Trunnion Ball Valves

Trunnion Ball Valves

A trunnion valve is a valve made up of a round cylinder with an interior chamber in which water flows through to the exterior. A trunnion valve uses a ball at the center that rotates into a closed position at a pre-determined angle. When this closed position is opened, water is forced to flow out from the interior chamber. The water then goes through a pipe that carries the water to its final destination.

A trunnion is a closed ball that allows water to pass through at a very high velocity. A trunnion valve can be used in all types of applications where high pressure is required. A trunnion valve is also used as a safety valve when high pressure is being used.

In order for a trunnion to work, the ball must be closed at a certain angle. In a trunnion valve, this is achieved by having an internal rotating shaft with two shafts at either side. The first shaft rotates with the water coming from the pump, while the second shaft is stationary and is fixed with an external ring or sleeve.

The length of the shafts is important because it determines how the water passes through the ball. If the shaft is long, then water will pass through at a lower velocity, while if it is short, then the water will be flowing at a higher velocity. To help in determining the correct length of the shaft, one should measure the diameter of the pump that will be used.

Another reason for using trunnions is that they can reduce the risk of an explosion and leak when high pressure is applied. These valves are typically used in chemical plants and large facilities, such as a chemical plant. There are many different types of trunnions available for different applications, such as on an industrial level and on a domestic level.

Trunnions have been around since the 1970s. The name is derived from the Greek word "trunnos" which means "turning." Trunnions can also be called "turning valves."

They are mainly used in industrial purposes, but they are also used in residential applications. In a home or office setting, these valves are used to prevent leakage of water in places such as basements and shower heads. These units are also often installed in commercial buildings in order to protect the area where water is being used. In some cases, they can even be used on sinks and countertops to prevent leaks from occurring.

Industrial uses for trunnions include refrigeration systems, water heaters, fire hydrants and fire pits. Because of their ability to resist pressure and flow very quickly, they are also used in many types of mining applications. They are often found on mining equipment and on trucks.

One can find a trunnion valve in a variety of sizes, including small, medium and large ones. Some require a manual turn or a remote control to operate. Most are sold as a complete unit, which includes the valve, the rotational shaft, a ring or sleeve, an external sleeve and a valve seat.

The Single Best Strategy To Use For Trunnion ball valve

The Single Best Strategy To Use For Trunnion ball valve

3-piece trunnion mounted ball valves go just one step forward of the two-piece design and style. They've three pieces of housing which have been bolted jointly.

Trunnion mounted ball valves are Employed in both of those significant-strain and lower-strain programs. In large-stress applications, the valve maintains its torque as any added tension over the seats and ball is absorbed because of the trunnion.

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Any included tension about the valve is absorbed from the trunnion and also the stem. This suggests the valve desires a reduced functioning torque plus a smaller sized actuator.

Various patterns of ball valves supply the pliability of selection so that you can choose the valve that satisfies your necessities.

Trunnion mounted ball valves are available in a variety of configurations. They're extremely customizable so you can pick the sizing, form, and actuator that fits your requirements.

Or incorporate a bleed system into a two-piece or a few-piece trunnion ball valve to aid make improvements to its sealing skills. The double block and bleed functionality can make it achievable to flush the valve stressed and verify the seats are sealing correctly.

Welded Body Ideal for buried support applications to lower probable leak points and minimize probable of fugitive emissions from flanges.

Ball valves are created in various physique arrangements. Determined by this valve can be classified in the next strategies;

Among the list of stand-out capabilities of trunnion mounted ball valves is they can have a double block and bleed capabilities. You may use numerous trunnions mounted ball valves to create a double block and bleed valve.

The stem of the trunnion mounted ball valve connects the ball towards the actuator. It is actually linked to the ball by welded joints and it controls the movement of your ball.

Geared up with a professional manufacturing facility, Naibang Valve is a specialist manufacturer and supplier of solid metal trunnion mounted ball valve in China.

This valve features two pieces of housing which can be linked to one another by threaded connections. It is not hard to open up 1 piece of housing to entry the valve for cleansing or maintenance. However, the valve has to be disengaged in the pipeline prior to the housing might be taken off. 

Trunnion ball valves have strengthened anti-blowout stems, that’s why they are able to handle cryogenic and superior-temperatures without the need of sustaining any destruction.


