Explosion proof Soft sealed Butterfly Valve2

Explosion proof Soft sealed Butterfly Valve3

Explosion proof Soft sealed Butterfly Valve1

Explosion-proof Soft-sealed Butterfly Valve

The Explosion-proof Electric Butterfly Valve is an automated control valve specifically designed for flammable and explosive environments. It combines the compact structure of a wafer butterfly valve with an explosion-proof electric actuator, making it widely used in high-risk industrial sectors such as petroleum, natural gas, and chemical processing.

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Product Introduction

Explosion-proof electric soft-seal butterfly valve is the most commonly used type in the general category of electric butterfly valves, suitable for liquid media such as water and oil products.

The electric butterfly disc adopts a frame structure, featuring high strength, large flow area, and low flow resistance. The overall paint-baking process effectively prevents corrosion; moreover, the valve can be adapted to different media simply by replacing the sealing seat material.

It is equipped with a bidirectional sealing function. Installation is not restricted by the flow direction of the medium or spatial position, allowing installation in any orientation.

特点

It adopts a pinless structure, which effectively prevents pin detachment during long-term operation.
This valve features bidirectional sealing, and its installation is not restricted by the flow direction of the medium or spatial position. It can be installed in any orientation.
The sealing pair is made of stainless steel and nitrile oil-resistant rubber, which effectively extends the service life.
It features remarkable cost-effectiveness, especially for large-diameter butterfly valves (the preferred choice for medium and low-pressure applications).
Due to its superior economic performance, butterfly valves are widely used in industrial automatic control systems in industries such as food, environmental protection, light industry, petroleum, papermaking, chemical engineering, shipbuilding, urban water supply and drainage, electric power, and others.

Basic Parameters

Nominal Bore (DN): DN40～800

Operating Power: AC110V / AC220V / AC380V / DC24V

Medium Temperature: -20℃～+120℃

Ambient Temperature: -30℃～+60℃

Nominal Pressure: 0.1～2.5MPa

Actuation Time: 15S / 30S / 60S

Control Method: Modulating or On/Off Control

Connection & Sealing

Connection Types:

- Wafer Type - Flange Type

Seal Types: Soft Seal

Test Pressure - Shell: 1.76MPa

Test Pressure - Seal: 2.4MPa

Material Specifications

Body & Internal Components

Body Material: WCB, QT450-10, HT200, HT250, SUS304, SUS316

Disc Material: WCB, QT450-10, HT200, HT250, SUS304, SUS316

Shaft Material: 2Cr13

Sealing Components

Sealing Ring: Nitrile Oil-Resistant Rubber, EPDM, PTFE, PPL, etc.

Stem Seal: NBR, HNBR

Packing: Flexible Graphite

Suitable Media

Water
Oil
Gas
Corrosive Medium
Other Media

Explosion Protection

Ex db ⅡC T6 Gb

Flameproof enclosure with increased safety

Explosion Protection

Flameproof (d) + Increased Safety (b)

Gas Group

ⅡC (Hydrogen, Acetylene)

Temperature Class

T6 (≤85°C)

Equipment Protection Level

Gb (Zone 1 & 2)

Standards Compliance

Design: GB/T 12238-2008

Flange:

- GB/T 9124.1-2019 - GB/T 9124.2-2019 - GB/T 17241.6-2008

Face-to-Face: GB/T 12221-2005

Testing: GB/T 13927-2008

Main Parameters

Nominal Diameter	DN40～DN800
Power Supply	AC110V, AC220V, AC380V, DC24V
Medium Temperature	-20~120℃
Ambient Temperature	-30℃～60℃
Nominal Pressure	0.1～2.5MPa
Actuating Time	15S / 30S / 60S
Applicable Medium	Water, oil, gas, corrosive medium, etc.
Control Mode	On-off or modulating control
Pneumatic Actuation	Single acting (with spring return) or double acting
Connection Type	Wafer type / Flange type
Sealing Type	Soft seal
Test Pressure	Shell test: 1.76MPa
Test Pressure	Seal test: 2.4MPa
Body Material	WCB, QT450-10, HT200, HT250, SUS304, SUS316
Disc Material	WCB, QT450-10, HT200, HT250, SUS304, SUS316
Shaft Material	2Cr13
Seal Ring Material	NBR (oil-resistant), EPDM, PTFE, PPL, etc.
Stem Seal	NBR, HNBR
Packing Material	Flexible graphite
Protection Grade	IP67
Design Standard	GB/T 12238-2008
Flange Standard	GB/T 9124.1-2019, GB/T 9124.2-2019, GB/T 17241.6-2008
Face-to-Face Standard	GB/T 12221-2005
Inspection Standard	GB/T 13927-2022

Dimension Drawing

1.Installation Dimension Chart of Wafer Type Explosion-proof Electric Butterfly Valve

Nominal Diameter DN(mm)	L	D	N-φD	H2	H1	W2	W1
40	33	125	4-Φ18	48	276	217	150
50	42.6	125	4-Φ18	70	398	217	150
65	45.6	145	4-φ18	76	375	217	150
80	45.6	160	8-φ18	89	381	217	150
100	51.6	180	4-φ22	104	414	217	150
125	55.6	210	4-φ22	120	429	217	150
150	55.6	240	4-φ23	139	465	217	150
200	59.6	295	4-φ23	175	536	268	180
250	67.6	355	4-φ28	203	562	268	180
300	77.6	410	4-φ28	242	561	268	180
350	77	470	4-φ28	277.5	562	268	180
400	86.5	525	4-φ30	309	613	354	273
450	105.6	585	4-φ30	337	633	354	273
500	131.8	650	4-φ33	361	693	354	273

