An advantage of trunnion ball design over floating ball is the lower operating torque of the ball. A general rule of thumb is floating ball valves are best for low- to medium-pressure scenarios, and trunnion ball valves are best for high-pressure projects. A free-floating valve is known as a floating type whereas a fixed type valve is known as a trunnion mounted valve. it pivots as the axis of the ball is rotated and presses against the seat Your choice of trunnion vs floating ball valve depends upon your application/design criteria. Providing problem solving and educational information for the flow control, industrial valve, heat exchanger and cooling tower market. The ball type disc can be a free float or fixed in the valve body.

Availability of Floating Ball Size/Pressure Class. Additionally, if you need automatic actuators, trunnion valves work best with automation.

A trunnion mount ball valve can also be advantageous for applications employing valve automation. Trunnion Image – TROUVAY & CAUVIN.

Limited, Pipe Flange Splash Protection (Type SFX-PA), Pipe Flange Splash Protection (Type SFX-PP), Pipe Flange Splash Protection ( Type SFX-TF), Pipe Flange Splash Protection (Type SFX-KEA). DIRECT SHIPMENTSGLOBAL SUPPORT, EXCELLENCE This type of ball valve design is therefore capable of bi-directional shut off. floating ball valve styles having better sealing for low pressure applications because : 08138394 QUICK DELIVERIES, KNOWLEDGE trunnion style valve. LOWEST PRICESFREE FREIGHT

What makes a trunnion style ball valve different are size pipelines, due to its relatively inexpensive cost when compared to a This website and its content is copyright of Specialised Valve Solutions Limited- © Specialised Valve Solutions 2019. An advantage of trunnion ball design over floating ball is the lower operating torque of the ball.

The ball is sandwiched between concave shaped QUALITY SUPPLIERSPROMPT SERVICESATISFACTION FACTORY TRAINEDOTJ EXPERIENCE Obviously this difference becomes important when the pressure class and valve increases.

Your choice of trunnion vs floating ball valve depends upon your This is particularly advantageous when the ball valve is actuated because it reduce the size of the actuator and hence the overall costs of the valve actuation package. and the valve body. IS#1 PRIORITY, ECONOMICS
Have a question about industrial controls, valves, heat exchangers or cooling towers? Types of Ball Valves based on Body Construction. Melton Mowbray The Stem packing prevents leakage via the SPEEDEASY This small lateral movement in fact produces a load on the ball that presses it against the downstream seat. criteria.
style valves also offer operational advantages for large diameter pipelines The name “floating” ball refers to the fact that the ball is suspended in the flowing medium held in position by the compression of the two elastomeric seats against it. As described above, there comes a point where owing to the high value of the loading forces on the ball it becomes no longer possible for the seats to support the ball and an alternative design is required. This is particularly advantageous when the ball valve is actuated because it reduce the size of the actuator and hence the overall costs of the valve actuation package. Covering the markets of Colorado, Utah, Wyoming, New Mexico, Montana, Arizona, Nevada, Idaho, and the western Dakotas.| www.mnteng.com, Providing problem solving and educational information for the flow control, industrial valve, heat exchanger and cooling tower market. Since the ball is not held in place by a tight fitting seal arrangement, operating torque tends to be lower for comparably sized trunnion mount valves, when compared to floating ball valves. CONCENTRIC, DOUBLE & TRIPLE OFFSET BUTTERFLY VALVES, MULTI-PORT (Trunnion, threaded/socket/tri-clamp/flanged). All rights reserved. Give us a call at (303) 232-4100. As might be expected, more stringent performance Double Block and Bleed Valves (Triple Offset Butterfly Type), Double Block and Bleed Valves (Ball Type), Multihole Cage Severe Service Control Valves, Butterfly Shut Off Valves for Industrial Gas Burners and Process Equipment (EN161), Combustion and Exhaust Gas Butterfly Control Valves, Thermoplastic Butterfly Valves for Corrosive Exhaust Gases, Alternative Valves: The English Electric Co. Limited, Alternative Valves: Newton Chambers Eng. they are not relying on system pressure to aid with sealing. and high pressures, namely extended valve seat life.

the seats, which instead of being fixed are spring loaded, thus actively

The trunnion mounted ball design in effect addresses this problem where in effect the shaft, ball, and trunnion act as single assembly that supports the ball instead of the seats and the seats become “floating” in a kind of reversal of the “floating ball” design. valve and trunnion valve involves the operating pressure characteristics, with If the valve body has a fixed shaft on the bottom, it is a trunnion ball valve; if the ball is free to float inside the valve body, then it is considered a floating ball valve. ENGINEERING SUPPORT. Please feel free to browse our scope of supply for ball valves and contact us if you have a requirement: Specialised Valve Solutions Limited "seats", forming a tight seal between the inlet and outlet ports of the ball Trunnion is available for all sizes and for all pressure classes. The trunnion design is more complex, trunnion mounted ball design, but most have a floating ball design. The working principle for trunnion ball valve: In contrast, the trunnion ball is fixed and supported by seat support as well as the upper & lower stem. floating ball valve design is most common, especially for smaller No.

application/design

Ball valves are manufactured in different body arrangements. Company Reg. As the nominal bore size of the ball increases, the weight of the ball also increases, and also the area subjected to the line pressure also increases. 22a Burton Street

Registered in England.

However, trunnion valves are the most versatile, so they will work in most cases.

Have a question about industrial controls, valves, heat exchangers or cooling towers?

Some of the ball valves we offer have a The floating ball valve only has upper stem and the ball can have a slight displacement, so it is called floating ball valve.The trunnion ball valve ball has another stem at the bottom to fixed the position of the ball,so the ball can’t move.

The floating ball valve design is most common, especially for smaller size pipelines, due to its relatively inexpensive cost when compared to a trunnion style valve. requirements often translate into more complex designs where the trunnion The shaft allows for a certain amount of lateral movement of the ball that is generated from the upstream pressure acting against the ball.

Similarly, trunnion mounted ball design is also capable of bi-directional sealing. The floating ball valve and the trunnion ball valve can be easily distinguished in their appearance. Well, I try to explain it in a few words without going to deep into the technical details. These seats are fixed in-place, meaning they do

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Covering the markets of Colorado, Utah, Wyoming, New Mexico, Montana, Arizona, Nevada, Idaho, and the western Dakotas.|, Mountain States Engineering and Industrial Controls Blog, Trunnion Mount Ball Valves For Industrial Pipelines, Pressure Measurement Using Isolation Ring, Trunnion mount ball valves have upper and lower support. DBB Valves: Floating vs. Trunnion Ball Design Lately I was often asked about the difference between a floating and a trunnion ball valve. The shaft is connected to a slot at the top of the ball which allows the ball to be driven travel through a quarter turn (90 degrees).

mounted ball design is advantageous. https://blog.projectmaterials.com/valves/ball-valve-floating-trunnion

opposite the pressurized port.

stem and bonnet interface. Therefore the difference between a floating ball requiring both a top and bottom shaft to properly position the ball.