Valve
AssigneeAES Engineering Ltd.
InventorAndrew John Stoney
Life of this patent
Estimating the term…
Abstract
A valve includes a housing having a fluid inlet and a fluid outlet and defining a fluid flow path between the fluid inlet and the fluid outlet. A device is included for restricting the flow between the inlet and the outlet has includes comprise fixed flow restriction device for applying a pre-determined counter-flow pressure and a device for applying an additional counter-flow pressure according to the pressure in an environment external to the valve.
Claims17
A valve comprising a housing having a fluid inlet and a fluid outlet, the housing defining a fluid flow path between said fluid inlet and said fluid outlet, the valve further comprising means for restricting the flow between said fluid inlet and said fluid outlet, said means comprising fixed flow restriction means for applying a predetermined counter-flow pressure and means for applying an additional counter-flow pressure according to the pressure in an environment external to said valve.
An apparatus device for providing forced circulation of barrier fluid to a mechanical seal, said including fluid pumping means and a valve, said valve comprising a housing having a fluid inlet and a fluid outlet, the housing defining a fluid flow path between said fluid inlet and said fluid outlet, the valve further comprising means for restricting the flow between said fluid inlet and said fluid outlet, said means comprising fixed flow restriction means for applying a pre-determined counter-flow pressure and means for applying an additional counter-flow pressure according to the pressure in an environment external to said valve.
A barrier fluid supply apparatus for a mechanical seal, comprising:
- an apparatus device for providing forced circulation of barrier fluid to a mechanical seal, said including fluid pumping means and a valve, said valve comprising a housing having a fluid inlet and a fluid outlet, the housing defining a fluid flow path between said fluid inlet and said fluid outlet, the valve further comprising means for restricting the flow between said fluid inlet and said fluid outlet, said means comprising fixed flow restriction means for applying a predetermined counter-flow pressure and means for applying an additional counter-flow pressure according to the pressure in an environment external to said valve;
- and, a vessel for accommodating the barrier fluid.
A mechanical seal assembly, comprising:
- a mechanical seal;
- and,
- a barrier fluid supply apparatus comprising:
- an apparatus device for providing forced circulation of barrier fluid to a mechanical seal, said including fluid pumping means and a valve, said valve comprising a housing having a fluid inlet and a fluid outlet, the housing defining a fluid flow path between said fluid inlet and said fluid outlet, the valve further comprising means for restricting the flow between said fluid inlet and said fluid outlet, said means comprising fixed flow restriction means for applying a pre-determined counter-flow pressure and means for applying an additional counter-flow pressure according to the pressure in an environment external to said valve;
- and,
- a vessel for accommodating the barrier fluid.
Dependencies are inferred from the claim text.