365bet足球投注网

Contact Us

Fakai Valve Factory Site: Yongxing Industrial Zone, Longwan District, Wenzhou City Tel: 0577-88767789
Fax: 0577-85983279
Mobile: 15958706338
Contact: Mr. Wang Email: 1552028357@qq.com
Website: http://timbuist.com

Slow closing check valve

365bet足球投注网 - Check valve - Slow check valve

DY30BX slow-opening quick-closing check valve

DY30BX slow opening and quick closing check valve structure diagram
DY30BX slow opening and quick closing check valve structure diagram

Scope of application

DY30BX slow-opening and quick-closing check valve opens slowly to prevent current shock and medium pressure shock; fast closing prevents water hammer. No water quality requirements, can be used in sewage, clean water and raw water systems. The valve comprises a valve seat, a valve stem, an upper valve cover and a lower valve cover connected to the valve body. Between the upper valve cover and the lower valve cover is a diaphragm cavity. A diaphragm is arranged in the diaphragm cavity, the diaphragm is connected to the central shaft, the other end of the central shaft is connected to the valve, and the valve is in contact with the valve seat. The water container communicates with the water inlet and outlet control holes of the upper valve cover, the water container and the upper valve cover are in throttling communication, and the water container and the upper valve cover are in one-way communication.

Structural features

Slow-opening and quick-closing check valve adopts double-chamber driving device and Y-shaped structure. The medium has the advantages of semi-linear water flow, maximum flow, small pressure loss, stable opening and closing operation, and no pressure fluctuation in the directional movement. The dual-chamber driving device can be disassembled as a whole for easy inspection. The diaphragm is made of nylon reinforced rubber, which has a long service life. The disc seal can be removed for easier maintenance.

working principle

Installed on the system pipeline or pump outlet. In normal operation, the medium at the inlet side pushes the large valve disc up and at the same time the medium enters the middle cavity through the flow controller. The cavity moves the driving device downward to drive the large and small valve discs to move downward, and closes the valve quickly or slowly to prevent the medium from flowing backward.

Performance parameter

Nominal pressure
(Mpa)
Shell test pressure
(MPa)
Seal test pressure
(MPa)
Applicable medium Medium temperature
(℃)
1.0 1.5 1.1 water 0-80
1.6 2.4 1.76
2.5 3.75 2.75

Part material

Part Name Parts material
Body valve cover WCB
Valve seat Copper alloy
O-ring seal Ding Qing Rubber
Valve stem 2Cr13
spring 50CrVA
Needle valve Copper alloy
Ball valve Copper alloy
Float valve Copper alloy
Micro filter stainless steel

Dimension table

DN L A A1 H H1 F D
mm
D1
mm
D2
mm
n-Φd
mm mm mm mm mm mm PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5
20 180 292 136 342 247 116 105 105 105 75 75 75 58 58 56 4-13.5 4-13.5 4-14
25 180 292 136 342 247 116 115 115 115 85 85 85 68 68 65 4-13.5 4-13.5 4-14
32 180 292 136 342 247 116 140 140 140 100 100 100 78 78 76 4-17.5 4-17.5 4-18
40 240 330 155 395 278 170 150 150 150 110 110 112 88 88 84 4-17.5 4-17.5 4-18
50 240 330 155 395 278 170 165 165 165 125 125 125 102 102 99 4-17.5 4-17.5 4-18
65 250 350 165 405 298 180 185 185 185 145 145 145 122 122 118 4-17.5 4-17.5 8-18
80 285 365 175 430 313 210 200 200 200 160 160 160 133 133 132 8-17.5 8-17.5 8-18
100 360 410 195 510 350 275 220 220 235 180 180 190 158 158 156 8-17.5 8-17.5 8-22
125 400 455 220 560 365 310 250 250 270 210 210 220 184 184 184 8-17.5 8-17.5 8-26
150 455 475 230 585 420 355 285 285 300 240 240 250 212 212 211 8-22 8-22 8-26
200 585 530 255 675 450 460 340 340 360 295 295 310 268 268 274 8-22 12-22 12-26
250 650 623 300 730 470 500 395 405 425 350 355 370 320 320 330 12-22 12-26 12-30
300 800 700 340 760 490 580 445 460 485 400 410 430 370 370 389 12-22 12-26 16-30
350 860 840 415 840 526 640 505 520 555 460 470 490 430 430 448 16-22 16-26 16-33
400 960 880 430 910 570 715 565 580 620 515 525 550 482 482 503 16-26 16-30 16-36
450 1075 930 460 1030 610 780 615 640 670 565 585 600 532 550 548 20-26 20-30 20-36
500 1075 980 490 1135 665 830 670 715 730 620 650 660 585 585 609 20-26 20-33 20-36
600 1230 1060 530 1270 725 920 780 840 845 725 770 770 685 685 720 20-30 20-36 20-39
700 1650 1130 560 1460 865 980 895 910 960 840 840 875 800 800 820 24-30 24-36 24-42
800 1750 1230 610 1640 975 1050 1015 1025 1085 950 950 990 905 905 9285 24-33 24-39 24-48