Delval flow controls [a division of deltech controls llc, usa] provides pneumatic rack and pinion actuators. These pneumatic rack & pinion actuators are made up of dual rack and pinion, opposed piston, symmetrical mounting, pneumatic valve actuators for quarter turn valve automation; torque output range [@ 5.5 bar input pressure] - double acting 1900 nm [16885 lb-in]; and single acting 526 nm [4652 lb-in]; temperature range - with buna "c" sealing - -30ºc to + 100ºc max, with viton sealing - -20ºc to +200ºc max and with silicon sealing - -50ºc to + 180ºc max; standard material options - body in hard anodized, extruded aluminum; end caps - pressure die cast aluminum; pistons - pressure die cast aluminum; shafts - high strength alloy steel enp; springs - din 17223-2 vd si cr with epoxy coating; and fasteners - stainless steel. Key features: two independent external travel stops to permit easy and precise adjustment of 5 degrees in open and close directions; travel stop screws are located on the body, outside the pressure chamber, to prevent accidental blowout of the bolts during adjustment; modular pre-loaded spring cartridges for safe and easy conversion from double acting to spring return at site, with the same end-caps; wide actuator base design can be adapted to mount different valve makes requiring wider than en iso 5211 drilling; and unique manufacturing technique of the "torqdrive" shaft to accommodate various valve stem configurations like double d, diagonal square and parallel square. Accessories that comes with the package for interfacing includes solenoid valves can be direct mounted with the namur interfacing; valve position controllers and indicators can be mounted with the vdi/vde 3845 interfacing.
