US 9,519,294 B2Granted

Low pressure pilot operated relief valve

AssigneePentair Flow Services AG

InventorsMichael McNeely, Michael Marcellus, Stephen Simpson

Life of this patent

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Abstract

Embodiments of the invention provide a relief valve body arranged for connecting to a pressure vessel. The relief valve body includes an inlet configured to connect to a pressure vessel and an integrated nozzle downstream from the inlet and extending along an axis. The integrated nozzle includes a nozzle exterior surface, a nozzle bulb, and a valve seat and defines a nozzle expansion region. The relief valve body further includes a redirecting pallet, a valve interior surface having at least one ramped portion downstream from the integrated nozzle and redirecting pallet, and an outlet downstream from the at least one ramped portion.

Claims9

Dependent claims

A relief valve arranged for connecting to a pressure vessel, the relief valve body comprising:

an inlet configured to connect to a pressure vessel;
an integrated nozzle downstream from the inlet and extending along an axis, the integrated nozzle defining a nozzle expansion region and including a nozzle exterior surface, a nozzle bulb defining a substantially protrudent shape that protrudes away from the axis, and a valve seat;
a valve interior surface including a first ramped portion, a second ramped portion, a flat portion, and an arced portion, the first ramped portion expanding a fluid flow area by ramping from a ramp apex around the integrated nozzle to the flat portion and the second ramped portion expanding the fluid flow area by ramping from the ramp apex around the integrated nozzle to the flat portion on an opposite side of the integrated nozzle from the first ramped portion;
a redirecting pallet defining a curved portion and a flat portion that cooperate to direct a fluid flow towards the valve interior surface;
and
an outlet downstream from the first ramped portion and the second ramped portion.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/600,943Filed 20 Jan 2015 · us provisional application
Priority: 17 Jan 2014
Published: US 2015/0205307 A123 Jul 2015
Granted: 13 Dec 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G05D 16/16
With auxiliary non-electric power: derived from the controlled fluid
F16K 1/06
With screw-spindle: special arrangements for improving the flow, e.g. special shape of passages or casings
F16K 17/02
Safety valves; Equalising valves, e.g. pressure relief valves: opening on surplus pressure on one side; closing on insufficient pressure on one side
F16K 27/02
Construction of housing ; Use of materials therefor: of lift valves

Family

Application61/928,850Us provisional application · filed 17 Jan 2014
US 2015/0205307 A1Pre-grant publication · published 23 Jul 2015
US 9,519,294 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

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