Relay Valve for Sinotruk HOWO

- OEM standard replacement: Perfectly matches HOWO original size and interface, direct fit
- Fast brake response: Accelerates air charging and exhausting, reduces brake lag
- Premium material: High-strength die-cast aluminum body, wear-resistant & pressure-resistant
- Super sealing: High-density rubber seals, no air leakage, long service life
- Stable performance: Works reliably under 0.6–0.8MPa, suitable for harsh conditions
- Easy installation: Standard ports & mounting holes, no modification needed

Product Parameters

- OEM Numbers: WG9000360524, WG9000360134

- Size (L×W×H): 110mm × 100mm × 85mm

- Port thread: M22×1.5 / 1/2" NPT

- Working pressure: 0.6–0.8MPa

- Temperature range: -40°C to +80°C

- Net weight: 0.85kg

- Material: Die-cast aluminum alloy + rubber seals

- Port type: 4 ports (control, inlet, outlet, exhaust)

- Certification: ISO9001

Product Introduction

This relay valve is a critical pneumatic component in the HOWO air brake system, used to control rapid air delivery to the rear axle brake chambers. It solves brake delay caused by long air lines by allowing air from the reservoir to flow directly to brakes, greatly shortening response time and improving braking efficiency.

Made of high-strength aluminum with precision machining, it features stable pressure output, quick exhaust, and strong anti-corrosion. Each unit passes 100% air tightness and durability tests to ensure reliable performance under heavy-duty conditions.

Applicable Models

- Sinotruk HOWO 336, 371, 380, 420 HP

- HOWO A7, T7H, TX, N5G, N7G

- HOWO 6×4, 8×4 tractors, dump trucks, cargo trucks

- Sitrak C5H, C7H, Hohan N series