Wafer Type Compatible Flange

Nominal Diameter (mm)	D	D1	D2	D3	D4	n-Φ	H	f	D5	b
50	165	125	59	52	52	4-Φ 18	20	3	62	8
65	185	145	122	75	67	4-Φ 18	20	3	78	8
80	200	160	133	91	82	8-Φ 18	20	3	91	8
100	220	180	158	110	102	8-Φ 18	22	3	116	8
125	250	210	184	135	127	8-Φ 18	22	3	142	8
150	285	240	212	161	152	8-Φ 22	24	3	170	10
200	340	295	268	221	208	12-Φ 22	26	3	221	10
250	405	355	320	275	255	12-Φ 26	29	3	275	10
300	460	410	370	327	308	12-Φ 26	32	4	326	14
350	520	470	430	379	355	16-Φ 26	34	4	358	14
400	580	525	482	429	405	16-Φ 30	36	4	409	14
450	640	585	532	481	455	20-Φ 30	38	4	460	16
500	715	650	585	532	505	20-Φ 33	42	4	511	16
600	840	770	685	633	605	20-Φ 36	44	5	613	18

2.Installation Dimension Chart of Flanged Explosion-proof Electric Butterfly Valve

Nominal Diameter DN(mm)	D1	D2	n-Φd	L	H2	H1	W1	W2
50	125	165	4-Φ18	108	70	315.5	217	150
65	145	185	4-Φ18	112	76	329.5	217	150
80	160	200	4-Φ18	114	89	341.5	217	150
100	180	220	8-Φ18	127	104	356.5	217	150
125	210	250	8-Φ18	140	120	408.5	268	180
150	240	285	8-Φ23	140	132	429.5	268	180
200	295	340	8-Φ23	152	167	459	268	180
250	350	395	12-Φ23	165	202	498	268	180
300	400	445	12-Φ23	178	239	526	268	180
350	460	505	16-Φ23	190	265	561	268	180
400	515	565	16-Φ28	216	308	640	354	273
450	565	615	20-Φ28	222	341	662	354	273
500	620	670	20-Φ28	229	381	700	354	273
600	725	780	20-Φ31	267	476	803	354	273
700	840	895	24-Φ34	292	520	866	354	273
800	950	1015	24-Φ37	318	591	949	354	273

Circuit Diagram

S

Switching Action Mode：Switching operations (open/close) are achieved via AC switching signals, and a set of active position signals indicating fully open/fully closed status are output.

MS

Switching Action Mode: Outputs passive contact signals. Structure：Equipped with two intermediate position switches.

PIU

Switching Action Mode: Outputs 0~1000Ω feedback signal. Structure: Equipped with 500Ω or 1kΩ potentiometer.

CPT

Switching Action Mode:
Outputs 4~20mA valve position feedback signal. Structure: Equipped with 1kΩ potentiometer and R/I converter.

PCU

Regulating Action Mode:Accepts 4~20mA control signal input and outputs 4~20mA valve position feedback signal. Structure: Integrated with 1kΩ potentiometer and control module (servo amplifier).

G

DC switching signals are output from the circuit via an external DC power supply to control the opening/closing program, and a set of passive contact signals corresponding to fully open/fully closed positions are provided.

SP

Switching Action Mode:
Controls valve opening angle via switching circuit, corresponding to potentiometer resistance value, while enabling intermediate position control function. Structure: Integrated with potentiometer and intermediate position switch.

H

Three-phase AC switching signals are output through an external three-phase power phase-reversing circuit to control opening/closing operations, accompanied by a set of passive contact signals for fully open/fully closed position indication.

Circuit Diagram

S

Switching Action Mode：Switching operations (open/close) are achieved via AC switching signals, and a set of active position signals indicating fully open/fully closed status are output.

MS

Switching Action Mode: Outputs passive contact signals. Structure：Equipped with two intermediate position switches.

PIU

Switching Action Mode: Outputs 0~1000Ω feedback signal. Structure: Equipped with 500Ω or 1kΩ potentiometer.

CPT

Switching Action Mode:
Outputs 4~20mA valve position feedback signal. Structure: Equipped with 1kΩ potentiometer and R/I converter.

PCU

Regulating Action Mode:Accepts 4~20mA control signal input and outputs 4~20mA valve position feedback signal. Structure: Integrated with 1kΩ potentiometer and control module (servo amplifier).

G

SP

Explosion-proof Soft-sealed Butterfly Valve

Tags

Product Introduction

特点

Basic Parameters

Connection & Sealing

Material Specifications

Body & Internal Components

Sealing Components

Suitable Media

Explosion Protection

Standards Compliance

Main Parameters

Dimension Drawing

Circuit Diagram

S

MS

PIU

CPT

PCU

G

SP

H

Circuit Diagram

S

MS

PIU

CPT

PCU

G

SP

H

Documents & Drawings:

GRAT-Soft-sealed Btterfly Valve Selection Catalog

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