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US 2009/0242818 A1Published application
Welded diaphragm valve
AssigneeEntegris, Inc.
InventorsJohn A. Leys, Mike Schleicher
Life of this patent
Estimating the term…
Abstract
A diaphragm valve including a valve body, a diaphragm assembly and an actuator assembly having a housing body that isolates the actuator from the ambient atmosphere. The diaphragm assembly is welded to the valve body to reduce and/or eliminate fluid leakage around the diaphragm assembly. Additionally or alternatively, the housing body for the actuator assembly may be welded to the valve body to reduce fluid leakage. The welding may be performed using ultrasonic welding techniques.
Claims20
A diaphragm valve comprising:
- a valve body defining a fluid flow passage with a valve seat therein, the valve body being formed from fluoropolymer material;
- a diaphragm assembly formed from fluoropolymer material including a valve member and a peripheral sealing portion coupled by a flexible diaphragm portion, wherein the peripheral sealing portion is welded to the valve body in a continuous sealing weld such that the diaphragm assembly is operably scalingly attached to the valve body, and wherein the valve member is selectively shiftable between a first position in which the valve member is engaged with the valve seat to block fluid flow through the fluid flow passage and a second position in which the valve member is clear of the valve seat to enable fluid flow through the fluid flow passage;
- and
- an actuator assembly operably coupled with the diaphragm assembly for selectively shifting the valve member between the first and second positions.
1 more element
A diaphragm valve comprising:
- a valve body defining a fluid flow passage with a valve seat therein, the valve body being formed from fluoropolymer material;
- a diaphragm assembly formed from fluoropolymer material including a valve member and a peripheral sealing portion coupled by a flexible diaphragm portion, wherein the peripheral sealing portion is welded to the valve body such that the diaphragm assembly is operably sealingly attached to the valve body, and wherein the valve member is selectively shiftable between a first position in which the valve member is engaged with the valve seat to block fluid flow through the fluid flow passage and a second position in which the valve member is clear of the valve seat to enable fluid flow through the fluid flow passage;
- and
- means for selectively shifting the valve member between the first and second positions.
1 more element
A process of making a diaphragm valve comprising:
- forming a valve body from fluoropolymer material, the valve body defining an inlet passage, an outlet passage, and a fluid chamber with an inner wall and an open side, each of the inlet passage and the outlet passage forming an opening in the inner wall so that the inlet passage, the outlet passage and the fluid chamber are fluidly communicable with each other;
- the valve body further including a valve seat portion surrounding the inlet passage opening in the fluid chamber;
- forming a flexible diaphragm assembly from fluoropolymer material, the flexible diaphragm assembly having a valve member portion and a flexible diaphragm portion;
- and
- welding the flexible diaphragm assembly over the open side of the fluid chamber with the valve member portion facing into the fluid chamber, and wherein the flexible diaphragm assembly is selectively positionable in at least a valve closed position wherein the valve member portion is sealingly engaged with the valve seat portion to block fluid flow through the valve, and a valve open position wherein the valve member portion is spaced apart from the valve seat to enable fluid flow through the valve.
2 more elements
Dependencies are inferred from the claim text.