pneumatic ventilation flanged butterfly valve

technical parameter

item model number: d641w

nominal diameter: dn50~2000mm

pressure range: pn0.05mpa~0.6mpa

applicable temperature: -40～ 425℃

design standard: jb/t8692-1998

structure length: gb/t12221-1989

pressure test: gb/t13927-1992

connection method: flange type

application range: metallurgy, environmental protection, chemical industry

drive mode: pneumatic, regulating valve type, switch type


product detail

product overview

pneumatic ventilation flange butterfly valve is a valve designed for ventilation systems in various industries. it is mainly composed of pneumatic actuators and ventilation butterfly valves. the material selection of the ventilation butterfly valve is determined according to the high temperature and normal temperature used on site. the valve is mainly suitable for ventilation system pipes in metallurgy, environmental protection, chemical industry, power station, glass and other industries. the compressed air is used as the power to accept the industrial signal command, and the valve stem is driven to drive the rotation of the disc plate to complete the switch and adjustment of the valve.


product features

1. the design is novel and reasonable, the structure is unique, and the operating torque is small. and the operation is simple, the switch is dexterous to open and close quickly.

2. the material of the valve can be selected according to the pressure and temperature of the site to meet the normal temperature, high temperature and different temperature conditions.


main performance specifications

nominal diameterdn（mm）50～2000
nominal pressurepn（mpa）0.050.250.6
test pressurestrength test0.0750.3750.9
seal test

≤1.5% leakage

applicable mediacoal gas, dusty gas, flue gas, etc.
applicable temperature-40～ 425℃


material of main parts

part namematerial
bodycast steel, stainless steel, chromium-nickel-molybdenum-titanium steel, chromium-molybdenum-titanium steel and other special materials
disccast steel, stainless steel, chromium-nickel-molybdenum-titanium steel, chromium-molybdenum-titanium steel and other special materials
seal ringsame as valve body
stemcarbon steel, 2cr13, stainless steel, chromium nickel molybdenum titanium steel
packingfluoroplastic, flexible graphite


main connection size

nominal diameterstructure lengthdimensions (reference value)connection size (standard value)wt（kg）
0.05mpa,0.25mpa0.6mpa
mminlhh1add1n-ddd1n-d
502108703371801401104-141401104-1416
652-1/2112803571801601304-141601304-1417
803114953851801901504-181901504-1819
10041271054051802101704-182101704-1822
12551401204832452402008-182402008-1827
15061401325082452652258-182652258-1831
20081521605662453202808-183202808-1847
2501016518762324537533512-1837533512-1868
3001217822075035544039512-2244039512-2279
3501419024580335549044512-2249044512-22130
4001621627085235554049516-2254049516-22141
4501822229790735559555016-2259555016-22190
5002022932296035564560020-2264560020-22225
60024267377108055075570520-2675570520-26245
70028292430118555086081024-2686081024-26320
80032318487130055097592024-3097592024-30405
9003633053714005501075102024-301075102024-30500
10004041058715005501175112028-301175112028-30700
12004847070218256001375132032-301405134032-33750


recommend

electric forged high pressure

electric high temperature and

stainless steel globe valve

emergency cut-off ball valve

api butterfly valve

cns cast steel gate valve