{"product_id":"sealco-sc110139x-relay-valve","title":"Sealco SC110139X Relay Valve","description":"\u003cdiv\u003e\u003cp\u003eThe Sealco SC110139X Relay Valve is a four-delivery-port service relay valve used in heavy‑duty air brake systems to feed brake chambers from the supply line while regulating control pressure to the actuators. It features four 3\/8\" delivery ports, a 3\/8\" control port, a 3\/8\" auxiliary supply port, and a 3\/4\" reservoir port, with a nominal crack pressure of 4.5 psi. Built from corrosion‑resistant aluminum (with brass components as applicable) and manufactured to Sealco’s OE specifications, this valve presents a 1:1 pressure relationship in normal operation and includes a ratio mode intended to enhance braking response in hard-stop scenarios. The SC110139X is a genuine Sealco part (often listed alongside 110139\/110139X variants) and is commonly cataloged in Meritor and aftermarket networks under SEL110139 or BEN110139X. It is designed for reliable service in commercial vehicle braking systems and supports standard 3\/8\" lines for control and supply, a 3\/4\" line for reservoir sensing, and 4 x 3\/8\" outputs to brake actuators.\u003c\/p\u003e\u003c\/div\u003e","brand":"SEALCO","offers":[{"title":"New","offer_id":46283518247146,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-020.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/sealco-sc110139x-relay-valve","provider":"GTG Hardware","version":"1.0","type":"link"}