 Check valve КЗТ
PURPOSE AND SPHERE OF APPLICATION
Check valve is intended to be fitted on tank containers which are transported by water (sea or river), by railway and by car as the complex of locking devices which are charging/discharging device, a locking device and an additional locking device (a plug)
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PERFORMANCE DATA
| Working medium . . . . . . . | liquefied hydrocarbon gas
(the second type of danger
GOST 19433-88) | | Nominal bore, mm | 25, 50 | | Maximum allowable working pressure, PN | 22 | | Design pressure, PN | 22 | | Hydro-testing pressure, PN | 88 | | Exploitation temperature range | -40°С ... +55°С | | Valve type of joining to tank container | flanged | | | | Weight, kg, не более | 18 | | Specified lifetime | 12-15 years | |
VALVE DESIGN
The valve consists of an inner poppet check valve, an outside locking device realized in the form of ball valve, and an additional locking device realized in the form of plug. The inner poppet check valve corresponds to a locking device consisting of the following principal components: a handle (1), a stem (2) with an eccentric cam on the upper part, a valve shaft (3), a gate (5), springs (6, 7), a body (8) with a conjunctive flange, sealing rings (9), and a bushing (19). The outside locking device corresponds to a ball valve consisting of the following principal components: a body (8), a stem (10), a handle (11), a ball (12), ball seats (13), a cap (14), and sealing rings (15, 16, 17). The additional locking device (not illustrated on the scheme) consists of a plug, a sealing gasket, and a fastening nut. There is ring grooving on the body (8) behind the conjunctive flange intended to prevent working media emission from the tank container inner cavity in case of valve body damage. In case of unauthorized loading or applied shock against the outside pert o the valve the body will damage along the ring grooving. The inner part of the valve and the flange and the ball will remain on the tank container and will prevent working media emission from the tank container.
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MATERIAL LIST
| No. | Designation | Materials | | 1 | Handle | Steel 321H (X12CrNiTi 18 9) | | 2 | Stem | Steel 431 | | 3 | Valve shaft | Steel 321H (X12CrNiTi 18 9) | | 4 | Valve | | 5 | Gate | | 6 | Spring | Steel 321H (X12CrNiTi 18 9) | | 7 | | 8 | Valve body | Steel 321H (X12CrNiTi 18 9) | | 9 | Ring | PTFE | | 10 | Stem | Steel 321H (X12CrNiTi 18 9) | | 11 | Handle | | 12 | Valve ball | | 13 | Ball seat | PTFE | | 14 | Cap | Steel 431 | | 15 | Ring | PTFE | | 16 | | 17 | | 18 | |
The Invention "Stop valve for tank containers" is under patent №2154217 with priority of 10.01.2000. The patent holder is "Spectransservice" Co Ltd. Stop valve is produced according to technical documentation, its property rights belongs to "Spectransservice" Co Ltd., Nizhniy Novgorod. | |
