China Made Fittings Manufacturing And UL Stainless Steel Threaded 2" Water Ball Valve

Ball valve. 

Is evolved from the plug valve, its opening and closing member is a ball, the use of the ball around the stem axis rotation 90 ° to achieve the purpose of opening and closing. Ball valve in the pipeline is mainly used to cut off, distribution and change the direction of media flow, designed to V-shaped opening of the ball valve also has a good flow regulation function.

 

What Valves Are Used for Drainage Pipes?

China Made Fittings Manufacturing And UL Stainless Steel Threaded 2" Water Ball Valve

 

Benefits.

● Have the lowest flow resistance (almost 0). 

● can be reliably applied to corrosive media and low boiling point liquids because they do not clog during operation (in the absence of lubricant). 

● Complete sealing over a wide range of pressures and temperatures is possible. 

● Fast opening and closing is possible, with opening and closing times of only 0.05 to 0.1s for some structures, ensuring that they can be used in test bench automation systems. When opening and closing the valve quickly, the operation is vibration-free. 

● The spherical closure can be automatically positioned at the demarcation position. 

● reliable sealing on both sides of the working medium. 

● The sealing surfaces of the ball and seat are isolated from the medium in full opening and closing, so the medium passing through the valve at high speed will not scour the sealing surfaces. 

● Compact structure and light weight, which can be considered as the most reasonable valve structure for low-temperature media system. 

● The valve body is symmetrical, especially the welded body structure, which can well withstand the stress from the pipeline 

● Closing member can withstand the high pressure difference when closed.

● Ball valves with fully welded bodies can be buried directly into the ground, so that the valve internals are not leached, and the longest service life can be up to 30 years, which is the most ideal valve for oil and gas pipelines.

 

Disadvantages. 

● As the most important seat sealing material of ball valve is PTFE, it is inert to almost all chemicals and has comprehensive features such as low friction coefficient, stable performance, not easy to age, wide temperature range and excellent sealing performance. However, the physical properties of PTFE, including high coefficient of expansion, sensitivity to cold flow and poor thermal conductivity, require that the design of the valve seat seal be based on these properties. As a result, seal reliability is compromised when the seal material hardens. In addition, PTFE has a low-temperature rating and can only be used at temperatures below 180°C. Above this temperature, the seal material will be damaged. Above this temperature, the seal material will be damaged. Above this temperature, the seal material will deteriorate. And considering the long-term use, the 

● Regulatory performance is worse than the globe valve, especially pneumatic valves (or electric valves).

 

Globe valve.

Globe valve is the closing member (valve flap) along the centerline of the valve seat to move the valve. According to this form of movement of the valve valve, the change in seat opening is proportional to the valve stroke. Because of the relatively short opening and closing stroke of the stem of this type of valve and its very reliable globe function, and because the change in seat opening is proportional to the stroke of the valve flap, it is very suitable for the regulation of flow. Therefore, this type of valve is ideal for cut-off or regulation as well as throttling.

 

What Valves Are Used for Drainage Pipes?

Forged steel A105 Globe valve socket flange end

 

Benefits. 

● During the opening and closing process, the valve is wear-resistant because the friction between the sealing surface of the valve flap and the valve body is smaller than that of the gate valve. ②The opening height is generally only 1/4 of the seat channel, so it is much smaller than the gate valve. 

● There is usually only one sealing surface on the valve body and valve flap, so the manufacturing process is better and easy to maintain. 

● Since its packing is usually a mixture of asbestos and graphite, it has a high temperature resistance rating. Generally steam valves are used as globe valves.

 

Disadvantages. 

● The minimum flow resistance of globe valves is also higher than most other types of valves because of the change in the direction of media flow through the valve. 

● Due to the longer stroke, the opening speed is slower than the ball valve.

 

Check valve. 

Also known as backflow valve, check valve, back pressure valve, check valve. These valves are automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, and are automatic valves. Check valves are used in piping systems whose main function is to prevent the backflow of media, to prevent pumps and drive motors from reversing, and the release of container media. Check valves can also be used to provide make-up for auxiliary systems, where the pressure may rise above the system pressure. They can be primarily classified as rotary (rotating by the center of gravity) and lift (moving along the axis).

 

What Valves Are Used for Drainage Pipes?

GGG50 Ductile Iron Rubber Flap Flange Check valve

 

"What are butterfly valves used for?"

"Butterfly valves are generally used for various water fluids, such as domestic water, fire water, process water, circulating water, chilled water, sewage, etc.

Some powder materials can also be used with butterfly valves.

Butterfly valves cannot be used to regulate flow. It can be used to open/close the valve automatically."

 

What Valves Are Used for Drainage Pipes?

High Quality KITZ Aluminum Body Wafer Type Butterfly Valve

 

"In the official road with large pipe diameter, butterfly valve is usually used to control the flow. For example, DN1000 pipeline, if you use the gate valve or globe valve, how big the valve has to be. But small-diameter pipes are rare." Used to regulate the flow of butterfly valves, one is not well regulated, and the other is poor sealing. Small-diameter butterfly valves are generally used in water pipelines, such as fire water, circulating water, etc., can also be used in places "where sealing requirements are not high, not often switch. Of course, the cost of using butterfly valves on large-diameter pipelines is relatively low."

"The two biggest features of butterfly valves are: large bore and low pressure differential.

Butterfly valve compared with other structure of the valve, the same caliber weight to light, simple structure, small volume, the larger the caliber the more obvious this feature; butterfly valve can adapt to the front and rear pressure difference is small, while the higher the technical requirements and manufacturing cost of butterfly valve sealing."

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