Pilot operated SDP The SDP surplussing valve is particularly suited to steam and industrial gas applications providing minimum upstream pressure control. The SDP control system monitors upstream pressure. Should this pressure fall as a result of an overload, the SDP closes, reducing the flow to maintain the supply. Technical specification Sizes DN15 to DN80 PN40 End connections Flanged ASME (ANSI) 150 and 300 JIS / KS 20 Body materials Steel Stainless steel Maximum temperature 300°C Maximum body PN40 design rating Control pressure range 0.2 to 24 bar For further technical information, search our website using product designation SDP