{"title":"Spring brake valves","description":"","products":[{"product_id":"spring-brake-valve-sr-7-k048634","title":"SPRING BRAKE VALVE SR-7 - K048634","description":"The Bendix Spring Brake Valve Sr-7 K048634 is a spring brake modulating valve used with dual air brake systems and spring brake actuators to control parking and emergency brake functions. It provides rapid application of the spring brake actuator during parking and modulates spring brake application through the dual brake valve if the primary service brake circuit fails, while preventing compounding of service and spring forces. The valve incorporates one park control, one service control, one supply, one balance port, four delivery NPTF ports and a downward-facing exhaust port protected by an exhaust diaphragm. Key connections include 1\/4-18 NPT balance, control and park control ports, four 3\/8-18 NPT delivery ports and 1\/2-14 NPT supply and exhaust ports. The unit mounts via two 3\/8-16 UNC-3B studs and operates between -40 �F and 200 �F (-40 �C to 93 �C). With a weight of around 1.3 kg and compliance to FMVSS 121, it suits heavy vehicle brake system service and replacement.","brand":"BENDIX","offers":[{"title":"Default Title","offer_id":49057061470459,"sku":"K048634","price":798.69,"currency_code":"AUD","in_stock":false}]},{"product_id":"sr7-valve-spring-brake-k021578","title":"SR7 VALVE SPRING BRAKE - K021578","description":"The Bendix Sr7 Valve Spring Brake K021578 is a spring brake valve used in heavy-duty truck air brake systems to manage airflow to the spring brake chambers. The valve incorporates anti-compounding to help prevent simultaneous service and park brake application and features a 3\/8 PTC balance port and 3\/8 PTC control port for straightforward plumbing into the air system. Four 3\/8-18 NPT delivery ports provide multiple outlet connections, while the 1\/2-14 NPT supply port and 1\/4-18 NPT park control port support standard air line sizes. The exhaust is oriented facing down and uses an exhaust adapter without silencer to direct exhaust air away from surrounding components. The unit mounts using two 3\/8-16 UNC-2A studs with a stud length of 0.94 inches. Operating temperature ranges from -40 degrees F to 200 degrees F (-40 degrees C to 93 degrees C), with a spring brake hold-off pressure of 107 psi and compliance with FMVSS 121 requirements for air brake performance in commercial vehicles.","brand":"BENDIX","offers":[{"title":"Default Title","offer_id":49057064419579,"sku":"K021578","price":1472.02,"currency_code":"AUD","in_stock":false}]},{"product_id":"spring-brake-valve-r-7-103081","title":"SPRING BRAKE VALVE R-7 - 103081","description":"The Bendix Spring Brake Valve R-7 is a 95 psi spring brake modulating valve used in heavy-duty dual circuit air brake systems to control rear axle spring brakes. This R-7 style valve sits between the service reservoir and the rear spring brakes, modulating air pressure to release or apply the spring brakes and preventing service and spring forces from compounding. It features a solid metal, die-cast style body with NPT threaded ports, including a 3\/8-18 NPT supply port, two 3\/8-18 NPT delivery ports, and 1\/4-18 NPT control and balance ports. The valve mounts via two 0.41 inch holes and incorporates an exhaust port with a dust shield, with the exhaust oriented facing up. Spring brake hold-off pressure is set at 95 psi, and the unit operates reliably in temperatures from -40 �F to 200 �F. Commonly fitted to tractors and trailers, it supports safe spring brake release and emergency\/parking brake application in demanding transport applications.","brand":"BENDIX","offers":[{"title":"Default Title","offer_id":49057069334779,"sku":"103081","price":603.31,"currency_code":"AUD","in_stock":false}]}],"url":"https:\/\/www.tranzmile.com\/collections\/spring-brake-valves.oembed","provider":"Tranzmile - Truck Trailer \u0026 Parts","version":"1.0","type":"link"}