The Midland Haldex KN28531X is an RG2 relay valve designed for fast application and release of service brakes on tractors and trailers. The control port is positioned at 0°, placing it in line with delivery port D. Port sizes are 1/2" on Supply A, 3/8" on Supply B, and 3/8" on both Delivery C and Delivery D. Cracking pressure is 5.6 ± 1.0 PSI. Two mounting holes measure .34" diameter on 1.50" centers. The valve housing measures 3-1/2" wide by 3-1/2" long by 3-5/8" tall. The cover can be rotated without affecting performance. OEM cross-reference is N30108BH. A genuine Midland Haldex part, sold by Pro Gear and Transmission. Call us to confirm fit for your application.
A refundable core charge of $50.40 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.
Features
RG2 relay valve for fast application and release of tractor or trailer service brakes
Control port: 1/4", positioned at 0° (in line with delivery port D)
Cracking pressure: 5.6 ± 1.0 PSI
Supply A: 1/2"; Supply B: 3/8"; Delivery C and D: 3/8"
Two mounting holes: .34" diameter on 1.50" centers
Cover is rotatable without affecting performance; one 1/2" plug included
Tech Specs
- Supply A 1/2"
- Supply B 3/8"
- Delivery C 3/8"
- Delivery D 3/8"
- Control Position 0° (in line with Delivery Port D)
- Control Port 1/4"
- Cracking Pressure 5.6 ± 1.0 PSI
- Mounting Holes (2) .34" diameter on 1.50" centers
- Width 3-1/2"
- Length 3-1/2"
- Height 3-5/8"
- Plugs Included 1 @ 1/2"
- OEM Part Number N30108BH
- Core Group 225
