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Location:Home > Product Center > Air Valve > KD7X423PAccumulator type quick closing (emergency cut off) butterfly valve
KD7X42P,KD7X423PIn the gas waste heat power generation system and extraction steam heating steam turbine system, this series of valves as a system security guarantee, has been increasingly widely used.
KD7X42P,KD7X423PIn the gas waste heat power generation system and extraction steam heating steam turbine system, this series of valves as a system security guarantee, has been increasingly widely used. Its excellent performance such as quick closing, low flow resistance and sealing can be used to replace the electric stop valve and check valve in the original system design. The accumulator type quick closing butterfly valve is mainly used in the parallel unit of thermal power plant and the gas waste heat generator set to protect the safety of the system.
Nominal diameter(mm) |
400~1600 |
||||
Nominal pressure(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 |
working pressure(Mpa) |
0.6 |
1.0 |
1.6 |
|
|
Applicable media | Water, steam, gas | ||||
Applicable temperature(℃) |
Soft seal: ≤ 80 ℃; hard seal: ≤ 425 ℃ |
1. The fast closing time can reach 0.5 seconds, and the emergency cut-off is safe and reliable.
2. Three eccentric metal seal, seal structure, light and flexible opening and closing, sealing zero leakage.
3. Double eccentric soft sealing structure can be selected for normal temperature medium, with low cost and reliable sealing.
4. Close the valve end buffer, effectively avoid the valve inertia impact.
5. Spring can be used to realize quick closing, and accumulator can be used to realize quick closing of liquid. The two forms are the same, and they are also safe and reliable.
Part name | Material Science |
Valve body and butterfly plate | Gray cast iron, ductile iron, carbon steel |
stainless steel | |
seal ring |
stainless steel、NBR |
filler |
NBR |
Design reference |
GB/T 12238、JB/T 5299、JB/T 8527 |
Flange standard |
GB/T 17241、GB/T 9113 |
Structural length standard |
GB/T 12221 |
Pressure test |
GB/T 13927 |
DN |
PN |
L |
L1 |
L2 |
L3 |
L4 |
Flange connection size |
400 |
0.6 |
216 |
556 |
1449 |
320 |
440 |
GB/T 17241 |
1.0 |
216 |
556 |
1449 |
330 |
440 |
||
1.6 |
216 |
556 |
1449 |
345 |
440 |
||
450 |
0.6 |
222 |
556 |
1449 |
370 |
440 |
|
1.0 |
222 |
556 |
1449 |
380 |
440 |
||
1.6 |
22 |
580 |
1449 |
395 |
490 |
||
500 |
0.6 |
229 |
580 |
1449 |
400 |
440 |
|
1.0 |
229 |
580 |
1449 |
410 |
490 |
||
1.6 |
229 |
580 |
1449 |
425 |
490 |
||
600 |
0.6 |
267 |
580 |
1449 |
440 |
490 |
|
1.0 |
267 |
625 |
1449 |
460 |
490 |
||
1.6 |
267 |
625 |
1820 |
470 |
490 |
||
700 |
0.6 |
292 |
625 |
1449 |
436 |
490 |
|
1.0 |
292 |
625 |
1820 |
550 |
490 |
||
1.6 |
292 |
625 |
1820 |
570 |
545 |
||
800 |
0.6 |
318 |
625 |
1820 |
625 |
545 |
|
1.0 |
318 |
625 |
1820 |
640 |
490 |
||
1.6 |
318 |
625 |
1820 |
660 |
545 |
||
900 |
0.6 |
330 |
625 |
1820 |
700 |
545 |
|
1.0 |
330 |
625 |
1820 |
710 |
545 |
||
1.6 |
330 |
675 |
1820 |
725 |
545 |
||
1000 |
0.6 |
410 |
675 |
1820 |
760 |
545 |
|
1.0 |
410 |
675 |
2180 |
770 |
610 |
||
1.6 |
410 |
675 |
1820 |
790 |
610 |
||
1200 |
0.6 |
470 |
675 |
2180 |
875 |
610 |
|
1.0 |
470 |
675 |
2180 |
890 |
610 |
||
1.6 |
470 |
729 |
2180 |
915 |
610 |
||
1400 |
0.6 |
530 |
729 |
2180 |
1000 |
610 |
|
1.0 |
530 |
729 |
2180 |
1045 |
720 |
||
1.6 |
530 |
781 |
2180 |
1020 |
720 |
||
1600 |
0.6 |
600 |
781 |
2180 |
1120 |
960 |
|
1.0 |
600 |
781 |
2180 |
1140 |
720 |
||
1.6 |
600 |
781 |
2520 |
1170 |
960 |
1. Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. Please refer to the manual for electric drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.
11. If the valve is found to be open and closed abnormally, the cause shall be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force.
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