Q:Ball valve specifications 1/2 inches corresponding to DN?

1/2 is DN15, 3/4 is DN20, and 1 is DN25And so on

Q:Manual ball valve type: Class400, 20 ', what does that mean, industrial knowledge?

The pressure rating of the valve type and American StandardIt's a 20 inch, 400 pound valve20 inch =DN500 (nominal diameter)400 pounds equivalent to nominal pressure PN64 Mpa

Q:Is the ball valve switch in front of the water meter or after the water meter?

the owners of their own decoration or repair, in front of the water meter is generally C type locking valve or valve, if less water, property control, no special key you open

Q:How many kinds of ball valves are there?

Ball valves (ball valve in the field of marine engineering and ships should be cut-off valve), standard GB/T21465-2008 "valve terminology" is defined as: "open and close parts (spheres) driven by the stem, and around the axis of the ball valve to rotate the valve movement.".

Q:Are ball valves and float valves a thing? If not, what valves belong to the valve, screw valve, threaded flange valve, welding flange valve or flange valve?.Online, etc.. Thank you

Ball valve and float valve is a kind of valve, the ball valve is a valve inside the ball, it is called the ball valve

Q:Valve and ball valve is the same thing? Don't know don't speak

Ball valve is only a kind of valve, is very common, the middle of the spool is spherical.Many types of valves, in addition to ball valves, there are common gate valve, stop valve, butterfly valve, check valve and so on.

Q:Is the two piece ball valve in the direction of the pressure pipe?

A piece of ball valve, the current market pressure of most products below 6.4MPA, two piece ball valve about 12.8MPA products are also common, there are 20MPA, three pieces of ball valves are mostly below 6.4MPA. Know the characteristics and shortcomings of these three kinds of ball valves, you can completely choose according to your own needs.

Q:What are the types of vacuum ball valves?

The utility model can be used in the high vacuum condition and can be used under the low voltage system, and the advantages of positive and negative pressure are same

Q:What's English for ball valves?

Check valve/ball vavle/globe valve (ball valve), there are three kinds of translation, see which you preferFast stainless steel ball valve, ball valve is evolved from the plug valve. It has the same rotation, 90 degrees lifting action, and the difference is that the cock body is a sphere and has a circular through hole or passage through its axis. The ratio of the sphere to the channel opening should be this, i.e., when the ball rotates 90 degrees, the spherical surface should be fully presented at the inlet and outlet, thus truncating the flow. The ball valve only needs to rotate 90 degrees of operation and very small turning moment can close tight. Full equality of the valve cavity for the media to provide a small resistance, through the flow channel. It is generally believed that the ball valve is suitable for direct opening and closing, but the development of the ball valve has been designed to make it throttling and controlling the flow.

Q:What are the structural shapes of the eccentric hemisphere valve, what are their respective characteristics?

Two, characteristicsThe eccentric hemisphere valve is mounted type structure. The valve installed on the pipeline can be directly checked and maintained, which can effectively reduce the device parking and reduce the cost.Eccentric semi spherical valve is single valve seat design. The utility model eliminates the problem that the medium of the valve in the valve is influenced by the abnormal voltage increase.Low torque design. Special structural design of the valve stem, with only a small hand, the valve can easily open and close.No friction at opening and closing. This function completely solves the problem that the traditional [wiki] valve [/wiki] affects the sealing because of the friction between the sealing surfaces.Wedge sealing structure. Valve is provided by the mechanical force of the valve stem, the ball wedge to the seat and seal, so that the valve sealing is not affected by changes in pipe pressure, in a variety of conditions, sealing performance has a reliable guarantee.The self-cleaning structure eccentric semi ball valve sealing surface. When the ball roll off the seat when the fluid in the pipeline along the sealing surface of the sphere into 360 degrees evenly through, not only eliminates the high speed fluid on the seat of local scour, also washed away the sediment on the sealing face, achieve the purpose of cleaning.