Patent ID: 8702056

Claim:
A valve comprising: a. a body having a first port and a second port with a passage configured to flow a media extending between said first port and said second port; b. a flow-element positioned between said first port and said second port, wherein said flow-element has a stem configured to actuate said flow-element between a closed position and an open position; c. a self-adjusting stem sealing assembly adjacent to said stem and configured to prevent media leakage from the valve, wherein said stem sealing assembly comprises: i. a primary seal seated in an annular space defined by the area between said stem, said body and said bonnet, said primary seal comprising: a bottom sealing element; a top sealing element, a primary force transmitting surface; and a primary force transmitting member configured to transfer a first axial load to said primary force transmitting surface, wherein said primary force transmitting surface is configured to transfer said first axial load to said bottom sealing element and said top sealing element to create a seal between said body and said stem; ii. a secondary seal comprising: a packing configured to expand radially to form a seal with said stem: a secondary force transmitting surface; and a secondary force transmitting member configured to transfer a second axial load to said secondary force transmitting surface, wherein said secondary force transmitting surface is configured to transfer said second axial load to said packing thereby creating a seal between said stem and said primary seal; iii. a tertiary seal; and d. a bonnet secured to said body and configured to secure said flow-element and stem sealing assembly into position.