Comparing ANSI Flanged Gate Valves and ANSI Flanged Ball Valves and Wafer Ball Valves Flanged Gate Valves have been around for a long time and are Typically Less Expensive to Puchase than an equivalent Flanged Ball Valve. Flanged Gate Valves, however Typically Leak through the valve 3-5%. If you need Tight Shutoff, you may want to consider using a Flanged Ball Valve. A Newer Type of Flanged Ball Valve is the Wafer Ball Valve. The Wafer Ball Valve can Save you Purchase Cost, Space and Weight over ANSI Flanged Ball Valves.
ANSI Gate Valve
ANSI Flanged Gate Valves Flanged Gate Valves were the predominant shutoff or isolation valve of choice for many commercial and industrial applications in the past and continue to have some popularity today. Some of issues with Gate Valves were thru-valve leakage of about 3-5% and Multiturn Rising Stems which required overhead space that was not always available.
Actuated ANSI Flanged Gate Valves Gate Valves can be Actuated / Automated with either an Air Cylinder or a Linear Electric Actuator. In either case, it makes a Tall Valve even Taller because the Air Cylinder or Linear Electric Actuator must retract a Distance Equal to Stem Travel.
ANSI Flanged Ball Valve
ANSI Flanged Ball Valves When Flanged Ball Valves were introduced, the primary advantages over Gate Valve was that they were bubble tight shutoff and the ball/stem/handle rotation was 90 degrees, so height was not as much of an issue. Because they needed to be direct replacements for Flanged Gate Valves, the Flanged Ball Valves needed to be drop into place replacements. That required them to meet the ANSI Face-to-Face Dimension. This made it easier for Maintenance Workers to install them as no welding or rework was required. In order to meet the ANSI requirement, the valves were actually designed to be longer and were heavier than they needed to be to perform function.
Actuated ANSI Flanged Ball Valve Flanged Ball Valves are becoming Easier to Actuate / Automate as many Valve and Actuator Manufacturers are Conforming to the New ISO5211 Standards. The Standard Primarily Defines the Bolt Hole Circle and the Square Shaft Dimension for Both Valves and Actuators. In the Past, many Valves and Actuators used a Variety of Bolt Hole Spacing and the Shaft Shapes and Dimensions also Varied. Splined, DD (Oblong), and many other Ball Valve Shaft Shapes Required Custom Brackets and Couplings to Mate the Various Valve and Actuators Dimensions. Many Valves and Actuators can Now be Direct Mounted, which can Reduce the Height of the Valve and Actuator by 2 or More Inches.
ANSI Wafer Ball Valve
Flanged Wafer Ball Valves Recently a new style of Ball Valve has been gaining favor in both Commercial and Industrial Application for new installations. That is the Wafer Ball Valve. The Wafer Ball Valve is typically Lower Cost, Lower Weight and takes up Less Space than an equivalent Split Body Flange Ball Valve.
Actuated Wafer Flanged Ball Valves Wafer Ball Valves can be Automated / Actuated with Electric Actuators and Air Actuators. They Normally Require a Bracket and Coupling to Mount the Actuator. Wafer Ball Valves are typically easier and less costly to actuate than Flanged Gate Valves. The Overall Height is also Less Than a Flanged Gate Valve.
The Bracket Height of the Gate Valve needs to be Taller than the Flanged Ball Valve and the Wafer Ball Valve as it the Electric Actuator Vertically Extracts the Stem from the Gate Valve.
Electric Gate Valve
Contact S&K Automation for your Gate Valve, Ball Valve, Butterfly Valve, Control Valve and Multiport Valve and Actuator Applications at 1-888-813-6331 Toll Free in USA.
SK-Automation.com is a Leading North American Valve Integrator and Supplier of Ball and Butterfly Valves, Air Operated Ball and Butterfly Valves, Electric Ball and Butterfly Valves, Globe Style and Vball Control Valves
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