Unitized instrument manifold
First Claim
1. In a valve manifold for controlling transmission of high pressure and low pressure signals from a pipeline containing a flow restriction orifice plate to a flow measurement instrument for measuring fluid flow through the pipeline in response to the high pressure and low pressure signals, the valve manifold, including a unitized valve body and first, second, and third valve assemblies, each valve assembly at least partially disposed within the unitized valve body and including a bonnet fixedly secured to the unitized valve body, a valve stem threadably secured within the bonnet and axially movable along a stem axis, and a plug having a sealing surface at one end of the valve stem for selectively controlling flow past the valve assembly in response to rotational movement of the valve stem;
- the unitized valve body including, (a) a first channel through the unitized valve body having first ports at each end thereof and having a first axis, (b) a second channel interconnecting the first channel with a second port for venting pressure from the first channel and having a second axis, (c) a third channel interconnecting the first channel with a third port for inputting the high pressure signal to the unitized valve body, and (d) a fourth channel interconnecting the first channel with a fourth port for inputting the low pressure signal to the unitized valve body, the improvement comprising;
each of the first and second valve assemblies positioned within the unitized valve body along the first channel to selectively control transmission of pressure along the first channel;
the third valve assembly positioned in the unitized valve body along the first channel and between the first and second valve assemblies, such that the sealing surface of the third valve assembly passes through the first axis of the first channel when its valve stem is moved from a fully open position wherein the first channel is roddable to a fully closed position wherein the first channel is not roddable;
an annular seating surface within the unitized valve body spaced radially about the second axis of the second channel for sealing engagement with the sealing surface of the third valve assembly, such that the second port is sealed from the first channel when the third valve assembly is in the fully closed position;
the annular seating surface being positioned radially opposite the bonnet of the third valve assembly with respect to the first axis of the first channel such that the second channel between the first channel and the second port is roddable when the third valve assembly is in the fully open position; and
a flow passageway between the unitized valve body and the plug of the third valve assembly for fluid communication along the first channel between the first and second valve assemblies when the third valve assembly is in the fully closed position.
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Accused Products
Abstract
There is disclosed a unitized instrument manifold which creates a double block and bleed valving arrangement for use with a flow recording or measuring device. The bleed valve assembly permits venting of a first channel to the outside while in the open position yet does not interfere with the flow of fluid through the length of the first channel while the bleed valve assembly is in the closed position. The unitized manifold, including block and bleed valve chambers, may be cleaned by passing a narrow rigid rod through the channels of the manifold.
47 Citations
17 Claims
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1. In a valve manifold for controlling transmission of high pressure and low pressure signals from a pipeline containing a flow restriction orifice plate to a flow measurement instrument for measuring fluid flow through the pipeline in response to the high pressure and low pressure signals, the valve manifold, including a unitized valve body and first, second, and third valve assemblies, each valve assembly at least partially disposed within the unitized valve body and including a bonnet fixedly secured to the unitized valve body, a valve stem threadably secured within the bonnet and axially movable along a stem axis, and a plug having a sealing surface at one end of the valve stem for selectively controlling flow past the valve assembly in response to rotational movement of the valve stem;
- the unitized valve body including, (a) a first channel through the unitized valve body having first ports at each end thereof and having a first axis, (b) a second channel interconnecting the first channel with a second port for venting pressure from the first channel and having a second axis, (c) a third channel interconnecting the first channel with a third port for inputting the high pressure signal to the unitized valve body, and (d) a fourth channel interconnecting the first channel with a fourth port for inputting the low pressure signal to the unitized valve body, the improvement comprising;
each of the first and second valve assemblies positioned within the unitized valve body along the first channel to selectively control transmission of pressure along the first channel; the third valve assembly positioned in the unitized valve body along the first channel and between the first and second valve assemblies, such that the sealing surface of the third valve assembly passes through the first axis of the first channel when its valve stem is moved from a fully open position wherein the first channel is roddable to a fully closed position wherein the first channel is not roddable; an annular seating surface within the unitized valve body spaced radially about the second axis of the second channel for sealing engagement with the sealing surface of the third valve assembly, such that the second port is sealed from the first channel when the third valve assembly is in the fully closed position; the annular seating surface being positioned radially opposite the bonnet of the third valve assembly with respect to the first axis of the first channel such that the second channel between the first channel and the second port is roddable when the third valve assembly is in the fully open position; and a flow passageway between the unitized valve body and the plug of the third valve assembly for fluid communication along the first channel between the first and second valve assemblies when the third valve assembly is in the fully closed position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- the unitized valve body including, (a) a first channel through the unitized valve body having first ports at each end thereof and having a first axis, (b) a second channel interconnecting the first channel with a second port for venting pressure from the first channel and having a second axis, (c) a third channel interconnecting the first channel with a third port for inputting the high pressure signal to the unitized valve body, and (d) a fourth channel interconnecting the first channel with a fourth port for inputting the low pressure signal to the unitized valve body, the improvement comprising;
