Home >> Products >> Butterfly valve
Flange type elastic metal hard seal butterfly valve product overview:
DT943H/643H/343H-6/10/16/25/40C.P.R.V series Flanged elastic metal hard seal butterfly valve The butterfly valve is simple in structure, compact, light in weight, easy to install and disassemble, easy to maintain. The butterfly valve adopts stainless steel "U" type sealing ring, which has a certain elasticity no matter in the case of high temperature and low temperature, it has excellent sealing with the butterfly plate. The three dimensional eccentricity of the butterfly valve, after strict calculation, the "U" type sealing ring and the butterfly plate almost no friction, long service life, and has the function of the tighter the closer. The sealing surface of the butterfly plate adopts surfacing welding cobalt-based cemented carbide, which is wear-resistant and has long service life. The butterfly valve has unique structure, and the "switch" can be completed only by turning the stem 90°. The operation is flexible, convenient, labor-saving, not affected by the medium pressure, and the sealing performance is reliable. High temperature, low temperature and corrosion resistance. The elastic hard seal butterfly valve adopts a "U" type stainless steel sealing ring, the precision elastic sealing ring and the polished butterfly plate three-dimensional eccentric contact. It solves the problem that the sealing surface of the traditional eccentric butterfly valve is still in the sliding contact friction when opening and closing 0° ~ 10°, and realizes the effect that the sealing surface of the butterfly plate is separated when opening and the contact is closed, so as to extend the service life and achieve the purpose of better sealing performance. Therefore, it is widely used in the medium temperature ≤550ºC metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage and other corrosive medium pipelines, is the best device to regulate the flow and cut off the fluid. Design standard :GB/T12238-1989
flange connection size :
GB/ T9113.1-2000; GB/T9113.2-2000
GB/T9115.1-2000; GB/T9115.2-2000
Structure length :GB/T12221-1989
Pressure test :GB/T13927-1992; JB/T9092-1999
Main technical parameters
Nominal diameter DN (mm) 50 to 1200
Nominal pressure PN (MPa) 0.6 1.0 1.6 2.5 4.0
Test pressure Strength test 0.9 1.5 2.4 3.75 6.0
Seal test 0.66 1.1 1.76 2.75 4.4
Gas seal test 0.6 0.6 0.6 0.6 0.6
Applicable medium Water, steam, oil, acid corrosion, etc.
Driving method Manual, worm gear drive, pneumatic, electric
Applicable temperature Carbon steel :-29ºC ~ 600ºC Stainless steel -40ºC ~ 600ºC
Material of main parts
Part name Materials
Body Cast iron, cast steel, stainless steel, chrome-molybdenum steel, alloy steel
Butterfly plate Cast steel, alloy steel (hard chrome plated), stainless steel, chrome molybdenum steel
Sealing ring Stainless steel, polyolactone, anti-wear material
Valve stem 2Cr13, 1Cr13 stainless steel, chromium molybdenum steel
Stuffing Flexible graphite
Three eccentric characteristics and principle
1, deviation from the center of the pipeline
2, deviation from the center of the sealing surface
3, inclined cone
when the valve is opened, the butterfly plate and the valve seat in close instant contact, the use of the butterfly plate eccentric 1, eccentric 2 quickly out of the valve seat, reduce the wear of the sealing pair, small friction torque, open flexible. Eccentric cone 3, so that when the valve is opened or closed, the butterfly plate can pass through the valve seat hole to achieve contact sealing. In addition, the rotation radius of the conical butterfly plate is greater than the rotation radius of the contact position of the sealing pair, so the butterfly plate will be more and more tightly closed when the valve is closed, which can realize self-locking and prevent the butterfly plate from overpositioning.
