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The most commonly used by gemco valve are class i, class iv and class vl. This leakage rate can range from class i to class vi. Valve leakage classes define how much fluid or gas a valve is allowed to leak when fully closed

In this guide, you'll learn Generally, slurry control valves allow a certain amount of leakage past the seat when the valve is fully closed What are valve leakage classes

Valve leakage class chart (quick reference)

Intended for resilient seating valves. The following information describes the different types/classes of leaks and how they affect the status of the truck Become familiar with them and remember when in doubt, notify unit maintenance Class i and ii leaks are considered minor leaks and operations can continue under these conditions

When operating with these types of leaks, fluid. Leakage class vi is known as a soft seat classification The following tables detail for each valve seat leakage class the allowable leakage rate, and the seat leakage test procedure: This blog provides a comprehensive explanation of leakage classes, relevant standards, testing procedures, and how to select the right class for your application

Leakage in control valves refers to the unwanted passage of fluid (gas or liquid) through the valve seat when it is fully closed.

Poor selection of valve packing

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