Description
Product Overview
Part Name: Air Brake Service Relay Valve
Part Number: 110139
Vehicle Compatibility: Heavy-duty truck and semi-trailer pneumatic service-brake systems requiring the compatible Sealco-style four-delivery-port ratio relay valve.
Configuration: Non-ABS service relay valve with four delivery ports and an integrated ratio feature for compatible multi-axle service brake systems.
Function: Delivers compressed air rapidly from the reservoir to the service brake chambers in response to control pressure, reducing brake-response delay across the controlled axles.
Technical Specifications
Type: Four-Port Service Relay Valve
Manufacturer: Sealco
Control Port: 3/8 in. NPT
Auxiliary Supply Port: 3/8 in. NPT
Reservoir Port: 3/4 in. NPT
Delivery Ports: Four 3/8 in. NPT
Nominal Crack Pressure: 4.5 PSI
Ratio Feature: Yes
SAE J1860 Tag: RD045
Preferred Application: One valve controlling two service axles
System: Heavy-Duty Pneumatic Brake System
Application: Service Brake Air Delivery
Cross-References: Newstar S17736 / Meritor RSL110139 / Haldex 110139X / Automann 170.110139 / Euclid ESL110139
Installation: Confirm original relay-valve number, port sizes, crack-pressure requirement and air-brake plumbing before installation. Do not apply this ratio-feature valve to converter dollies, lift axles or trailer turntable axles.
Delivery & Availability
Stock Options: High-quality aftermarket & genuine-equivalent Sealco-style relay valves available
MOQ: 1
Delivery Time: 3–7 days
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