Haldex Commercial Vehicles is advising customers to be aware of imitation height-control valves designed to appear as if they are genuine Haldex valves.

These fake valves may look the same, but do not match Haldex valves in function, durability or quality, said Haldex. The imitation valves typically exhibit large dead bands, inconsistent time delays, intermittent operation, excessive leakage and are susceptible to temperature variations, the company noted.

Features of genuine Haldex height-control valves include time-delay technology that maintains chassis production and conserves air to increase compressor life; robust die cast zinc body, precision-machined steel and durable plastic components to ensure operation in extreme conditions, the company noted.

Haldex also said their valve comes with ¼ in. fittings; a breakaway arm; is mountable in right or left orientations for ease of installation; and has minimum dead band range to provide control of suspension ride height to maintain critical drive system pinion angles. In addition, the Haldex unit can be equipped with optional dump valves for exhausting air from the suspension.