RUBBER SWING CHECK VALVE
Pressure: PN 16
Size: 2 to 8 inches (50 to 200 mm)
Brand: SAM
Application: Water
Check valves are automatically actuated. They are opened and sustained in the open position by the force of velocity pressure and closed by the force of gravity. Seating load and resultant tightness are dependent upon back pressure. The disk and associated moving parts may be in a constant state of movement if the velocity pressure is not sufficient to hold the valve in the wide-open and stable position. Premature wear and noisy operation or vibration of the moving parts can be avoided by selecting the size of the check valve on the basis of flow condition.
Sizing swing check valves on this basis may often result in the use of valves that are smaller than the pipe in which they are used, necessitating the use of reducers for installation. The pressure drop will be no greater than that of the larger valve that is only partially open, and valve life will be greatly extended. The added bonus, of course, is the lower cost of the smaller valve.
There is no tendency for the seating surfaces of swing check valves to gall or score, because the disk meets the flat seat squarely without rubbing control upon closing.
Swing check valves are used to prevent reversal of flow in horizontal or vertical pipelines. In vertical lines, or for any angle from horizontal to vertical, they can be used for upward flow only.
The Materials of Parts | |||||
No. | Part Name | Material Group | Material No. | Code No. | Material Standards |
1 | Body | Gray Cast Iron | 0.6025 | GG25 | DIN 1691 or ISO 185 |
2 | Cover | Gray Cast Iron | 0.6025 | GG25 | DIN 1691 or ISO 185 |
3 | Arm | Ductile Cast Iron | 0.7050 | GGG50 | DIN 1693 |
4 | Arm Hinge Pin | Stainless Steel | 1.4021 | X20 Cr13 | DIN 17440 |
5 | Locking Bolt | Copper Zinc Alloy | DIN 1705 or ISO 426 | ||
6 | Disk | Ductile Cast Iron | 0.7050 | GGG50 | DIN 1693 |
7 | Disk Hinge Pin | Stainless Steel | 1.4021 | X20 Cr13 | DIN 17440 |
8 | Spring Pin | DIN 1481 | |||
9 | Body Seat Ring | Copper Zinc Alloy | DIN 1705 or ISO 425 | ||
10 | Seat Washer | NBR | DIN 53538 or ISO 4658 | ||
11 | Cover Gasket | DIN 3754 | |||
12 | Cover Bolts | CK 15 | DIN 933 | ||
13 | Spring Washer (DIN 128) | Spring Steel | Fst | DIN 267-26 |
Designation standard: ISO 9952
Face to Face dimensions: DIN 3202 (F6 Series)
Flange mating dimensions: ISO 7005-2
Pressure testing: ISO 2859-1
Pressure loss test: ISO 9644
Face to Face and Space Requirement Dimensions | |||||||
DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 |
L | 200 | 240 | 260 | 300 | 350 | 400 | 500 |
D | 165 | 185 | 200 | 220 | 250 | 285 | 340 |
K | 125 | 145 | 160 | 180 | 210 | 240 | 295 |
H | 120 | 130 | 145 | 170 | 195 | 205 | 290 |
d2 | 18 | 18 | 18 | 18 | 18 | 22 | 22 |
b1 | 20 | 20 | 22 | 24 | 26 | 26 | 30 |
No. of Holes | 4 | 4 | 8 | 8 | 8 | 8 | 12 |
Weight (Kg) | 12.5 | 19.5 | 22 | 29.5 | 44 | 58.5 | 90 |
d4 | 102 | 122 | 138 | 158 | 188 | 212 | 268 |
Face to Face dimensions (Series F6 as specified in DIN 3202) and space requirement dimensions for PN-16 check valves with PN-16 flange ends (as specified in DIN 2501-1)
Working pressure: PN 16
Body test pressure: 25 bar
Seal test pressure: 16 bar
Temperature: up to 90°C (194°F)