System and process for equalization of pressure of a process flow stream across a valve
First Claim
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1. A process for equalizing pressure of a flow stream comprising an abrasive fluid across a first process valve, said process comprising:
- providing a flow steam, wherein said flow stream comprises an abrasive fluid;
providing a first pump including a first pump piston having a first pump piston side and a second first pump piston side, said first pump piston side in said flow stream;
providing a first process valve downstream of said first pump piston side of said first pump piston in said flow stream;
wherein a first pressure is provided on an inlet side of said first process valve and a second pressure is provided on an outlet side of said first process valve;
providing a first slave cylinder including a first slave cylinder piston having a first first slave cylinder piston side and a second first slave cylinder piston side, wherein said second slave cylinder piston side of said first slave cylinder piston is in fluid communication with said flow stream;
providing a first non-abrasive fluid line connecting said second pump piston side of said first pump piston with said first slave cylinder piston side of said first slave cylinder piston, wherein said first non-abrasive fluid line comprises a non-abrasive fluid;
providing a first needle valve in said first non-abrasive fluid line between said second pump piston side of said first pump piston and said first slave cylinder piston side of said first slave cylinder; and
opening said first needle valve to permit flow of said non-abrasive fluid between said second pump piston side of said first slave cylinder pump piston and said first piston side of said first slave cylinder to equalize said first pressure with said second pressure.
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Abstract
According to one embodiment, a system and process for the equalization of pressures of a flow stream across one or more valves is provided. A process circuit having clean non-abrasive fluid and at least one slave cylinder for transmitting pressure to a process flow stream is employed.
23 Citations
7 Claims
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1. A process for equalizing pressure of a flow stream comprising an abrasive fluid across a first process valve, said process comprising:
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providing a flow steam, wherein said flow stream comprises an abrasive fluid; providing a first pump including a first pump piston having a first pump piston side and a second first pump piston side, said first pump piston side in said flow stream; providing a first process valve downstream of said first pump piston side of said first pump piston in said flow stream;
wherein a first pressure is provided on an inlet side of said first process valve and a second pressure is provided on an outlet side of said first process valve;providing a first slave cylinder including a first slave cylinder piston having a first first slave cylinder piston side and a second first slave cylinder piston side, wherein said second slave cylinder piston side of said first slave cylinder piston is in fluid communication with said flow stream; providing a first non-abrasive fluid line connecting said second pump piston side of said first pump piston with said first slave cylinder piston side of said first slave cylinder piston, wherein said first non-abrasive fluid line comprises a non-abrasive fluid; providing a first needle valve in said first non-abrasive fluid line between said second pump piston side of said first pump piston and said first slave cylinder piston side of said first slave cylinder; and opening said first needle valve to permit flow of said non-abrasive fluid between said second pump piston side of said first slave cylinder pump piston and said first piston side of said first slave cylinder to equalize said first pressure with said second pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification