Accumulator type quick closing butterfly valve

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KD7X42/3P type accumulator type quick closing butterfly valve
Product number:KD7X42/3P
product description:

  In coal gas waste heat power generation systems and extraction steam heating steam turbine systems, Benxi valves have been increasingly used as a guarantee for system safety.Its excellent performance such as rapid closing, low circulation resistance, and sealing ability make it can replace the electric shut-off valve and check valve in the original system design.

Product Usage:


  This valve is mainly used in parallel units of thermal power plants and gas waste heat generating units as an emergency shut-off valve for the safety of the protection system.

Features:


1. The fast closing time can reach 0.5 seconds, and the emergency shutdown is safe and reliable.
2. Three-eccentric metal seal, the sealing structure is light and flexible to open and close, and the seal is zero leakage.
3. Double eccentric soft sealing structure can be used for normal temperature medium, which has low cost and reliable sealing.
4. Buffer at the end of closing valve, effectively avoiding valve inertia impact.
5. You can use a spring to achieve quick closing, and the liquid can use an accumulator to achieve quick closing. The two forms are similar in purpose, and are equally safe and reliable.


The main technical parameters

Nominal passage (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 medium
Water, steam, gas
Applicable temperature (℃)
Soft seal: ≤80℃; Hard seal: ≤425℃

Material of main parts

Part Name
Ingredients
Valve body, butterfly plate
Gray cast iron, ductile iron, carbon steel
Valve shaft
stainless steel
Sealing ring
Stainless steel, NBR
filler
NBR

Executive standard

Design reference
GB/T 12238, JB/T 5299, JB/T 8527
Flange standard
GB/T 17241, GB/T 9113
Structure length standard
GB/T 12221
Pressure test
GB/T 13927

KD7X42/3P spring type quick-closing (emergency shut-off) butterfly valve outline, main outline and connection dimensions                       Unit: mm

DN
PN
L
L1
L2
L3

L4

Flange connection size
400
0.6
216
556
1449
320
440

GB/T 17241

GB/T 9113

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

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Address: Desheng Road, Yongjia County, Zhejiang Province