# US 5,706,848 A · Heat exchanger pressure shutoff valve

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- Number: US 5,706,848 A
- Document ID: US5706848A
- Status: Granted
- Kind: A
- Application number: 08/588,469
- Filed: 1996-01-18
- Granted: 1998-01-13
- Earliest claimed: 1996-01-18
- Inventors: Julian S. Taylor
- Web page: https://patentgrep.com/patent/US5706848A

## CPC

- F16K 17/406: {the fracturing member being a generally elongated member, e.g. rod or wire, which is directly connected to a movable valve member, the breaking or buckling of the elongated member allowing the valve member to move to a closed or open position}
- Y10T 137/1789: Having pressure responsive valve
- Y10T 137/7809: Reactor surface separated by apertured partition
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An excessive fluid pressure safety valve for a fluid processing heat exchanger transferring thermal energy to fluids in the heat exchanger by piping extending through the heat exchanger is formed by a valve, normally maintained open by a pressure responsive collapsible pin, interposed in the thermal energy conductor upstream from the heat exchanger. Fluid pressure above a predetermined value in a tube connecting the heat exchanger with the valve axially moves a piston in the valve toward and collapses the pin to close the valve.

## Claims

### Claim 1

A normally open pressure responsive valve for interrupting thermal energy transfer to a fluid in a fluid processing heat exchanger having thermal energy piping means extending through the heat exchanger, comprising:
an elongated valve body having a lateral bore and counterbore and having inlet and outlet ports forming a fluid passageway normal to the lateral bore and interposed in said piping;
a valve seat intersecting the fluid passageway;
valve bonnet means including a centrally bored and counterbored bonnet closing the body counterbore;
valve means including a valve stem longitudinally slidable through the body and bonnet means bores for opening and closing the fluid passageway;
a piston on said valve stem in the bonnet means counterbore,
said bonnet means having a lateral bore communicating with the bonnet means counterbore between said piston and the inward limit of the counterbore;
a tube connecting the bonnet means lateral bore with the upper limit of the heat exchanger; and,
axially collapsible pin means normally maintaining said valve means in fluid passageway open position and closing said passageway in response to fluid pressure in the heat exchanger above a predetermined value moving said piston in a valve closing direction.

### Claim 2 (depends on 1)

The shutoff valve according to claim 1 in which said pin means comprises:
pin cage means including a plate secured to said bonnet means in axial outstanding relation; and,
an elongated rod-like pin axially extending between said valve stem and said plate.

### Claim 3 (depends on 2)

The shutoff valve according to claim 2 in which said pin cage means further includes:
a plurality of post means surrounding said pin in radially spaced relation for connecting said plate with said bonnet means.

### Claim 4 (depends on 3)

The shutoff valve according to claim 3 in which said bonnet means further includes:
a centrally bored cap overlying the counterbored end of said bonnet.

### Claim 5

A normally open pressure responsive valve for interrupting thermal energy transfer to a fluid in a fluid processing heat exchanger having thermal energy piping means extending through the heat exchanger, comprising:
an elongated valve body having inlet and outlet ports forming a fluid passageway interposed in said piping upstream from said heat exchanger,
said body having a lateral through bore and a counterbore intersecting the fluid passageway;
a valve seat intersecting the fluid passageway in axial alignment with the through bore;
a centrally bored bonnet closing the body counterbore and having a counterbore opposite the body;
valve means including a valve stem longitudinally slidable in the body and bonnet bores for opening and closing the fluid passageway;
a piston on said valve stem in the bonnet means counterbore, said bonnet having a lateral bore communicating with the bonnet counterbore between said piston and the inward limit of the counterbore;
a tube connecting the bonnet means lateral bore with the upper limit of the heat exchanger;
a centrally bored cap closing the bonnet counterbore; and,
axially collapsible pin means normally maintaining said valve means in fluid passageway open position and closing said passageway in response to fluid pressure in the heat exchanger above a predetermined value moving said piston and valve means in a fluid passageway closing direction.

### Claim 6 (depends on 5)

The shutoff valve according to claim 5 in which said pin means comprises:
pin cage means including a plate secured to said cap in axial outstanding relation with respect to the adjacent end portion of said valve stem; and,
an elongated rod-like pin axially extending between said valve stem and said plate.

### Claim 7 (depends on 6)

The shutoff valve according to claim 6 in which said pin cage means further includes:
a plurality of post means surrounding said pin in radially spaced relation for connecting said plate with said cap.