Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of 4p80 hydraulic valve four levers in China, also supports customized service. If you're going to wholesale high quality 4p80 hydraulic valve four levers made in China, welcome to get pricelist from our factory.
Product Introduction
The 4P80 is a monoblock directional control valve - one-piece cast body, not sections bolted together. It's part of the P80 series and comes with four spools, each controlling a separate hydraulic function.
The single-piece cast iron body keeps the package compact and eliminates seals between sections - fewer leak points, less maintenance.
Core Components: The 4P80 Hydraulic Valve Four Levers is built around a single-piece cast iron body. Inside, you've got four hardened, precision-ground spools - one for each lever. Each spool has its own return spring and detent mechanism to give the lever a positive feel.
Because it's monoblock, there are no through-bolts to torque, no seals between sections, and no stack to assemble. Just one solid block of iron with all the internal passages machined directly into it. Fewer parts, fewer leak points.
Detail Data
| Parameter | Value / Range |
|---|---|
| Valve Type | Monoblock Directional Valve |
| Number of Spools | 4 |
| Control Method | Manual lever |
| Valve Body | Single-piece cast iron |
| Inlet Port (P) | G1/2" BSP (standard) |
| Return Port (T) | G3/4" BSP (standard) |
| Work Ports (A, B) | G3/8" BSP (standard) |
| Optional Ports | SAE 10/12, M22×1.5, M27×2.0, 1/2" NPT, 3/4" NPT |
Options & Customization
Port threads: G1/2" / G3/4" / G3/8" (standard) / SAE / NPT / Metric
Lever style: standard or custom
Valve marking, packaging, shipping marks - all customizable for OEM orders
Port Configuration
| Port | Thread Size |
|---|---|
| P (Pressure Inlet) | G1/2" BSP |
| T (Return to Tank) | G3/4" BSP |
| A, B (Working Ports, per spool) | G3/8" BSP |
Our production and equipment
35+
years
More than 35 years pressure valve components experience
32
Employee
Professional hydraulic valve production management team of more than 200 people
18
Countries
Supplying Laiye products to customers in more than 20 countries
why choose our products
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.
Quality Control
100% incoming material inspection.
Every valve is tested individually on dedicated test stands.
Each valve has a unique serial number with fully traceable test data.
ISO 9001 quality management system certified.
12-month warranty on all products.
What We Offer
OEM/ODM customization: marking, packaging, labeling, and custom configurations.
Technical support: pre-sales consultation and after-sales support.
12-month warranty from Bill of Lading.
Material certificates, test reports, and certificates of origin available upon request.
We export to more than 20 countries with annual exports exceeding 10,000 containers.
Manufacturing Process
Raw Material Inspection
Iron castings and steel arrive with mill certificates. We verify each batch through spectral analysis - 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 4P80 is a monoblock valve - the entire body is machined from a single casting in one setup. All spool bores, mounting surfaces, and porting are held to micron-level tolerances.
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Heat Treatment
Machined bodies go through heat treatment to relieve internal stress and improve wear resistance - this 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 step determines internal leakage performance and ensures proper fit. The clearance between them is what keeps leakage low.
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Assembly
The valve body, spools, springs, seals, and levers are assembled. Each assembler stamps their work - if something comes up later, we know who built it.
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Pressure Testing
Every valve gets tested. Not every tenth one - every single one. We check pressure, seal integrity, and shifting performance. Test data is filed against the serial number for full traceability.
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Final Inspection & Packaging
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.
Certifications
One-stop Hydraulic Parts Factory in China
FAQ
Q: What causes the sluggish response when the P80 valve shifts?
A: Possible causes include insufficient pilot pressure, a blockage in the pilot oil circuit, high resistance to spool movement, or excessive oil viscosity. Start by checking the oil temperature and pilot pressure, then inspect the spool for any sticking or binding.
Q: Does the P80 require retesting after repair?
A: Yes. For a valve reinstalled after repair, it is recommended to test its opening pressure, internal leakage, and shifting performance on a test bench to confirm proper operation before mounting it onto the equipment, thereby avoiding the need for rework.
Q: How do I bleed the air from the 4P80 Hydraulic Valve Four Levers?
A: Before initial startup, loosen the working inlet port fitting or the air bleed plug to allow the valve body to fill with oil; tighten it once oil begins to flow out. Then, operate the system at low pressure a few times to purge air from the lines and valve cavities.
Q: What are the consequences of installing the P80 valve incorrectly?
A: If installed incorrectly, the direction of the spool's movement will be opposite to the direction of operation-for instance, pushing the handle to the left would cause the equipment to move to the right. After installation, test the unit to verify the direction of movement and adjust the piping connections promptly if any issues are found.
Q: Are the P80 spool and valve body matched pairs?
A: Yes. The P80 spool and the bore of the valve body are precision-ground to match each other; each set is produced as a matched pair, so they cannot be interchanged arbitrarily. When replacing the spool, the valve body serial number must be provided so the supplier can supply the correct matching part.
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