Fixed and floating ball valve is the biggest difference is needle valve manufacturer that the ball in the middle of the fixation, fixation of seal damage, stationary to enhance the service life of the ball valve, fixed ball valve is higher than the service life of floating ball valve, because the floating ball valve floating ball is inside the cavity of the rotation, will cause the sealing floating sinking, ball valve at turning points, there is no strong point, will have damage on both sides of the seal. After the ball as long as you use, can create some different degree of loss of pressure, when the ball has a strong point, will not cause the loss of pressure or the face of the pressure loss of the received will be very small, so the life of the fixed ball valve is higher than the floating type, some relatively high switch frequency occasions use fixed ball valve will be better.
General occasions if there is air (air source pressure more than 3 kg) suggested that as far as possible choose pneumatic, electric valve switch frequency is lower, the continuous open will burn motor, motor overheating will automatically stop, electric valve control time is the biggest drawback is slow, so if the switch frequency is higher selection of electric valve is not recommended.
Solenoid valve works only connect two wires, electricity and then open, power is shut up, electric valve is the principle of the motor and reversing, as is often the case, open a need charged with electricity, electricity will need in once off, relatively electric valve, control will be a little bit more complicated, and the electromagnetic valve of medium requirements must be clean.
Also look at the pipe material selection, first of all, the first pipe is carbon steel or stainless steel, stainless steel is also classification, is 304 and 301, the valve is 304, and 316 more commonly, or what is should seeing piping material, pipe is commonly 304 the choose 304 ball valve is no problem, if it is 316 pipe that the choice of the 316 - ball or solenoid valve, have the corrosion depends on corrosive, depends on the chemical elements belong to those kinds of medium is water also look at 12 needle valve the pipeline pressure is much.
And flange to the clamp no absolute should choose that kind of, is usually to recommend to the customer to choose, to the clamp and the flange is the same to the clamp are need to flange connection, from the consideration on the cost of more affordable to the clamp, the use of the flange and the use of clip the role.
All of the products, there is no way to increase the life of a life, if a product life to can choose to replac the seal, if it is chosen by the butterfly valve is not fully open its life is the most economical way to butterfly valve, the cost would be lower, relative linear ball valve and butterfly valve is the same, all is the percentage of linear, such as traffic opening the difference is not very big, long-term generally choose the butterfly valve is better, not fully open normal butterfly valve life of large diameter 1-20000 times, not too high.
The biggest problem is not fully open medium scour, if a clean medium is water or gas that can choose soft sealing butterfly valve, if have cost permitting silt these occasions suggest choose hard seal, soft seal and hard seal butterfly valve can be divided into, the service life of the large diameter hard seal of some, generally is about 30000 times, soft seal is in commonly 10000 times or so, if you want to extend your life is only one way to replac the seal.
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