standard design features
•straight pattern body
•os & y (outside screw and yoke)
•bb (bolted bonnet)
•rising stem and handwheel
•plug or parabolic disc
•welded-in seat ring
•flanged or buttwelding ends
•fire safety
•uni-direction
production range
•material : carbon steel : astm a216-wcb or equivalent
alloy steel : astm a217-wc6, wc9, c5, c12, c12a or equivalent
stainless steel : astm a351-cf8, cf8m, cf3, cf3m, cn7m, or equivalent
duplex stainless steel : astm a995-1a,2a,4a,5a or equivalent
special alloy steel : inconel 625, incoloy 825, hastelloy c, monel
•pressure rating : asme class 150 to class 2500
•service temperature : up to 500℃
•available size : nps 2″ ~ 24″
•optional operation : manual, electric, pneumatic, hydraulic
design standards
•basic standards : bs 1873/api 623/asme b16.34
•face to face : asme b16.10
•end flange : asme b16.5 & asme b16.47
•buttwelding ends : asme b16.25
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