T: +8615609213525
E: 15829336298@139.com
E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
| Quantity: | |
|---|---|
WG2203250003
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Dual H Air Control Valve / Twin H-Type Pneumatic Leveling Valve |
| Common Names | Double H Valve, Cab Height Control Valve, Air Suspension Regulating Valve |
| Function | Controls inflation/deflation of air springs to maintain or adjust driver cab height |
| Operating Principle | Mechanically linked to cab suspension; adjusts air pressure based on load and position |
| Control Type | Pneumatic pilot valve with mechanical linkage feedback |
| Number of Ports | 6–8 ports (standard configuration): • 1 × Air Inlet (from reservoir) • 2 × Outlets (to left/right airbags) • 1 × Exhaust port • Pilot signal lines |
| Working Pressure | 0.7 – 1.0 MPa (7–10 bar) — standard truck air system pressure |
| Material | |
| • Body: High-strength die-cast aluminum alloy or brass | |
| • Seals: NBR (nitrile rubber) or FKM (fluoroelastomer) for oil resistance | |
| Temperature Range | -40°C to +80°C (suitable for extreme climates) |
| Mounting Position | Mounted under the driver's cab, connected via lever arm to rear suspension |
| Flow Rate | High-flow precision metering for balanced lift/lower speed |
| Condition | New (OEM original or premium aftermarket) |
Name1
Name2
Verify Compatibility Before Purchase
Confirm your truck model (especially X3000 vs F3000) and whether your cab has air suspension.
Check if the existing system uses mechanical linkage or electronic sensors.
Professional Installation Recommended
Air supply line (from main reservoir)
Airbags (left and right)
Mechanical linkage rod (from rear suspension)
Requires connection to:
Misalignment causes incorrect leveling.
Ensure Clean Air Supply
Install after an air dryer and filter.
Moisture or dirt can clog internal passages and damage seals.
Adjust Linkage Arm Correctly
The lever arm must move freely and return to neutral position.
Improper length or tension results in inaccurate height sensing.
Check for Air Leaks
After installation, apply soapy water to all fittings — look for bubbles.
Even small leaks reduce system efficiency.
Use Proper Fasteners
Replace old O-rings, gaskets, and thread sealant.
Use Teflon tape or aviation-grade thread locker on threaded connections.
Avoid Over-Pressurization
Do not exceed 1.0 MPa (~145 psi).
Excessive pressure damages diaphragms and airbags.
Inspect Regularly
Cracks in housing
Corroded connectors
Worn or stiff linkage joints
Look for:
Lubricate pivot points annually.
Do Not Modify Internally
Internal components are factory-calibrated — do not disassemble unless replacing entirely.
Storage Advice
Keep sealed in original packaging until use.
Store upright in dry indoor environment.
| Attribute | Description |
|---|---|
| Part Name | Dual H Air Control Valve / Twin H-Type Pneumatic Leveling Valve |
| Common Names | Double H Valve, Cab Height Control Valve, Air Suspension Regulating Valve |
| Function | Controls inflation/deflation of air springs to maintain or adjust driver cab height |
| Operating Principle | Mechanically linked to cab suspension; adjusts air pressure based on load and position |
| Control Type | Pneumatic pilot valve with mechanical linkage feedback |
| Number of Ports | 6–8 ports (standard configuration): • 1 × Air Inlet (from reservoir) • 2 × Outlets (to left/right airbags) • 1 × Exhaust port • Pilot signal lines |
| Working Pressure | 0.7 – 1.0 MPa (7–10 bar) — standard truck air system pressure |
| Material | |
| • Body: High-strength die-cast aluminum alloy or brass | |
| • Seals: NBR (nitrile rubber) or FKM (fluoroelastomer) for oil resistance | |
| Temperature Range | -40°C to +80°C (suitable for extreme climates) |
| Mounting Position | Mounted under the driver's cab, connected via lever arm to rear suspension |
| Flow Rate | High-flow precision metering for balanced lift/lower speed |
| Condition | New (OEM original or premium aftermarket) |
Name1
Name2
Verify Compatibility Before Purchase
Confirm your truck model (especially X3000 vs F3000) and whether your cab has air suspension.
Check if the existing system uses mechanical linkage or electronic sensors.
Professional Installation Recommended
Air supply line (from main reservoir)
Airbags (left and right)
Mechanical linkage rod (from rear suspension)
Requires connection to:
Misalignment causes incorrect leveling.
Ensure Clean Air Supply
Install after an air dryer and filter.
Moisture or dirt can clog internal passages and damage seals.
Adjust Linkage Arm Correctly
The lever arm must move freely and return to neutral position.
Improper length or tension results in inaccurate height sensing.
Check for Air Leaks
After installation, apply soapy water to all fittings — look for bubbles.
Even small leaks reduce system efficiency.
Use Proper Fasteners
Replace old O-rings, gaskets, and thread sealant.
Use Teflon tape or aviation-grade thread locker on threaded connections.
Avoid Over-Pressurization
Do not exceed 1.0 MPa (~145 psi).
Excessive pressure damages diaphragms and airbags.
Inspect Regularly
Cracks in housing
Corroded connectors
Worn or stiff linkage joints
Look for:
Lubricate pivot points annually.
Do Not Modify Internally
Internal components are factory-calibrated — do not disassemble unless replacing entirely.
Storage Advice
Keep sealed in original packaging until use.
Store upright in dry indoor environment.
