CHECK-FILLING THROAT Russian patent published in 2017 - IPC F17C13/00 B64D37/00 

FIELD: machine engineering.

SUBSTANCE: check-filling throat comprises a body (1). Body (1) comprises two connecting pipes (2, 3), the seat (5) under the filling valve and the additional valve seat (4) of smaller diameter. The throat is also provided with a removable screening valve installed at screening studies for additional seat (4) of smaller diameter. Both valves are arranged to alternate with the screening installation or filling work and interact with the same set by a screening-refueling device (9) by means of its rod (10). In mentioned rod (10), an opening for supplying test gas or refueling container is made. The filling valve is adapted to cooperate with a plug through the elastic ring, urging the cap nut.

EFFECT: invention simplifies the design and operation.

2 dwg