Valve
First Claim
1. A valve comprising:
- a valve unit;
a passageway in said valve unit, said passageway defining a seat, a seal receiving area and a non-circular inside surface;
an inlet passageway in communication with said passageway;
an outlet passageway in communication with said passageway;
a packing assembly in said seal receiving area of said passageway;
a bonnet having a first end and a second end, said bonnet having an internally threaded area and a non-circular exterior area for complementary engagement with said non-circular inside surface of said passageway of said valve unit, said first end of said bonnet for engaging said packing assembly; and
a valve stem in said passageway in sealing relationship with an inside surface of said packing assembly, said valve stem threadably engaged with said internally threaded area of said bonnet for selectively sealing against said seat.
1 Assignment
0 Petitions
Accused Products
Abstract
A valve, such as a liquid level sight glass gage valve, has a valve unit and a passageway that extends through the valve unit. The passageway has a stem receiving area, a seal receiving area, and a bonnet receiving area that has a non-circular inner perimeter. A packing assembly is provided to isolate the bonnet receiving area from the fluid path. A bonnet is located within the bonnet receiving areas and has a non-circular outside surface for mating relationship with the non-circular inner perimeter of the valve unit. A valve stem is in sealing relationship with the packing assembly and selectively engages a valve seat. The stem threadably engages the bonnet. A bonnet nut is threadably received on the valve unit for securing the bonnet within the valve unit and allowing axial movement of the bonnet against the packing assembly, thereby effecting compression of the packing.
19 Citations
17 Claims
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1. A valve comprising:
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a valve unit; a passageway in said valve unit, said passageway defining a seat, a seal receiving area and a non-circular inside surface; an inlet passageway in communication with said passageway; an outlet passageway in communication with said passageway; a packing assembly in said seal receiving area of said passageway; a bonnet having a first end and a second end, said bonnet having an internally threaded area and a non-circular exterior area for complementary engagement with said non-circular inside surface of said passageway of said valve unit, said first end of said bonnet for engaging said packing assembly; and a valve stem in said passageway in sealing relationship with an inside surface of said packing assembly, said valve stem threadably engaged with said internally threaded area of said bonnet for selectively sealing against said seat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A valve comprising:
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a valve unit having a first end and a second end; a passageway extending within said valve unit from said second end, said passageway defining a seat, a seal receiving area and a non-circular inside surface; an outlet passageway in communication with said passageway; a packing assembly in said seal receiving area of said passageway; a bonnet having a first end and a second end, said bonnet having an internally threaded area and a non-circular exterior area for complementary engagement with said non-circular inside surface of said passageway of said valve. unit, said first end of said bonnet for engaging said packing assembly; and a valve stem in said passageway in sealing relationship with an inside surface of said packing assembly, said valve stem threadably engaged with said internally threaded area of said bonnet for selectively sealing against said seat.
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Specification