ZSPQ pneumatic piston mechanism by the cutting-off valve and pneumatic piston actuator components. Cutting mechanism adopted through single-seat form, DN20 single spool guides, DN25 ~ 200 spool double-oriented, has a simple structure, easy to operate, reliable, fast switching characteristics. Mainly used no impurities, no particles of liquid, gaseous media, requiring rapid shut tight, fast emptying of the automatic control system. Products comply with GB / T4213-92. Main parts and materials Part Name Material Body, bonnet ZG270-500, ZG1Cr18Ni9Ti stem, the valve V-type PTFE packing 1Cr18Ni9 Seal 1Cr18Ni9 asbestos clip worm 45 O-ring rubber with a compression spring 60Si2Mn stand HT270 Worm boxes, worm gear, cylinder, bearing caps, pistons HT200 2Cr13 putter models, specifications ZSPQ pneumatic quick shut-off valve category room temperature type soft seal hard seal medium temperature high temperature low temperature model ZSPQ-40 ZSPQ-40G ZSPQ-40G ZSPQ-40D specifications DN20 ~ 200 technical parameters and performance indicators The main technical parameters of the cutting mechanism nominal diameter mm 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 Seat diameter mm 26 43 43 52 62 79 94 115 145 166 216 with the company Production negotiate rated flow coefficient Kv 6.5 10 15 25 40 65 100 150 260 350 540 Nominal pressure MPa 4.0 (JB / T79 · 2-94) Stroke mm 16 25 40 60 Medium temperature ℃ -16 ~ 150 (room temperature); - 60 - 450 (medium temperature); - 60 to 550 (high temperature); - 250 to 60 (low temperature); two quick opening flow characteristics enforcement agencies ZSD-D ZSD-3 ZSD-5 ZSD-7 flange sizes, types according to JB / T79 · 2-94 recessed (often, in the heat); by JB / T79 · 3-94 tenon slot (hypothermia) Body material ZG270-500; ZG1Cr18Ni9Ti; ZG0Cr18Ni12Mo2Ti piston actuator main technical parameters Model ZSD-D ZSD-3 ZSD-5 ZSD-7 Piston diameter mm 150 200 300 400 Effective area cm2 175 305 700 1245 stroke mm 16 25 40 60 intake hole thread M16 × 1.5 M20 × 1.5 M24 × 2 Maximum output power N 7200 12800 29300 5200 Accessories can be equipped with air filter pressure reducer, to secure his position valve, limit switch, valve position transmitter, solenoid valve, hand wheel and other operating air pressure KPa 500 pneumatic shut-off valve performance nominal diameter mm 20 25 32 40 50 65 80 100125150200 leakage drops / min soft seal 0 hard seal 13,579 off time S 1 ~ 2 2 ~ 4 rated stroke deviation% +10 Note: The test medium is water leakage allow pressure MPa