1. Exported to USA, CANADA, Center American. 2, Good quality, 3.Hard package, 4. 2 Horizontal delivery ports

R-5 relay valve:

1. Delivery port: 2, 3/8 in P.T.

2. Reservoir Ports: 2, 1/2in P.T.

3. Control Port: 1, 3/8in P.T.

4. 6 psig Cracking Pressure

some parts number reference:

PAI/EXCEL: LRV3639/EM36390

BENDIX: BEN 229467

MID: KN28060

NAV: 455975C92

it is suited for Mack truck, and exported to USA, CANADA, Center American market