We Know PVF a Blog by MRC Global
  • 2017 Audit Lessons Learned
  • How to Size an Actuator - Part 4
  • How to Size an Actuator - Part 3

Defining Double Block and Bleed

By Greg Peterson, Executive Director - Midstream/Upstream Valves & Automation, MRC Global
April 11, 2017 Tags: Valves, Double Block and Bleed, DBB, DIB, Double Isolation and Bleed

A common question we hear from many of MRC Global’s customers concerns the definition of a double block-and-bleed valve. There is confusion because there are many interpretations of the term double block-and-bleed (DBB) when describing valve functionality. It seems that almost every end user and manufacturer has a different idea of what the term means for valve selection, which can result in the wrong specifications or valve type.

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Navigating the EPA's Fugitive Emissions Standards

By Ralph Chaney, Senior Director - Downstream Valves & Automation, Supply Chain Management
March 14, 2017 Tags: Fugitive Emissions, API 622, API 624, API 641, API Testing, Valve Packing

As a leading valve distributor, API fugitive emission standards are something MRC Global addresses on a daily basis. Compliance with these standards and the associated EPA standards are a vital part of the valve selection and sourcing process.

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How a Valve Condition Monitoring System Can Protect your People and Preserve your Production Time

By Tore Juvik, Department Manager - Valve Technology, MRC Global
August 16, 2016 Tags: Valvewatch, Valve Monitoring

In my 28 years in and around the offshore energy environment, I've learned how important a properly functioning valve network is to the safety and operational security of an offshore platform.

Experience shows the best way to efficiently and safely assess the viability of the vital emergency shut off valves is with a condition monitoring system.

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Rethinking the Conventional Options - When a Triple Offset Butterfly Valve is a Better Solution

By Ralph Chaney, Senior Director - Downstream Valves & Automation, Supply Chain Management
February 24, 2016 Tags: Valves, Triple Offset Butterfly Valve, Block Valve, Gate Valve

For many years, the gate valve has been the “go to” valve for isolation, simplicity and availability for process containment. If an application required a block valve, the gate valve was selected 90% of the time. For extreme applications, when the process conditions exceeded the gate valve’s parameters, a ball valve was used. However, we are now seeing that, in certain applications, a triple offset butterfly valve could be a better solution.

The triple offset valve offers many advantages like ease of operation, commercial availability with larger sizes even in alloy materials, and a smaller envelope size and weight.

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