About Trunnion ball valve

About Trunnion ball valve

Trustworthy, bubble-restricted shut off is important for isolation valves, but hostile assistance situations �?corrosive or abrasive environments and large pressures �?location significant requires on valve effectiveness.

Trunnion valves are actually introduced to manage Along with the size limits of normal floating valves outlined earlier mentioned. In truth, in this sort of valves the shaft, the ball, plus the supporting trunnion work as a single stable assembly ready to resist the heavy loads created by balls of huge Proportions.

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KTM Virgo Sequence trunnion mounted ball valves are made to make maintaining a secure method simpler with features just like a blowout-proof stem, API 607/6FA fireplace basic safety certification, built in antistatic equipment, and extra wall thickness for amplified corrosion resistance, to call a couple of.

During the picture down below, it is possible to see the three-way ball valve. A ball, seat rings, stem, as well as other internals established inside the much larger entire body section and held together with lesser areas by bolting. In this design, a valve system is divided into two or a few human body parts.

Considering that the seats of the trunnion mounted ball valve are spring-loaded, even reduced pressures can push them versus the ball. This restricted seal stops the circulation of oil as well as helps prevent oil from moving into The interior elements of the valve. 

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To lower torque even at significant working ranges, the trunnion-mounted stems absorb line tension and lessen friction among balls and seats.

You are able to see this inside the picture.  In this particular style and design steam and ball do the job as only one device. The ball is supported by two floating or spring-loaded seats that remain in constant contact with the ball.

Argus FK76M trunnion mounted ball valves are engineered to provide prolonged-lasting, limited shut-off functionality in oil and gas, petrochemical and chemical marketplace programs. It encompasses a modular layout that permits simplified adaptation to numerous basic safety, emissions and efficiency requirements. The FK76M ball valve is on the market in normal and severe assistance styles and features steel-seated and soft-seated configurations for trusted sealing efficiency.

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Trunnion ball valve for Dummies

Trunnion ball valve for Dummies

The bore of the valve is the opening that is observed in the midst of the disk or ball. Trunnion mounted ball valves have two types based upon bore size.

Every depth is built to minimize servicing even under Extraordinary running disorders, considerably minimizing operational Charge over the whole valve lifetime.

Our trunnion valves have bolted A 3-piece entire body that incorporates double O-rings or a combination of O-rings and gaskets, well suited for buried or earlier mentioned-floor installation. In addition they aspect double piston, self- relieving seats with Inconel® seat springs. Get hold of us To find out more on how we are able to customize your trunnion mounted ball valves.

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Most ball valves are of the short-performing variety, which requires a 90° transform of your valve tackle to function the valve. BLOWOUT-PROOF STEM Style: Valves are designed with stem/system relationship protecting against stem blowout under line tension.

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Most ball valves are of the fast-performing type, which needs a ninety° turn from the valve take care of to work the valve.

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This reduces expenditures and causes it to be easier to work the valve. 3-piece trunnion mounted ball valves are also very easy to fix, clean, swap, and sustain as you have only to remove a person piece to entry the Operating aspects of the valve.
Various patterns of ball valves offer the flexibleness of assortment so that you could pick the valve that fits your prerequisites.
Trunnion mounted ball valves are very talked-about within the piping marketplace. That is given that they can tackle distinct varieties  of applications and mediums which includes liquid, gasses, and slurries. Below are a few of probably the most favorable benefits of using trunnion mounted ball valves.


What is a ball valve?

What is a ball valve?

Ball valves are used in almost all industrial processes, including water and wastewater treatment, mining, power generation, oil, gas and petroleum processing, food production, manufacturing. chemicals and plastics and many other fields. 

Ball valve is composed of a ball with a hole and rotates to control the flow through it. Ball valves are often used in factories with ball valves, crank ball valves, pneumatic ball valves or electrically controlled ball valves.

Structure of ball valve

The internal structure of the ball valve consists of a ball with a hole for the passage of the medium. The ball is held tightly between two sealing rings (seat). The lever / handwheel is installed at the top of the valve seat. When turning the lever / handwheel at a 90 degree angle, the valve will be in the closed position or the open position. Therefore, ball valves are also quick-open type. Because of their shape, ball valves are slippery and easier to operate than plug valves. So reducing friction between the ball and the sealing rings during operation therefore they do not require lubrication. The lever of the ball valve is similar to the stopper valve which will lie parallel to the flow when the valve is in the open position. When the handle is perpendicular to the pipe, it is in the closed position. This makes it easy to locate the operating status of the valve.

