Direct acting DEP The DEP excess pressure valve (also referred to as a maintaining, backpressure or surplussing valve) is suited to steam, industrial gas and liquid applications. The product terminology reflects its suitability for use on liquid applications a common example of which is pressure overspill on pumped systems. The DEP control system monitors upstream pressure. Should this pressure fall as a result of an overload, the DEP closes, reducing the flow to maintain the supply. Technical specification Sizes DN15 to DN100 Screwed BSP and NPT End connections PN16, PN25 and PN40 Flanged ASME (ANSI) 150 and 300 JIS / KS 10 and JIS / KS 20 Body materials SG iron Steel Maximum temperature 300°C Maximum body PN40 design rating Control pressure range 0.1 to 16 bar EPDM diaphragm to suit application Options Nitrile diaphragm to suit application Soft seat for bubble tight shut-off For further technical information, search our website using product designation DEP