Want to choose a product, we need to understand the difference between it and other products and advantages. Which type pneumatic pipe needle valve is usually do flow adjusting function is given priority to, the pneumatic ball valve is as quick to cut off the pneumatic pipe lines. As small valves, pneumatic tube road between them have different characteristics and using effect. Pneumatic pipe stainless steel hydraulic fitting and in the light of the needle valve by valve type, on the basis of the disc changes, at the end of the disc into needle shape, the disc sealing in the valve stem. When the hand wheel rotation valve disc up and down, when clockwise, the valve closed, traffic also will gradually become smaller, until all closed flow to seal.

Needle valve and the other a product, pneumatic pipeline ball valve is cut off, when there is a case of an emergency need to quickly cut off the gas source, using the pneumatic pipeline ball valve. Pneumatic pipeline ball valve disc used to switch a sphere, the valve stem connection between the spheres, when the valve stem with the handle, turning the ball over the valve stem rotate 90 degrees to play the role of and off. 90 degrees clockwise as closed, counterclockwise to open. So on the choice, if it is to do flow control type choice of the needle valve, faster on fast off with large flow requirements can choose this kind of ball valve.

Card casing joint water card sleeve joint stainless steel piston o-ring seal sealing water stop, through the oil pressure or water pressure control input and exit the o-ring seal. By changing the oil (or water) in the direction of the stainless steel tube fitting control of the o-ring seal movement direction, to meet the needs of the operation. O-ring seal with the valve body and applied double o-ring seal between the end cover, and can be reduced by setting the PTFE ring way of o-ring wear.

Every decca set two o-ring seal sleeve joint, upstream side for overhaul sealed and downstream side seal for work. Overhaul sealed a manual locking device, and normal work overhaul sealed in a normally open state, only during overhaul, input, in order to ensure the maintenance of downstream - all sex, should will lock in manually. Work sealed into the ferrule joint closed, exit before the ball movement. For the warranty card set of joint can close quickly in an emergency, the brass pipe joint after reaching full open, work seal is still in the exit status.

Stainless steel pipe is a stainless steel tube inserted into the fitting socket part then along a circle on the edge of a tube made of argon arc welding pipe, is the most reliable connection of all connections. Fitting stainless steel needle valve socket diameter = pipe diameter. According to the welding edges of a pipe can be divided into slope of yanbian, order while no yanbian yanbian and three kinds of pipe fittings, socket welding specification for DN15 - DN100 commonly.

Butt welded
Butt welded stainless steel pipe is the stainless steel pipe and pipe fittings alternately along the seam to do a lap of argon arc welding pipe fittings, generally need to welding and welding.

Fitting socket diameter = pipe diameter.

Butt welding is commonly used in larger specifications of stainless steel welded pipe system.