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Relay Valves Wholesale

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Relay Valves Manufacturers

  • Y971 002 304 0-Relay Valves

    YFY No.

    YFY11025

    TECHNICAL DATAILS

    Port 1,1-2,2=M22x1.5,

    Port 4=M22x1.5

    VEHICLES

    DAF,RVI

    Y971 002 304 0
  • Y971 002 300 0-Relay Valves

    YFY No.

    YFY11026

    TECHNICAL DATAILS

    Port 1,1-2,2=M22x1.5,

    Port 4=M16x1.5

    VEHICLES

    DAF,RENAULT

    Y971 002 300 0
  • Y971 002 700 0-Relay Valves

    YFY No.

    YFY11027

    TECHNICAL DATAILS

    Port 1-1,1-2,2=M22x1.5,

    Port 4=M16x1.5

    VEHICLES

    DAF,RVI

    Y971 002 700 0
  • Y116205-Relay Valves

    YFY No.

    YFY11028

    TECHNICAL DATAILS

    SUP=3/4"NPT; DEL=6-3/8"NPT

    EME=2-1/4"NPT; SER=3/8"NPT

    VEHICLES

    TRAILER

    Y116205
  • Y110205-Relay Valves

    YFY No.

    YFY11029

    TECHNICAL DATAILS

    SUP=3/4"NPT; DEL=4-3/8"NPT

    EME=2-3/8"NPT; SER=3/8"NPT

    VEHICLES

    TRAILER

    Y110205
  • Y110200-Relay Valves

    YFY No.

    YFY11030

    TECHNICAL DATAILS

    SUP=3/4"NPT; DEL=4-3/8"NPT

    EME=2-1/4"NPT; SER=1/4"NPT

    VEHICLES

    TRAILER

    Y110200
  • YKN28520-Relay Valves

    YFY No.

    YFY11031

    TECHNICAL DATAILS

    SUP 1=1/2"NPT; SUP 2=1/2"NPT

    DEL=1/2"NPT; COUT=1/4"NPT

    VEHICLES

    TRAILER

    YKN28520
  • YKN28531-Relay Valves

    YFY No.

    YFY11032

    TECHNICAL DATAILS

    SUP 1=3/8"NPT; SUP 2=1/2"NPT

    DEL=3/8"NPT; COUT=1/4"NPT

    VEHICLES

    TRAILER

    YKN28531
  • YKN28500-Relay Valves

    YFY No.

    YFY11033

    TECHNICAL DATAILS

    SUP 1=3/8"NPT; SUP 2=3/8"NPT;

    DEL=3/8"NPT; COUT=1/4"NPT

    VEHICLES

    TRAILER

    YKN28500
  • YKN28510-Relay Valves

    YFY No.

    YFY11034

    TECHNICAL DATAILS

    SUP 1=1/2"NPT; SUP 2=3/8"NPT

    DEL=3/8"NPT; COUT=1/4"NPT

    VEHICLES

    TRAILER

    YKN28510
  • YKN30100-Relay Valves

    YFY No.

    YFY11035

    TECHNICAL DATAILS

    DEL=1/4"NPT, RES=3/4"NPT

    SER=1/4"NPT, EME=1/4"NPT

    VEHICLES

    TRAILER

    YKN30100
  • YKN30200-Relay Valves

    YFY No.

    YFY11036

    TECHNICAL DATAILS

    DEL=3/8"NPT, RES=3/4"NPT

    SER=3/8"NPT, EME=3/8"NPT

    VEHICLES

    TRAILER

    YKN30200
  • YKN30300-Relay Valves

    YFY No.

    YFY11037

    TECHNICAL DATAILS

    DEL=1/4"NPT, RES=3/4"NPT

    SER=1/4"NPT, EME=1/4"NPT

    VEHICLES

    TRAILER

    YKN30300
  • YKN30400-Relay Valves

    YFY No.

    YFY11038

    TECHNICAL DATAILS

    DEL=3/8"NPT, RES=3/4"NPT

    SER=1/4"NPT, EME=1/4"NPT

    VEHICLES

    TRAILER

    YKN30400
  • Y281860-Relay Valves

    YFY No.

    YFY11039

    TECHNICAL DATAILS

    SUP=3/4"NPT; RES=3/8"NPT

    DEL=1/4"NPT

    VEHICLES

    TRAILER

    Y281860
  • Y281865-Relay Valves

    YFY No.

