Q:Calculation formula of ball valve flow

The sectional area of diameter of DN15, DN25 and DN50 is respectively:DN15:15*3.14/4=176.625 mm, 0.0177 square decimeter.DN25:25*3.14/4=490.625 mm, 0.0491 square decimeter.DN50:50*3.14/4=1962.5 mm, 0.1963 square decimeter.A pipe flow rate of V=4 M / s V=40 decimeter / s, and the 1 liter =1 cubic meter, the pipe flow respectively (cross-sectional area multiplied by the velocity):DN15 pipe: flow Q=0.0177*40=0.708 L / sec,It's 2.55 cubic meters per hour.DN25 pipe: flow Q=0.0491*40=1.964 L / sec,It's 7.07 cubic meters per hour.DN50 pipe: flow Q=0.1963*40=7.852 L / sec,It's 28.27 cubic meters per hour.Note: a flow rate must be given to calculate the flow rate, which is calculated in accordance with 4 meters per second. Reference: http://zhidao.baidu /question/77687541.html answer: good night dream | six | 2010-5-24 22:46It's 600 cubic meters / hour!Flow Q=600 m3 / h = 0.167m^3/sThe flow rate is V=4Q/ (3.1416D^2) = 4*0.167/ (3.1416*0.090^2) = 26.25 m/s, and the flow velocity is very large!It could be 600 cubic meters per day:Flow rate Q=600 m3 / day = 0.00694 m^3/sFlow rate V=4Q/ (3.1416D^2) = 4*0.00694/ (3.1416*0.090^2) = 1.09 m/s flow rate is normal.

Q:What do you mean by 266 in the 266 brass ball valve?

so as to produce self number manufacturers and buyers recognition. 266 should be a category of the Le ball valve,. We do hydraulic valve production and maintenance, this problem is not corresponding, I do not know such a reasonable answer?.

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

Ball valves belong to a large class of valves, valves include gate valve, butterfly valve, check valve, globe valve, ball valve, trap valve, safety valve, etc. all valves

Q:What's the difference between T ball valve and L ball valve?

This is the code for the three way ball valve and the three way plug valve flow passage. The L shape can only connect the two channels perpendicular to each other, and the T shape allows the three channels to communicate with each other or to connect two of them.

Q:What does W represent in copper ball valve Q11W-16T?

Valve sealing materials are all valves of the body material, sealing surface material code with "W" said

Q:One stainless steel ball, two pieces, three pieces of difference, use

A piece of ball valve, that is, the principle of Canton style ball valve is to rely on rotary valve to make the valve open or blocked. Valve switch light, small size, can be made large caliber, reliable sealing, simple structure, easy maintenance, sealing surface and spherical often in the closed state, the media can not easily be eroded, widely used in various industries.

Q:What do you mean by ball valves dn20pn1.6rf?

DN20 caliber is 20mmPN is the pressure grade, usually PN16, 1.6MPa classRF convex flange connectionYour side should be similar to the Q41F-16 model of this type of ball valve

Q:Our factory has part of the ball valve in the direction of movement and normal ball valve is the opposite direction: anti clockwise for the turn off, clockwise. Excuse me, what's the reason for this?Excuse me, is this because the valve body installs the reason of the contrary or the reason, the ball valve is thus designed?Are there any positive and negative points when the ball valve is installed?

Ball valve is 90 degrees switch, you may put the handle of the wrong position, change 90 degrees, try it

Q:What's the difference between air valves, butterfly valves and ball valves?

The air valve is an important component of the compressor cylinder, which is responsible for the inhalation and discharge of the gas. The traditional air valve is composed of valve seat, valve plate, spring, lift limiter, bolt and so on.Also known as butterfly valve, control valve has a simple structure, can be used for the work of low pressure pipeline medium valve butterfly valve switch control is closed parts (disc or disc) is a disk, around the valve axis to achieve the opening and closing a valve,Butterfly valve can be used to control air, water, steam, a variety of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid flow.

Q:Replacement method of PPR hot melt ball valve

2, if the valve is directly welded on the pipeline, you need to stop the operation of pipeline, and cutting, the need to replace the valve flange or screw type ball valve, ball valve flange need two "steel plastic adapter" heat welding with the original pipe, the flange type ball valve can be installed; the screw type two single head, a head and pipe welding / bonding, joint head and ball valve with wire of threaded connection.