Type E Valve
Spence Type E valves are pilot-operated and have a single-seat design featuring compact construction, balanced metal, flexible diaphragms and the main spring to automatically stop liquid or gas flow at a pressure set point, maintaining safe pressure levels. They come with a 4A bleed port that restricts the flow and pressure built under the diaphragm and a three-valve by-pass to facilitate inspection without interrupting services. The pilot can be mounted on either side of the main valve by using a 1/4 inch nipple and union (provided with the assembly) which easily connects the diaphragm chamber to the desired point of pressure control. They are capable of withstanding a maximum pressure and temperature rating of 600 psig and 600 degrees F, respectively.