Pneumatic PFA Diaphragm Valve with Bevel Seat Ends, 3/4 inch
The CYLEX pneumatically actuated PFA diaphragm valve is designed specifically for handling ultra-high-purity, highly corrosive media. The valve body is constructed of high-quality PFA material, providing exceptional chemical inertness and ensuring zero fluid contamination. Pneumatic actuation ensures fast, reliable automated control, while standard cone (flare) ports enable leak-free piping connections. It is an ideal choice for the semiconductor, biopharmaceutical, and fine chemical industries.
Model: D-F-ADV4-NC-G112-01A4-FA
Body Size: 46mm
Actuation: Normally Closed
Connector: Flare
Port Size: 3/4″
Actuator Options: Open/Close Only
Control Port Direction: Same as flow direction
Mounting Method: Threaded Flange
Body Material: Ultra-pure PFA
CYLEX supports small-batch customization, offers discounts for large quantities, fast delivery, and provides guaranteed after-sales service.
Get a quote or inquire for more information about custom processing of PFA Valves .
Processing Cycle:
7-14 days
Material:
Diaphragm: PTFE
Valve body: PFA
Inquiry NowPFA Valve Catalog (PDF)
Categories :
Valve Body Material: PFA
PFA (perfluoroalkoxyalkane): This can be considered an upgraded version of Teflon (PTFE). It possesses all the excellent properties of PTFE but with the added benefit of thermoplasticity, allowing for the manufacture of more complex and consistent components through injection molding.
Key Advantages:
● Extremely chemically inert: Resistant to nearly all strong acids, bases, strong oxidizers, and organic solvents, it is ideal for handling high-purity chemicals and corrosive media.
● Extremely high purity: PFA does not release any ions and will not contaminate fluids, making it ideal for industries requiring extremely high cleanliness, such as semiconductors, photovoltaics, biopharmaceuticals, and food and beverages.
● Excellent thermal stability: Continuous operating temperatures typically extend from -196°C to +260°C.
● Extremely low surface adhesion: Resists fluid residue, making cleaning easier and preventing cross-contamination.
Actuation: Pneumatic
Operating Principle: The valve is opened and closed by external compressed air. A pneumatic actuator converts air pressure into linear motion, pushing the valve stem, which in turn drives the diaphragm up and down.
Key Advantages:
● Fast opening and closing: Suitable for processes requiring frequent on/off cycles or automated control.
● Automation/remote control capability: Easy integration with a PLC (Programmable Logic Controller) or DCS (Distributed Control System) for precise process automation.
● Intrinsically safe: No risk of sparking, suitable for use in explosion-proof areas.
● High force: Provides stable shutoff force, ensuring a reliable seal.
Structure: Diaphragm valve
Operating Principle: A PTFE diaphragm within the valve body serves as the closing element. When the pneumatic actuator pushes the valve stem downward, the diaphragm deforms and presses against the weir (or valve seat) at the bottom of the valve body, achieving a seal and closing. When lifted, the diaphragm returns to its original shape, opening the valve.
Key Advantages:
● No-dead-angle design: The flow path is smooth, and the media only contacts the valve body and diaphragm. There is no internal cavity where fluid can accumulate, making it ideal for applications with high viscosity, suspended particles, or sterile conditions.
● Zero leakage: The diaphragm completely isolates the valve cavity from the driving components (stem and actuator). The processed media never comes into contact with the external environment, eliminating the possibility of stem leakage.
● Simple maintenance: The diaphragm is the only wearing part, making replacement easy without removing the valve from the pipeline.
Connection Type: Flared
Flared: This method expands the pipe end into a flared shape, which fits into a fitting body with the same angle and is locked with a nut to achieve a seal.
Key Advantages:
● Reliable seal: Metal-to-metal linear contact seal provides excellent pressure and vibration resistance.
● Reusable: Compared to compression fittings, flared fittings can be reassembled and disassembled multiple times while maintaining a good seal.
● No packing: The seal does not rely on thread sealant or PTFE tape, resulting in a cleaner seal.
Diameter Size: 3/4″
The port size is approximately 3/4 inch (approximately 19.05 mm), which determines the flow capacity. The valve should be selected based on the system’s flow and pressure drop requirements.
Technical Specifications (D-F-ADV4-NC-G112-01A4-FA):
| Use fluid | Pure water, chemical liquid | ||||||||||
| Fluid temperature | 5~120 °C (Note 1, Note 2) | ||||||||||
| Pressure resistance | 1.0 Mpa | ||||||||||
| Use pressure | A→B: 0~0.5 Mpa B→A: 0~0.5 Mpa | ||||||||||
| Valve seat leakage | 0 cm³/min (Water pressure) | ||||||||||
| Backpressure | 0~0.5Mpa | ||||||||||
| Ambient temperature | 0～60 ℃（With sensor 0〜50 ℃） | ||||||||||
| Frequency | Less than 20 times/minute | ||||||||||
| Diameter | Φ16 | ||||||||||
| Material | Diaphragm: PTFE Valve body: PFA | ||||||||||
Note 1: Please use hydrofluoric acid or chemical liquids containing hydrofluoric acid within the range of 5 to 80°C. | |||||||||||
Application Scenarios
The 3/4″ Pneumatic PFA Diaphragm Valve with Bevel Seat Ends is designed for demanding applications:
● Core Advantages: Ultra-high purity, zero contamination, strong corrosion resistance, leak-free operation, and automated control.
