... : 2" - 128"2) Rating: 150lbs-600lbs, PN6~PN1003) Material: cast steel, stainless steel,cast iron, ductile iron4) Operation: hand wheel, worm gear, electric actuator ... butterfly valve and Lug butterfly valve .The material for cast steel, stainless steel and the standard for AISI,DIN,BS,JIS, with different ...