World American WAKN28520 Air Brake Relay Valve Type RG2 / 2-PORT 1/2"S&D RG3 - Replaces Haldex KN28520, Meritor RKN28520, Wabco 9732880060, Velvac

World American WAKN28520 Air Brake Relay Valve Type RG2 / 2-PORT 1/2"S&D RG3 - Replaces Haldex KN28520, Meritor RKN28520, Wabco 9732880060, Velvac

Precision-manufactured World American RG-3 relay valve for heavy-duty brake systems; designed with 5.5 PSI crack pressure and 90° control port configuration for reliable air pressure control. Dual 1/2" NPT delivery ports and reservoir ports ensure optimal airflow and fast response in 2-port brake setups; built to handle high-duty cycles under harsh operating conditions. Features 0.25" NPT control port, 0.5" NPT supply ports, and total dimensions of 3-1/2" x 3-5/8"; mounting center-to-center spacing is 1.5" with 0.35" mounting holes. Durable, corrosion-resistant construction suited for air brake systems in commercial trucks and trailers; thread type: NPT, core group: 225. Includes (1) relay valve; direct replacement for OE and aftermarket part numbers from Haldex, Wabco, Meritor, Freightliner, Velvac, Euclid, Automann, and others.