Description of the selection and technical parameters of pneumatic diaphragm regulating butterfly valve

Pneumatic membrane regulating butterfly valve is a rotary pneumatic regulating valve with small volume, light weight and large rated flow coefficient. It is especially suitable for large diameter, large flow, rich muddy slurry or boiler kiln flue gas control. Pneumatic Adjustable Butterfly Valves This series of products are available in standard, high temperature and sealed versions. When the pneumatic switch is manual, use the side-mounted handwheel mechanism method: pull out the positioning pin, pull the handle up, the worm wheel and the worm mesh, press the positioning pin, and rotate the handwheel to change the flow cross section. When manually switching to pneumatic, the handle can be pulled by the phase.
Technical parameters and performance indicators
Valve body: WCB, HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve plate: carbon steel, 1Cr18Ni9Ti
Long axis: 1Cr18Ni9Ti
Seat: Carbon steel, stainless steel lined with synthetic rubber or reinforced polytetrafluoroethylene
Inner bearing: bronze, stainless steel surfacing, titanium alloy
Filling: polytetrafluoroethylene, flexible graphite
Valve cover: carbon steel
Nominal pressure: 0.1, 0.25, 0.6, 1.0, 1.6, 2.5Mpa
Caliber: 50mm to 1000mm
Leakage level: Level II, Level VI
Flow characteristics: approximate equal percentage
Scope of application
Urban construction, chemical, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection
Detailed technical coefficient
Nominal diameter mm 50 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000
Rated flow coefficient Kv 85 220 340 530 770 1360 2130 3060 4160 5450 6900 8500 12200 16600 21700 27540 34000
Nominal pressure MPa 0.6
Rated angle ° 70
Signal pressure KPa 20～100
Flow characteristics approximate equal percentage
Medium temperature °C -20 ~ 200 (normal temperature); -40 ~ 450 (medium temperature); -40 ~ 600 (high temperature)
Take-over flange Press the JB78-59 clip-on flange connection
Signal connection screw hole M16×1.5
With actuators Film type ZMA-2 ZMA-3 ZMA-4 ZMA-5
Piston type ZSC-45
Body material ZG230-450; 1Cr18Ni9; ZG1Cr18Ni9Ti, ZGOCr18Ni12Mo2Ti
Can be equipped with accessories, handwheels, positioners, air filter regulators, etc.