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Original Shaanqi HOWO Dongfeng FAST Gearbox Parts F99660 Double H Valve F99660

Shaanqi HOWO Dongfeng FAST Gearbox Parts F99660 Double H Valve F99660

The Part Number F99660 is a Dual H-Type Air Valve (commonly referred to as a "Double H Valve" or Dual Manual Control Valve), designed for use in the pneumatic braking and auxiliary air systems of heavy trucks, buses, and specialized vehicles. This valve serves as a manual override or control unit that allows the operator to independently manage two separate air circuits — typically used for parking brake release, trailer brake control, axle engagement, or air suspension leveling.

Featuring an ergonomic dual-lever "H-shaped" configuration, this valve enables simultaneous or individual operation of two 3/2-way pneumatic paths, offering precise and reliable control under various operating conditions. It is widely installed on Chinese-made commercial vehicles such as Dongfeng, Foton, Sinotruk, and King Long, especially those equipped with dual-line air brake systems.

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Model:
F99660
Brand:
Dongfeng

Product Description

Attribute	Description
Product Name	Dual H-Type Air Valve / Double Manual Control Valve
OEM Part Number	F99660
Function	Manually controls two independent pneumatic circuits
Valve Type	Dual 3/2-Way Pneumatic Directional Valve (H-pattern)
Operation Method	Twin manual levers (spring return or detent position options)
Application	Parking Brake System, Trailer Brake Control, Axle/Air Suspension Management
Control Positions	Each side: Apply – Neutral – Release (3-position)
Mounting Style	Panel-mounted (dashboard or console) with flange or bracket
Sealing Material	Nitrile Rubber (NBR) or HNBR for oil and temperature resistance
Protection Rating	IP65 – Dust-tight and protected against water jets

Parameter	Specification
Operating Pressure Range	0.5 MPa – 0.8 MPa (72–116 psi)
Nominal Port Size	G1/4" BSP/NPT (standard for both inlet and outlets)
Number of Ports	2 Inlets (P1/P2), 4 Outlets (A1/B1, A2/B2), 2 Exhausts (E1/E2)
Working Medium	Clean, dry compressed air
Temperature Range	-40°C to +80°C (-40°F to 176°F)
Flow Path Configuration	Dual 3/2-way directional control (independent channels)
Actuation Type	Manual lever with tactile feedback and positive lock positions
Leakage Rate	< 3 cm³/min per circuit at max pressure
Cycle Life	≥ 100,000 operations
Body Material	Reinforced engineering plastic or die-cast aluminum alloy
Compliance Standards	Meets QC/T 1145-2019, GB16919, ISO 5782-1