Flanged vent pneumatic butterfly valve

Body material	WCB,SS304
Disc material	WCB,SS304
Seal mateiral	WCB,SS304
Nominal pressure	PN6, PN10, PN16KG
Flange standard	GB, ANSI, JIS, DIN
Control type	Single acting, double acting
Air supply	3-8bar
Pneumatic accessory	Solenoid valve, limit switch box, positioner, handle wheel, etc

Product parametersSize and dataworking principle

Flanged pneumatic vent butterfly valve

Ventilation pneumatic butterfly valve belongs to midline structure, control type with pneumatic double acting and single acting, using steel plate bending with two flanges welded design and becoming, the edge of the plate and the shell non-contact, leaving a small gap, light torque, simple structure, easily installation. This series product mainly used in chemical industry, building material, power station, glass factory, etc.

Body

Nominal size: DN50-DN300

Body material: WCB, 304, 316

Connection type: Flanged

Pressure class: PN0.6KG

Structure type: The midline structure

Valve components

Seat material: Body seal

Disc material: WCB, 304, 316

Stem material: Stainless steel 410

Applicable medium: Flue gas, dust powder gas, coal gas

Actuators

Pneumatic actuator
Control type	Function
Double acting	Failure to maintain
Single acting normally closed	Failure to close
Single acting normally open	Failure to open
Optional accessory	Solenoid valve, limit switch box, air filter relief pressure valve, positioner, manual device.
ON-OFF type	Feedback: the active signal, passive contact signal, resistance, 4-20mA
Regulation type	Input and output signal: 4-20mA, 0-10v, 1-5v, switch, MODBUS, PROFIBUS field bus
Filed operation	The field, remote control switch regulation and MODBUS, PROFIBUS field bus

Vent pneumatic butterfly valve

Outline size drawing

DN	L	D	H1	H2	P	A
50	108	110	180	100	96	163
65	112	130	190	110	96	163
80	114	150	200	120	96	163
100	127	170	210	130	115	195
125	140	200	230	150	115	195
150	140	225	240	160	137	217
200	152	280	260	180	258	147
250	165	335	310	230	299	165
300	178	395	342	262	299	165
350	190	445	367	287	349	182
400	216	495	373	293	349	182
450	222	550	400	320	349	182
500	229	600	426	346	397	199
600	267	705	483	403	397	199
700	292	810	547	467	473	221
800	318	920	626	546	560	249
900	330	1020	676	596	560	249
1000	410	1120	726	646	601	280

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.