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Metal Diaphragm Control Valve

Metal 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

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°
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.

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