    YFY11040

    TECHNICAL DATAILS

    SUP=3/4"NPT; RES=3/8"NPT

    DEL= 1/4"NPT+3/8"NPT

    VEHICLES

    TRAILER

    Y281865
  • Y279180-Relay Valves

    YFY No.

    YFY11041

    TECHNICAL DATAILS

    SUP=3/8"NPT;

    DEL=3/8"NPT;

    CON=1/4"NPT

    VEHICLES

    TRAILER

    Y279180
  • Y280375-Relay Valves

    YFY No.

    YFY11042

    TECHNICAL DATAILS

    SUP=1/2"NPT;

    DEL=3/8"NPT;

    CON=1/4"NPT

    VEHICLES

    TRAILER

    Y280375
  • YKN28600-Relay Valves

    YFY No.

    YFY11043

    TECHNICAL DATAILS

    SUP+SPR=3/4"NPT;

    DEL=3/8"NPT;

    CON=1/4"NPT

    VEHICLES

    TRAILER

    YKN28600
  • YKN28601-Relay Valves

    YFY No.

    YFY11044

    TECHNICAL DATAILS

    SUP+SPR=1/2"NPT;

    DEL=3/8"NPT;

    CON=1/4"NPT

    VEHICLES

    TRAILER

    YKN28601
  • Y103028-Relay Valves

    YFY No.

    YFY11045

    TECHNICAL DATAILS

    SUP=1/2"NPT, DEL=1/2"NPT

    CON=1/4"NPT, BAL=1/8"NPT

    VEHICLES

    TRAILER

    Y103028
  • Y102626-Relay Valves

    YFY No.

    YFY11046

    TECHNICAL DATAILS

    SUP=1/2"NPT,

    DEL=1/2"NPT

    CON=1/4"NPT

    VEHICLES

    TRAILER

    Y102626
  • Y103010-Relay Valves

    YFY No.

    YFY11047

    TECHNICAL DATAILS

    SUP=3/4"NPT, DEL=1/2"NPT

    CON=1/4"NPT, BAL=1/8"NPT

    VEHICLES

    TRAILER

    Y103010
  • Y103009-Relay Valves

    YFY No.

    YFY11048

    TECHNICAL DATAILS

    SUP=3/4"NPT,

    DEL=1/2"NPT,

    CON=1/4"NPT

    VEHICLES

    TRAILER

    Y103009

The Trailer Relay Valve is one of the important components in truck and trailer braking systems. Its functions and characteristics are critical to ensuring vehicle safety and performance. Trailer Relay Valve has a brake pressure adjustment function that can adjust the sensitivity and efficiency of the braking system by controlling air pressure to ensure the normal operation of the braking system. It can also balance the braking force between the truck and the trailer, avoid instability caused by speed differences, and improve the stability and safety of the entire vehicle's braking. Trailer Relay Valve is also designed to prevent excessive stress on the braking system, protecting brake components, extending their life, and improving overall safety. It can quickly respond to the driver's braking instructions to ensure that the vehicle can stop or slow down in time when needed, providing the driver with better control and safety. Trailer Relay Valve also has the characteristics of strong durability and wide applicability. It is usually made of durable materials that can withstand long-term use and various environmental conditions. Moreover, it is suitable for different types of trailers, including flatbed trailers, box trailers, tank trucks, etc., providing flexibility for various application scenarios.

Zhuji Infia Auto Parts Co., Ltd.

Established in 2007

About Us

Zhuji Infia Auto Parts Co., Ltd. was established in 2007 and is a professional China Relay Valves Factory and Relay Valves Suppliers.
We are specialized in the development and production of clutch servo,hand brake valve,leveling valve,ecas valve,air dryer ,multi-circuit protection valve,etc.We can also develop the products according to customers' drawings and samples.
We have a professional technical team and sales team,which can help us to provide you our good quality and service.
We focus on the good quality,wide range products,highly competitive prices and timely deliverly.
Welcome to contact us for future business relationships and mutual success!

