With over 20 years in exporting brake system parts, we specialize in manufacturing high-precision Load Sensing Proportioning Valves that dynamically adjust rear brake force based on vehicle load. Our LSPVs are widely used in light trucks, cargo vans, and SUVs. We offer full-service OEM/ODM and custom solutions, with end-to-end production from casting and machining to assembly and performance testing.

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We provide a wide range of master cylinder products categorized by OE numbers and compatible brands for easy reference and selection.

Brake Proportioning Valve products

Picture	Product	OEM	Description	DIA	FSD	SPS
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM 47900-0K040	47900-0K040
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM 47910-0K020	47910-0K020
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM 47900-BZ040-000	47900-BZ040-000
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM 4655A025	4655A025
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM MB-618321	MB-618321	MITSUBISHI L200 TRITON (86-10)
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM			1/8
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM			14
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM 51701191/51837342/0204031199	51701191 51837342 0204031199	FIAT SIENA (96-)	1/4
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM			3/8- 21/64
	LOAD-SENSING PROPORTIONING VALVE ASSEMBLY OEM 4613	4613		14

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What Is a Load Sensing Proportioning Valve?

A Load Sensing Proportioning Valve is a hydraulic device that automatically adjusts rear brake pressure based on changes in rear axle load. It ensures a balanced brake fluid distribution between the front and rear wheels under different loading conditions, preventing rear-wheel lockup and enhancing braking stability.

Structure & Components

Part Name	Function Description
Valve Body	Mounted to chassis, houses hydraulic channels and mechanisms
Piston	Moves to open/close valve under pressure and spring force
Tension Spring	Adjusts preload as rear axle moves relative to body
Lever / Link Arm	Connects suspension to transmit axle load to spring
Valve Core/Plug	Regulates hydraulic passage to control output pressure
Inlet Port A	Receives brake pressure from master cylinder
Outlet Port B	Sends adjusted pressure to rear wheel cylinders
Stabilizer Link	Converts suspension movement into spring preload
Adjusting Screw	Sets initial valve position and pressure threshold

👉If you want to know more about Brake Proportioning Valve, please check out our article: What Is a Brake Proportioning Valve?

Working Principle Flow of LSPV

Initial State (No Braking)

Piston is at rightmost position due to spring force; valve is open, pressure equalized

Normal Braking (Light Load)

Small pressure differential keeps valve open, allowing full pressure to rear brakes

Heavy Braking (Increased Load)

Piston moves left, valve closes, limiting pressure increase to rear wheels

Continuous Braking Adjustment

Valve opens and closes cyclically, maintaining dynamic balance for pressure control

About Us

We are a specialized manufacturer of load sensing proportioning valves, offering full-scale in-house capabilities from aluminum casting and CNC machining to complete valve testing. Our valves are widely used in pickups, light trucks, and SUVs—automatically adjusting brake force distribution based on vehicle load. Trusted in over 80 countries, we support both volume production and custom OEM/ODM solutions.

Years of Production experience

9600

Factory area(m²)

3000+

Product category

2,000,000+

Annual Production

Learn more

Our Product Advantages

Material Selection

Made of high-strength aluminum alloy die-casting, corrosion-resistant for harsh environments

Precision Machining

Key areas machined with CNC for high coaxial accuracy and tight sealing

Strong Stability

Responsive tension spring and lever system ensures fast and accurate braking force adjustment

Easy Installation and Matching

Universal mounting design fits a wide range of vehicle models for easy replacement

Quality Assurance

Each unit is tested for sealing, fatigue resistance, and dynamic performance before shipment

Manufacturing Capabilities

We operate specialized production lines for LSPVs, with annual capacity over 200,000 units, and full mold development capabilities.

8 aluminum gravity casting lines

28 CNC machining lines with 4-axis centers & deep-hole drills

8 master cylinder assembly lines + 4 booster assembly lines

8 Assembly Lines for Master Cylinders & Proportioning Valves

In-house Testing Lab: Equipped for Sealing, Fatigue & Endurance Tests

Dedicated Mold Development Center

Download Center

Product Catalog (by OE)

Material Certifications

Performance & Test Reports

Illustrated Installation Guide

Dimensional and Concentricity Checks

Visual Inspection by Trained Staff

Airtightness Pressure Tests

Vacuum Sealing Tests

Life Cycle Testing (According to Customer Requirements)

Endurance Tests (Optional)

Pre-packaging random inspection and traceability code recording

Final Sampling & Traceability Coding

Quality Control & Certifications

Each unit undergoes the following quality control tests before shipment:

Dimensional and Concentricity Checks

Visual Inspection by Trained Staff

Airtightness Pressure Tests

Vacuum Sealing Tests

Endurance Tests (Optional)

Final Sampling & Traceability Coding

Frequently Asked Questions

Is the load-sensing proportioning valve applicable to all vehicles?

Not all vehicles require it. It is mainly used in light trucks, pickups, and certain buses. Customization is available based on vehicle models.

How to know if the LSPV is malfunctioning?

Signs include rear wheel lock-up, weak braking, or rear axle vibration. Professional diagnosis is recommended.

Can you customize non-standard LSPVs?

Yes, we offer OEM/ODM services based on suspension type, mounting needs, and load characteristics.

Get a Quote or Sample

Free samples & engineering support available Open to global distributor & brand partnerships

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Products By Brand OEM Services About us Resource

Email: cth4921687671996@gmail.com

Phone: 0086-15957686676

Factory Add: No. 333, Chengzhong Road, Yuhuan City, Taizhou City, Zhejiang Province, China

+86 15957686676

cth4921687671996@gmail.com

+86 15957686676

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Brake Master Cylinder

Clutch Master Cylinder

Clutch Slave Cylinder

Brake Wheel Cylinder

Brake Proportioning Valve

Cylinder Accessories

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Trusted Load Sensing Proportioning Valve Manufacturer

Search products (by OE Number)

Brake Proportioning Valve products

By brand

What Is a Load Sensing Proportioning Valve?

Structure & Components

👉If you want to know more about Brake Proportioning Valve, please check out our article: What Is a Brake Proportioning Valve?

Working Principle Flow of LSPV

Initial State (No Braking)

Normal Braking (Light Load)

Heavy Braking (Increased Load)

Continuous Braking Adjustment

About Us

Our Product Advantages

Material Selection

Precision Machining

Strong Stability

Easy Installation and Matching

Quality Assurance

Manufacturing Capabilities

8 aluminum gravity casting lines

28 CNC machining lines with 4-axis centers & deep-hole drills

8 Assembly Lines for Master Cylinders & Proportioning Valves

In-house Testing Lab: Equipped for Sealing, Fatigue & Endurance Tests

Dedicated Mold Development Center

Download Center

Quality Control & Certifications

Frequently Asked Questions

Is the load-sensing proportioning valve applicable to all vehicles?

How to know if the LSPV is malfunctioning?

Can you customize non-standard LSPVs?

Get a quote

Get a quote