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Coach Air Bag Height Valve, 3 Port Thread & Quick Connect Height Control Valve

China Coach Air Bag Height Valve, 3 Port Thread & Quick Connect Height Control Valve

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Coach Air Bag Height Valve, 3 Port Thread & Quick Connect Height Control Valve

MOQ： 10
Price： $5.70~$11.50/pc
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Connection Type	Thread Type / Quick Connector (Quick Plug) Type
Supply Ability	5000 pieces per month
Delivery Time	5-8 work days
Product Category	Bus Chassis Parts / Air Suspension System
Compatible Bus Brands	Yutong, Kinglong, Higer, Ankai, Zhongtong, Golden Dragon, etc.
Port Quantity	3 Ports (Inlet / Outlet / Exhaust)
Application	Large Passenger Bus, Coach, City Bus, Tourist Bus, New Energy Electric Bus
Packaging Details	Each unit packed with shockproof foam inside neutral carton; multiple cartons loaded into export outer cartons. Custom packaging is acceptable.
Payment Terms	T/T,D/P,D/A,L/C
Product Name	Air Bag Height Control Valve / Air Suspension Leveling Valve
Place of Origin	China
Brand Name	Knorr
Model Number	5021-LW/GDF-3300/SV1287/KLY-GDF/5021-KC/5021-KC-T

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Product Specification


Connection Type	Thread Type / Quick Connector (Quick Plug) Type	Supply Ability	5000 pieces per month
Delivery Time	5-8 work days	Product Category	Bus Chassis Parts / Air Suspension System
Compatible Bus Brands	Yutong, Kinglong, Higer, Ankai, Zhongtong, Golden Dragon, etc.	Port Quantity	3 Ports (Inlet / Outlet / Exhaust)
Application	Large Passenger Bus, Coach, City Bus, Tourist Bus, New Energy Electric Bus	Packaging Details	Each unit packed with shockproof foam inside neutral carton; multiple cartons loaded into export outer cartons. Custom packaging is acceptable.
Payment Terms	T/T,D/P,D/A,L/C	Product Name	Air Bag Height Control Valve / Air Suspension Leveling Valve
Place of Origin	China	Brand Name	Knorr
Model Number	5021-LW/GDF-3300/SV1287/KLY-GDF/5021-KC/5021-KC-T

We supply various models of height control valves for buses and coaches. Different specifications including thread type and quick connector type are available to match multiple chassis and vehicle brands. Please check the detailed model list as below:

No.	Model	Compatible Brand	Product Type	Connection / Material
1	5021-LW	Hande	Height Control Valve	Thread Type
2	GDF-3300	Universal	Height Control Valve	Precision Aluminum
3	SY1287	Youngman	Height Control Valve	Standard
4	KLY-GDF	New Energy Bus	Height Control Valve	For New Energy Vehicle
5	5021-KC	Hande	Height Control Valve	Quick Connector Type
6	5021-KC-TC	Hande	Height Control Valve	Quick Connector Type

We have a wide range of models available. Please send inquiries via email for more details.

Ⅰ. Purpose

1. The air bag height control valve, also known as air suspension leveling valve, is a core component of vehicle air suspension system.

2. It automatically senses the height change between the frame and axle caused by load variation.

3. When the vehicle load increases and the body sinks, the valve opens to inflate the air spring.

4. When the load decreases and the body rises, the valve exhausts excess air from the air spring.

5. It keeps the vehicle body at a constant designed height under different loads, stabilizes chassis posture, improves driving comfort, protects air springs and other suspension parts, and ensures stable headlight irradiation height.

Product Name	Air Bag Height Control Valve / Air Suspension Leveling Valve
Product Category	Bus Chassis Parts / Air Suspension System
Application	Large Passenger Bus, Coach, City Bus, Tourist Bus, New Energy Electric Bus
Mounting Position	Air Suspension System, connected with air spring and air tank
Function	Automatically adjust and maintain vehicle body height, keep chassis level under different load conditions
Working Medium	Compressed Air
Port Quantity	3 Ports (Inlet / Outlet / Exhaust)
Connection Type	Thread Type / Quick Connector (Quick Plug) Type
Thread Specification	Standard Metric Thread
Valve Body Material	High-strength Aluminum Alloy (Precision Aluminum)
Internal Diaphragm	Wear-resistant Rubber Diaphragm
Seal Material	Nitrile Rubber (NBR), oil-resistant & aging-resistant
Adjustment Mode	Automatic Mechanical Adjustment via Control Linkage Rod
Air Tightness	Low leakage rate, reliable sealing performance
Service Life	Long durability under normal working conditions

Ⅱ. Installation Method

1. Fix the main body of height valve on vehicle frame or bracket with bolts, ensure the mounting base is firm and free of shaking.

2. Connect the control lever arm of height valve to the axle / suspension arm with a connecting rod.

3. Adjust the length of connecting rod to set the standard ride height of vehicle.

4. Connect air pipelines: air inlet connects to air tank, air outlet connects to air spring, exhaust port faces downward to avoid water accumulation.

5. After piping assembly, check all joints for air leakage.

6. Conduct height test under rated load to confirm the body height meets factory standard.

Ⅲ. Important Precautions

1. Do not bend, twist or forcibly pull the control lever arm during installation; excessive force will damage internal linkage structure.

2. The connecting rod must have proper swing clearance. Avoid jamming, collision or stress in full suspension travel.

3. Keep the exhaust port unobstructed. Do not block or wrap the exhaust hole.

4. The compressed air supply must be dry and clean. Moisture, oil and impurities will accelerate internal valve wear and cause air leakage.

5. Regularly check connecting rod looseness, pipeline aging and joint air leakage during vehicle maintenance.

6. If continuous abnormal air leakage occurs, stop using and inspect or replace the height valve immediately.

7. Do not modify the internal structure of the valve privately, otherwise the sealing performance and service life will be affected.

8. When storing spare valves, place them in dry environment, avoid long-term exposure to rain, dust and corrosive atmosphere.

Company Details

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Manufacturer,Trading Company 
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Year Established:

2010 
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Total Annual:

80000000-90000000
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Employee Number:

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Xi'an Jieguan Trading Co., Ltd.Founded 22 years ago, we are an integrated manufacturer & foreign trade enterprise specializing in full-range commercial vehicle spare parts, located in Xi'an, Shaanxi Province, China. Our company owns a 300-square-meter modern office space, paired with a self... Xi'an Jieguan Trading Co., Ltd.Founded 22 years ago, we are an integrated manufacturer & foreign trade enterprise specializing in full-range commercial vehicle spare parts, located in Xi'an, Shaanxi Province, China. Our company owns a 300-square-meter modern office space, paired with a self...

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Xi'an Jieguan Auto Parts Co., Ltd.
No. 221 Zaoyuan West Road, Zaoyuan Subdistrict, Lianhu District, Xi’an, Shaanxi Province (Next to East of Sanqiao Auto Parts City)
https://www.sparepartsbus.com/

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