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Industry Knowledge Expansion

1. Key Components of Relay Valves

Understanding the key components of relay valves is essential for diagnosing issues, performing maintenance, and ensuring optimal performance. Each component plays a critical role in the valve's operation, contributing to the overall efficiency and reliability of the pneumatic system.
a)Housing: The housing is the outer shell of the relay valve, providing structural integrity and protection for the internal components. Typically made from durable materials such as aluminum, brass, or high-strength plastics, the housing must withstand the operational pressures and environmental conditions encountered in various applications. Precision manufacturing of the housing ensures proper alignment and sealing of all internal parts, preventing leaks and maintaining system efficiency.
b)Inlet and Outlet Ports: The inlet and outlet ports are critical points of connection for the air supply and delivery systems. The inlet port allows pressurized air to enter the valve from the control source, while the outlet port directs the controlled air to the actuator or other system components. These ports are designed to provide secure, leak-free connections, often incorporating threaded or quick-connect fittings. Proper sizing and placement of the ports are essential for maintaining optimal airflow and minimizing pressure drops.
c)Diaphragm or Piston: The diaphragm or piston is the movable element within the relay valve that responds to the control pressure. This component translates the control signal into mechanical motion, opening or closing the internal passages to regulate air flow. Diaphragms are typically made from flexible materials such as rubber or elastomers, providing a responsive and airtight seal. Pistons, on the other hand, are usually constructed from metal or reinforced plastics, offering greater durability and resistance to wear. The choice between a diaphragm or piston design depends on the specific application requirements and desired performance characteristics.
d)Spring: The spring in a relay valve provides the necessary force to return the diaphragm or piston to its original position when the control signal is removed. This ensures that the valve resets to its default state, ready for the next control input. Springs are carefully calibrated to provide the appropriate force for the valve's operation, balancing responsiveness with stability. The material and design of the spring are chosen to withstand repeated cycling without losing tension or suffering from fatigue.
e)Seals and Gaskets: Seals and gaskets are essential for preventing air leaks within the relay valve. These components are strategically placed at critical junctions, such as between the housing and the diaphragm or piston, around the inlet and outlet ports, and at other potential leakage points. High-quality materials, such as rubber, silicone, or PTFE, are used for seals and gaskets to ensure a tight, durable seal that can withstand the pressures and temperatures encountered in operation. Proper maintenance and periodic replacement of these components are vital for maintaining valve performance and system integrity.

2. Troubleshooting Relay Valve Issues

Relay valves are crucial components in pneumatic systems, and their proper functioning is essential for the reliability and efficiency of the entire system. However, like any mechanical device, relay valves can encounter issues that require troubleshooting. Identifying and resolving these issues promptly can prevent system downtime and extend the life of the valve. Here are common problems that may arise with relay valves and systematic approaches to troubleshooting them.
a)Air Leaks: Hissing sound near the valve、Reduced system pressure、Inconsistent performance of connected components， Troubleshooting Steps: Visual Inspection: Examine the valve for visible signs of wear, cracks, or damage, especially around the inlet, outlet, and control ports. Check for loose fittings or connections. Soapy Water Test: Apply a solution of soapy water to potential leak points. Bubbles will form at the location of any leaks. Tighten Connections: Ensure all fittings and connections are properly tightened. Use appropriate tools to avoid over-tightening, which can cause damage. Replace Seals and Gaskets: Worn or damaged seals and gaskets are common sources of leaks. Replace them with new, high-quality components as needed.
b)Sticking Diaphragm or Piston: Delayed or no response to control signals、Erratic operation、Audible clicking or sticking noises， Troubleshooting Steps: Disassemble the Valve: Carefully disassemble the valve according to the manufacturer’s instructions, paying attention to the placement of all components. Clean Internal Components: Remove any debris, dirt, or corrosion from the diaphragm, piston, and internal passages. Use appropriate cleaning agents and tools to avoid damaging sensitive parts. Inspect for Wear: Check the diaphragm or piston for signs of wear, damage, or deformation. Replace any worn components. Lubricate Moving Parts: Apply a light coat of suitable lubricant to moving parts to reduce friction and facilitate smooth operation. Use lubricants recommended by the valve manufacturer.
c)Inconsistent Pressure Regulation: Fluctuating system pressure、Poor performance of downstream components、Unstable output from the relay valve, Troubleshooting Steps: Pressure Testing: Use pressure gauges to measure the input and output pressures. Compare these readings to the specifications provided by the valve manufacturer. Check Control Signal: Ensure the control signal is stable and within the specified range. Verify that the control port is receiving the correct input. Inspect Internal Passages: Disassemble the valve and check for blockages or restrictions in the internal passages. Clean as necessary to ensure unrestricted airflow. Replace Worn Springs: Springs can lose tension over time, leading to inconsistent pressure regulation. Replace worn or weakened springs with new ones specified by the manufacturer.