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About Us
Zhejiang Gongzheng Machinery Co., Ltd.
Zhejiang Gongzheng Machinery Co., Ltd. is professional China European Load Sensing Valve Manufacturers and Wholesale European Load Sensing Valve Factory. Our core products include ABS (Anti-lock Braking System) and EBS (Electronic Braking System) control units, air dryers, air brake valves, and spring brake chambers, designed to meet the rigorous demands of the global commercial vehicle industry.

With advanced production technology, strict quality control, and a commitment to innovation, we provide reliable and efficient solutions for truck and trailer manufacturers worldwide. Our products comply with international standards, ensuring safety, durability, and superior performance in diverse operating conditions.

Key Products:
ABS & EBS Control Systems – Enhancing vehicle safety and stability.
Air Dryers – Ensuring clean, moisture-free air for braking systems.
Air Brake Valves – Precision-engineered for optimal braking performance.
Spring Brake Chambers – Robust design for heavy-duty applications.


At Zhejiang Gongzheng Machinery, we prioritize customer satisfaction, technological advancement, and sustainable growth. Partner with us for trusted braking solutions that drive excellence.
Safety. Reliability. Innovation.
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European Load Sensing Valve Industry knowledge

Zhejiang Gongzheng Machinery Co., Ltd. is a professional manufacturer of pneumatic braking components for European commercial vehicles. Our European Load Sensing Valve range is designed to modulate rear brake pressure according to actual axle load, preventing wheel lock-up and improving braking stability on trucks, tractors, and trailers. As a dedicated European Load Sensing Valve supplier, we offer multiple interface configurations, control pressure variants, and mechanical or pneumatic actuation options to match OEM and aftermarket requirements.

Our Load Sensing Valve Range

We supply eight distinct load sensing valve models, each engineered for a specific vehicle series or control architecture. The table below summarises the available variants and their primary application fit.

Model / Series Key Features Target Application
Load Sensing Valve with VOSS Interfaces VOSS plug-in connections; compact housing; direct bolt-on replacement Mercedes-Benz series (Actros, Atego)
High-Protection Load Sensing Valve Enhanced corrosion resistance; sealed electrical/ pneumatic ports DAF / RVI series (off-road and high-moisture environments)
Mechanically Linked Load-Sensing Valve Mechanical lever actuation; adjustable sensing ratio; robust construction Trailers and rigid trucks with mechanical suspension linkage
Load Sensing Valve with VOSS Interfaces and Silencer Integrated exhaust silencer; reduced noise emission; VOSS ports Urban buses and noise-sensitive applications
Universal High-Pressure Load Sensing Valve 3.8 bar control pressure; wide operating range; multi-vehicle compatibility Universal fit for European trucks and trailers
Multi-Delivery Load Sensing Valve Multiple delivery ports; progressive pressure modulation DAF / SCHMITZ trailer combinations
Pneumatically Controlled Intelligent Load-Sensing Regulating Valve Pneumatic pilot control; electronic feedback option; adaptive load response Advanced EBS-equipped vehicles requiring dynamic load sensing
Air Brake Hand Control Valve Manual pneumatic control; ergonomic handle; integrated load sensing function Trailer park brake and auxiliary load control

Application Fit and Process Considerations

Load sensing valves are installed between the rear axle and the chassis frame. The valve receives a mechanical or pneumatic input proportional to the suspension deflection (axle load) and modulates the brake pressure delivered to the rear brakes. Correct selection depends on:

  • Vehicle type: Truck, tractor, rigid, trailer, or bus – each has a distinct load spectrum and suspension geometry.
  • Actuation method: Mechanical linkage (lever arm) or pneumatic pilot signal. Our mechanically linked valves suit leaf-spring suspensions; pneumatically controlled valves fit air-suspension systems.
  • Control pressure range: Standard European systems operate at 3.8 bar control pressure; our universal high-pressure variant covers 3.8–8.5 bar.
  • Port configuration: VOSS, ISO, or custom interfaces. We supply VOSS as standard for Mercedes and DAF applications.
  • Environmental protection: For off-road or winter-service vehicles, specify our high-protection variant with sealed connectors and anti-corrosion coating.

