Tag Archives: ball valve

Tips to Help with Choosing the Right Valve for Your Project

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Valves are useful pieces of equipment that help control, limit, and shut off flow in a system. In a garden irrigation system, you could use valves to control when different plants get watered. While it is universally agreed that valves are helpful, choosing the right valve can be frustrating. We hear many customers make statements like these: “So many types exist! Some of them do similar things! I don’t know what types of valves to use!”

 

In this article, we will outline what makes each unique valve. For basic users, the most important thing to remember is that a valve does one of two things: shut off or regulate. Some valves can do either/both, but this is a simple way to think of what you need a valve to do. It could help you in picking the right valve. We will now cover each of the major valve categories.

 

Ball Valves

Ball valves are a good example of a shut off valve. They use a spherical seating to stop or allow flow. The ball has a hole through the center, so fluid can pass through when the handle is turned to the “on” position. When the handle is turned 90 degrees to the “off” position, fluid hits the solid side of the ball and is stopped.

 

Butterfly Valves

Butterfly valves can function as a shut off valve or as a regulatory valve. They can fully shut off flow or be kept partially open, which limits flow. Controlling flow can be extremely helpful if you want to decrease pressure in a system. Fluid passing through a small opening will be restricted, making pressure further down the pipeline lower, depending on how far open the valve is. Butterfly valves can also be used as typical 90-degree turn valves, just switching between “on” and “off” positions.

 

Gate Valves

Gate valves, while usually used as shut off valves, can also function as regulatory valves. They use a “gate” that drops or lifts to control flow. When the valve is open, the gate is stored in the tall upper section of the valve, which is where gate valves get their unique shape. Unlike the previous two valves, gate valves are not a quarter-turn valve. They use a hand wheel to open/close whereas ball and butterfly valves use a lever handle. This makes it easy to keep them partially open and also makes operation of any kind easier.

 

Check Valves

Check valves come in many forms. The primary function of check valves is to prevent backflow. This makes them regulatory valves, as they control flow direction. Check valves are controlled by the fluid in the pipeline instead an operator, which makes them different from the valves we have previously examined. Check valves come in many different forms, but we will just cover the two most common types.

 

Swing check valves are a type of valve that uses a swinging function to prevent backflow in a system. The clear PVC swing check valve to the right has a disc that swings open if fluid is passing through the desired direction. If anything tries to flow backwards, the disc is pushed closed, stopping flow. Swing check valves create minimal pressure drop, as the disc is pushed completely out of the way when in operation.

 

The other major type of check valve is the ball check valve. Ball check valves use a ball or half-ball seating to eliminate backflow. When fluid passes the desired direction, it hits the rounded side and passes around and through. If fluid tries to flow backwards, it hits the concave side of the half-ball, pushing the valve shut. Due to the fact that fluid must flow around and behind the ball to get through, ball check valves produce moderate pressure drop.

 

Diaphragm Valves

Diaphragm valves, while not one of the most common types of valves, are very interesting and serve a specific purpose. They are perfect for limiting pressure in a system, making them regulatory valves. These valves have a flexible diaphragm that lowers toward or rises from a “weir” or “saddle” seating. The effect is that only a limited amount of fluid is allowed to pass through.

 

Choosing the Right Valve

In the end, picking the right valve depends on what you need it to do. No two jobs are the same, so there is no one-size-fits-all valve solution. However, you should now have all the information you need to make an informed decision.

 

NICO VALVES CORP. is a leading industrial valve manufacturer in Taiwan and China. The company offers various valves such as check valve, ball valve, threaded end valve, wafer check valve etc. If you have any questions, try to check out NICO’s website and feel free to send inquiry to them.

 

Article Source: https://www.pvcfittingsonline.com/resource-center/choosing-the-right-valve/

Ball Valve History & Mystery

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Here is a light hearted history and trivia on the ball valves. Read it and you will never take your natural gas or electricity for granted again, OK so maybe you will…

Ball Valve mystery?

The humble ball valve has a checkered history and somewhat murky origins. It may not be cloak and dagger stuff, but it’s not without mystery… Take a look around to see where the ball valve is indispensable. For example, the ball valves are crucial to the petroleum industry, water, electric power, chemical, paper, pharmaceuticals, food, steel and other fields. If it seems we could not get a long without the ball valve, it’s probably true! Given the importance of the ball valve today, it’s a mystery why it took so long to invent.

Ball Valve history does not go back to ancient Greece or the American Revolution nor does it? The modern ball vale was invented in 1967 or about 1957 according to different sources. Who cares when the ball valve was invented? Besides the patented owner, probably not many people. Still the ball valve was major advancement over plug valves used in the 20th century. The earliest ball valves were commercially available around 1967. For ancient parallels, the ruins of Pompeii turned up a bronze tapered plug quarter turn valve that resembles to the ball valve today. How’s that for a ball valve mystery?

Ball Valve Birth Pains

Ball Valve researchers point to a spherical ball-type valve patented in 1871 led to the invention of today’s ball valve. This ball valve was an all brass valve- brass ball and brass seats. Apparently this ball valve didn’t storm the market and was not mentioned in valve catalogs of the late 1800’s while today’s ball valve is quite a recent invention; the idea for this ball valve has been around about 125 years. The first resilient seated ball valve patent was issued in April, 1945. Legend has it the company’s marketing department could not envision a use for the valve and it was not manufactured. Oh well, that’s the way the ball valve bounces…Given the huge reliance on the ball valve today, it’s a mystery why it took so long for people to invent and use the ball valve.

Ham-Let is a leading ball valve producer in quality, variety and ball valve development. For more info on Hamlet’s ball valve line of products, please contact Ham-Let.

Article Source: http://EzineArticles.com/?expert=Johnny_Mayer

Article Source: http://EzineArticles.com/123681

How to Make a Ball Valve

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Ball valves are used to control the flow of liquids, steam, chemicals and foods. They are simple, inexpensive and reliable valves that are often seen in laboratories, factories and food processing. They consist of a ball that can be rotated — usually through 90 degrees. A hole drilled through the ball, allows fluid flow when the hole in the ball is aligned with the flow. When the ball is rotated, the ball blocks the flow.

Instructions:

1. Clamp the ball in a vice and drill a hole through the ball. A ball with a single hole drilled all the way through it will make a ball valve that switches a single stream on and off. For a more complex valve, turn the ball and drill another hole from the surface of the ball to intersect the first hole. The balls with two holes are used where three lines come together. These ball valves can close off any one, or all three paths.

 

2. Attach a rod to the ball so the rod is perpendicular to the hole that goes through the ball. If you are using a plastic ball, the rod should be plastic and should be attached with crazy glue. If the ball is metal, the rod should be metal and should be welded. In either case, the joint should be polished smooth so the ball valve will move easily. The rod should terminate in simple metal handle. The handle should be attached in such a way that the handle lines up with the flow through the gate.

 

3. Install the ball valve. In the simplest cases this could be a simple as punching a small hole and inserting the ball and rod into a plastic tube. If this is the case, the handle should be attached only after the ball and rod are in place.

 

Article Source: http://www.ehow.com/how_10070341_make-ball-valve.html#ixzz2c1Ocp5a8