411homerepair.com

Latest Articles

How to Improve Your Home Comfort with HVAC

Everyone wants a comfortable home because it provides us security, identity, privacy, control and belonging. But most of all, a home is a place we...

on Nov 26, 2021

5 Ways Hiring a Plumbing Service Can Benefit You

Living in a home with your loving family is one of the best things you can experience in your life. But as you live, your home will need...

on Nov 26, 2021

How to Know Good Roofing Companies

Everyone needs a roof over their head and roofing companies are at the heart of making this happen. Many of these companies have set up shop all...

on Nov 24, 2021

What Size of Best Sump Pump Should You Buy for Your Basement?

Pick a rainy day to try this experiment. Take your current sump pump and run it until the water level recedes to shut off level. Unplug the pump...

on Nov 16, 2021

What you Need to Know About Building a Home

A custom home can be a dream come true. It is your chance to design the perfect house for your family, complete with all the amenities and features...

on Nov 9, 2021

Types of Butterfly Valves

by Guest on Nov 16, 2011

Butterfly valves got their name from their appearance of a single rod surrounded by two semi-circular discs loosely resembling the body of a butterfly. Older cars that used carburetors instead of an electronic fuel injection system were probably the most commonly known types. Often confused with the choke, the purpose of the butterfly valve in the carburetor was to cut off air to the cylinders when the car was cold so that the car could be started with a rich mixture of gasoline and air. As the car would warm-up, a temperature sensor would cause the valve to open up more to let more air into the engine. This is a great example of an actuated butterfly valve where an actuator outside the valve changes the position of the valve based upon an outside condition, in this case, the engine temperature.

The greatest advantage of these valves is that they are inexpensive compared to other types of valves. They are good for low-pressure types of applications where a perfect seal is not required like on municipal wastewater lines. Since the rod and discs are actually in the fluid flow, a drop in pressure is always present as the fluid passing through the valve. Since these valves are so simple, they are also the easiest to maintain of all valve types. But there are downsides too. Since they do not seal well, this type of valve is not good for corrosive materials. Also, since they cause a pressure drop, they may require some kind of bypass valve to pressure balance the system before the valve can be opened in a large installation.

Ball valves in comparison are larger and use a sphere or ball inside the valve with a hole in it that can completely seal when closed and let the fluid pass through the valve with no pressure drop as long as the valve hole is at least as large as the input pipe diameter. Used for high-pressure applications involving corrosive substances and gases, the ball type of valve is more expensive but has the added advantage of never failing to open due to high supply pressure. It is often used for pipes less than six inches in diameter that carries high-pressure gases or liquids which require a reliable cutoff seal.

The spring return butterfly valve is a more complex type that is more energy-efficient but also more problematic. The springs are used to open and close the valve. Since the springs store energy, this makes them more energy-efficient to operate. Special films that reduce friction can also be applied that will increase energy efficiency even further in some applications. There are a wide variety of spring return valves that allow a lot of customization in application and design. However, a spring-loaded valve can have problems where high-speed valve operation may be required such as inside a car engine. When spring goes bad at high speeds it can cause engines to open and close valves at the wrong times or hang open causing a backfire causing potentially severe damage to the engine. For this reason, springs used must be carefully matched to original specification when replaced.

From simple manually operated 90-degree turn type valves to electronically actuated automatic spring return type valves, there are many different styles of butterfly valves. Their main advantages are that they are cheap, simple and reliable. But they do not make good choices for applications requiring high-pressure, corrosive fluids or a tight seal.

Author

Guest

Guest

Most Recent Articles

Sponsored Articles

Random Articles

Air Conditioner Buying Guide - Wholesale A/C

The demand for air conditioners has increased exponentially due to global warming. There are many different types of air conditioners. Before you...

HVAC / Air Conditioning

5 Cheap Additions to Make to Your Home Today

It is easy to think that the only way to improve your home is to spend thousands on major revamps and replacements. This is not true. There are...

Interior Design / Decor

How to Install a Programmable Thermostat

With utility bills constantly on the rise, it is often up to homeowners to take matters into their own hands to help control costs. One of the...

HVAC / Air Conditioning

Landscaping Will Literally Change Your Life

Let's get green today! It can't get any greener than landscaping and it's definitely the best method to get more environmentally conscious and...

Garden / Landscaping / Patio

5 Tips for Replacing Interior Doors

Have you ever thought about how much your interior doors impact the look and feel of your home? When you live in a place for long, the doors like...

Doors / Garages

Actions

Contact Us | Submit Article | 411homerepair © 2021