Critical Specifications and Performance

Every load sensing valve we manufacture is tested for:

Operating pressure
Max 12.5 bar (standard pneumatic system)
Proof pressure 18 bar
Control pressure accuracy
±0.15 bar across the modulation range
Temperature range
-40°C to +80°C continuous operation
Flow capacity
Up to 1200 L/min at 6 bar supply

Configuration and Automation Integration

Our load sensing valves can be integrated into pneumatic braking systems with or without electronic control. For vehicles equipped with EBS, the pneumatically controlled intelligent regulating valve accepts a 0–10 V or PWM signal from the ECU, enabling dynamic load-dependent braking. Mechanical valves are supplied with a pre-set lever ratio; we can adjust the ratio during production based on your axle geometry and target deceleration curve.

We also offer custom bracket designs, port thread variants (M16×1.5, M22×1.5, G1/4), and colour-coded identification for aftermarket traceability.

Quality Assurance and Compliance

Our manufacturing facility in Zhuji, Zhejiang, operates under IATF 16949 quality management. Each load sensing valve undergoes 100% functional testing on a dedicated pneumatic test bench, verifying cracking pressure, flow rate, and leakage. We maintain material certifications for all aluminium and steel components. Our valves comply with ECE R13 requirements for braking distribution.

Installation, Maintenance, and Support

Installation is a direct bolt-on replacement for the original valve. We provide a mounting template and torque specifications with each unit. Recommended maintenance includes an annual inspection of the linkage (mechanical type) and a pneumatic leakage test. Spare parts – including diaphragm kits, O-ring sets, and lever assemblies – are available from stock. Our technical team can assist with first-fit validation via sample shipment.

Information We Use to Configure Your Solution

To prepare a precise quotation and configuration, we require the following project data:

  • Vehicle make, model, and year (or original part number)
  • Suspension type: leaf spring, air suspension, or other
  • Required actuation: mechanical (lever length and travel) or pneumatic (pilot pressure range)
  • Port type and thread size (VOSS, ISO, or custom)
  • Target brake pressure modulation curve (if available)
  • Environmental conditions: standard road, off-road, extreme cold, or high humidity
  • Annual volume and packaging preference (bulk, branded, or retail-ready)

Frequently Asked Questions

What is the difference between a mechanically linked and a pneumatically controlled load sensing valve?

A mechanically linked valve uses a lever arm connected to the axle to sense load; it is simple, robust, and suited for leaf-spring suspensions. A pneumatically controlled valve uses an air signal from the suspension bellows, making it ideal for air-suspension systems and easier to integrate with electronic braking controls.

Can I replace a Mercedes load sensing valve with a Gongzheng unit without modifying the air lines?

Yes. Our VOSS-interface models are direct-fit replacements for Mercedes Actros and Atego series. The port configuration and mounting hole pattern match the original, so no line modification is required.

Do you offer custom lever lengths for mechanically linked valves?

We do. Provide the required lever length and travel angle, and we will manufacture the valve with the correct ratio. Sample validation is recommended for first-time custom orders.

What is the typical lead time for a standard load sensing valve order?

Standard models are shipped within 15–25 working days after order confirmation, depending on quantity. Custom configurations may require 30–40 working days including sample approval.

Do your load sensing valves comply with ECE R13?

Yes. All our load sensing valves are designed and tested to meet ECE R13 requirements for braking distribution. Compliance documentation is available upon request.

Can I get a sample for first-fit testing before placing a bulk order?

Absolutely. We support sample orders for evaluation. Contact our sales team with your vehicle details, and we will recommend the correct model and arrange shipment.

Related Products and Categories

Our portfolio also includes Products, European Commercial Vehicles, European Air Dryer for applications with different operating ranges, interfaces or integration requirements.