High Purity Gas Stainless Steel Pneumatic Diaphragm Valve 1/4 Inch High Pressure

Features
▶The maximum working pressure can reach 31mpa
▶Fully wrapped valve seat design, with superior anti expansion and anti pollution ability
▶Nickel cobalt alloy diaphragm has higher durability and corrosion resistance▶The standard roughness is Ra0 twenty-five μ M (grade BA), or electropolishing Ra0 thirteen μ M (EP grade) optional

▶Helium test leakage rate ＜ 1 × 10-9std cm3/s
▶Optional pneumatic actuator
▶The service life of pneumatic valve can reach 100000 times

Cleaning process

▶standard(WK-BA)
All welded joints shall be cleaned according to the company's standard cleaning and packaging specifications.
When ordering, there is no need to add suffix
▶Oxygen cleaning(WK-O2)
Product cleaning and packaging specifications for oxygen environment can be provided. This product meets the
requirements of astmg93c cleanliness. When ordering, please add - O2 after the order number
▶Ultra high purity(WK-EP)
Can provide controlled surface finish, electropolishing Ra0 thirteen μ m. Deionized
water ultrasonic cleaning. To order, add - EP after the order number

Main structural materials Serial number element texture of material 1 Handle aluminium 2 Actuator aluminium 3 Valve stem 304 SS 4 Bonnet S17400 5 Bonnet nut 316 SS 6 Button brass 7 diaphragm (5) Nickel cobalt alloy 8 valve seat PCTFE 9 valve body 316L SS

Dimensions and ordering information
Straight through type
size
Dimensions are in inches (mm) is for reference only

Industries involved

TFT-LCD

The process special gases used in the CVD deposition process of TFT-LCD manufacturing process are silane (S1H4), ammonia (NH3), phosphine (PH3), nitrous oxide (N2O), NF3, etc. In addition, high purity hydrogen and high purity nitrogen and other bulk gases are also involved in the process. Argon is used in the sputtering process, and the sputtered film forming gas is the main material for sputtering. First, it is required that the film-forming gas cannot react with the target, and the most appropriate gas is inert gas. A large amount of special gas will also be used in the etching process, while the electronic special gas is mostly flammable, explosive and highly toxic, so the requirements for gas circuit and technology are very high. Wofei Technology specializes in the design and installation of ultra-high purity special gas transmission system

Special gases are mainly used in film forming and dry etching processes in LCD industry. There are many kinds of LCD, among which TFT-LCD is the most widely used LCD technology due to its fast response time, high imaging quality and gradually lower cost. The manufacturing process of TFT-LCD panel can be divided into three stages: front array, middle cell and rear module assembly. The electronic special gas is mainly used in the film forming and dry etching stages of the front array process. After multiple film forming processes, SiNx non-metallic films and metal films such as grid, source, drain and ITO are respectively deposited on the substrate.

FAQ
1. who are we?
We are based in Guangdong, China, start from 2011,sell to Southeast Asia(20.00%),Africa(20.00%),Eastern Asia(10.00%),Mid East(10.00%),Domestic Market(5.00%),South Asia(5.00%),Northern Europe(5.00%),Central America(5.00%),Western Europe(5.00%),South America(5.00%),Eastern Europe(5.00%),North America(5.00%). There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
pressure regulator,Tube fittings,solenoid valve,Needle valve,check valve

4. why should you buy from us not from other suppliers?
We have a couple of years with professional engineers and dedicated technicians.can provide security products for you

5. what services can we provide?
Accepted Delivery Terms: FOB,CIF,EXW；
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,L/C,Western Union;
Language Spoken:English,Chinese