DISC VALVE WITH MOLDED-IN-PLACE LINER AND REPLACEABLE SEAT

• US 3,675,677 A
• Filed: 04/02/1970
• Issued: 07/11/1972
• Est. Priority Date: 04/02/1970
• Status: Expired due to Term

• Current Assignee: Domer Scaramucci
• Original Assignee: Domer Scaramucci
• Inventors: Scaramucci, Domer
• Primary Examiner(s): Klinksiek, Henry T.
• Application Number:
  US05/025,040
• Time in Patent Office: 831 Days
• Field of Search: 137/315,375,454.2 251/306
• US Class Current: 137/375
• CPC Class Codes: F16K 1/2265 with a channel- or U-shaped seal covering a central body portion
• CPC Class Codes: Y10T 137/7036 Jacketed

Abstract

A disc valve having an elastomer lining molded-in-place therein shielding the valve body from the fluid being handled and forming seals around the valve stem. The disc of the valve is of the offset type and engages a replaceable seat. Dual seats are also disclosed. The combination of the valve body in a surrounding operating housing supporting the valve operator is also disclosed.

Claims

1. A disc valve for controlling the flow of fluid through adjacent pipe sections having pipe flanges on the adjacent ends thereof, comprising:

a valve body having opposite end faces adapted to be engaged by the pipe flanges and a bore therethrough aligned with the pipe sections, a counterbore in one end of the valve body forming an annular shoulder facing the respective end of the valve body;

a valve stem journaled in the valve body extending diametrically across a medial portion of said bore;

an off-set disc secured to the stem within said bore;

a replaceable seat in said counterbore against said shoulder having an elastomer seating surface thereon shaped and sized to mate with the outer periphery of the disc when the disc is turned transversely across said bore to prevent the flow of fluid through the valve, said seat also having an annular elastomer sealing portion engaging the respective pipe flange and preventing the leakage of fluid from the respective pipe section between the valve body and the outer periphery of the seat; and

an elastomer lining molded in lace around the wall of said bore from the seat to the opposite end of the valve body to shield the wall of said bore from the fluid being controlled and form seals around the valve stem, said lining being projected from said opposite end of the valve body and sealingly engaging the respective pipe flange to prevent the leakage of fluid between the respective pipe flange and the respective end face of the valve body.

2. A valve as defined in claim 1 wherein the lining is shaped to provide a radially inwardly extending boss around the valve stem at the opposite sides of said bore, the elastomer in each boss being responsive to the pressure of fluid in the valve for movement into tighter sealing engagement with the valve stem.

3. A disc valve as defined in claim 1 wherein the bore of the valve body has a larger diameter counterbore in the end thereof having the first mentioned counterbore formed therein, and said annular elastomer sealing portion is positioned in the larger diameter counterbore.

4. A disc valve as defined in claim 1 wherein the elastomer on the seat has an interference fit with the lining when the seat is in operating position in the valve body.

5. A disc valve for controlling the flow of fluid through adjacent piping sections having pipe flanges on the adjacent ends thereof, comprising:

a valve body having opposite end faces adapted to be engaged by the pipe flanges and a bore therethrough aligned with the pipe sections, a counterbore in each end of the body bore, each counterbore forming an annular shoulder facing the respective end of the valve body;

a valve stem journaled in the valve body extending diametrically across the medial portion of said bore;

an off-set disc secured to the stem within said bore;

a replaceable seat in each counterbore against the shoulder formed thereby, each seat having an elastomer seating surface thereon sized and shaped to mate with the outer periphery of the disc when the disc is extended transversely across said bore on the respective side of the centerline of the valve stem, each seat also having an annular elastomer sealing portion engaging the respective pipe flange and preventing the leakage of fluid from the respective pipe section between the valve body and the outer periphery of the respective seat; and

an elastomer lining molded-in-place around the wall of said bore between said seats, the lining sealingly engaging a portion of each of the seats, the seats and the lining cooperating to shield the valve body from the fluid being controlled and the lining forming seals around the valve stem.

6. A disc valve as defined in claim 5 wherein the bore thrOugh the valve body has a pair of concentric counterbores in each end thereof, each valve seat slidingly fits in the smaller diameter counterbore at the respective end of the valve body, and the annular elastomer sealing portion of each seat fits in the larger diameter counterbore at the respective end of the valve body.

7. A disc valve for controlling the flow of fluid through adjacent pipe sections having pipe flanges on the adjacent ends thereof, comprising. a valve body having opposite end faces adapted to be engaged by the pipe flanges and a bore therethrough aligned with the pipe sections, the outer periphery of the valve body being substantially cylindrically shaped;

a valve stem journaled in the valve body extending diametrically across a medial portion of said bore;

an off-set disc secured to the stem within said bore;

a replaceable seat in one end of the valve body having an elastomer seating surface thereon shaped and sized to mate with the outer periphery of the disc when the disc is turned transversely across said bore to prevent the flow of fluid through the valve, said seat also having an annular elastomer sealing portion engaging the respective pipe flange and preventing the leakage of fluid from the respective pipe section between the valve body and the outer periphery of the seat;

an elastomer lining molded in lace around the wall of said bore from the seat to the opposite end of the valve body to shield the wall of said bore from the fluid being controlled and form seals around the valve stem, said lining being projected from said opposite end of the valve body and sealingly engaging the respective pipe flange to prevent the leakage of fluid between the respective pipe flange and the respective end face of the valve body; and

an operating housing having a bore therethrough of a size to slidingly receive the valve body and an opening therein receiving the valve stem.

8. A disc valve as defined in claim 7 wherein the length of the operating housing, measured along the bore therethrough, is substantially equal to the length of the valve body between said end faces, and wherein the opening in the operating housing comprises an aperture therein extending at a right angle to the bore therethrough journally receiving a portion of the valve stem.

9. A disc valve as defined in claim 7 wherein the length of the operating housing, measured along the bore therethrough, is substantially equal to the length of the valve body between said end faces, and wherein the opening in the operating housing comprises a slot therein from the inner to the outer periphery thereof having a width greater than the diameter of the valve stem and extending from one end of the operating housing to the medial portion of the operating housing, whereby the valve body may be inserted in the operating housing from said one end with the disc valve and stem installed in the valve body.