Relay Valve 4 Port (1) 3/8in Control Port (1) 3/4in Supply Port (4) 3/8in Delivery Ports Part number: EM52530 OE MFG: SEALCO AIR CONTROLS, INC. OEM Reference: 110415 Cross Reference: FREIGHTLINER TRUCK PARTS : SLC110415; OTHER : 110415, E-SL110415, S-17740 Product Class: Air Valves & Kits The PAI EM52530 is a four-port relay valve identified as an Excel Sealco 110415 component. Relay valves are heavy duty diesel truck parts that use a control signal to route compressed air through a vehicle air-brake system, allowing brake circuits to respond from a nearby air supply. Its configuration includes one 3/8-inch control port, one 3/4-inch supply port, and four 3/8-inch delivery ports, details that distinguish the valve's connection layout. The OEM reference is Sealco Air Controls 110415, with Freightliner SLC110415 and E-SL110415 as additional cross-references.
