Electric Soft-sealed Butterfly Valve

Soft-Seated Electric Butterfly Valve is a valve operated by an electric actuator, equipped with a flexible sealing element to ensure tight shut-off and prevent leakage in fluid control systems.

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Product Introduction

The electric soft-seal butterfly valve features a pinless structure, which effectively prevents pin detachment during long-term operation. It also offers bi-directional sealing, allowing installation in any orientation without restrictions imposed by medium flow direction or spatial constraints.The sealing pair is composed of stainless steel and nitrile oil-resistant rubber, which greatly enhances sealing performance and effectively extends the service life of the product.

特点

Adopting a pinless structure, it effectively prevents pin detachment during long‑term operation.
This valve features bi‑directional sealing, allowing installation regardless of medium flow direction 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 service life.
It offers remarkable economic efficiency, especially for large‑bore butterfly valves.
(Butterfly valves are the preferred choice for medium and low‑pressure applications.)
Thanks to its superior cost‑effectiveness, butterfly valves are widely used in industrial automatic control systems in
food, environmental protection, light industry, petroleum, paper making, chemical industry, shipbuilding, urban water supply and drainage, electric power, and other industries.

Basic Parameters

Nominal Bore (DN): DN40～DN800

Operating Power: AC110V / AC220V / AC380V / DC24V

Medium Temperature: -20℃～120℃

Ambient Temperature: -30℃～60℃

Nominal Pressure (PN): 0.1～2.5MPa

Actuation Time: 15S / 30S / 60S

Control Method: Modulating or On/Off Control

Pneumatic Action Mode:

- Single Acting (with spring return) - Double Acting

Connection Types:

- Wafer Type - Flange Type

Sealing Type: Soft Seal

Test Pressure:

- Shell Test: 1.76MPa - Seal Test: 2.4MPa

Protection Grade: IP67

Material Specifications

Body & Internal Components

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

Valve Plate Material: WCB, QT450-10, HT200, HT250, SUS304, SUS316

Rotating Shaft Material: 2Cr13

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

Valve Stem Seal: NBR, HNBR

Packing Material: Flexible Graphite

Suitable Media

Water
Oil Products
Gas
Corrosive Media

Standards Compliance

Manufacturing: GB/T 12238-2008

Flange:

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

Structure Length: GB/T 12221-2005

Testing: GB/T 13927-2022

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 (mm)	L	D	N-ΦD	H2	H1	W1	W2
40	33	---	---	48	210	138	76
50	42.6	125	4-Φ18	70	314	160	137
65	45.6	145	4-Φ18	76	327	160	137
80	45.6	160	4-Φ18	89	333	160	137
100	51.6	180	4-Φ22	104	385	196	145
125	55.6	210	4-Φ22	120	400	196	145
150	55.6	240	4-Φ23	139	442	255	182
200	59.6	295	4-Φ23	175	480	255	182
250	67.6	355	4-Φ28	203	522	255	182
300	77.6	410	4-Φ28	242	537	255	182
350	77	470	4-Φ28	277.5	555	354	273
400	86.5	525	4-Φ30	309	590	354	273
450	105.6	585	4-Φ30	337	610	354	273
500	131.8	650	4-Φ33	361	670	354	273
600	152	770	4-Φ36	459	1110	520	470
700	163	840	4-Φ36	527	1180	520	470
800	188	950	4-Φ39	594	1220	520	470

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 (mm)	D1	D2	N-ΦD	L	H2	H1	W1	W2
50	125	165	4-Φ18	108	70	288	196	145
65	145	185	4-Φ18	112	76	301	196	145
80	160	200	4-Φ18	114	89	313	196	145
100	180	220	8-Φ18	127	104	328	196	145
125	210	250	8-Φ18	140	120	348	196	145
150	240	285	8-Φ23	140	132	368	196	145
200	295	340	8-Φ23	152	167	435	255	182
250	350	35	12-Φ23	165	202	474	255	182
300	400	445	12-Φ23	178	239	502	255	182
350	460	505	16-Φ23	190	265	537	255	182
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

Electric Soft-sealed Butterfly Valve

Tags

Product Introduction

特点

Basic Parameters

Material Specifications

Body & Internal Components

Suitable Media

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

Electric Butterfly Valve Instruction Manual

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