Valve apparatus
AssigneeJb Valves Limited
InventorAlexander Stuart Jamieson
Life of this patent
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Abstract
A valve apparatus comprises a valve member moveable for controlling flow through a fluid carrying bore. The valve member comprises a valve element coupled to a stem element extending within a stepped stem bore in a stem body, the stem element projecting out from the stem body through a stem bore opening. The valve member is further provided with a pressure-energizable multi-element stem seal within the stem bore, the stem element having a profile which inhibits compete removal of the valve member through the stem bore opening.
Claims12
Valve apparatus comprising:
- a fluid carrying bore;
- a valve member moveable for controlling flow through the fluid carrying bore;
- the valve member comprising a valve element coupled to a stem element extending within a stepped stem bore in a stem body, the stem element projecting out from the stem body through a stepped stem bore opening;
- the valve member further being provided with a pressure-energizable multi-element stem seal within the stepped stem bore;
- the stem element having a profile which inhibits compete removal of the valve member through the stepped stem bore opening,
- wherein the stem element has a stepped portion which engages a stem bearing, and
- wherein the stem bearing engages both a step in the stepped stem bore and the pressure-energizable multi-element stem seal so that the pressure-energizable multi-element stem seal is held within the stepped stem bore.
A method of assembling a valve apparatus, the apparatus comprising:
- a body having a fluid carrying bore for fluid flow there-through;
- a valve member comprising a trunnion and a stem element;
- a stepped stem bore for housing the stem element;
- a loading bore;
- and
- a loading member;
- the method comprising the steps:
- inserting the valve member through the loading bore so that it passes through the fluid carrying bore and into the stepped stem bore opposing the loading bore, the stem element having a flange that limits the extent to which the valve member can pass through the stepped stem bore;
- and
- loading the valve member by way of the loading member introduced into the loading bore,
- wherein the stem element has a stepped portion which engages a stem bearing and wherein the stem bearing engages both a step in the stepped stem bore and a pressure-energizable multi-element stem seal so that the pressure-energizable multi-element stem seal is held within the stepped stem bore.
Dependencies are inferred from the claim text.