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Fakai Valve Factory Site: Yongxing Industrial Zone, Longwan District, Wenzhou City Tel: 0577-88767789
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Slow closing check valve

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

300X slow closing check valve

300X slow-closing check valve structure diagram
300X slow-closing check valve structure diagram

Scope of application

300X slow-closing check valve is composed of main valve, check valve, needle valve, ball valve, micro-filter and pressure gauge. Using hydraulic automatic operation, the main valve can get the best opening or closing speed. To prevent the occurrence of water hammer and water hammer, to achieve the effect of slow closing and noise reduction. Utilizing hydraulic self-control, no other devices and energy are needed, easy maintenance, smooth opening and slow closing. Widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects.

Implementation standards

Design specification QB / T219
Structure length QB / T219
Test and inspection GB / T13927
Flange connection JB / T79, GB9112 ~ 9131, HG20592, SH3406, ANSI B16.5
Product Identification GB / T 12220
Delivery specifications JB / T 7928

Installation diagram

300X slow closing check valve installation diagram

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 and bonnet HT200, QT350, WCB
Valve seat, valve disc Copper alloy / 2Cr13
Sealing ring, O-ring Nitrile rubber
Valve stem 2Cr13
spring 50CrVA
Cylinder liner piston (piston type) 2Cr13
Diaphragm (diaphragm type) Fabric with nitrile rubber
Pressure Relief / Holding Pilot Valve Copper alloy
Needle valve, ball valve Copper alloy
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
20 180 282 200 172 106 116 105 105 105 75 75 75 58 58 56 4-13.5 4-13.5 4-14
25 180 282 200 172 106 116 115 115 115 85 85 85 68 68 65 4-13.5 4-13.5 4-14
32 180 282 200 172 106 116 140 140 140 100 100 100 78 78 76 4-17.5 4-17.5 4-18
40 240 320 210 265 210 170 150 150 150 110 110 110 88 88 84 4-17.5 4-17.5 4-18
50 240 320 210 265 210 170 165 165 165 125 125 125 102 102 99 4-17.5 4-17.5 4-18
65 250 330 215 310 215 180 185 185 185 145 145 145 122 122 118 4-17.5 4-17.5 8-18
80 285 350 220 350 245 210 200 200 200 160 160 160 133 133 132 8-17.5 8-17.5 8-18
100 360 410 230 460 305 275 220 220 235 180 180 190 158 158 156 8-17.5 8-17.5 8-22
125 400 420 245 520 365 310 250 250 270 210 210 220 184 184 184 8-17.5 8-17.5 8-26
150 455 430 260 570 415 355 285 285 300 240 240 250 212 212 211 8-22 8-22 8-26
200 585 440 280 695 510 460 340 340 360 295 295 310 268 268 274 8-22 12-22 12-26
250 650 450 300 780 560 500 395 405 425 350 355 370 320 320 330 12-22 12-26 12-30
300 800 460 320 902 658 580 445 460 485 400 410 430 370 370 389 12-22 12-26 16-30
350 860 470 340 1025 696 640 505 520 555 460 470 490 430 430 448 16-22 16-26 16-33
400 960 480 360 1080 735 715 565 580 620 515 525 550 482 482 503 16-26 16-30 16-36
450 1075 530 395 1030 610 780 615 640 670 565 585 600 532 550 548 20-26 20-30 20-36
500 1075 580 420 1135 665 830 670 715 730 620 650 660 585 585 609 20-26 20-33 20-36
600 1230 600 445 1270 725 920 780 840 845 725 770 770 685 685 720 20-30 20-36 20-39
700 1650 730 495 1460 865 980 895 910 960 840 840 875 800 800 820 24-30 24-36 24-42
800 1750 830 530 1640 925 1050 1015 1025 1085 950 950 990 905 905 928 24-33 24-39 24-48