Electric Flanged Butterfly Valve (Explosion-Proof Type)_Meisonilan Valves (Suzhou) Co., Ltd.

(1) The use of adhesive free lining ensures complete isolation between the medium and metal, improving the reliability of the product.
(2) The sealing surface has good wear resistance (rubber has seven times the wear resistance of copper).
(3) Can be installed in any position, easy to maintain.
(4) The seals can be replaced, and the sealing performance is reliable, achieving bi-directional sealing with zero leakage.
(5) Rubber materials are non-toxic and resistant to bacteria and mold.

Application Standards for Electric Flanged Butterfly Valves (Soft Seal)

Design Standard	GB/T2238-1989
Flange Connection Dimensions	GB/T9113.1-2000; GB/T9115.1-2000; JB78
Structural Length	GB/T12221-1989
Pressure Test	GB/T13927-2000; JB/T9092-1999

Technical Parameters of Actuators for Electric Flanged Butterfly Valves (Soft Seal)

Actuator Category	EI-TORK Series Actuator Parameters	EXI-TORK Series Actuator Parameters
Power Supply Voltage	Standard: 220V Single-phase Optional: 110V AC Single-phase, 380/440V Three-phase, 24V/110V/220V DC
Output Torque	50N·M～2000N·M	50N·M～4000N·M
Action Range	0～90° 0～360°	0～90°, 0°～270° Optional
Control Mode	Switch in-place lamp (On-off two-position control), Passive contact signal, 1/5K potentiometer, Intelligent adjustment (4～20mA analog signal control)
Action Time	15 seconds/30 seconds/60 seconds	18S～112S
Protection Device	Overheat protection	Built-in overheat protection, Overload protection
Ambient Temperature	-30°～60°	-20℃～+70℃
Manual Operation	Operate with the attached handle	Mechanical clutch mechanism, equipped with handwheel for operation
Mechanical Limit	Electrical and mechanical double limits	Electrical and mechanical double limits
Protection Level	IP65	IP65, IP67, Customizable IP68
Explosion-proof Level	Non-explosion-proof	ExdⅡ BT6, ExdⅡ CT5
Position Measurement	Optional switch or potentiometer	Potentiometer, Proportional control unit
Drive Motor	8W/E	Squirrel-cage asynchronous motor
Inlet Interface	2 G1/2〞M18*1.5	2 PF 3/4”
Shell Material	Aluminum alloy	Aluminum alloy
Outer Coating	Dry powder, Epoxy polyester, with super anti-corrosion function

1) Powerful functions: Intelligent type, Regulating type, On-off type.
2) Compact size: Only about 35% of the volume of similar products.
3) Easy to use: Single-phase power supply, simple wiring; No need for refueling or spot checks, waterproof and rustproof, can be installed at any angle.
4) Protection devices include double limits, overheat protection, and overload protection. The full-stroke time is 15 seconds, 30 seconds, 45 seconds, 60 seconds. And it has a manual function.
5) Intelligent numerical control: The built-in module uses an advanced computer single-chip and intelligent control software to directly receive standard signals (4-20mA DC /1-5VDC) output from computers or industrial instruments to achieve intelligent control and precise positioning of the valve opening.

Part Materials of Electric Flanged Butterfly Valves (Soft Seal)

Part Name	Material
Valve Body	Ductile cast steel + NBR, Cast steel + NBR, Stainless steel + NBR
Butterfly Plate	Gray cast iron, Ductile cast steel, Cast steel, Stainless steel and special materials
Valve Stem	2Cr13, Stainless steel
Packing	O-ring, Flexible graphite

Performance Specifications of Electric Flanged Butterfly Valves (Soft Seal)

Nominal Diameter DN (mm)		DN50～1200
Nominal Pressure	PN (MPa)	0.6	1.0	1.6
Test Pressure	Strength Test	0.9	1.5	2.4
	Sealing Test	0.66	1.1	1.76
	Low-pressure Gas-tight Test	0.5～0.7
Applicable Medium	Air, Water, Sewage, Steam, Gas, Oil, etc.

Technical Parameters of Electric Flanged Butterfly Valves (Soft Seal)

Nominal Diameter	DN50~450mm
Connection Method	Flange
Actuator Selection	ODL Compact Type, OHQ Explosion-proof Type
Control Mode	On-off type (Electric open, Electric close), Regulating type, Intelligent integrated model
Nominal Pressure	PN1.0, 1.6, 2.5Mpa (Please indicate if higher pressure is required)
Power Supply Voltage	AC220V, AC380V, DC24V (Please indicate if special voltage is required)
Medium Temperature	Carbon steel: -29℃~+425℃
Medium Temperature	Stainless steel: -40℃~+600℃
Ambient Temperature	Standard type: -20℃~+80℃
Protection Level	IP65, IP67, IP68
Valve Body Material	Carbon steel, Stainless steel
Sealing Material	Polytetrafluoroethylene (F), All-metal seal (H)
Sealing Material	Cemented carbide (Y)
Operating Conditions	Water, Steam, Oil, Nitric acid, Acetic acid

Main Connection Dimensions of Electric Flanged Butterfly Valves (Soft Seal)

Nominal Diameter Overall Dimensions (Reference Values) Connection Dimensions (Reference Values) Actuator Selection