Typical Application Industries:
● Semiconductor Manufacturing: Delivery of ultrapure water, CMP slurry, and high-purity chemicals (such as hydrofluoric acid, sulfuric acid, and ammonia).
● Photovoltaic Industry: Corrosive liquids used in silicon material processing.
● Biopharmaceuticals: Culture media, buffers, water for injection (WFI), and CIP/SIP (clean-in-place/sterilize-in-place) systems.
● Fine Chemicals: Delivery of high-purity, highly corrosive chemicals.
Why Choose CYLEX?
● Quality Assurance: Every valve undergoes rigorous factory testing, including air tightness testing and visual inspection.
● Technical Support: Our team of engineers provides expert product selection and technical support.
● Fast Delivery: Optimized inventory management ensures fast delivery of critical products.
● Global Standards: Our products are designed and manufactured in accordance with international standards and guidelines, including ASME BPE and FDA.
Need a Quote or Custom Size? ✉️ Contact CYLEX Today!
Test Type Test Conditions Acceptance Criteria Test Results Burst pressure Hydraulic oil pressure builds up until a leak is detected The burst pressure must be greater than 2 times the rated pressure PASS Pressure envelope 414kPa (60psig)@180°C and 310kPa (45psig)@200°C thermal oil 1 million cycles at 1.5 times rated pressure without external leakage PASS No external leakage Drive cycle test 276kPa (40psig)@180°C and 207kPa (30psig)@200°C thermal oil cycle 500,000 times Functional performance up to 500K cycles without leakage in normally open valves PASS No external or port-to-port leakage <0.050 cc H₂O/hr 276 kPa (40 psig)@180°C and 207 kPa (30 psig)@200°C thermal oil 1 million cycles Functional performance up to 1 million cycles without leakage in normally closed valves PASS No external or port-to-port leakage <0.050 cc H₂O/hr Test Type Test Conditions Acceptance Criteria External medium leakage 552kPa (80psig) CDA Through 1/32″ ID tubing immersed in DI water, no bubbles per minute Port to Port Valve Testing 552kPa (80psig) CDA to valve outlet Less than 4 bubbles per minute through 1/32″ ID tubing immersed in DI water Valve drive Pressure decay 552kPa (80psig) CDA Pressure drop less than 7 kPa (1 psig/min)
Naming Convention
Pneumatic PFA Diaphragm Valve Model Indication and Model Selection
Surface Roughness Specifications & Surface Extractability Specifications
Surface roughness
Surface roughness specification
Surface roughness specification Component Description SEMI F57 0622 Recommended value Ra (µm) Typical test results Ra (µm) Injection molded valve body ≤0.35 ≤0.30 Machine-machined PTFE diaphragm ≤0.35 ≤0.20 Injection molded fitting flow path ≤0.35 ≤0.25 Machine-machined PFA valve body ≤0.60 ≤0.30 Machine-machined PTFE valve body ≤0.60 ≤0.40 Surface extractable specifications
The test liquid used was ultrapure water and the test was carried out at 85°C. The parts were leached after the prescribed rinsing pretreatment. The immersion time was 7 days.
Extractable ionic contamination
Surface extractable ionic contamination
Surface extractable ionic contamination Ion types SEMI F57 0622 Recommended value (µg/m³) Typical product measurement values (ultrapure water 85°C+5°C, 7-day leaching value) (µg/m³) Ammonium ions NH4+ ≤100 <0.1 Bromide ions Br− ≤100 <0.1 Chloride ions Cl− ≤100 <3 Fluoride ions F− ≤20000 <133 Nitrate ions NO3 ≤100 <0.1 Nitrite ions NO2 ≤100 <0.1 Phosphate ions PO42− ≤100 <0.1 Sulfate ions SO42− ≤100 <0.1 Extractable Metal Contamination
Surface extractable metal contaminants
Surface extractable metal contaminants Test items (tcp-ms) SEMI F57 0622 Recommended value (μg/m²) Typical product measurement values (ultrapure water 85°C + 5°C, 7-day leaching value) (μg/m²) Aluminum AI ≤5 <0.2 Arsenic AS ≤2 <0.1 Antimony Sb ≤2 <0.1 Barium Ba ≤15 <0.2 Boron B3 ≤30 <0.5 Cadmium Cd ≤2 <0.01 Calcium Ca ≤10 <0.21 Chromium Cr ≤1 <0.2 Copper Cu ≤10 <0.2 Iron Fe ≤5 <0.2 Lead Pb ≤1 <0.05 Lithium Li ≤2 <0.2 Magnesium Mg ≤2 <0.2 Manganese Mn ≤5 <0.2 Nickel Ni ≤1 <0.2 Potassium K ≤10 <0.5 Sodium Na ≤10 <0.5 Strontium Sr ≤0.5 <0.05 Titanium Ti ≤2 <0.1 Tin Sn ≤2 <0.1 Vanadium V ≤2 <0.01 Zinc Zn ≤5 <0.2
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