Want to know more about ensuring safety and long-lasting performance on industrial valves? Fevisa, a leading valve manufacturer had a complete guide on what you are searching for.

1. AN
INSIGHT
INTO VARIOUS
TYPES OF VALVES
WWW.VALVULASFEVIS.COM

3. Valves play an important role in our everyday lives. Wherever fluids move in a pipe, valves are needed to secure
their safe and reliable flow. And this happens in most process industries – and even to make products or materials
that might surprise you. Millions of valves are working day and night in various industries globally.
Valves as opined by a leading Valve Stockist in Dubai, are mechanical or electro-mechanical devices that are
used to control the movement of liquids, gases, powders, etc. through pipes or tubes, or from tanks or other
containers. In most instances, valves rely on some form of mechanical barrier—a plate, a ball, a diaphragm, for
example—that can be inserted and removed from the flow stream of the material passing by. Some valves are
designed as on-off varieties, while others allow very fine control of the passage of media.
Introduction:

4. Valves generally help secure safety in process plants by regulating and controlling
process flows. Sometimes, the stuff that flows is quite hazardous or erosive, so the
valves must be very durable and reliable, even in the most demanding conditions.
Regardless, they need to function steadily and efficiently, no matter what the liquid. As
you can see, valves have a mission-critical role in the productivity and safety of process
plants – from bioproduct mills to gold mines and oil refineries.
Material selection plays an important role in specifying valves to ensure the
compatibility of the wetted parts of the valve with the fluid or powder passing through
it. Sizing is determined by the pipe or tubing diameter, flow rate, and the width between
flanges for pipeline valves being installed as replacements.

6. Main Types of Valves:
• Ball Valves
• Butterfly Valves
• Gate Valves
• Globe Valves

8. Ball Valves are quarter-turn valves incorporating ported spheres that swivel in the pipe stream to either
block, or allow, flow. Special designs are available which enable a degree of flow regulation. Key
specifications as provided by ball valve suppliers include the number of ports, port configuration, port
connections, valve size, and the materials that make up the valve body, its seat, seal, and stem packing.
Ball valves are used practically anywhere a fluid flow must be shut off, from a compressed-air line to a
high-pressure, hydraulic system. Ball valves can provide low head-loss characteristics as the port can
exactly match the pipe diameter. Ball valves also tend to seal better than butterfly valves, but they can be
costlier to purchase and maintain. Typically, they are actuated with a lever which provides a visual
indication of the valve status.
Ball Valves

9. Butterfly Valves are quarter-turn valves which employ centre-mounted circular flaps that swing
into, and out of, the flow stream. Key specifications as provided by butterfly valve supplier include
port connection, valve size, and the materials that make up the valve body, its seat, seal, disc, and
stem packing. Butterfly valves are used in wastewater plants, power plants, and process plants for
shut-off and for regulating and isolating service and are especially popular in very large diameter
pipelines. Generally smaller and cheaper than a ball valve of the same capacity, butterfly valves can
be difficult to operate against high pressure and flow. They are also more leak-prone than ball
valves and subject to higher head losses.
Butterfly Valves

10. Gate Valves are used mainly for blocking fluid flow and are less likely to be employed for
flow regulation. A gate valves supplier is of the opinion that these valves use a plate-like
barrier that can be lowered into the flow stream to stop the flow. Its operation is similar to
that of a globe valve except the gate provides less flow restriction than with a globe-valve
plug when the valve is in the fully opened position.
Gate Valves

11. Most Globe Valve Suppliers, commonly have named these valves for their spherically
shaped valve bodies that were at one time common, are also named for their use of a globe-
shaped disc that constricts flow by closing against a restricting orifice. The disc is opened
and closed with a handwheel on manually operated valves and with an actuator and sliding
shaft on automatic valves.
Globe Valves

12. Valves are often deemed as being bubble-tight, a description for valves which will not
allow any liquid passage upon closure. Certain designs are more apt to be bubble tight
than others, particularly those valves that are intended for on-off service versus those
that are used mainly for regulating flow.
Conclusion

13. This writeup provides a basic understanding of valves and their selection and uses in
various environments. Fevisa, a leading Valve Stockist in the upcoming market, has
superior functional capability with global standards in supplying. Moreover, our Europe
origin valves are designed to meet various industrial standards in addition to customer
requirements. Our Fevisa team of experts has always been ready to help you in the
selection of valves.