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Electric hard seal wafer butterfly valve


General model: D971H / W

Nominal diameter: DN50 ~ 1200mm

Pressure range: PN1.0 ~ 2.5MPa

Applicable temperature: carbon steel: - 29 ℃ ~ 400 ℃, stainless steel: - 40 ℃ ~ 600 ℃

Applicable media: air, water, sewage, steam, gas, oil, etc

Valve material: cast steel, stainless steel

Manufacturing standard: JB / t8527-1997

Flange standard: GB / t9113-2000

Length standard: GB / t12221-1989

Test standard: GB / t13927-1992



PRODUCT OVERVIEW

The electric hard seal wafer butterfly valve is mainly composed of an electric actuator and a hard seal wafer butterfly valve. The hard seal butterfly valve adopts a three eccentric multi-level metal hard seal structure, which has the performance of wear resistance and erosion resistance. It is widely used as medium in metallurgical, electric power, petrochemical, pharmaceutical and water supply and drainage industrial pipelines. By using (220V, 380V) power supply voltage as the driving power, receiving the (4 ~ 20mA) signal output by the industrial automation instrument control system, the valve stem is driven to drive the butterfly plate (0-90 °) to rotate to complete the switching and adjustment of the butterfly valve.


PRODUCT FEATURES

1. The valve adopts three eccentric sealing structure, and the wear of valve seat and butterfly plate is small. It has the dual advantages of metal hard seal and elastic seal. It has the characteristics of good sealing and corrosion resistance under the conditions of low and high temperature.

2. The sealing surface adopts surfacing cobalt based cemented carbide, which has the advantages of wear resistance, high strength, large overflow area and small flow resistance. It has two-way sealing function, which is not limited by the flow direction of medium and affected by the spatial position.


MAIN TECHNICAL PARAMETERS

Nominal diameterDN(mm)50~1200
Nominal pressurePN1.0、1.6、2.5MPa
Connection formWafer type
Sealing formThree eccentric metal hard seal
Flow characteristicsApproximate quick opening type
Action range0~90°
LeakageAccording to GB / t4213-92, it is 10-4 of Kv value
Basic error±2.5%
Return difference±2.5%
dead zone1% (adjustable)
Adjustable range50:1
Configure actuatorIt can be equipped with PSQ, HQ, UNIC, 361rs, HR and other series of angular stroke electric actuators
Control modeSwitch in place lamp (switch two position control), intelligent regulation (4 ~ 20mA analog signal control)


MATERIAL OF MAIN PARTS

Part nameMaterial Science
valve bodyCast iron, stainless steel, chromium molybdenum steel, alloy steel
DiscCast steel, alloy steel, stainless steel, chromium molybdenum steel
seal ringStainless steel and high temperature resistant asbestos board are combined into multiple layers
Valve stem2Cr13, 1Cr13 stainless steel, chromium molybdenum steel
fillerO-ring, flexible graphite


MAIN PERFORMANCE SPECIFICATIONS

Nominal diameterDN(mm)DN50~1200
Nominal pressurePN(MPa)0.61.01.62.5
Test pressurestrength test0.91.52.43.75
Sealing test0.661.11.762.75
Low pressure air tightness test0.5~0.7
Applicable mediaAir, water, sewage, steam, gas, oil, etc
Applicable temperatureCarbon steel: - 29 ℃ ~ 400 ℃, stainless steel: - 40 ℃ ~ 600 ℃


MAIN OVERALL CONNECTION DIMENSIONS

Nominal diameter(DN)Main dimensionsFlange size
LHH11.0MPa1.6MPa2.5MPa
DD1n-ФdDD1n-ФdDD1n-Фd
50431125301651254-181651254-181651254-18
65461155301851454-181851454-181851458-18
80461205652001604-182001608-182001608-18
100521386002201808-182201808-182351908-22
125561646402502108-182502108-182702208-26
150561757052852408-222852408-223002508-26
200602007753402958-2234029512-2236031012-26
2506824394539535012-2240535512-2642537012-30
30078250107044540012-2246041012-2648543016-30
35078280114050546016-2252047012-2655549016-33
400102305121056551516-2658052516-2662055016-36
450114350133561556520-2664058516-3067060020-36
500127380141567062020-2671565020-3073066020-36
600154445160578072520-3084077020-3384577020-39
700165480184489584024-3091084024-3696087524-42
8001905302040101595024-33102595024-39108599024-48
90020358022551115105028-331125105028-391185109028-48
100021665023801230116028-361255117028-421320121028-56
120025476026401455138032-391485139032-481530142032-56

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