3100X Midland Haldex Mini Relay Valve is used to apply and release the service brakes on a tractor or trailer, with a 2.5 PSI crack pressure and two delivery ports. A relay valve sits close to the brake chambers and, on a small control signal, opens to feed air from a nearby reservoir straight to them. That speeds up both application and release at the rear, because air no longer has to travel the whole length of the vehicle each time. Reservoir port is 3/8 in. and the delivery and control ports are 1/4 in. Call us to confirm proper fit for your application.
A refundable core charge of $28.00 applies to this item and will be collected at checkout. The core charge is refunded upon receipt of your returned core, subject to its condition; customer is responsible for return shipping. Call us at (877) 776-4600 for details.
A factory handling fee of $25.00 per order is added at checkout.
Features
Mini relay valve for applying and releasing service brakes on a tractor or trailer
2.5 PSI crack pressure
Two delivery ports, 1/4 in.
Two control ports, 1/4 in.
One reservoir port, 3/8 in.
Relay action feeds air to the brake chambers from a nearby reservoir
Tech Specs
- Reservoir (1): 3/8"
- Delivery (2): 1/4"
- Control (2): 1/4"
- Crack Pressure: 2.5 PSI
