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DeltaValve isolation valves

The GV851 is a high performance isolation gate valve speci cally designed for clean services within the delayed coker. Such services include steam and water, clean hydrocarbon liquids below coking temperatures, and clean hydrocarbon vapor streams in on/off and modulating services.

The advanced sealing properties of the double live-loaded seats in the GV851 create tight shut off in both open and closed valve positions with virtually no change in seal performance over time. The GV851 works like an automated (linear) goggle blind, providing positive isolation with no cross valve process leakage when utilizing purge steam. The ultra tight seal also allows the valve to be operated with or without body steam purge based on the requirements of the re nery.

The innovative design of the GV851 bonnets and body allow for maintenance and replacement of parts without removing the valve from the line. All valve internals can be replaced through the top of the body when the upper bonnet is removed and the valve body remains connected in line.

The valve’s standard packing box is available with a lantern ring and a purge port for monitoring or purging of the packing box. The packing is live-loaded for long lasting, continuous, and consistent sealing.

The GV851 can be used in on/off or modulating services. Suggested applications include:
• Coke drum vapor discharge PSV
• Utility steam MOV
• Quench water MOV
• Atmospheric vent valve • Quench oil HCGO

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