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A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. If you want to know the specifications and prices of Ball Valve, please contact us!
Orbital valves have a ball that rotates around an eccentric axis, which means that in addition to rotating 90º like all balls, it then moves allowing for better sealing and precise flow control. They are ideal for applications where a high degree of accuracy and flow control is required.
V-pitch ball valves are similar to a conventional ball valve, but with a contoured V-notch segment in the ball instead of a sphere. This notch can be supplied in various degrees (15º, 30º, 60º…). It can be used as a regulating valve and is available in a wide range.
All internal components of a ball valve are contained inside the valve housing or the body. It is made of a hard and rigid metal, thermoplastic, or thermoplastic-lined metal that protects the components of the ball valve. It also allows access to the external control mechanism that rotates the ball.
The ball is a sphere that has a hole in its center. The hole in its center is called the bore. The bore serves as the flow opening of the fluid when the cross-section of the fluid flow path and the bore is coplanar. Otherwise, the flow is throttled. A ball valve may have a solid ball or a hollow ball. A solid ball has a constant opening diameter throughout its structure, which helps the fluid to smoothly flow at a constant velocity. A hollow ball, on the other hand, has a hollow internal structure, and the space inside it allows more fluid to pass through the valve. However, the larger space creates turbulence and high velocities. A hollow ball is more lightweight and cheap compared to a solid ball.
The shaft connects the ball to the control mechanism that rotates the ball. The shaft has seals such as O-rings and packing rings to seal the shaft and the bonnet to avoid leakage of the fluid. The shaft may be manually operated by a lever or a handwheel or operated by an electric, pneumatic, or hydraulic actuation.
Ball valves are one of the easiest types of valves to operate. They are designed so that a simple turn of the handle is all that is required to open or close the valve. This makes them ideal for use in situations where quick and easy operation is required, such as in emergency shut-off situations.
It is important to keep ball valves clean to extend their lifespan. It is recommended to clean them at least once a year, or more frequently if the environment is particularly filled with dust or dirt. Use a soft towel to wipe off oil, dust, or dirt from the casing. Use a wire brush to clear any buildup on the valve stem or other components. Use cleaning agents compatible with the valve materials, such as alcohol- or water-based cleaners for non-metal parts and compressed air or gas-based cleaners for metal components.
Ball valve lubrication is essential to prevent abrasion and ensure smooth operation of the valve parts. Select a lubricant that is suitable for the valve materials and system media, such as water-insoluble, synthetic, or oil-based lubricants. However, it is crucial to avoid solid- or clay-based lubricants as they can accumulate inside the valve cavity.
Check for regular wear and tear by checking the valve's seats, seals, and stem for any signs of corrosion, leaks, or damage. Increase the frequency of inspections for high-pressure and high-cycle applications. Examine the following parameters:
●Replace the worn-out components as needed.
Store the ball valve in a dry, well-ventilated area away from direct sunlight and extreme temperatures. Ideally, the temperature of the storage area should be between 0 degree (32 degree F) and 49 degree (120 degree F). If possible, store the valve in its original packaging or in a protective container to prevent any damage during transport or storage.
Plastic ball valves are cost-effective but not suitable for high-temperature environments and have a shorter lifespan compared to metal valves. Metal valves are recommended for use with pressurized gasses for safety reasons. It is crucial to verify that the valve body and seal materials are compatible with the media flowing through the valve.
●Apply a high-quality pipe thread sealing compound or PTFE thread sealing tape following the manufactures application instructions to ensure a leak free pipe joint seal.
●Valve and piping must be in alignment to prevent cross-threading, the male threaded fitting needs to be aligned with the axis of the tapped hole. Maintaining proper pipe alignment during assembly eliminates unnecessary stress on the valve body. Support the valve and piping in alignment to prevent any unnecessary stresses on the valve body by connecting the pipe. Pipe supports must be capable of keeping the pipe in alignment and bearing the weight of the fittings, valves, pipe and its contents. Warning: Failure to properly support piping will void warranty and could result in structural failure and property damage
●When installing two-piece body ball valves always use two wrenches when making up pipe joints to these valves. Position one wrench on the valve end closest to the pipe joint being tightened and the other wrench onto the pipe to prevent transmitting torque through the valve body joint, between the valve body and tailpiece. This also prevents distortion of the internal parts of the valve. WARNING: Failure to follow this instruction will stress the body joint and may result in the leaking at the body joint. TIP: Brass and bronze alloys are softer metals than steel, always use a smooth-jawed wrench on the valve end and turn the valve onto the pipe. Pipe Wrenches should only be used on pipe and fittings.
Do not over tighten the valve onto the pipe, as it is possible to distort the internal parts of the valve and or cause a stress fracture in the valve body. As a general guideline, after hand-tight engagement, tighten an additional 1-½ to 3 full turns for sizes up to 1", for sizes 1-¼" and larger 1 to 2-½" full turns, you should have between 3-1/2 and 6 threads engaged. Thread engagement outside of this range may indicate either under or over tightening of the joint or out of tolerance threads.
