Electric wafer butterfly valve

Product overview

Product model: D971X

Nominal diameter: DN50-1200mm

Pressure rating: PN0.6, 1.0, 1.6, 2.5MPa

Body material: WCB, ductile iron

Valve plate material: 304, 316, 316L, 1.4529, 2507, aluminum bronze

Seat seal: NBR, EPDM, VITON, PTFE

Connection method: wafer type


Product Detail

Product description

The electric wafer type centerline butterfly valve adopts an integrated structure. It can be controlled by connecting to 220V AC power supply. It can also be added to a control module to input a control signal (4-20mA DC or 1-5V DC) for adjustment and control. The valve has the advantages of strong function, small size, reliable performance, etc., simple matching and large flow capacity. It is especially suitable for the occasions where the medium is viscous, contains particles and fibers. The valve plate and soft seal (rubber ring, PTFE ring) can be selected to reduce leakage (up to 0.01%), and the three-eccentric hard-seal valve body can be selected for high-temperature and high-pressure working conditions. It is widely used in the industrial process automatic control system of food, environmental protection, light industry, petroleum, chemical industry, teaching equipment, papermaking, electric power and other industries.


Features

1. Electric opening and closing, with arbitrary adjustment, non-return and cut-off functions, easy to operate, safe and reliable.

2. The flow resistance is small, and the flow resistance coefficient does not exceed 0.3 when the valve is fully opened.

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

4. It can continuously realize slow opening, fast opening or fast closing and slow closing actions, and effectively prevent the backflow of the pump outlet medium and the generation of water hammer.

5. Energy-saving drive The same drive motor as the ordinary butterfly valve can achieve the functions of high-speed and small torque in the fast closing section and large torque in the slow-closing low section.


Main technical parameters

Nominal diameter

DN(mm)

50~1200
Nominal pressure PN0.6、1.0、1.6、2.5MPa
Connection Type Clip-on
Valve plate form Vertical plate
Flow characteristics Approximate quick opening
Range of motion 0~90°
Leakage According to GB/T4213-92, it is 10-4 of Kv value, soft seal: zero leakage
Basic error ±2.5%
Back difference ±2.5%
Dead zone 1% (adjustable)
Adjustable range 50:1
Configure the actuator Can be equipped with PSQ, HQ, UNIC, 361RS, HR and other series of angular stroke electric actuators
Control method Switch in place light (switch two-position control), intelligent adjustment (4~20mA analog signal control)


Material of main parts

Part Name Material
Body Nodular cast steel, cast steel, alloy steel, stainless steel
Butterfly board Gray cast iron, ductile cast steel, cast steel, stainless steel and special materials
Sealing ring Various rubber, PTFE
Stem 2Cr13, stainless steel
Packing O-ring, flexible graphite


Main performance specifications

Nominal diameterDN(mm) DN50~1200
Nominal pressure PN(MPa) 0.6 1.0 1.6 2.5
Test pressure Strength test 0.9 1.5 2.4 3.75
Sealing test 0.66 1.1 1.76 2.75
Low pressure air tightness 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 test  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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