PTFE Check Valve
The CYLEX PTFE Check Valve is engineered for the most demanding industrial applications. Manufactured from 100% virgin PTFE (Teflon®), it guarantees absolute resistance to virtually all aggressive chemicals and prevents backflow with zero risk of contamination. Ideal for semiconductor, pharmaceutical, and critical chemical processing industries, this valve delivers reliability backed by American manufacturing excellence.
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
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CYLEX PTFE Check Valves: Uncompromising Purity & Corrosion Resistance
In critical fluid handling systems, even the smallest component failure can lead to costly downtime, safety hazards, and product contamination. The CYLEX PTFE Check Valve is designed as the definitive solution for reliability in harsh environments. Unlike metallic or composite valves, our one-piece PTFE construction eliminates the risk of corrosion, leaching, and particle generation. Trust CYLEX to protect your process, your product, and your bottom line.
PTFE Check Valve Specification
| Part No. | Size | Interface | A (mm) | B (mm) | D (mm) | Kv value | Cv value |
|---|---|---|---|---|---|---|---|
| D-F-CV-01-04-FE | 1/4 “ | Flare | 95 | 38 | 33 | 3.62 | 0.32 |
| D-F-CV-01-06-FE | 3/8 “ | Flare | 100 | 38 | 33 | 12.80 | 1.17 |
| D-F-CV-01-08-FE | 1/2 “ | Flare | 105 | 36 | 39 | 28.36 | 2.33 |
| D-F-CV-01-12-FE | 3/4 “ | Flare | 114 | 43 | 48 | 55.29 | 5.04 |
| D-F-CV-01-16-FE | 1 “ | Flare | 144 | 56 | 69 | 81.93 | 11.85 |
| D-F-CV-01-20-FE | 1-1/4 “ | Flare | 193 | 68 | 98 | ||
| D-F-CV-01-24-FE | 1-1/2 “ | Flare | 198 | 68 | 98 |
Characteristic
● All PTFE components, ultra-corrosion resistant
● Low opening pressure and low resealing pressure
● Extremely low pressure drop
● Minimal entrapment
● No O-ring design ensures clean operation.
● Unique tongue and groove sealing structure with excellent anti-leakage performance
Technical indicators
● Opening pressure：0.006MPa（0.06kg）
● Back pressure / sealing pressure：0.015MPa（0.15kg）
● Maximum pressure：0.65Mpa（6.5kg）
Target Applications – Who Uses This Valve?
● Semiconductor Industry: For ultra-pure chemical delivery in wet etch, clean, and CMP processes.
● Pharmaceutical & Biotech: In bioreactors, filtration systems, and chromatography skids to prevent cross-contamination.
● Chemical Processing: Handling aggressive acids (HCl, H2SO4), bases (NaOH, KOH), and halogen gases.
● Water & Environmental Analysis: As a critical component in online analyzers for reagent dosing.
● Industrial Equipment: Protecting pumps and sensitive instrumentation from damaging backflow.
Your Reliable Fluid Control Partner
Don’t compromise on the components that guard your core process. Choose CYLEX for PTFE Check Valves that are built to perform, day in and day out.
At CYLEX, we are committed to providing not just products, but solutions. Our PTFE Check Valves are manufactured under strict quality control to ensure they meet the highest standards.
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)
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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