Materials of ball valve construction

The valve body can have many types of materials, one of which is:


Stainless steel

Brass (brass)



Titanium (titanium)




And many more ...

There are many types of materials for the production of SEAT valves (ball bearings and valve body). Each material has its own application and is suitable for chemical compatibility, pressure and temperature. Some frequently used materials are:




Reinforced Teflon (RTFE)






Virgin Teflon (TFE)

UHMW Polyethylene (UHMWPE)



Types of ball valves

Ball valves are divided into several categories based on the valve's structure, or on manual or electrical operation (actuators).


A / Based on the valve body structure


There are 5 common types of ball valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the parts of the valve - especially the ball bearing housing - are manufactured and assembled. The valve operation is the same in each case.


Full port.

Reduced port or reduced bore.

V port.

Cavity filler.



B / Based on the transmission


Pneumatic ball valve: Part of the ball valve comes with a compression action that helps the valve change its state from closed to open and vice versa.

Electrically controlled ball valve: The accompanying ball valve is an electric actuator that helps the valve change its state from closed to open and vice versa.

Reference: learn electric ball valve


Principle of operation of the ball valve

To learn more about how ball valves work, please watch the video below:


Pros and Cons of Ball Valves



Ball valve is durable, works well after many cycles, and reliably, opens / closes easily, safely even after long periods of non use. It is these factors that make them a preferred choice for open / close and control applications where they are often preferred for use over globe valves or swing valves. However, ball valves lack good control in flow control applications. Together with its simple construction, flexible operation and repair, ball valves are widely used in industry, supporting pressure up to 1000 bar and temperature up to 752 ° F (400 ° C). Ball valve sizes usually range from DN8 to DN2000 ..




Although ball valves are used in many places to replace globe and gate valves, ball valves do not regulate the desired flow as a damper.

The ball valve is a series of quick opening / closing valves, so the friction pressure between the ball body and sealing gasket is enormous. Therefore, these parts are often prone to damage during use.

Ball valves cannot be used in dirty or thick environments. In the case of thick media, you can switch to a gate or butterfly valve.

Famous Brand Ball Valves In The Market

Like other industrial valves, ball valves are also manufactured in many countries around the world. There are countries with the world's leading developed industries such as Germany, USA and Japan. Or if the product is just fine, and the desire is cheap, you can choose from Taiwan, China ...


Currently, in the industrial valve market in Vietnam. You can select brands of industrial ball valves such as:


KSB Armaturen / Germany.

Metso / Germany.

Zetkama / Poland.

JOEUN / Korea.

TUNGLUNG / Taiwan.

NVS / Taiwan.

Rizzio/Italy brand

Chinese brands.

With the brand of ball valves, there are different strengths and weaknesses. Please consider carefully before choosing to buy! 

Above is an article sharing knowledge about ball valves in the series of articles about industrial valves in italy. Although we have tried to edit and complete it in the most complete and detailed way. 

If you have any problems about industrial valve products or need advice on choosing industrial valves DO NOT HESITATE to contact us rizzio valvole

An Impartial View of Valves for Swimming Pools

An Impartial View of Valves for swimming Pools

The spring check valve can be found in an opaque or crystal clear housing. It is available in various spring tensions so a user can adjust the flow needed to open the valve. It utilizes one of a kind in-line plunger to influence a smooth and successful outline.

Check the company's installation guide if you are in need of a valve for vertical installation. Check valves are usually installed horizontally, and a few can be set up vertically. Ball valves for swimming pools utilize an on and off application which makes them an easy mechanism for maintaining good water flow. Eventually, you are going to want to replace the gasket, or the full valve (a simpler job).

Butterfly valves utilize a spinning paddle plate to correct water flow. Like all valves, they need to be operated periodically to ensure reliability. Since they are used in many applications, there are different requirements for maintenance on the type of media in the system, and the different ways the valve can be affected by the fluids passing through it.

Jandy valves and Push-Pull Valves ought to be lubed each year. No other valves ought to be open. These non-return valves are simple to install to any current pipework. As a consequence, it's tough to check such relief valves.

