Description
Diaphragm control valve
Diaphragm Valve Type 245-diaphragm valves
The Type 245-1 Pneumatic Control Valve essentially consists of a Type 245 Diaphragm Valve and a Type 271 Pneumatic Actuator Special features include:
1) Valve body manufactured of cast iron or stainless cast steel – Cast iron body with rubber or PTFE lining
2) Valve diaphragm of natural rubber, nitrile, butyl, or of butyl with PTFE protective facing
3) Exchangeable actuator – actuator action reversible without special tools; bench ranges can be changed by varying the number and compression of the installed actuator springs
4) Attachment of pneumatic or electropneumatic positioners and limit switches according to DIN IEC 534 and NAMUR recommendation
5) Handwheel option for the Type 271 Pneumatic Actuator
The Samson valve diaphragm details
Nominal sizes DN 15 to DN 150
Flanges nominal pressurePN 10
Temperatures from –10°C to +150°C
Conversion of valve sizing coefficients:
Cv (in U.S.-gallons/min) = 1.17 Kvs (in m3/h)
Kvs (in m3/h) = 0.86 Cv (in U.S.-gallons/min)
Air-to-open valve with fail-safe action: Fail-close
The springs "close" the valve when the pressure acting on the
actuator diaphragm is reduced or upon air supply failure. The valve
"opens" as increasing pressure opposes the spring force.
Air-to-close valve with fail-safe action: Fail-open
The springs "open" the valve when the pressure acting on the
actuator diaphragm is reduced or upon air failure. The valve
"closes" as increasing pressure opposes the spring force.
Different material are available with cast iron, stainless steel, etc.
Specification
Specifications | |||||||
Nominal size | DN 15 to 150 | ||||||
Characteristic | » linear | ||||||
Leakage rate | Class IV | ||||||
Flanges | According to DIN 2532 | ||||||
Materials × Temperature ranges (WN = Material Number according to DIN) | |||||||
Body material | Material of valve diaphragm | ||||||
Natural rubber (NR) | Nitrile (NBR) | Butyl (IIR) | Butyl with PTFE facing | ||||
Cast iron / rubber lined WN 0.6025 | –10 °C to +70 °C | –10 °C to +80 °C | –10 °C to +110 °C | –10 °C To +150 °C | |||
Stainless steel, WN 1.4581 | |||||||
Cast iron / rubber | –10 °C to +90 °C | ||||||
Cast iron / PTFE lined | - | - | - | –10 °C to +150 °C | |||
Application
Diaphragm control valve are for Final control element for dirty, viscous, and extremely corrosive fluids as well as for fluids containing solid matter.
You may also email to postmaster@wtindustrialeqpt.com for quotations or visit http://www.wtindustrialeqpt.com/valves/ for more information.
