In addition, special ball valves are also explained in this chapter, such as three- or three-port ball valves. Valves are designed as control valves and can modulate current more accurately than other types of valves. Balloon valves, however, limit the current more than other valves; Ball valves can provide 30% to 40% higher flow rates. Ball valves in dimensions up to 2 inches generally come in one piece, two or three-piece designs.
Logical air valves are applied to pneumatic systems such as electronic stops, steering valves, one-shot valves, etc. Due to this unobstructed flow path, slide valves have considerably less head loss compared to balloon valves. However, the slide valves are not designed to strangle and may not be able to produce the positive balloon valve closure.
The main specifications include port settings, port connections, valve size and materials that make up the valve body, seat, seal, coating and stem packaging. Plugs generally seal the up and down of the valve, while the plates are generally only sealed on the upstream plane. Wedges can take on various design alternatives that reduce or accommodate wear on sealing surfaces. Gate valves are used in wastewater installations, power plants and process installations for locking and insulation services. Magnetic valves are electromechanical devices primarily used in oil and air systems to stop and start the liquid flow remotely.
Needle valves are volume control valves that limit current in small lines. The fluid moving through the valve rotates 90 degrees and flows through a hole that serves as a seat for a conical pointed ecozen rod. The size of the hole changes when the user places the cone in relation to the seat. The difference between needle valves and balloon valves is the precision that needle valves can achieve.
The application of floating ball valves is limited by the amount of pressure the seats can handle. At high fluid pressure, the seats can be deformed by the pressure exerted by the ball, which can affect the valve sealing characteristics at low pressure. In addition, the pair to rotate the stem depends on the force required to counteract the same fluid force that works and seals on the ball. As the name suggests, ball valves are valves that use a ball to control the flow of substances from one opening to another. These valves work by opening, blocking or partially opening the hole to control the gas / liquid flow. Ball valves are the ideal choice for gas use because they can provide a better seal.
The main specifications include valve type, drive type, port connections, valve size, as well as valve body material, seat, seal and lining. They provide a visible and immediate indication of whether a tube is open or closed and is used to isolate parts of a tube to allow maintenance. Ball valves are quarter-round valves with ported spheres that rotate in the tube flow to block or enable flow. Special designs are available that allow a certain amount of flow control.