Parallel Circuit
When all levers are in neutral, pump flow returns to tank. No pressure build-up. No wasted energy. When you move a lever, oil goes to the actuator. Move two levers, both functions work at the same time.
Monoblock Simplicity
One casting. No stack assembly. No section-to-section alignment issues. The spool bores are all machined into the same block, so they stay aligned for the life of the valve. No through-bolts to check. No section seals to leak.
Spring-Centered Spools
Release the lever, springs return the spool to neutral. The valve defaults to a safe state - no unexpected movement.
Where It's Typically Used
Based on its three-spool configuration, the 3P40 Hydraulic Valve Three Levers typically ends up on:
Tractors
Lift, steering, and auxiliary functions. Three levers give the operator direct control over the three most important functions.
Small Loaders
Boom, bucket, and steering. Operators notice the difference when stacking material - the boom comes up without that lag.
Forklifts
Mast tilt, lift, and side-shift. The compact monoblock design fits in tight equipment compartments.
Skid-Steer Loaders
Boom, bucket, and attachments. The open-center parallel circuit keeps everything moving.
Our factory
Shijiazhuang Laiye Import & Export Trading Co., Ltd., part of Hebei Onederful® Hydraulic Technology Co., Ltd., has been manufacturing hydraulic components since 1988 - over 35 years of experience. We are a factory, not a trading company, with around 200 employees and a full in-house production process covering casting, machining, assembly, testing, and phosphating. Every valve is individually tested, not spot-checked, with test data filed against its serial number for full traceability. We export to more than 20 countries, hold ISO 9001 certification, and offer OEM customization, technical support, and a 12-month warranty. Material certificates, test reports, and certificates of origin are available upon request.
Specifications
| Parameter | Value |
|---|---|
| Valve Type | Monoblock Directional Valve |
| Number of Spools | 3 |
| Nominal Flow | 40 L/min |
| Circuit Type | Open-center, parallel circuit |
| 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
product advantages
Comprehensive Product Information and Personalized Service
High-quality products and satisfactory prices
Guaranteed Delivery Deadlines and Comprehensive Delivery Channels
Exceptional After-Sales Problem-Solving Capabilities
Installation and Care
Installation
Mount on a clean, flat surface. Torque evenly. Flush all hydraulic lines before connecting.
First Start
Fill the valve with oil before start-up. Start at low pressure and idle for 2-3 minutes to purge air. Cycle each lever. If a cylinder moves backward, swap A and B lines on that section.
Daily Use
Check for external leakage periodically. Keep the valve clean. Check lever dust boots every 500 hours - replace if cracked.
Oil Requirements
Standard mineral-based hydraulic oil - ISO VG 32, 46, or 68.
Keep oil clean - regular oil and filter changes are essential.
Honor and qualification
Official certification, professional after sales service.
the final view of project
Working Principle
The 3P40 features an open-center, parallel circuit design-a standard configuration in the fields of agricultural machinery and mobile equipment-making it ideal for applications requiring the simultaneous execution of multiple functions.
Neutral Position:When all three control levers are in the center position, the flow output from the hydraulic pump passes directly through the valve body and returns to the oil tank, thereby minimizing pressure loss.
Single-Circuit Operation:Actuating any one of the control levers causes its corresponding spool to shift, directing the flow from inlet port P to either port A or port B of that specific circuit; simultaneously, the opposite port of that circuit connects to the return line (port T).
Spring Return:All spools are designed with an automatic spring-centering mechanism. Once a control lever is released, it automatically returns to the neutral position, thereby halting the movement of the actuator (such as a hydraulic cylinder or motor).
Parallel Circuitry:The three spools share a common parallel circuit system, allowing each functional circuit to operate either independently or simultaneously in coordination with the others.
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FAQ
Q: What is the 3P40 hydraulic valve used for?
A: The 3P40 is a monoblock valve used to control three hydraulic functions in compact equipment - tractors (lift, steering, auxiliary), small loaders (boom, bucket, steering), forklifts (tilt, lift, side-shift), and skid-steer loaders. It directs oil flow to three actuators, controlling their speed, direction, and position.
Q: What is the difference between 3P40 and 1P40/2P40/4P40?
A: The number of spools/levers. 3P40 has three functions. 1P40 has one, 2P40 has two, 4P40 has four. All are monoblock valves in the P40 series with the same flow rate. Choose based on how many functions your equipment needs.
Q: What does "open-center parallel circuit" mean?
A: Open-center means when all levers are in neutral, pump flow returns to tank - no pressure build-up, no wasted energy. Parallel circuit means multiple functions can operate at the same time. Move two levers, both functions work simultaneously.
Q: Can I add more spools later?
A: No. The 3P40 is a monoblock valve - the number of spools is fixed at the factory. If you need more functions, choose 4P40 instead.
Q: Can the 3P40 be used with a closed-center hydraulic system?
A: The 3P40 is designed for open-center systems. For closed-center systems, spool options may need adjustment. Contact us with your system details to confirm compatibility.
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