DT943H/643H/343H-6/10C.P.R.V series flanged elastic metal hard seal butterfly valve
Nominal diameter Standard value for
length of structure Overall dimensions (reference value) Connection dimension (standard value) Weight
(kg)
H Dt373H Dt673H Dt973H PN0.6 MPa PN1.0 MPa
millimeter inches L H1 A1 B1 H2 A2 B2 H3 A3 B3 D1 Z-d D1 Z-d
50 2 43 112 350 180 200 625 245 72 530 250 255 110 4-14 125 4 to 18 11
65 2 1/2 46 115 370 180 200 625 245 72 530 250 255 130 4-14 145 4 to 18 12
80 3 49 120 380 180 200 645 245 72 565 250 255 150 4 to 18 160 8 to 18 14
100 4 56 138 420 180 200 675 355 92 600 250 255 170 4 to 18 180 8 to 18 16
125 5 64 164 460 180 200 715 355 92 640 250 255 200 8 to 18 210 8 to 18 26
150 6 70 175 555 270 280 800 355 92 705 300 315 225 8 to 18 240 8-22 28
200 8 71 208 605 270 280 850 250 170 775 300 315 280 8 to 18 295 8-22 44
250 10 76 243 680 270 280 925 250 170 945 300 315 335 12-18 350 12 and 22 68
300 12 83 283 800 380 420 1035 450 220 1070 300 315 395 12 and 22 400 12 and 22 85
350 14 92 310 835 380 420 1070 450 220 1140 300 315 445 12 and 22 460 16-22 121
400 16 102 340 915 450 470 1190 450 220 1210 300 315 495 16-22 515 16-22 140
450 18 114 380 960 480 490 1250 650 280 1335 575 714 550 16-22 565 20 to 26 190
500 20 127 410 1020 480 490 1290 650 280 1415 575 714 600 20-22 620 20 to 26 260
600 24 154 470 1225 480 490 1455 850 380 1605 656 810 705 20 to 26 725 20-30 380
seven hundred 28 165 550 1355 640 660 1585 850 380 1844 656 810 810 24-26 840 24 to 30 450
800 32 190 640 1470 640 660 1700 1250 380 2040 656 810 920 24 to 30 950 24 to 33 650
900 36 203 710 1545 750 860 1965 1250 380 2255 785 863 1020 24 to 30 1050 28 and 33, 830
1000 40 216 770 1795 850 900 2015 1250 380 2380 785 863 1120 28 and 30 1160 28-36 1050
1200 48 254 890 1965 850 900 2250 1250 380 2640 785 863 1340 32-33 1380 32-39 1400
DT943H/643H/343H-16/25C.P.R.V series flanged elastic metal hard seal butterfly valves
Nominal diameter Standard value for
length of structure Overall dimensions (reference value) Connection dimension (standard value) Weight
(kg)
H Dt373H Dt673H Dt973H PN1.6 MPa PN2.5 MPa
millimeter inches L H1 A1 B1 H2 A2 B2 H3 A3 B3 D1 Z-d D1 Z-d
50 2 43 112 350 180 200 625 245 72 530 250 255 125 4-14 125 4 to 18 11
65 2 1/2 46 115 370 180 200 625 245 72 530 250 255 145 4-14 145 8 to 18 12
80 3 49 120 380 180 200 645 245 72 565 250 255 160 8 to 18 160 8 to 18 15
100 4 56 138 420 180 200 675 355 92 600 250 255 180 8 to 18 190 8-22 17
125 5 64 164 460 180 200 715 355 92 640 250 255 210 8 to 18 220 8-26 27
150 6 70 175 555 270 280 800 355 92 705 300 315 240 8-22 250 8-26 29
200 8 71 208 605 270 280 850 250 170 775 300 315 295 12 and 22 310 12-26 45
250 10 76 243 680 270 280 925 250 170 945 300 315 355 12-26 370 12-30 69
300 12 83 283 825 380 420 1035 450 220 1070 300 315 410 12-26 430 16 and 30 86
350 14 92 310 900 380 420 1070 450 220 1140 300 315 470 16 and 26 490 16-33 122
400 16 102 340 980 450 470 1190 450 220 1210 300 315 525 16 and 30 550 16-36 141
450 18 114 380 1030 480 490 1250 650 280 1335 575 714 585 20-30 600 20-36 191
500 20 127 410 1105 480 490 1290 650 280 1415 575 714 650 20-33 660 20-36 260
600 24 154 470 1310 480 490 1455 850 380 1605 656 810 770 20-36 770 20 to 39 380
seven hundred 28 165 550 1435 640 660 1585 850 380 1844 656 810 840 24-36 875 24-42 450
800 32 190 640 1605 640 660 1700 1250 380 2040 656 810 950 24-39 990 24-48 650
900 36 203 710 1745 750 860 1865 1250 380 2255 785 863 1050 28-39 1090 28 and 48 830
1000 40 216 770 1885 850 900 2015 1250 380 2380 785 863 1170 28-42 1210 28 and 56 1050
1200 48 254 890 2105 850 900 2250 1250 380 2640 785 863 1390 32-48 1420 32-56 1400
Note to users: H1, H2, H3 sizes in the table can be extended according to user needs (long rod butterfly valve), if special materials are required when ordering. Note: Dt- stands for elastic seal structure.
DT943H/643H/343H-40C.P.R.V series flanged elastic metal hard seal butterfly valve
Nominal diameter Standard value for
length of structure Overall dimensions (reference value) Standard value for
connection dimensions
H Dt373H Dt673H Dt973H PN40MPa
millimeter inches L H1 A1 B1 H2 A2 B2 H3 A3 B3 D1 Z-d
50 2 43 112 350 180 200 625 250 170 530 250 255 125 4-14
65 2 1/2 46 115 370 270 280 625 250 170 530 250 255 145 8 to 18
80 3 49 120 380 270 280 645 250 170 565 250 255 160 8 to 18
100 4 56 138 420 270 280 675 250 170 600 250 255 190 8-22
125 5 64 164 460 380 420 715 450 220 640 250 255 220 8-26
150 6 70 175 555 380 420 800 450 220 705 300 315 250 8-26
200 8 71 208 605 450 470 850 450 220 775 300 315 320 12-30
250 10 76 243 680 450 470 925 450 280 945 300 315 385 12-33
300 12 83 283 825 450 470 1035 650 280 1070 300 315 450 16-33
350 14 92 310 900 480 490 1070 650 280 1140 300 315 510 16-36
400 16 102 340 980 480 490 1190 650 280 1210 300 315 585 16-39
450 18 114 380 1030 640 660 1335 575 714 610 20 to 39
500 20 127 410 1105 640 660 1415 575 714 670 20-42