Deltech controls [a division of deltech controls llc, usa] offers top-of-the-line products in pipeline flow control. The delval series 50 [wafer body] and series 52 [lug body] butterfly valves have been developed with extensive application, design and manufacturing expertise. These products are produced by employing modern manufacturing practices under a robust quality assurance system, ensuring consistent product quality and dependable performance. The delval series 50/52 butterfly valves are designed to include state-of-the-art features: stem connection in standard delval sizes or optional sizes to match standard secondary top plate drilling; top plate double drilled to fit iso 5211 dimensions and standard secondary bolt circle dimensions; all handles, gear operators and pneumatic deltorq actuators designed to mount directly to delval valves; nylon pa 12 coated disc option ensures excellent corrosion resistance to several chemical media, also suitable for use in drinking water and non-alcoholic foodstuffs; one piece stem with close tolerance double d drive eliminates the need for disc screws or taper pins; double o-rings are molded in both upper and lower journals providing a superior secondary seal; unique "center-lock" seat design virtually eliminates any seat movement during the seating and un-seating of the disc; and heavy duty square-grooved seat design with moulded o-ring seals to serve as flange gaskets. These valves meet ansi#125 / 150 or other world drilling standards; high strength disc with hand polished disc edge and hubs; precision machined radius on the upper and lower disc hubs is pressed against upper and lower seat sealing faces for achieving primary sealing between disc and seat.
