Pneumatic explosion-proof cut-off valve

[Brief Introduction]

Explosion proof pneumatic ball valves are composed of pneumatic actuators and precision cast high platform ball valves. They are powered by purified dry compressed air and receive gas signals or electrical valve positioners, solenoid valves, and other accessories to work with electrical signals. They have the characteristics of compact overall structure, quick opening and closing, simple operation, and good reliability.

Overview of Explosion proof Pneumatic Ball Valve:

Explosion proof pneumatic ball valves are composed of pneumatic actuators and precision cast high platform ball valves. They are powered by purified dry compressed air and receive gas signals or electrical valve positioners, solenoid valves, and other accessories to work with electrical signals. They have the characteristics of compact overall structure, quick opening and closing, simple operation, and good reliability.

Design characteristics of pneumatic explosion-proof ball valve:

Fire resistant structural design

The ISO 5211 platform design facilitates the installation of automatic switch devices

Anti static device between valve stem and valve body

Design of valve stem explosion-proof device

Application standards for pneumatic explosion-proof ball valves:

Design and Manufacturing: GB/T12237, ANSI B16.34, API 608

■ Structural length: GB/T12221, ASME B16.10, JIS B2002

■ Flange dimensions: GB/T9113, ASME B16.5, JIS B2212/JIS B2214

Inspection and Testing: GB/T13927

Fire Test: API 607 4th 1993

Wall thickness: ASME B16.34

Working principle of pneumatic explosion-proof ball valve

Double acting pneumatic actuator

Pneumatic ball valve opens: 2-port intake and 4-port exhaust, pushing the two pistons apart to move to both sides, and the output shaft rotates counterclockwise

Pneumatic ball valve closed: 4-port intake, 2-port exhaust, push the two pistons to close towards the center, and the output shaft rotates clockwise

Single acting pneumatic actuator

Pneumatic ball valve opens: 2-port intake and 4-port exhaust, pushing the two pistons apart to move to both sides, while compressing the spring, the output shaft rotates counterclockwise

Pneumatic ball valve closed: When there is a loss of air or power, the spring pushes the two pistons to close and move towards the center, and the output shaft rotates clockwise

Pneumatic explosion-proof ball valve parameters

pneumatic actuator	Double acting, single acting
Drive gas source	5-7 bar compressed air
Pneumatic accessories	Limit switch, locator, solenoid valve Filter pressure reducing valve, handwheel mechanism
Nominal Diameter	DN15-250mm
nominal pressure	1.6-4.0MPa
Temperature	PTFE:-30~+180℃ PPL:-30~+250℃
Connection method	flange
body material	304、316、316L、WCB
Valve plate material	304、316、316L、WCB
Valve seat lining	PTFE、PPL
Applicable Medium	Steam, water, gas, etc

aerodynamicMaterial of main components of ball valve

name	Material (Material Code)
	C	P	R
Left valve body	WCB	ZG1Cr18Ni9Ti	ZG0Cr18Ni12MO2Ti
Right valve body	WCB	ZG1Cr18Ni9Ti	ZG0Cr18Ni12MO2Ti
Ball core	WCB	1Cr18Ni9Ti	0Cr18Ni12MO2Ti
sealing ring	Polytetrafluoroethylene (F) or high-strength composite polytetrafluoroethylene (PPL)
filler	Polytetrafluoroethylene or flexible graphite

Pneumatic ball valve GB national standard data

Diameter (mm)	inch	Pressure (Mpa)	Size (mm)
			L	D1	D2	D3	D4	T	H	n-¢m
15	1/2	1.6 2.5 4.0	130	15	46	65	95	14	48	4-14
20	3/4		130	20	56	75	105	16	53	4-14
25	1		140	25	65	85	115	16	58	4-14
32	1 1/4		165	32	76	100	140	18	71	4-18
40	1 1/2		165	38	84	110	150	18	76	4-18
50	2		203	50	99	125	165	20	85	4-18
65	2 1/2	1.6	222	64	118	145	185	20	101.5	4-18 8-18
		2.5/4.0						22
80	3	1.6	241	76	132	160	200	20	111.5	8-18 8-18
		2.5/4.0						24
100	4	1.6	305	100	156	180	220	22	140	8-18 8-22
		2.5/4.0				190	235	24
125	5	1.6	356	125	184	210	250	22	183	8-18 8-26
		2.5/4.0				220	270	26
150	6	1.6	394	150	211	240	285	24	201	8-22 8-26
		2.5/4.0				250	300	28
200	8	1.6	457	200	266	295	340	24	252	12-22 12-26 12-30
		2.5			274	310	360	30
		4.0			284	320	375	24
250	10	1.6	533	250	319	355	405	26	310	12-26 12-30 12-33