Pneumatic PTFE Butterfly Valve

Pneumatic PTFE Butterfly Valve

Product model: D671F
Nominal diameter: DN50 ~ 1200mm
Nominal pressure: 0.6~1.6MPa
Body material: ductile cast steel, cast steel, alloy steel, stainless steel
Applicable temperature: -30 ~ +70℃
Applicable medium: air, water, sewage, steam, gas, oil, etc
Design standard: GB/T2238-1989
Flange connection size: GB/T9113.1-2000, GB/T9115.1-2000, JB78
Structure length: GB/T12221-1989
Pressure test: GB/T13927-1992, JB/T9092-1999

Product overview

D671F Pneumatic PTFE Butterfly Valve produced and sold by Baigang valve group by the PTFE seal and stainless steel valve plate, stem composition. Pneumatic PTFE sealing butterfly valve for temperature ≤ 150 ℃, weak corrosion or cleanliness requirements of a certain conditions, in food, medicine, chemicals, petroleum, electricity, paper and other water supply and drainage, gas pipeline for regulating the role of flow and interception of the media . 

 AT pneumatic PTFE butterfly valve main features 
 1, a new design, reasonable, unique structure, light weight, quick opening and closing. 
 2, torque is small, easy to operate, labor-saving smart. 
 3, can be installed in any locations, easy maintenance. 
 4, seals can be replaced, sealing performance and reliable two-way seal to achieve zero leakage. 
 5, sealing material aging resistance, corrosion resistance, long life and other characteristics.


Main technical parameters

1, the valve body

Body form Straight-through casting body
Nominal diameter DN50 ~ 1200mm
Nominal pressure PN 0.6, 1.0, 1.6 MPa
Flange standard GB, JB, HG, ANSI, JIS
Connection Type Clip, flange type
Gland type Integrated
Sealed packing V-type PTFE filler, flexible graphite filler


 2, the valve parts

Valve plate form Vertical plate (butterfly)
Flow characteristics Switch type: Linear; Adjustable: approximation and other white points


 3, the implementing agency

Actuator model GT series, SR series, AT series, AW series of single-and double-acting pneumatic actuator
Supply pressure 400 ~ 700KPa
Air source interface G1 / 4 ", G1 / 8", G3 / 8 ", G1 / 2"
Ambient temperature -30 ~ +70 ℃
The role of form Single-acting actuator: Off Gas formula (B) - loss of gas when the valve opening (FO); open air (K) - loss of gas when the valve closed position (FC) 
       double acting actuator: Off Gas formula (B ) - Leakage valve position to maintain (FL); open air (K) - loss of valve position to maintain (FL)
Can be equipped with accessories Positioner, Solenoid valve, Air filter pressure reducer, Relief valve, Stroke switch, Valve position transmitter, Hand wheel mechanism, etc.


Main performance indicators

Nominal diameter DN (mm) 50 ~ 2000
Nominal pressure PN (MPa) 0.6 1.0 1.6
test pressure Strength test 0.9 1.5 2.4
Seal test 0.66 1.1 1.76
Gas seal test 0.6 0.6 0.6
Suitable media Air, water, sewage, steam, gas, oil and so on.
Drive form Manual, worm gear drive, gas drive, electric drive.


Parts materials

Part Name material
Body Ductile cast steel, cast steel, alloy steel, stainless steel
Butterfly plate Gray cast iron, ductile cast steel, cast steel, stainless steel and special materials
Sealing ring PTFE, PTFE
Valve stem 2Cr13, stainless steel
filler O-ring


Shape connection size

Nominal diameter 
         (mm) 		50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000
L 90 90 100 115 130 140 150 250 270 290 310 330 350 390 430 470 500 550
L1 43 46 49 56 64 70 71 76 83 92 102 113 127 154 165 190 203 216
H Flanged 63 70 83 105 115 137 164 206 230 248 289 320 343 413 478 525 585 640
Clip-on 63 70 83 105 115 137 164 206 230 248 289 320 343 413 478 525 585 640
n-φd 4-18 4-18 8-18 8-18 8-18 8-22 12-22 12-26 12-26 16-26 16-30 20-30 20-33 20-36 24-36 24-39 28-39 28-42
H1 According to the allocations of implementing agencies may be
A Depending on the torque required by the valve, the configuration of different models, dimensions are not the same
D 165 185 200 220 250 285 340 405 460 520 580 640 715 840 910 1025 1125 1255
D1 125 145 160 180 210 240 295 355 410 470 525 585 650 770 840 950 1050 1170

Note: the size of the table without standard attachment data. The other due to product improvement technical innovation parameters may have some changes, please consult the company's technical department for the latest data.