Valves and valve actuation – With correlated flow path – Tank
Patent
1979-04-25
1980-09-09
Cline, William R.
Valves and valve actuation
With correlated flow path
Tank
137797, F16K 3150, F16K 5100
Patent
active
042213584
ABSTRACT:
In accordance with the present invention, a top operated tank car valve assembly includes a rod extending downwardly from the top of the tank and is attached to a valve stem of a lading valve closure located in the bottom of the tank. A valve seat for a valve closure is located in an opening in the bottom outlet mounting flange. A valve guide depends from the valve closure. The valve guide includes a center hub and a plurality of vanes extending radially outwardly therefrom and adapted to engage the valve cage as the valve is moved between open and closed positions. The center hub is hollow and is adapted to receive a fastener to attach the valve guide to the valve closure. The fastener includes a threaded inner end to engage the lower portion of the valve closure. A non-round horizontal plate is welded to the fastener which holds a seal retainer in engagement with a seal and the valve closure. A breakage groove is provided in the fastener below the non-round horizontal plate which aligns with the upper surface of the valve guide. An outlet chamber is attached to the tank mounting flange with shearable fasteners. The breakage groove aligns with the mounting flange and outlet chamber interface. If the outlet chamber is impacted, the outlet chamber fasteners and valve guide fastener will shear along a common plane and the outlet chamber and valve guide will be separated from the outlet. However, the non-round horizontal plate located above the shear plane will maintain the seal retainer and the closure seal in place on the valve seat. Thus lading will be prevented from escaping from the tank during such impacts.
REFERENCES:
patent: 1604712 (1926-10-01), Nordstrom et al.
patent: 2257212 (1941-09-01), Willoughby
patent: 3981481 (1976-09-01), Reedy et al.
patent: 4180242 (1979-12-01), Reedy
Basler Glennon L.
Wempe Richard J.
ACF Industries Incorporated
Cline William R.
Cummings Henry W.
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