A, product uses throttle stop the vent valve throttle stop Features vent valve for closed-circuit device is widely used in the oil, natural gas, coal gas, liquefied petroleum gas, and refining, airports, chemical, oil and gas storage and transportation pipeline, the valve is a new type of throttle closing, shorting product, the valve using the the cage fans Legion throttle, multistage throttle, throttle effect, reliable sealing, convenient operation and maintenance features 2 valves with double reliable sealing sealing (hard, soft seal), The air scour Carbide cover can be more resistant, wear-resistant, double seal can do zero leakage under the conditions of high-pressure gas medium. Long service life valve, the taper seal the sealing surface of the valve seat, conducive valve own cleaning attached to the clapper valve sealing surface dirt the balance hole set, piston seals, to ensure the full opening / closing The dropout stable operation, turned on the light and flexible, hoist torque small 5 vent valve and double-acting throttle stop and throttle at the same time separate role throttle parts with the sealing surface with throttle and closing (sealing zero leakage), washed, double-acting throttle stop valve also has a multi-level throttling the throttle pressure difference, the throttle can be applied to high pressure and deadline 7, fillers with a self-sealing ability to reduce the flow of seal V-shaped packing structure, without adjustment, open, the closing very lightweight. Stuffing box with seal oil into the structure, reliable sealing performance of the valve packing 8, the valve can replace the packing line maintenance, pipeline Pressure wearing parts of the valve at the bottom of the valve set sewage hole, if necessary, to open, clean the dirt from the valve three performance parameters Model working pressure (MPa) Applicable Temperature (℃) applies to medium body material FJ41-16 1.6 ≤ 350 water, steam, oil, etc. carbon steel FJ41-25 2.5 FJ41-40 4.0 FJ41-64 6.4 FJ41-100 10.0 FJ41-160 16.0 IV throttle stop vent valve shape and connection dimensions PN (MPa) DN (mm) Dimensions (mm) Weight (kg ) LH H1 D0 1.6 25 216 243 86 180 17 40 230 265 108 250 24 50 230 346 115 250 27 80 310 409 146 300 52 100 350 433 163 300 60 150 480 521 202 350 125 200 600 594 292 350 165 250 730 621 355 400 285 2.5 25 216 243 86 180 17 40 230 265 108 250 24 50 230 346 115 250 27 80 310 409 146 300 55 100 350 433 163 300 66 150 480 521 202 350 140 200 600 594 292 350 180 250 730 621 355 400 310 4.0 25 216 243 86 180 20 40 230 265 108 250 29 50 230 346 115 250 32 80 310 409 146 300 67 100 350 433 163 300 80 150 480 521 202 350 168 200 600 594 292 350 215 250 730 621 355 400 372 PN (MPa) DN (mm) Dimensions (mm) Weight (kg) LH H1 D0 6.4 25 216 243 86 180 20 40 230 265 108 250 29 50 230 346 115 250 32 80 310 409 146 300 67 100 350 433 163 300 80150480521202 350 168 200 600 594 292 350 215 250 730 621 355 400 372 10.0 25 230 245 78 200 29 40 260 265 106 250 42 50 300 287 110 300 55 80 380 409 152 350 95 100 430 433 169 350 120 150,559,531,225,400 240 200 660 709 321 500 310 250 787 817 399 500 530 16.0 25 230 215 78 200 35 40 260 265 105 250 50 50 300 237 110 300 65 80 390 414 155 350 116 100 450 440 175 350 145