Butterfly Valve Series

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Electric Speed Control Butterfly Valve

manufacturer: Shanghai Fengqi Industry Development Co., Ltd.
Eml: sales@fengqi.sh.cn

Tel: 86 (21) 3652 8716
Mob: (86) 138 1635 6498

product drawing

Electric speed control butterfly valves
Electric speed control butterfly valves

The introduction and features of product

As a new generation of speed control butterfly valve, the design of DV942X / H Electric Speed Control Valve has changed the traditional mode of relying on mechanical transmission to complete the disc switches speed change. According to the action features of different position of disc, it carries out a new design from the electric drive control. This series of butterfly valves change the input current frequency of electrical device, and then adjust the rotational speed and output torque, to reach the speed of controling disc switches, and to achieve the two stages shut down of disc quick off and slow off or slow open, quick open two stages. It has the same function with the hydraulic control butterfly valve. DV942X / H Electric speed control butterfly valve is used in the pump outlet position of water, seawater medium pipelines, as a cut-off valve with features of check valve. It is designed to prevent and reduce the media back in the piping system and water hammer impact, and protect the pipeline, especially for the reliable power supply situation of power plants, water plants, etc. The main features are: 1, electric hoist, with functions of an arbitrary speed, check and globe. Easy to operate, safe and reliable. 2, the valve can achieve a continuous actions of slow open, quick open or fast off, slow off, and effectively prevent the back flow of the pump outlet and water hammer. 3, energy-saving drive, which is same with the ordinary butterfly valve, can achieve quick off segment of high-speed and small torque, slow-off segment of low speed and large torque function. 4, When installed in the pump outlet, this valve has a common function of check valve and gate valve, so can one valve on behalf of two valves. And it is also saving installation space and cost of pipelines. 5, flow resistance is small. The flow resistance coefficient of full open does not exceed 0.3, so you can save energy and reduce pipeline operating costs. 6, when an accident happened or a power outage, you can manually control the valve open and close.

Dimensions & constructral diagram

Electric speed control butterfly valve constructral diagram(pic1)
Electric speed control butterfly valve constructral diagram(pic1)
Electric speed control butterfly valve constructral diagram(pic2)
Electric speed control butterfly valve constructral diagram(pic2)

The materials of main parts and standard

part name materials remarks
body,disc,gland HT200, HT250, QT450-10  
shaft,pin 2Cr13  
body sealing ring 1Cr18Ni9Ti, 2Cr13  
disc sealing ring NBR, 1Cr18Ni9Ti  
bearing SF-1, SF-2 self-lubricating
packing NBR  
design and manufacture:GB12238 flange connection dimensions:GB2555-2526-8 face to face dimensions:GB12221 pressure test:GB/T13927

Main technical parameter

nominal pressure(MPa) 0.25 0.6 1.0
nominal diameter(mm) 1000~2400 800~2400 500~1600
test pressure(MPa) intensity test 0.375 0.9 1.5
sealing test 0.275 0.66 1.1
applicable medium water,seawater
suitable temperature ≤80℃
installation Vertical, horizontal

The main external and connection dimensions

PN DN L A H1 H2 DO B1 B2 B3 B4
0.25MPa 1000 410   817 1303 400 225 709 303 770
1200 470 1200 812 1529 400 225 709 303 760
1400 530 1400 1012 1692 400 225 728 303 760
1600 600 1600 1145 1885 400 275 843 385 778
1800 670 1800 1315 1824 400 275 879 385 792
2000 760 2000 1670 2095 400 275 969 450 856
2200 840 2200 1739 2487 400 430 1103 540 995
2400 910 2400 1699 2595 400 430 1103 540 995
Note: it can produce DN250-3000(GB12221-89) long series according to customers’ requirements,from DN1200-3000 with bottom foot must be marked.

The main external and connection dimensions

PN DN L A H1 H2 DO B1 B2 B3 B4
0.6MPa 800 318   677 1190 500 175 583 230 683
900 330   745 1245 400 225 709 303 770
1000 410   817 1303 400 225 709 303 760
1200 470 1200 912 1529 400 225 728 303 760
1400 530 1400 1041 1692 400 275 843 385 778
1600 600 1600 1145 1885 400 275 879 385 792
1800 670 1800 1346 1924 400 275 969 450 856
2000 760 2000 1670 2095 400 430 1103 540 995
2200 840 2200 1739 2487 400 430 1103 540 995
2400 910 2400 1850 2595 400 430 1103 540 995
1.0 MPa 500 229   548 943 500 145 533 162 610
600 267   583 985 500 175 583 230 683
700 292   612 1075 500 175 583 230 683
800 318   677 1190 400 225 709 303 770
900 330   745 1245 400 225 709 303 760
1000 410   817 1303 400 225 728 303 760
1200 470 1200 948 1529 400 275 843 385 778
1400 530 1400 1158 1692 400 275 879 385 792
1600 600 1600 1285 1885 400 275 969 450 856
Note: it can produce DN250-3000(GB12221-89) long series according to customers’ requirements,from DN1200-3000 with bottom foot must be marked.
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