A: Firstly let us know your requirements or application.
Secondly We quote according to your requirements or our suggestions.
Thirdly customer confirms the samples and places deposit for formal order.
Fourthly We arrange the production.
A: We usually ship by sea. It usually takes 30 days to arrive. Airline shipping also optional.
Classification of valve pressure levels
Valve classification by pressure:
Vacuum valve—a valve with a working pressure below standard atmospheric pressure.
Low pressure valve—a valve with a nominal pressure PN less than 1.6MPa.
Medium pressure valve—A valve with a nominal pressure of PN 2.5 ~ 6.4MPa.
High pressure valve—a valve with a nominal pressure of PN10.0 ~ 80.0MPa.
Ultra-high pressure valve-a valve with a nominal pressure PN greater than 100MPa.
Pressure level Class and nominal pressure comparison table
The valve is a control component in the fluid delivery system, and has functions such as cut-off, regulation, diversion, prevention of back flow, voltage stabilization, shunting, or pressure relief.
Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oils, liquid metals and radioactive media.
Valves are also divided into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, dual-phase steel valves, plastic valves, and non-standard customized valve materials.
What is the differences between the brass ball valve and stainless steel ball valve ?
1. Different applicable substances
Stainless steel ball valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, muds, oils, liquid metals and radioactive media; copper ball valves are suitable for general working media such as water, solvents, acids and natural gas And, it is also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene.
2.Different media temperatures
In terms of medium temperature, under the same pressure environment conditions, the medium temperature range of copper ball valve is higher than that of stainless steel ball valve. If the medium temperature exceeds 80 ℃, copper ball valve must be used, but if it does not exceed 80 ℃, stainless steel ball valve can.
3.Different corrosion resistance
Copper ball valve has excellent corrosion resistance, switch operation is smooth and labor-saving, and durable. Stainless steel does not cause corrosion, pitting, rust or wear, and is resistant to high temperatures.
4. The working principle is different.
Copper ball valve: The ball valve is mainly used to cut off or connect the medium in the pipeline, and it can also be used for the regulation and control of the fluid. The hard-sealed V-type ball valve has a V-shaped core between the V-shaped core and the metal seat of the hard alloy Very strong shearing force, especially suitable for media containing fibers and small solid particles.
Stainless steel ball valve: The working principle of the ball valve is to open or close the valve by rotating the spool. The ball valve switch is lightweight, small in size, can be made into a large caliber, reliable sealing, simple structure, easy maintenance, the sealing surface and the spherical surface are often closed, and it is not easy to be eroded by the medium.
5. Different materials.
Copper ball valve: The material used is mainly composed of copper.
Stainless steel ball valve: The material used is mainly composed of stainless steel.
6, the price is different
Copper ball valve: costly materials are more expensive.
Stainless steel ball valve: cheaper material than copper ball valve.
Differences Between Silica sol investment casting and water glass investment castings
Silica sol and water glass are two kinds of different processes of investment castings. The cost of water glass is lower but it mainly suits for most carbon steel material products,and for the ones which is simple structure. Because if structure is complicated if by water glass then need too much later machine handle, that way increase cost instead.
Different adhesives are used, one is water glass and the other is silica sol. The shell mold is not the same for drying and hardening. Water glass uses a hardening agent such as ammonium chloride, while the silica sol shell mold is dried and hardened in a constant temperature and humidity space.
In addition to the surface smoothness and accuracy, the silica sol molding process is higher than water glass.
How many sets molds does it need for manufacturing one model stainless steel castings?
Normally one set is enough, according to dimension of castings, the artificial wax casting machine can make 1 or 2 or 4 pieces wax castings at one time. The automatic wax casting machine can come out 8-9 pieces wax castings at one time, it is faster, meanwhile its cost is a little higher.
Normally one wax casting machine make one products.
In our location,manufacturer of stainless steel ball valve are mainly located in Cang County or Haixing County of Cangzhou City, Hebei Province, China。
If want to buy stainless steel ball valve lower, customers would better buy it from China markets, and from Manufacturing factory.There are many manufacturers of stainless steel valves. They are cheap to go to Wenzhou city to buy, and the quality is good to buy in Jiangsu and Hebei province.
The premise is to see what kind of occasions you use, materials, seals, leak levels, etc. should be considered comprehensively, according to the use of the right valve.