For the majority of our clients, a pool is somewhere to relax. It should not be refilled with water until this is done. Concrete pools and gunite pools are a few of the most frequent kinds of in-ground swimming pools in America.

Your pool may have a spa, known as a pool-spa combo'' so there'll be an extra valve for the spa primary deplete. These pools are commonly made in a more conservative size, which implies you can swell it effortlessly with a normal hand pump. For the work required with diving a major opening in your garden and after that filling it in with the suitable materials and gear, an in-ground pool is an exorbitant prospect.

A pool may be an excellent luxury, but in addition, it will come with its share of expenses. Concrete pools are poured on the website into wooden forms, a procedure that may be labor-intensive. When you're installing a costly pool, or are accountable for maintaining one, place your trust in PVC.

Swimming pools are a pleasant and loosening up extravagance for your living arrangement. They can be a brilliant expansion to the home, and they can possibly give interminably enjoyable to children and grown-ups alike. So far as their quality, you need to choose those swimming pools, which are produced using the most astounding quality textures, for example, PVC and canvas for instance.

Many homeowners wish to know precisely what it will cost to repair a pool, but the precise amount can differ on a number of factors that range from the sort of pool, its size, and the seriousness of the problem that must be fixed. A seasoned pool maintenance contractor ought to be consulted before emptying an in-ground pool. Valve manufacturers aren't very inventive when it must do with names, but they're crafty with regard to design. Our pool kits and pool plans are going to have you swimming in an excellent pool at the most economical price possible.

Details of An Introduction to the Development of Valves

Details of An Introduction to the Development of Valves

The various forms of valves reach the many different requirements. The valves absorb wind that's required to power the vehicle. To be able to regulate or stop the flow with a fitting, an individual valve must be used. Valves, as a considerable mechanical part, play a crucial role both in industrial procedure and everyday life. Broadly speaking, the valves settled in the household appear to be easy and easy controlled. The sample solution doesn't pass through peristaltic pump tubing ahead of the valve. Click here to know more details about An Introduction to the Development of Valves.

The nutrient solution is kept in a reservoir that could be found under the grow table. Folks attempt to regulate the stream of water in rivers or streams by utilizing huge rocks or tree trunks to block the circulation of water or change water flow direction then. It's important to get enough air velocity in the vacuum system to work. Evidently, it will occasionally be essential to report the identical measurement in two log books. A qualitative analysis forms a sizeable part of the research efforts as well. Flow Injection Analysis is regarded as an acceptable alternative to equivalent segmented flow procedures. The industry attractiveness analysis explains the level of competition on the market in various regions.

As the principal job of the gearbox is to convert engine speed to torque in order to push the vehicle forward, it's indispensable for your vehicle. Also, it's an effort at attempting to mimic the manner music of different genres, aside from jazz, are being presented to their listeners. Significant strategy and action must conserve the briefcase from opposing party. It's certain that the maturation of control valves is closely linked to the industrial practice. The manufacturing and sales have gained rapid growth, and it's predicted it will keep more than 15% growth within the next few decades. The functioning of the diversified marketing and advertising strategy would be a good pick.

In 1925 a company named Adi Dassler now referred to as Adidas produced a selection of shoes with hand-forged spikes. The automotive industry has ever been a venue for the usage of ceramics. Examine the profile of the students that are selected in automation industries and attempt to be aware of their training centers so that you are able to join there and have a scope for career development. If you believe it like a whole valves world just in industry and household, you're incorrect. Maybe it'll be helpful in your upcoming life. As the entire society keeps a fast pace, it is essential to grasp the advanced technologies and employ them into practice. Otherwise, the entire industry, even the entire society wouldn't progress.

The website and size of the incision are just one of the things that have improved greatly over time, and the debut of saline implants means that in some instances the scars are bare, if at all visible. The majority of the info double block and bleed about the business is marketing hype and unsupported statements. It is crucial to note, however, that the info contained here still can't be deemed as an exhaustive collection of all eventualities nor as any type of formal or informal expert advice. Detailed information concerning the important parts of the current market and their growth prospects are offered in the report. There's even a comprehensive Soldier's Medal list so you may see who has one.

In the long run, it is all dependent on the application that calls for the pressure vessel. Thus, the application of gears is diverse, and we can't offer a particular list. There's no app to evaluate.