High Purity Gas Stainless Steel Pneumatic Diaphragm Valve 1/4 inch High Pressure
Product Description
Specification of Pneumatic Diaphragm Valve
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Technical Data
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Port size
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1/4″
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discharge coefficient (Cv)
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0.2
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Maximum working pressure
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Manual
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310 bar (4500 psig)
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Pneumatic
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206 bar (3000 psig)
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Working pressure of pneumatic actuator
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4.2~6.2 bar (60~90 psig)
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working temperature
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PCTFE：-23~65℃（-10~150℉）
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Leakage rate (helium)
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inside
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≤1×10-9 mbar l/s
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external
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≤1×10-9 mbar l/s
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Flow data
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air@ 21℃（70℉） water @ 16℃（60℉）
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Pressure drop of maximum air pressure bar (psig )
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air (lmin)
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water (l/min)
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0.68 (10)
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64
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2.4
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3.4 (50)
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170
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5.4
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6.8 (100)
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300
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7.6
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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
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
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Main structural materials
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Serial number
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element
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texture of material
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1
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Handle
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aluminium
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2
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Actuator
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aluminium
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3
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Valve stem
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304 SS
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4
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Bonnet
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S17400
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5
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Bonnet nut
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316 SS
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6
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Button
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brass
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7
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diaphragm (5)
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Nickel cobalt alloy
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8
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valve seat
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PCTFE
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9
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valve body
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316L SS
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Dimensions and ordering information
Straight through type
size
Dimensions are in inches (mm) is for reference only
size
Dimensions are in inches (mm) is for reference only
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Basic order number
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Port type and size
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sizein.(mm)
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A
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B
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C
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L
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WV4H-6L-TW4-
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1/4″ Tube -W
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0.44 (11.2)
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0.30 (7.6)
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1.12 (28.6)
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1.81 (45.9)
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WV4H-6L-FR4-
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1/4″ FA-MCR
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0.44 (11.2)
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0.86 (21.8)
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1.12 (28.6)
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2.85 (72.3)
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WV4H-6L-MR4-
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1/4″ MA-MCR1/4
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0.44 (11.2)
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0.58 (14.9)
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1.12 (28.6)
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2.85 (72.3)
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WV4H-6L-TF4-
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OD
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0.44 (11.2)
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0.70 (17.9)
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1.12 (28.6)
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2.85 (72.3)
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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.
Q1. What about the lead time?
A:Sample needs 3-5 days, mass production time needs 1-2 weeks for order quantity more than
Q2. Do you have any MOQ limit ?
A: Low MOQ 1 pic.
Q3. How do you ship the goods and how long does it take to arrive?
A: We usually ship by DHL, UPS, FedEx or TNT. It usually takes 5-7 days. Airline and sea shipping also optional.
Q4. How to proceed an order ?
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.
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