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Over the last 65 years, Sealco evolved from a small screw machine shop to become the primary supplier of air brake valve products to the commercial trailer market in North America. As the industry leader, Sealco's valves are used as the production standard at over eighty-five percent of the approximately six hundred twenty-five trailer OEMs in North America. We export to thirty-four countries around the world. There are literally millions of trailers on the road today utilizing Sealco air brake or suspension valves.

   
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      Commonly used inside tractor cab to operate trailer brakes. All ports are 1/4" NPT threaded.    
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      These valves are designed to boost and accelerate the control signal for trailers with slow brake systems or low timing thresholds. They are common on very long trailers, large multiple axle trailers, and trailers or dollies designed to tow other trailers. The Dolly Control Line Valve is of similar design and function.    
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      It is used to protect the air brake system in case of failure of an attached accessory.    
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      Commonly used as dash valve inside tractor or truck except 17600B which is used outside on dollies & trailers.    
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      These valves quickly exhaust delivery pressure when the supply line pressure to the inlet port drops. They are commonly used to release large air volumes from devices such as air suspension bags.    
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      A Relay Emergency Valve are used on vehicle axles with service chambers only. They are designed to fill the reservoir(s), apply and releases the service brakes, and apply and releases emergency/park brakes when necessary. Come in 'Charging' and 'Non-Charging' designs.    
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      Two way check vales select the highest pressure stream from the inlet ports and channel this to the outlet port or ports. Commonly used between air reservoirs which are merged together or between foot valve delivery ports to provide for trailer control.    
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      Sealco Catalog ALL Flyer Sealco R05 sealco 2018 20171112    
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      Repair kits are available for most Sealco part numbers    
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