Q:What's the meaning of the double ball valve in the double ball valve?

By means of "union", the "live" means that the two ends of the valve are connected by a live joint

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

HF is the abbreviation of two English words: "Hard Face", which means surface hardening. Usually surfacing is made of Tailai alloy (Alloy 6). Other surface hardening methods include hard chromium plating. This method is used more in the ball valve. But hard chromium plating is prone to small cracks, which reduces its corrosion resistance.

Q:What's the difference between a copper ball valve and a stainless steel ball valve?

Copper ball valve corrosion resistance is excellent, switch operation is smooth, labor-saving, durable without leakage.Stainless steel will not cause corrosion, pitting corrosion, corrosion or wear, and high temperature resistance.The average stainless steel is more expensive

Q:Daily maintenance of ball valve

Longer service life and maintenance free period will depend on several factors: normal working conditions, maintaining a consistent temperature / pressure ratio, and reasonable corrosion dataBall valve in the closed state, there is still pressure fluid inside the valve bodyRemove the line pressure before servicing and leave the valve in the open positionDisconnect the power or air supply before servicingBefore the maintenance, remove the actuating mechanism from the bracketMust be found on the ball valve, the downstream pipeline has been removable pressure, in order to disassemble, disassemble operationIt is important to be careful not to damage the sealing surfaces of the parts, especially non-metallic parts, to remove the O rings. Use special tools when taking apart and re assemblingWhen assembling, the bolts on the flange must be symmetrical and tightened gradually and evenlyThe cleaning agent should be compatible with rubber, plastic, metal parts and working medium (such as gas) in the ball valve. When the working medium is gas, the metal parts can be cleaned by using gasoline (GB484-89). Non metallic parts are cleaned with pure water or alcoholThe non-metallic parts should be removed from the cleaning agent immediately after cleaning and should not be soaked for a long timeNeed to be cleaned by washing the wall after volatile cleaning agent (cleaning agent can not dip silk rub) for assembly, but not for a long time on hold, otherwise it will rust, dust pollution

Q:What are the differences and advantages between O ball valve and V ball valve?

2 、 the switch is quick and convenientThe ball just rotated 90 degree is completed fully on or off, so it can achieve rapid opening and closing.3, good sealing performanceMost of the valve seat by four poly ethylene (PTFE) elastic materials, commonly known as soft sealing valve. Soft sealing valve has good sealing performance, roughness and machining precision and sealing surface of the valve is not very high.4, long lifeAs a result of polytetrafluoroethylene (PTFE or F4) has good self lubrication, and friction coefficient of the ball is small. Due to improved processing technology to reduce the ball roughness, thereby greatly improving the service life of the ball valve

Q:Why is there a water or oil in the new ball valve?

When the product goes out of the factory, we should do the closed water pressure test. There are two ways to check the spot and follow the pieces.

Q:What does "DN PN" mean? DN25 PN18 stands for what is the thickness? With the usual said 4 in charge of what's the relationship?

PN nominal pressure.Definition：Relating to the mechanical and dimensional characteristics of the components of the piping system and the identification of letters and combinations of numbers for reference. It consists of letters PN and followed by dimensionless numbers.Note 1: numbers followed by letters "PN" do not represent measurements and are not used for purposes of calculation unless otherwise specified in the relevant standards.Note 2: is not associated with the relevant pipe component standards, but the term "PN" does not make sense.Note the 3: piping element allows the pressure to depend on the PN value of the element, the material and design, and allows the operating temperature, etc., to allow the pressure to be given in the corresponding standard pressure temperature class table.Note 4: all pipe elements with the same PN and DN values shall have the same mating dimensions as their flanges.The latest definition of PN comes from standard GB/T 1048-2005, the definition and selection of pipe component PN (nominal pressure), and is referenced in the standard of pipe fittings and tubing. GB/T 1048-2005 7268:1996 Pipe components - modified ISO/CD Definition of nominal pressure, a "note increase than the original standard: allow numerical" choose other PN when necessary, namely in the PN series, you can use other numerical PN.

Q:What does stainless steel ball valve stand for Q41F1-16R7-P?

Q41F-16R stainless steel flanged ball valveQ valve Code: ball valve;Drive mode: manual, no code;4 connection: flange connection;1 structure form: floating through type;F sealing material: fluoroplastic;16 valve original pressure: 1.6Mpa 16 kgR body material: stainless steel 316Ball valve model preparation methods and instructions:Ball valve additional code: V means that the spool with V structure, D means low temperature, B means insulation, P stands for eccentric structure, U and S and DY, more said upload type;Ball valve Name: Q means ball valve;Ball valve drive Code: 2, said electro hydraulic, 3, said the turbine, 6 pneumatic, and 7 that liquid, and 9 that electric, manual no code;Connection mode code: 1 for internal thread, 4 for flange type, 6 for welding, and 7 for clamp type;

Q:For our valve beginners, how intuitive decision is floating ball valve or fixed ball valve?

Floating ball valves and fixed ball valves can be located in the lower stem position, if there is a lower stem is fixed ball valve

Q:What is the difference between ball valve and plug valve?

2., simple structure, small size, light weight.3. close and reliable. The utility model has two sealing surfaces, and the sealing surface material of the ball valve is widely used in various kinds of plastics, and the sealing property is good, and the sealing can be realized completely. It is also widely used in vacuum system.4 easy operation, open and close rapidly, from fully open to fully closed as long as 90 degree rotation, facilitate remote control.5., maintenance is convenient, ball valve structure is simple, the sealing ring is generally active, disassembly and replacement are more convenient.6. in full open or full closed, the ball and valve seat sealing surface and dielectric isolation, the media through, it will not cause erosion of the valve sealing surface.7., a wide range of applications, from small diameter to a few millimeters, large to several meters, from high vacuum, high pressure can be applied.8., because the ball valve in the opening and closing process of wiping, so it can be used in suspension with solid particles in the medium. Therefore, the landlord can choose the right valve according to their own conditions, and I hope to help you.