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Investors Relations & Haldex information

Relay Valve

Part no. KN28531
item status Active
Product line Haldex
RG2 Relay Valve
  • A fast relay used to apply and release service brakes on tractor or trailer.
  • Cracking pressure: 5.6 +/- 1.0 PSI.
  • Compact size.
  • Control Port 1/4".
  • Two port delivery.
  • Two mounting holes, .34 diameter on 1.50" centers.
  • Cover may be rotated without affecting warranty or performance.
  • Approximate Weight: 1.5 lbs.
  • Picture illustrates 90° control port position. 0° would locate port in line with delivery port "D".
  1. Repair Kit use part number RN10HM.
25 standard packs in stock
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Cancer and
Reproductive Harm

Technical specs

Supply A 1/2"
Supply B 3/8"
Delivery C 3/8"
Delivery D 3/8"
Control Position
Plugs Included 1 @ 1/2"
OEM Part Number N30108BH
Core Group 225
Width 3-1/2"
Length 3-1/2"
Height 3-5/8"
Contol Port 1/4"
Cracking Pressure 5.6 ± 1.0 PSI
Mounting Holes (2) .34" diameter on 1.50" centers
Approximate Weight 1.5 lbs.

Related aftermarket part(s)

Part No


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