Haldex, maker of height control valves (HCVs) for truck and trailer air suspension, warned that imitation height control valves have been designed to appear to be the same as genuine Haldex height control valves in order to lead you to believe that they’ll perform the same. However, they don’t match Haldex in the critical areas of function, durability and quality, the company said. Imitation valves typically exhibit large dead bands, inconsistent time delays, intermittent operation, excessive leakage and are highly susceptible to temperature variations, Haldex continued.
The manufacturer noted that the genuine Haldex height control valve features:
• Time delay technology to maintain chassis production and conserves air to increase compressor life.
• Robust die-cast zinc body, precision machined steel and durable plastic components to insure operation in extreme conditions.
• Valve comes with 1/4-in. fittings, breakaway arm and can be mounted in right or left orientations for ease of installation.
• Minimum dead band range provides control of suspension ride height to maintain critical drive system pinion angles.
• Valve can be equipped with optional dump valves for exhausting air from the suspension.