normally closed/open Pneumatic diaphragm valve
1.Size:1/2"-16"
2.Class:125Lb 150Lb

3.Design:ASME B16.34/API 600
4.Material: iron WCB

Our products are widely used to electric utility industry,and   petrochemical industry.

Purpose:

It’s special for controlling the noncorrosive or the usual corrosive media.Its body inner surface is unlined or lined withdifferent rubbers which can be selected to suit with different workingtemperatures and fluid pipelines.

Suitable temperature:≤85°C,≤100°C,≤120°C,≤150°C(According to the materials of lining and diaphragm)

Materials:

Body    Cast iron,spheroidal graphite cast iron,carbon steel, stainless steel

Bonnet  Cast iron,spheroidal graphite cast iron,carbon steel, stainless steel

Lining     Unlined,rubber

Diaphragm  Rubber

Disc          Cast iron

Stem        Cast iron,stainless steel

Handwheel   Cast iron

Tests:

Lining layer:Electrospark detecting

Test to API598

Nominal pressure:Class(LB)

Body:Lb×1.5

Seal:Lb×1.1

The diaphragm valve is an especial break valve:

1.       The elastic sealed open and close element can avoid the inner leak.

2.       The clipper-built interval channel can keep the small loss of pressure.

3.       It hasn’t the stuffing box,so it doesn’t leak.

4.       The body and bonnet are separated by the middle,diaphragm in order that the bonnet and stem over the diaphragm aren’t corroded by the medium.

5.       The diaphragm is changeable and the expense of main-tenance is low.

6.       The various lining materials can be suitable for kinds of media and feature a high strength and a prominent performance of corrosion resistance.

The pneumatic diaphragm valve can be equipped with the following accessories according to the needs:

1.       Signal feedback device:feed back the open or closed state to the control room by the open or closed degree signal.

2.       Limit device:can limit the maximal aperture of valve in order to realize the flow control.

3.       Localizer:

Localizer of electric-pneumatic valve:input the signal of 4—20mA current to control the open and closed degree in order to realize the flow control.

4.       Sensor of the position of valve :can output the open and closed state of valve in any position bythe signal of 4—20mAcurrent.

5.       Pressure reducing valve:can regulate the air pressure according to the needs.

6.       Electromagnetic valve:can control the change of airflow of pneumatic valve by the signal of current in order to open and close the valve.

7.       The other accessories can be equipped according to the needs.