Valve History

Valves have come a long way from their beginnings, almost 2000 years ago. Technological advancements and human knowledge have continuously allowed new and improved designs to emerge in the valve

What is a Control Valve? Understanding Functions and Types

Control valves are critical elements that regulate flow, pressure, temperature, and level within a process. Without the right valve, even the most advanced plant design

Valve Glossary

A reference tool to help users understand and clarify the meaning of specific terms and concepts within world of valves.

Bidirectionality in Isolation Valves

There are many types of valves used to isolate process flow. Each valve type has its own ability when it is fully closed and in

Butterfly Valves 101

A basic introduction to Butterfly Valves Butterfly Valves get their name from the Butterfly appearance of the disc and stem. The design consists of a

Butterfly Valves — Triple Offset Design

The unique triple offset of the valve means the seating is affected with almost zero friction. The disc lifts off the seat without dragging across

What is a Guided Shear Gate Valve and why is it a Severe Service Knife Gate Valve?

All valves perform a duty. Their ability to perform varies by valve type and internal design features and materials. In addition, knowledge and experience play

Six factors to consider when buying a Severe Service Valve

The term Severe Service Valve (SSV) is commonplace to the industrial valve industry. The problem is no one really knows exactly what it means. CGIS

Allowable Leakage vs. Zero Leakage vs. Bubble Tight

Valve leakage is one of the main issues in industrial processes. Different valve leakage standards are specified by different organizations. Valves go through pressure tests

The Building Blocks of Severe Service Valves (SSVs)

Most of us know when an application is severe. But what is it that makes it severe for a valve? Defining Severe Service Valves (SSVs)

Defining Severe Service Valves

There is no clear or universal industry definition or mechanism to describe and accurately define severe service valves (SSVs) and separate them from general purpose

An Introduction to Severe Service Valves

Severe Service Valves (SSVs) mean different things to different people. Until today, defining SSVs had little if any global agreement or recognition. That is about

Class 150 Does Not Equal 150 psig

Pressure-Temperature Ratings for Valves When it comes to valves, there are guidelines in place to protect workers and the environment from valve failures and leakage.

Types of Knife Gate Valves

There are several versions of the Knife Gate Valve design. It is important to note that some Knife Gate Valves operate in harsh severe service

What is a Knife Gate Valve?

Knife Gate Valves (KGVs) were first created for the Swedish Pulp and Paper industry in the 1920s. The market demanded an inexpensive valve for pulp

Valve Standards

For consistency amongst manufacturers, valves are designed to meet established standards. These standards are set for valve performance, design, materials, and functionality. This article aims

Valve Parts

Valves come in all sorts of shapes and sizes. This is also true with the parts that make up these valves. These components can be

Valve Basics

What is a Valve? A valve is a device that regulates the flow of gases, liquids, or loose materials through an aperture, such as a