Process diaphragm seal
First Claim
1. A process diaphragm seal, comprising:
- a diaphragm seal body having a seal body ring portion surrounding a cavity for receiving a fill fluid, the seal body ring portion including a seal body ring inner portion near the cavity and a seal body ring outer portion farther away from the cavity than the seal body ring inner portion;
a diaphragm having an active area that operates at least partially over the cavity and a diaphragm ring portion surrounding the active area and sized to correspond to the seal body ring portion, the diaphragm ring portion including a diaphragm ring inner portion that corresponds to the seal body ring inner portion, a diaphragm ring outer portion that corresponds to the seal body ring outer portion, and a diaphragm ring back surface for contacting the seal body ring portion;
a first weld of the diaphragm ring outer portion to the seal body ring outer portion that forms a closed path around the seal body ring portion; and
a second weld of the diaphragm ring inner portion to the seal body ring inner portion that forms a closed path around the cavity, wherein the diaphragm ring back surface between the first weld and the second weld is in substantially continuous contact with the seal body ring portion and wherein the opposite side of the diaphragm ring portion from the diaphragm ring back surface between the first weld and the second weld provides a gasket surface for contacting an opposing surface when the process diaphragm seal is installed in a process fluid container.
1 Assignment
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Accused Products
Abstract
A process diaphragm seal includes a diaphragm seal body having a seal body ring portion surrounding a cavity and a diaphragm having a diaphragm ring portion. The diaphragm ring portion includes a diaphragm ring outer portion that corresponds to a seal body ring outer portion of the seal body ring portion and a diaphragm ring inner portion that corresponds to a seal body ring inner portion of the seal body ring portion. A first weld of the diaphragm ring outer portion to the seal body ring outer portion forms a closed path around the seal body ring portion. A second weld of the diaphragm ring inner portion to the seal body ring inner portion forms a closed path around the cavity. Between the first and second welds a diaphragm ring back surface is in substantially continuous contact with the seal body ring portion.
49 Citations
22 Claims
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1. A process diaphragm seal, comprising:
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a diaphragm seal body having a seal body ring portion surrounding a cavity for receiving a fill fluid, the seal body ring portion including a seal body ring inner portion near the cavity and a seal body ring outer portion farther away from the cavity than the seal body ring inner portion; a diaphragm having an active area that operates at least partially over the cavity and a diaphragm ring portion surrounding the active area and sized to correspond to the seal body ring portion, the diaphragm ring portion including a diaphragm ring inner portion that corresponds to the seal body ring inner portion, a diaphragm ring outer portion that corresponds to the seal body ring outer portion, and a diaphragm ring back surface for contacting the seal body ring portion; a first weld of the diaphragm ring outer portion to the seal body ring outer portion that forms a closed path around the seal body ring portion; and a second weld of the diaphragm ring inner portion to the seal body ring inner portion that forms a closed path around the cavity, wherein the diaphragm ring back surface between the first weld and the second weld is in substantially continuous contact with the seal body ring portion and wherein the opposite side of the diaphragm ring portion from the diaphragm ring back surface between the first weld and the second weld provides a gasket surface for contacting an opposing surface when the process diaphragm seal is installed in a process fluid container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process diaphragm seal, comprising:
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a diaphragm seal body having a seal body ring portion surrounding a cavity for receiving a fill fluid, the seal body ring portion including a seal body ring inner portion near the cavity and a seal body ring outer portion farther away from the cavity than the seal body ring inner portion; a diaphragm having an active area that operates over the cavity and a diaphragm ring portion surrounding the active area sized to correspond to the seal body ring portion, the diaphragm active area being corrugated, the diaphragm ring portion includes a diaphragm ring inner portion that corresponds to the seal body ring inner portion, a diaphragm ring outer portion that corresponds to the seal body ring outer portion, and a diaphragm ring back surface for contacting the seal body ring portion; and attachment means for attaching the diaphragm ring portion to the seal body ring portion such that the diaphragm ring back surface is in substantially continuous contact with the seal body ring portion. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for producing a process diaphragm seal, comprising:
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fixing in a predetermined diaphragm seal body position a diaphragm seal body having a diaphragm side, a coupling side, a cavity on the diaphragm side, a cavity passage between the cavity and the coupling side, and a seal body ring portion surrounding the cavity; positioning a diaphragm having an active area and a diaphragm ring portion so that the diaphragm ring portion contacts the seal body ring portion; bonding the diaphragm ring portion to the seal body ring portion with a first weld that forms a closed path around the seal body ring portion and the cavity; creating a differential pressure across the diaphragm such that the diaphragm is deflected toward the cavity and seal body ring portion such that a space between the seal body ring portion and the diaphragm ring portion is substantially devoid of air; and while maintaining the differential pressure, bonding the diaphragm ring portion to the seal body ring portion with a second weld that forms a closed path around the cavity. - View Dependent Claims (20, 21, 22)
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Specification