초록 ▼

A packing assembly is arranged between a gate valve stem connected to an actuator and a bonnet secured to the valve body. An externally threaded packing sleeve is threaded within the bonnet and has the packing assembly removably connected thereto for movement with the sleeve. The packing sleeve has

A packing assembly is arranged between a gate valve stem connected to an actuator and a bonnet secured to the valve body. An externally threaded packing sleeve is threaded within the bonnet and has the packing assembly removably connected thereto for movement with the sleeve. The packing sleeve has an outer end portion which extends into an easily disassembled actuator body where it is easily accessible to a removal tool for replacing the packing. The valve stem has a beveled shoulder thereon which engages a flexible inner flange on the bonnet in the closed position of the gate valve to provide a tight metal-to-metal surface contact between the shoulder and flange.

대표청구항 ▼

In combination with a gate valve and fluid actuator therefor having a gate valve body, a gate valve mounted in said body for reciprocal movement, a stem connected to the gate valve and Extending therefrom, a bonnet on the gate valve body including a main bonnet body having upper and lower flanges th

In combination with a gate valve and fluid actuator therefor having a gate valve body, a gate valve mounted in said body for reciprocal movement, a stem connected to the gate valve and Extending therefrom, a bonnet on the gate valve body including a main bonnet body having upper and lower flanges thereon, a cylindrical actuator housing mounted on the upper bonnet flange and receiving the stem, a piston mounted within the housing and operatively connected to the stem for moving the gate valve between open and closed positions, a removable connecting ring removably connecting the cylindrical housing to the upper bonnet flange, a packing sleeve about the valve stem and removably secured to the lower portion of the bonnet, said packing sleeve having an upper end portion extending beyond the upper flange of the bonnet, said upper end portion being exposed and adapted to fit a removal tool after the connecting ring and the cylindrical housing have been removed from the upper flange of the bonnet, and a packing assembly between the stem and the packing sleeve.