Tilting Disc Check Valve
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- Belinda Lambert
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1 Figures ½ Tilting heck Valve lass 150 olted ap Figure 123 Figure 123½ utt Weld 2 through 36 inches ( mm) STM 216 Grade W F to 100 F ( to 37 ) of onstruction* Inlet ody Outlet ody ody Gasket ody Studs Gaskets Studs 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)
2 Tilting heck Valve Figures ½ lass 300 olted ap of onstruction* Inlet ody Outlet ody ody Gasket ody Studs Gaskets Studs Figure 323 Figure 323½ utt Weld 2 through 36 inches ( mm) STM 216 Grade W F to 100 F ( to 37 ) 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)
3 Figures ½ Tilting heck Valve lass 600 olted ap Figure 623 Figure 623½ utt Weld 2 through 30 inches ( mm) STM 216 Grade W F to 100 F ( to 37 ) of onstruction* Inlet ody Outlet ody ody Gasket ody Studs Gaskets Studs 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)
4 Tilting heck Valve Figures ½ lass 900 olted ap of onstruction* Inlet ody Outlet ody ody Gasket ody Studs Gaskets Studs Figure 923 Figure 923½ utt Weld 3 through 18 inches ( mm) STM 216 Grade W 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)
5 Figures ½ Tilting heck Valve lass 1500 olted ap Figure 1523 Figure 1523½ utt Weld 2 through 10 inches ( mm) STM 216 Grade W F to 100 F ( to 37 ) of onstruction* Inlet ody Outlet ody ody Gasket ody Studs Gaskets Studs 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)
6 ast Steel Tilting heck Valve General Information lass 150, 300, and 600 Valves Features Reduced maintenance is assured because the disc is the only moving part and is designed to minimize flutter in the closed position, thus reducing wear on the pivot pin, disc, and seat. Loss of head is minimized by the balanced disc and its aerofoil design. Streamlined body without pockets contributes to straight-through flow. Short distance of travel, combined with a balanced disc allows rapid closure while minimizing slamming. Drop tight seating is accomplished over the full pressure range because a slight clearance at the pivot pin assures complete seating between the disc ring and body ring. Pivot pins are constructed of stainless steel. Standards These valves comply with the applicable requirements of the following standards: SME SME SME 16.5 Notes Valves under 4" (100 mm) are typically supplied with X trim. Valves 4" (100 mm) and larger are supplied with XU trim. utt weld end dimensions shall be in accordance with SME Figure 2a or Figure 3a (without backing ring) for standard pipe schedules, unless otherwise specified in the purchase order. utt weld ends shall not be produced from flanged end castings unless specifically authorized in writing by RNE Energy Flow Solutions. lass Schedule 150/300 Standard 600 Extra Strong 900/1500 Schedule
7 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 Gasket 6. ody Studs 7. ody Stud Nuts 8. Gasket Studs 11. Stud Nuts
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