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Diaphragm Valve Structure

IP.com Disclosure Number: IPCOM000089464D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Kaeb, BD: AUTHOR

Abstract

The arrangement shown in the above figures constitutes an improved configuration for the valve seat and diaphragm structure for a pressure relief valve.

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This is the abbreviated version, containing approximately 98% of the total text.

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Diaphragm Valve Structure

The arrangement shown in the above figures constitutes an improved configuration for the valve seat and diaphragm structure for a pressure relief valve.

Fig. 1 shows this improved structure in connection with a portion of a typical pressure relief valve, having an inlet port 3, which permits fluid to enter a cavity 5, surrounded by a wall 7 of circular shape, in the center of which is located an outlet port 9, comprising a circular orifice with tapered edges, as shown. The outer edges of a diaphragm 11 rest upon shoulders in the wall 7, and the diaphragm 11 has attached thereto, by a suitable bonding material 13, a valve seat 15 of material of different nature than that of the diaphragm 11. Valve seat 15, bonded by the layer 13 of bonding material to the diaphragm 11, has provided in the center thereof an opening 17 having a diameter smaller than the inside diameter of the output orifice.

This center opening functions as a vent hole for entrapped air during the positioning of the seat 15 onto the diaphragm during the bonding operation. The center hole functions to prevent the center from expanding outwardly if voids or occlusions are present at the bond line of the diaphragm and the valve seat 15, and if fluid pressure penetrated through the bond line in such manner to be concentrated at the location of the void. Provision of the center opening allows appropriate relief of such pressure leaks.

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