Superior structure: UNIFORM low flow resistance flow channel, rated flow coefficient adjustment is good: big adjustable range, or equal percentage flow characteristic optional linear tightness: choose soft seal, bellows seal, widely used to improve sealing performance : a variety of seat structures, fins, meet different technical parameters pressure temperature operation mode the open air, air-to-close seat structure M sleeve flow characteristic Equal percentage, linear adjustable range of 50: 1 signal range Pr: 0.2 ~ 1bar, 0.4 ~ 2bar air pressure Ps: 1.4bar ~ 4bar seal level Ⅲ, Ⅳ, Ⅴ, Ⅵ ambient temperature of -30 ℃ ~ + 70 ℃ (Explosion proof See Locator parameters) Performance standards GB / T4213-92 basic error of ± 2.5% 1.5% hysteresis OFF signal valve fully open, the output signal 4 ~ 20mA DC, 0 ~ 10V DC CLOSED implement this performance indicators GB / T4213-92 standard electrical positioning parameters (not considered a user-supplied) Input signal 4 ~ 20mA DC, 0 ~ 10V DC input impedance of 300Ω, 250Ω, subject to the positioner output signal 4 ~ 20mA DC, 0 ~ 10V DC Explosion levels dIIBT4 / T5 / T6, dIICT4 / T5 / T6, intrinsically safe Body parameter nominal PN10, PN16, PN40, PN64 flange connection, (special: welded) Body Material WCB, SS304, SS316, SS316L 1Cr18Ni9Ti Spool Material SS, SS304, SS316, SS316L, Stellite heap 1Cr18Ni9Ti welding sealing material PTFE, hard seal, a special high-temperature materials Bellows SS, SS304, SS316 1Cr18Ni9Ti packing PTFE, flexible graphite putter liner rubber asbestos gaskets 2Cr13 1Cr18Ni9Ti, 1Cr18Ni9Ti asbestos spiral wound gasket flange standard GB9113- 88, JB / T79-94, GB2555-81 room temperature type -20 ℃ ~ 250 ℃ Fluid temperature heat resistance -60 ℃ ~ 450 ℃ high temperature 300 ℃ ~ 560 ℃ low temperature -200 ℃ ~ -250 ℃ features attachment options E- Explosion-proof (explosion-proof electrical Locator grade optional: flameproof, intrinsically safe) X- band signal feedback (electric positioner with feedback or reprovision position transmitter) S- Q- complete with hand wheel cut-off Accessories: Electrical locator, air filter regulator, air lock to secure his position valve, solenoid valve www.electricvalve.cn three-way solenoid valve http://www.electricvalve.cn/santongdiancifa/ gas solenoid valve http: // www. electricvalve.cn/ranqidiancifa/