MEIONILAN electric flange butterfly valve is usually composed of an angular stroke electric actuator (0-90 ° partial rotation) and the butterfly valve as a whole, which are mechanically connected and installed and debugged together. The electric flange butterfly valve has a simple structure, small size, and light weight, and is composed of only a few parts. When the electric flange butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance for the medium to flow through the valve body. Therefore, the pressure drop generated through this valve is very small, and it has good flow control characteristics. Electric flange butterfly valves mainly have two structural forms: triple eccentric and single eccentric. The sealing forms include metal sealing, PTFE sealing, and rubber sealing. The metal sealing structure is mainly suitable for working conditions above 300 degrees Celsius; The PTFE sealing structure is suitable for working conditions within ≥ 180 degrees; The PTFE sealing structure is suitable for working conditions up to 120 degrees Celsius; The angular stroke electric actuator used with the electric flange butterfly valve can directly receive 4-20mADC or 1-5VDC control signals output by computers or industrial instruments. Based on the deviation between the valve position feedback signal and the set value, the intelligent step adjustment (PID adjustment) of the actuator drive motor is carried out to achieve precise positioning of the valve or other device opening matched with the actuator, while outputting 4-20mADC position feedback signals. At present, electric flange butterfly valves are widely used in various fields such as petroleum, chemical, metallurgical, light industry, papermaking, power plants, refrigeration, etc.
Characteristics of MEIONILAN Soft Sealing Structure
① Small size, light weight, easy operation, convenient installation and maintenance.
② Excellent and reliable sealing performance, zero leakage, and long service life.
③ The flow characteristics tend towards a straight line, and the regulation performance is optimal.
④ Simple structure, quick switch, 90 ° rotation for opening and closing.
⑤ Can replace various valves such as gate valves, globe valves, plug valves, hose valves, and diaphragm valves.
⑥ Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.
⑦ Replacing the lining material of the parts can be applied to various media.
Characteristics of MEIONILAN hard seal structure
1. The butterfly valve has a simple, compact structure, light weight, easy installation and disassembly, and convenient maintenance;
2. This butterfly valve adopts a stainless steel "U" - shaped sealing ring, which has a certain degree of elasticity and excellent sealing performance with the butterfly plate under high and low temperature conditions;
3. The three-dimensional eccentricity of this butterfly valve has been rigorously calculated, and the "U" - shaped sealing ring has almost no friction with the butterfly plate, with a long service life and the function of tightening as it is closed;
4. The sealing surface of the butterfly plate is made of welded cobalt based hard alloy, which is wear-resistant and has a long service life;
5. This butterfly valve has a unique structure, and the "switch" can be completed by simply rotating the valve stem 90 °. Flexible, convenient, effortless operation, not affected by the high or low pressure of the medium, and reliable sealing performance;
6. High temperature resistance, low temperature resistance, and corrosion resistance.
MEIONILAN electric flange butterfly valve actuator
1. Powerful functions: intelligent, adjustable, switch type.
2. Compact size: The volume is only about 35% of similar products.
3. Easy to use: using single-phase power supply, simple wiring; Adopting a unique spherical protruding structure for easier observation; No refueling, no inspection, waterproof and rust proof, and can be installed at any angle.
4. The protective device has dual limit, overheat protection, and overload protection. The full travel time is 15 seconds, 30 seconds, 45 seconds, and 60 seconds. And with manual function.
5. Intelligent CNC: The built-in module adopts 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 valve opening.
3810 series or NA series electronic angular displacement actuators can also be selected PSQ series or DYR series can also be selected. Valves with a diameter of ≥ DN200 generally use 380VAC electric actuators.
| Nominal diameter | DN(mm) 50 - 1200 |
| Nominal pressure | PN1.0, 1.6, 2.5MPa |
| Flange standard | JB/T79, GB/T9113, HG20594 - 97 |
| Connection type | Flange type |
| Valve plate form | Vertical plate type |
| Flow characteristics | Approximately quick - opening type |
| Action range | 0 - 90° |
| Leakage | According to GB/T4213 - 92, it is 10⁻⁴ of the Kv value |
| Basic error | ±2.5% |
| Hysteresis | ±2.5% |
| Dead zone | 1% (adjustable) |
| Adjustable range | 50:1 |
| Configured actuator | Can be equipped with angular stroke electric actuators of PSQ, HQ, UNIC, 361RS, JO and other series |
| Control mode | Switch in - place lamp (on - off two - position control), intelligent adjustment (4 - 20mA analog signal control) |
(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℃.
(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.
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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;
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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.
