Cast Steel Tilting Disc Check Valve
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1 ast Steel Tilting heck Valve Typical Tilting heck Valve Tilting heck Valves consist of a cylindrical housing, with a pivoted circular disc. The pivots are located just above the center of the disc, and offset from the plane of the body seat. This design gives a bell-crank action to the disc. The seat is of circular bevel type and the disc drops in or out of contact without rubbing or sliding. Features Slamming of check valves is the result of failure of the valve disc to reach its closed position before the fluid flow reversal. Tilting disc check valves have to close rapidly since the disc has a shorter distance to travel and therefore arrives at the seat faster...minimizing a slam. Tilting disc check valves are used to prevent reversal of flow in horizontal or vertical pipe lines. In vertical lines, or for any angle from horizontal to vertical, they can be used for upward flow only. Tilting check valves are automatically actuated. They are opened by velocity pressure, and closed by gravity. Seating load and tightness is dependent on back pressure. The disc and moving parts may constantly move if the velocity pressure is not sufficient to hold the valve in a wide open and stable position. Premature wear and noisy operation or vibration of the moving parts can be avoided by selecting the size of check valve on the basis of flow conditions. The minimum velocity required to hold a tilting disc check valve wide open and stable can be determined by the formula: v = 80 v The value for v is equal to flow in feet per second and where v is the specific volume of the fluid in cubic feet per pound. Sizing 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 not be 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 Standard body design configurations The seat, disc and pivot pins are combined into one subassembly secured to the inlet side of the body with a locking ring in sizes 3" (80 mm) and smaller. This construction avoids the need for extending the pivot pins through the valve body. The seat formed on the end of the inlet body section by cobalt base alloy hard facing deposit in sizes 4" (100 mm) and larger. The pivot pins supporting the disc are inserted through capped and gasketed bearing bosses in the outlet section of the body. 1. ody Inlet Half 2. ody Outlet Half ody Stud Nuts 8. Gasket Studs 11. Stud Nuts
2 Figures ½ Tilting heck Valve lass 150 olted ap Figure 123 Figure 123½ 2 through 36 inches ( mm) F to 100 F ( to 37 ) Inlet ody Gaskets Studs Nuts 13% R Overlay *Standard construction: W-Trim 8, other options are available. Valves 2 2 ½ (50) (65) (80) (100) (125) (200) (250) (300) (350) (400) (450) (500) (600) (750) (900) (203) (216) (241) (292) (330) (495) (622) (698) (787) (762) (838) (825) (965) (1257) (1511) (177) (229) (229) (254) (279) (406) (482) (533) (558) (635) (711) (787) (914) (1117) (1270) (203) (229) (229) (330) (406) (533) (635) (711) (736) (863) (914) (990) (1143) (1371) (1524) Wt (123) (17) (23) (26) (46) (63) (132) (221) (312) (373) (485) (650) (827) (1309) (2172) (3082) Wt (123½) (9) (17) (19) (34) (48) (108) (181) (258) (312) (401) (550) (798) (1027) (1825) (2610)
3 Tilting heck Valve Figures ½ lass 300 olted ap Inlet ody Gaskets Studs Nuts 13% R Overlay Figure 323 Figure 323½ 2 through 36 inches ( mm) F to 100 F ( to 37 ) *Standard construction: W-Trim 8, other options are available. Valves 2 2 ½ (50) (65) (80) (100) (125) (200) (250) (300) (350) (400) (450) (500) (600) (750) (900) (266) (292) (317) (355) (400) (533) (622) (711) (762) (838) (914) (990) (1143) (1371) (1524) (203) (254) (254) (279) (330) (431) (508) (609) (635) (711) (787) (838) (965) (1143) (1447) (229) (254) (254) (355) (406) (558) (635) (762) (762) (914) (1016) (1041) (1143) (1371) (1727) Wt (323) (17) (23) (26) (46) (63) (132) (221) (312) (373) (485) (650) (827) (1309) (2172) (3082) Wt (323½) (9) (17) (19) (34) (48) (108) (181) (258) (312) (401) (550) (798) (1027) (1825) (2610)
4 Figures ½ Tilting heck Valve lass 600 olted ap Figure 623 Figure 623½ 2 through 30 inches ( mm) F to 100 F ( to 37 ) Inlet ody Gaskets Studs Nuts 13% R Overlay *Standard construction: W-Trim 8, other options are available. Valves 2 2 ½ (50) (65) (80) (100) (125) (150) (200) (250) (300) (350) (400) (450) (500) (600) (750) (292) (330) (355) (431) (508) (558) (660) (787) (838) (889) (990) (1092) (1193) (1397) (1498) (203) (254) (254) (330) (381) (406) (482) (558) (660) (685) (762) (863) (965) (1117) (1244) (229) (254) (254) (406) (482) (508) (609) (711) (787) (838) (914) (1092) (1168) (1346) (1524) Wt (623) (30) (49) (52) (100) (148) (195) (328) (469) (666) (830) (1156) (1619) (2179) (3261) (3141) Wt (623½) (27) (31) (38) (74) (121) (133) (197) (371) (478) (605) (891) (911) (2061) (2653) (3499)
5 Tilting heck Valve Figures ½ lass 900 olted ap Inlet ody Gaskets Studs Nuts 13% R Overlay *Standard construction: W-Trim 8, other options are available. Figure 923 Figure 923½ 3 through 18 inches ( mm) F to 100 F ( to 37 ) Valves (80) (100) (125) (150) (200) (250) (300) (350) (400) (450) (381) (457) (558) (609) (736) (838) (965) (1028) (1130) (1219) (279) (304) (355) (406) (508) (635) (711) (787) (939) (1041) (406) (482) (558) (609) (711) (889) (889) (1066) (1143) (1270) Wt (923) (80) (123) (198) (273) (476) (802) (1095) Wt (923½) (48) (74) (129) (210) (344) (653) (730) (911) (1025) (1140)
6 Figures ½ Tilting heck Valve lass 1500 olted ap Figure 1523 Figure 1523½ 2 through 10 inches ( mm) F to 100 F ( to 37 ) Inlet ody Gaskets Studs Nuts 13% R Overlay *Standard construction: W-Trim 8, other options are available. Valves 2 2½ (50) (65) (80) (100) (150) (200) (250) (368) (419) (469) (546) (704) (831) (990) (304) (304) (304) (381) (482) (558) (736) (431) (431) (431) (533) (609) (762) (965) Wt (1523) (80) (123) (198) (273) (476) (802) (1095) Wt (1523½) (48) (74) (129) (210) (344) (653) (730)
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