PN1.0MPa PN1.6Mpa

mm Inch L H1 H D2 D1 Z-d D2 D1 Z-d

50 2 161 215 85 82 125 4-18 82 125 4-18 MN-08 MHQ-08

65 21/2 188 280 90 95 145 4-18 95 145 4-18 MNL-10 MHQ-10

80 3 188 258 100 108 160 4-18 108 160 4-18 MNL-15 MHQ-15

100 4 268 310 120 125 180 4-18 125 180 4-18 MNL-20 MHQ-20

125 5 268 310 130 138 210 4-18 138 210 4-18 MNL-30 MHQ-30

150 6 268 315 160 198 240 4-22 198 240 4-22 MNL-40 MHQ-40

22 8 268 380 210 236 295 4-22 236 295 4-22 MNL-60 MHQ-60

250 10 268 460 250 276 355 4-22 276 355 4-26 MNL-80 MHQ-80

300 12 268 475 250 300 410 4-22 308 410 4-26 MNL-100 MHQ-100

350 14 268 510 320 332 470 4-22 340 470 4-26 MNL-200 MHQ-200

400 16 268 550 350 366 525 4-36 374 525 4-30 MNL-300 MHQ-300

450 18 268 590 380 366 585 4-36 384 585 4-30 MNL-400 MHQ-400

Nominal Diameter	Overall Dimensions (Reference Values)	Connection Dimensions (Reference Values)	Actuator Selection
PN1.0MPa	PN1.6Mpa
mm	Inch	L	H1	H	D2	D1	Z-d	D2	D1	Z-d
50	2	161	215	85	82	125	4-18	82	125	4-18	MN-08	MHQ-08
65	21/2	188	280	90	95	145	4-18	95	145	4-18	MNL-10	MHQ-10
80	3	188	258	100	108	160	4-18	108	160	4-18	MNL-15	MHQ-15
100	4	268	310	120	125	180	4-18	125	180	4-18	MNL-20	MHQ-20
125	5	268	310	130	138	210	4-18	138	210	4-18	MNL-30	MHQ-30
150	6	268	315	160	198	240	4-22	198	240	4-22	MNL-40	MHQ-40
22	8	268	380	210	236	295	4-22	236	295	4-22	MNL-60	MHQ-60
250	10	268	460	250	276	355	4-22	276	355	4-26	MNL-80	MHQ-80
300	12	268	475	250	300	410	4-22	308	410	4-26	MNL-100	MHQ-100
350	14	268	510	320	332	470	4-22	340	470	4-26	MNL-200	MHQ-200
400	16	268	550	350	366	525	4-36	374	525	4-30	MNL-300	MHQ-300
450	18	268	590	380	366	585	4-36	384	585	4-30	MNL-400	MHQ-400

Note: The above selection parameters are for reference only. Please refer to the actual situation.

Valve Installation:
(1) Before installation, check that the product model, tag number, and specifications match the requirements. Inspect the entire valve for missing or loose parts.
(2) Prior to installation, clean the pipeline. Ensure there is sufficient straight pipe section at the valve inlet and install a filter. When connecting the valve body to the pipeline flanges, ensure coaxiality.
(3) Thoroughly clean the pipeline before installing the valve.
(4) The installation site should ensure the safety of personnel and equipment, facilitating operation, disassembly, and maintenance.
(5) The valve should be installed vertically upright on horizontal pipelines. If necessary, it can be installed at an angle, but horizontal installation should be avoided. For occasions with heavy valve weight or vibration, use a support frame.
(6) The medium flow direction must align with the arrow on the valve body. The air supply should be dry and oil-free. The valve should be used in environments with temperatures ranging from -20℃ to 55℃.

Valve Maintenance:
(1) Cleaning the Valve: For general media, cleaning with water is sufficient. For media harmful to health, first understand their properties and then select an appropriate cleaning method.
(2) Disassembly: Remove rust from exposed rusted parts first. Before derusting, protect the machined surfaces of precision parts such as the valve seat, valve plug, valve stem, and push rod. Use special tools when disassembling the valve seat.
(3) Valve Seat: Minor rust or wear on the sealing surface can be repaired by machining. If damage is severe, replace the seat. However, both repaired and replaced hard sealing surfaces must be lapped.
(4) Valve Stem: If the surface is damaged, it must be replaced.
(5) Damage to Push Rod, Guide, and Sealing Surfaces: Reverse-acting actuators must be replaced; direct-acting actuators can be reused after proper repair.
(6) Compression Spring: If there are cracks or other defects affecting strength, replace it immediately.
(7) Wear Parts: Packing, gaskets, and O-rings must be replaced entirely during each maintenance. Check the valve plug and diaphragm for cracks, aging, or corrosion that may cause future failures. Decide whether to replace them based on inspection results, but the diaphragm service life should not exceed 2-3 years.
(8) When reassembling the valve, ensure alignment. Tighten bolts diagonally and lubricate sliding parts. After reassembly, debug the valve according to the factory test items and methods. During this period, accurately adjust the packing compression force and the valve plug closing position.

When placing an order, please fill in the Specification Sheet or specify the following information:

If the model has not been selected before ordering, please provide us with the operating parameters:
(1) Nominal diameter DN (mm);
(2) Nominal pressure (MPa or bar);
(3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
(4) Pressure before and after the valve (pressure differential);
(5) Requirements for flow characteristics;
(6) Materials of valve body and valve core;
(7) Connection type;
(8) Driving method (provide air supply pressure, driving voltage);
(9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
(10) On-site working conditions.
If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.