Wafer type pneumatic butterfly valve

Wafer type pneumatic butterfly valve

Pnuematic butterfly valve introduction

Pneumatic butterfly valve is combined with pneumatic actuators and central line of butterfly valves. The valve stem drive the valve corn rolling 90 in the body which can realize the full

open or full close action. This product can according to the sealing performance into metal

seal and soft seal with compact structure、small volume、reliable operation、good sealing、easy maintenance、installation convenient and the adoptability is strong advantages. Can

be widely used in petroleum、chemical industry、light industry、papermaking industrial、pharmaceutical、car automatic control system on a remote concentrated or local control.

Technical parameters

Body

Nominal size: DN40 -DN1000mm

Body material: WCB、Ductile iron, ss304, 316

Connection type: Wafer type, LT lug wafer type

Pressure class: PN1.0-1.6MPa

Structure type: Midline type

Valve components

Seat sealing:   EPDM: -30~120℃

PTFE: -30℃～180℃

VITON: -30~150℃

                          NBR: -30~80℃

Disc material: Ductile iron nickel plating, nylon coating, aluminum bronze, 304, 316

             316L, 1.4529, 2507

Stem material: 304、SS410

Applicable medium: Water, liquids, gas, oil, powder, steam, acid-base medium, etc.

Design and manufacturing standards

Design and manufacture: GB/T12238/2008

Connection standard: JB/T 79.1-1994

Face to face dimension: GB/T 12221-2005

Pressure testing: GB/T13927-2008

Actuators

Wafer type pneumatic butterly valve

Outline size drawing:

Above for GB PN10 PN16 size figure.

Related pictures

Body material: Ductile iron, disc: SS304, Seal: EPDM sofe seal, Pn16KG

Body material: SS304, disc: SS304, Seal: EPDM sofe seal, Pn16KG

Body material: Ductile iron, disc: SS304, Seal: EPDM sofe seal, Pn16KG 

With pneumatic accessory: Limit switch box (Feedback valve on off position);

Solenoid valve (Reversing air source); 

Air clutch (When air loosing can be use clutch wheel operation the valve to open and closed)

Air filter pressure reduce valve (Stable reduce valve and clean the air source);

Wafer type pneumatic butterfly valve

Body material: SS304, Disc: SS304, Seal: PTFE, Pn16kg

Body material: Ductile iron, Disc: SS304, Seal: PTFE, Pn16kg

Pneumatic actuator working principle:

Double acting (POADA):

(Counterclockwise)

Compressed air to Port 2 forces the pistons outwards, causing the output shaft to turn

counterclockwise, while the air is being exhausted from Port 4.

(Clockwise) Air to Port 4 forces the pistons inwards, causing the pinion to turn clockwise

while the air is being exhausted from Port 2.

Single acting (POASR):

(Counterclockwise)

Compressed air to Port 2 forces the pistons outwards, causing the springs to compress,

the pinion counterclockwise while air is being exhausted from Port 4.

(Clockwise)

Loss of air pressure, the stored energy in the springs forces the pistons inwards,

the pinion turns clockwise, while air is being exhausted from Port 4.