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8. In a valve manifold for controlling transmission of high pressure and low pressure signals from a pipeline containing a flow restriction orifice plate to a flow measurement instrument for measuring fluid flow through the pipeline in response to the high pressure and low pressure signals;
- the valve manifold including a unitized valve body and first, second, and third valve assemblies, each valve assembly at least partially disposed within the unitized valve body and including a bonnet fixedly secured to the unitized valve body, a valve stem threadably secured within the bonnet and axially movable along a stem axis, and a plug having a sealing surface at one end of the valve stem for selectively controlling flow past the valve assembly in response to rotational movement of the valve stem;
the unitized valve body including;
(a) a first channel through the unitized valve body having first ports at each end thereof and having a first axis, (b) a second channel interconnecting the first channel with a second port for venting pressure from the first channel and having a second axis, (c) a third channel interconnecting the first channel with a third port for inputting the high pressure signal to the unitized valve body, and (d) a fourth channel interconnecting the first channel with a fourth port for inputting the low pressure signal to the unitized valve body, the improvement comprising;each of the first and second valve assemblies positioned within the unitized valve body along the first channel to selectively control transmission of pressure along the first channel; the third valve assembly positioned in the unitized valve body along the first channel and between the first and second valve assemblies for sealing the first channel from the second port when in the fully closed position and maintaining communication between the first and second assemblies along the first channel when in either the fully open or fully closed positions; the sealing surface of the third valve assembly passing through the first axis of the first channel when its valve stem is moved from a fully open position wherein the first channel is roddable to a fully closed position wherein the first channel is not roddable; first, second and third annular seating surfaces each formed by an internal surface of the unitized valve body, the first seating surface spaced radially about the second channel for sealing engagement with the sealing surface of the third valve assembly, the second seating surface spaced radially about the third channel for sealing engagement with the sealing surface of the first valve assembly, and the third sealing surface spaced radially about the fourth channel for sealing engagement with the second valve assembly, each annular seating surface being positioned radially opposite the bonnet of its respective valve assembly with respect to the first axis of the first channel. - View Dependent Claims (9, 10, 11)
- the valve manifold including a unitized valve body and first, second, and third valve assemblies, each valve assembly at least partially disposed within the unitized valve body and including a bonnet fixedly secured to the unitized valve body, a valve stem threadably secured within the bonnet and axially movable along a stem axis, and a plug having a sealing surface at one end of the valve stem for selectively controlling flow past the valve assembly in response to rotational movement of the valve stem;
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12. In a valve manifold including a unitized valve body and first, second, and third valve assemblies each at least partially disposed within the unitized valve body and including a bonnet fixedly secured to the unitized valve body, a valve stem threadably secured within the bonnet and axially movable along a stem axis, and a plug having a sealing surface at one end of the valve stem for selectively controlling flow past the valve assembly in response to rotational movement of the valve stem;
- the unitized valve body including, (a) a first channel through the unitized valve body having first ports at each end thereof and having a first axis, and (b) a second channel interconnecting the first channel with a second port for venting pressure from the first channel and having a second axis, the improvement comprising;
each of the first and second valve assemblies positioned within the unitized valve body along the first channel to selectively control transmission of pressure along the first channel; the third valve assembly positioned in the unitized valve body along the first channel and between the first and second valve assemblies for sealing the first channel from the second port when in the fully closed position and maintaining communication between the first and second assemblies along the first channel when in either the fully open or fully closed positions; the sealing surface of the third valve assembly passing through the first axis of the first channel wherein the first channel is not roddable when the valve stem of the third valve assembly is moved to a fully closed position; an annular seating surface within the unitized valve body spaced radially about the second axis of the second channel for sealing engagement with the sealing surface of the third valve assembly, such that the second port is sealed from the first channel when the third valve assembly is in the fully closed position; and the annular seating surface being positioned radially opposite the bonnet of the third valve assembly with respect to the first axis of the first channel such that the second channel between the first channel and the second port is roddable when the third valve assembly is in the fully open position. - View Dependent Claims (13, 14, 15, 16, 17)
- the unitized valve body including, (a) a first channel through the unitized valve body having first ports at each end thereof and having a first axis, and (b) a second channel interconnecting the first channel with a second port for venting pressure from the first channel and having a second axis, the improvement comprising;
Specification