A Multiple Circuit Protection Valve is part of a vehicle’s built-in compressed air supply system. It is a first port for two different service brake systems and part of the primary and secondary brake circuit. The second brake port is a parking brake and protected by an overflow valve. The valve has two surfaces which protect inflow and outflow pressure. The pressure from the surfaces help to counter the force either open or to hold open the overflow valve.
The vast majority of passenger vehicles do not use a compressed air system for braking. However, the system is used in commercial vehicles. in trucks, semi-trailers, buses, etc. all use compressed air braking systems. A vehicle using the system often has a distinct air pressure sound each time the brakes are applied. That’s a way of telling if your vehicle uses such a system. If you experience bad brakes or no air pressure, it could be a problem with the Multiple Circuit Protection Valve in which case get it examined by a professional mechanic prior to buying a replacement part.
We sell an assortment of spares for commercial and private vehicles. This means that you’ll have no problem finding a replacement Multiple Circuit Protection Valve for your vehicle. However, to find the right part, please search 123spareparts.co.uk using the part number of the original part. You’ll find most parts available at a discounted price when buying from us.