Electric wafer midline butterfly valve

Product overview

Product model: D971X

Nominal diameter: DN50-1200mm

Grade: PN0.6, 1.0, 1.6, 2.5MPa

Material: WCB, nodular cast iron

Material: 304,316,316l, 1.4529,2507, aluminum bronze

Seal: NBR, EPDM, VITON, PTFE

Connection mode: wafer type


Product Detail

Product overview

The Electric wafer midline butterfly valve adopts an integrated structure, which can be controlled by connecting to 220V AC power supply, or it can be added to a control module and input control signals (4-20mDC or 1-5V DC) for adjustment and control. The valve has the advantages of strong function, small volume, reliable performance, simple matching and large circulation capacity. Especially suitable for occasions where the medium is viscous, contains particles and fibers. The valve plate and soft seal (rubber ring and tetrafluoroethylene ring) can be used to reduce leakage (up to 0.01%), and triple eccentric hard seal valve body can be used under high temperature and high pressure conditions. It is widely used in the industrial process automatic control system of food, environmental protection, light industry, petroleum, chemical industry, teaching equipment, paper making, electric power and other industries.


Product features

1. Electric opening and closing, with functions of arbitrary adjustment, check and cut-off, convenient operation, safety and reliability.

2. The flow resistance is small, and the flow resistance coefficient is less than 0.3 when the valve is fully open.

3. When an accident or power failure occurs, the butterfly valve can be controlled by manual operation.

4. Slow opening, fast opening, fast closing and slow closing can be realized continuously, and the backflow of pump outlet medium and water hammer can be effectively prevented.

5. Energy-saving driving the same driving motor as ordinary butterfly valves can realize the functions of high-speed small torque in fast closing section and high torque in slow closing low section.


Main technical parameters

    Nominal diameter

DN(mm)

50~1200
Nominal pressure PN0.6、1.0、1.6、2.5MPa
Type of attachment Double clip type
Valve plate form Vertical plate type
Discharge characteristic Approximate quick-opening type
Range of action 0~90°
Leakage quantity According to GB/T4213-92, it is 10-4 of the Kv value, soft seal: zero leakage
Intrinsic error ±2.5%
Return difference ±2.5%
Dead space 1% (Adjustable)
Adjustable extent 50:1
Configure the actuator It can be equipped with PSQ, HQ, UNIC, 361RS, HR and other series of angular stroke electric actuators.
Control mode Switch-in-place lamp (switch two-position control), intelligent adjustment (4 ~ 20mA analog signal control)


Main parts materials

Part nameMaterial
Body Nodular cast steel, cast steel, alloy steel, stainless steel
Butterfly plate Gray cast iron, nodular cast steel, cast steel, stainless steel and special materials.
O-ring All kinds of rubber, PTFE
Valve rod 2Cr13、Stainless steel
Filling O-ring, flexible graphite


Main performance specifications

Nominal diameter DN(mm) DN50~1200
nominal pressure PN(MPa) 0.6 1.0 1.6 2.5
Testing pressure Strength test 0.9 1.5 2.4 3.75
Pressure test 0.66 1.1 1.76 2.75
Low pressure airtight test 0.5~0.7
Applicable medium Air, water, sewage, steam, gas, oil, etc.


Application specification
Design standards GB/T2238-1989
Flange connection size GB/T9113.1-2000;GB/T9115.1-2000;JB78
Structure length GB/T12221-1989
Pressure testing GB/T13927-2000;JB/T9092-1999


电动对夹式中线蝶阀(图1)


Main dimensions and weight(PN1.0/1.6MPa)

DN(mm)ABLD1n-ΦKE4-Φ1Φ2GWT(kg)
5014080431254-197757.154-6.712.61003.34
6515289461454-197757.154-6.712.61203.94
801599545.211608-197757.154-6.712.61274.05
10017811452.071808-199269.854-10.315.771565.48
12519012755.52108-199269.854-10.318.921907.66
15020313955.752408-239269.854-10.318.922128.5
20023817560.582958-2311588.94-14.322.126825
2502682036835012-2311588.94-14.328.4532531.4
30030624276.940012-23140107.954-14.331.640345.9
35036826776.1746016-23140107.954-14.331.643654

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