The D641W pneumatic ventilation butterfly
Use and features
This butterfly valve with the valve body the same material processed into the ring, using electric or pneumatic drive. Its application temperature of the body selection, nominal pressure ≤ 0.6MPa, are generally applicable to the industry, metallurgy, environmental protection and other pipe for ventilation to regulate the use of media flows. The main features are as follows:
1, the novel design, reasonable, unique structure, light weight, open and close quickly.
2, the operating torque is small, easy to operate, saving smart.
3, used to adapt materials to meet the low, medium, high medium temperature and corrosive media.
use of standard
Design standards: GB/T12238-1989 JB/T8692-1998
Flange connection dimension: GB/T9115.1-2000
Length of the structure h: GB/T12221-1989
Pressure test: GB/T13927-1992; JB/T9092-1999
The main technical parameters
 
Nominal diameter DN (mm) 50 ~ 2000
Nominal pressure PN (MPa) 0.05 0.25 0.6
Test pressure strength test 0.075 0.375 0.9
Seal test leakage ≤ 1.5%
Applicable to medium gas, dust, gas, flue gas.
Applicable temperature ≤ 300 ° C

The main parts of the material
Part Name Material
Cast steel body, stainless steel, chromium, nickel, molybdenum and titanium steel, chromium, molybdenum and titanium, steel and other special materials
Butterfly, cast steel, stainless steel, chrome-nickel, molybdenum and titanium steel, chromium, molybdenum and titanium steel and other special materials
Ring with the same body
Stem carbon steel, 2Cr13, stainless steel, chromium, nickel, molybdenum and titanium steel
Fill fluorine plastic, flexible graphite 
  
 

· D641W-0.5 CPRV series ventilation butterfly connection size
2.5
6
 
Nominal diameter the length of the structure
(Standard value) Dimensions
(Reference value) connection size
(Standard value) reference value