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:What's the difference between a ball valve and a butterfly valve? Which one has better sealing performance?

(1) the butterfly valve from the valve body, valve seat, valve plate, valve rod, all parts are a significant drain on the outside, one eye can see; the ball valve is composed of a valve body, the valve core (a round ball), valve rod, valve position is in the valve body inside, the naked eye can see only a part, so the seal the performance of the valve than the butterfly valve well;

Q:Please professional help guide: accidental discovery of connection pipe and valve (mark position diagram) can rotate, but there is no problem with the 10 Water Leakage.Please professional help guide: accidental discovery of connection pipe and valve (mark position diagram) can rotate, but there is no Water Leakage problem, while the valve under the same position is fixed and can not rotate, will this situation is normal? Is it possible to leak water in the future?

Abnormal, should be fixed, a long time may leak.

Q:What does the sealing surface of the ball valve stand for HF?

HF= hard solder material in valves Q347HF, -16C, welded with CoCr or NiCr alloy.

Q:What's the diameter of the 4 point ball valve?

4 points is 0.4 inches, 1 inches =25.4 mm.Then the 4 point ball valve diameter is 10.16mm.

Q:How does ball valve indicate?

Start with Q, such as Q41F-16P DN50Q is a ball of the code, second bit 4 is connected, third bit 1 is the structure form, the F fourth is sealing surface material is PTFE, 16 represents the pressure is 16KG, P stainless steel,,Specific refer to valve selection manual,,

Q:Into the tap valve, with globe valve or ball valve?

Just don't buy cheap goods, cheap ball valves use a period of time, gland leakage, spool corrosion must be replaced.

Q:3/4 on the elbow of the water pipe. How about that ball valve?

3/4 inches converted approximately equal to 20mm, that is, DN20, can be equipped with DN20 caliber ball valve, commonly used for brass material

Q:Home PPR pipe ball valve, which is good?

See what you use as a route. The main valve, then use the cut-off valve, because the cut-off valve is high, low, out of the valve. If the toilet or kitchen, often use the valve with the ball valve, because it is not bad, more suitable for regular switching use

Q:What is the nominal pressure 1.6p of a ball valve?

Nominal pressure: reference value relating to the pressure resistance of a piping system. For ease of use, usually the priority of the R10 series is taken. Nominal pressure refers to the pipe in the two temperature (20 degrees Celsius) when the water delivery pressure. If the water temperature is between 25 and -45 degrees, the coefficient of temperature drop should be adjusted to correct the working pressure.