PFA Lined PFA-beklede Kogelterugslagklep | DN 25-100 | Betrouwbare Terugslagpreventie

GFT 9 PFA Transfer Molding Meets Precision Engineering

PFA Lined Ball Check Valve

Prohibron9
The Prohibron9 Ball Check Valve offers secure, maintenance-friendly backflow protection for pipelines transporting corrosive, pure, or vaporous media. Engineered with a virgin PFA lining, it provides superior chemical resistance, minimal permeation, and vacuum-tight sealing. Its pressure-resistant metal body ensures durability in high-pressure systems, while the valve’s center-guided ball design allows automatic closing in both vertical and horizontal installations (with defined minimum flow conditions). With only one moving part and no need for external actuation, the Prohibron9 delivers long service life with minimal maintenance. Optional non-stick linings and custom coatings further enhance adaptability, making it the optimal solution where safety, cleanliness, and reliability are essential. The Prohibron9 stands as a key component in aggressive media systems where conventional materials like stainless steel or plastics fall short.

Core PFA Features

Corrosion Resistance

Delivers superior chemical resistance against diverse corrosive agents, extending equipment lifespan.

Low Friction / Non-Stick

Minimizes friction and buildup for smooth flow and reduced wear.

Electrical Insulation

Provides robust insulation for safe, reliable performance in critical applications.

Thermal Stability

Maintains consistent performance across extreme temperatures, reducing maintenance needs.

Key Specifications

Design Norm: DIN/ISO • Size: DN 25-250 | NPS 1"-10" • Face-to-Face Dimensions: PN (EN 558-1), Series 1 | ANSI-B-16.5 • Flange Dimensions: DIN 2501 (PN 16) • Lining: PFA, PFA/AS, FEP, PP, PVDF • Body: 1.0619 or 1.4308/1.4408/1.4409 | A216/WCB,CF8/CF8M/CF3M • Pressure Range: Vacuum to 10 bar, according to pressure-temperature diagram • Temperature Range: -10°C up to 200°C • Leakage Rate: According to DIN 12266-1, leakage rate A • Certificates: EU Pressure Equipment Directive 2014/68/EU, SIL • Quality: Body 16bar, Back Seat 2 bar leakage rate D (other leakage rates on request), Spark Test 20kV

Product overview

Partner with GFT9

Global Reach

Based in Germany, delivering worldwide through our global network.

Manufacturer

Decades of experience in PFA lining & manufacturing

Dependable

Reliable Lead Time, routinely between 1-6 weeks.

Digital Friendly

Quote, buy & manage documentation in one place.
GFT 9 PFA Transfer Molding Meets Precision Engineering

PFA-beklede Kogelterugslagklep | DN 25-100 | Betrouwbare Terugslagpreventie Features

Feature Image 5

Vertical installation & Horizontal Installation


for uncomplicated installation in all environments (min. 1 bar differential pressure required for horizontal installation).

Vertical Installation (up to 60°)


valve closes automatically due to center guided ball

Horizontal Installation (90° to 60°)


valve closes automatically, if backflow is 1,5 - 2,5m/s (water based)

Leakage Class D for Enhanced Process Safety


controlled and minimal leakage (<0,1% of valve capacity).

Low Maintenance


due to only a single moving part

Our PFA-beklede Kogelterugslagklep | DN 25-100 | Betrouwbare Terugslagpreventie Certificates

Pressure Equipment Directive

Pressure Equipment Directive

Learn More
Safety Integrity Level

Safety Integrity Level

Learn More
GFT 9 PFA Transfer Molding Meets Precision Engineering

Prohibron9 Materials

Materials Drawing
Pos. Item Material
1 Body ASTM A216 WCB (1.0619), CF8-M (1.4408)
2 Lining PFA, PFA/AS, FEP, PVDF
3 Ball PTFE massive or hollow
5 Screws A2/A4-70 Stainless Steel
6 Nuts A2/A4-70 Stainless Steel
GFT 9 PFA Transfer Molding Meets Precision Engineering

Prohibron9 Measurements

Measurement Drawing
Size L ød øk øD Bolting Weight
DN 15 130 mm 45 mm 65 mm 95 mm 4 x 14 (M12) 8 kg
DN 25 160 mm 68 mm 85 mm 115 mm 4 x 14 (M12) 5,6 kg
DN 40 200 mm 88 mm 110 mm 150 mm 4 x 18 (M16) 9,7 kg
DN 50 230 mm 102 mm 125 mm 165 mm 4 x 18 (M16) 13 kg
DN 80 310 mm 138 mm 160 mm 200 mm 8 x 18 (M16) 27 kg
DN 100 350 mm 158 mm 180 mm 220 mm 8 x 18 (M16) 35 kg
DN 150 480 mm 212 mm 240 mm 285 mm 8 x 22 (M20) 74,5 kg
DN 200 600 mm 268 mm 295 mm 340 mm 12 x 22 (M20) 200 kg
Size L L1 ød øk øD Bolting Weight
NPS 1" 127 mm 50,8 mm 79,4 mm 108 mm 4 x 15.9 4,9 kg
NPS 1½" 165 mm 73 mm 98,4 mm 127 mm 4 x 15.9 8,9 kg
NPS 2" 178 mm 92,1 mm 121 mm 152,4 mm 4 x 19 12 kg
NPS 3" 203 mm 127 mm 152,4 mm 190,5 mm 4 x 19 26 kg
NPS 4" 229 mm 157,2 mm 190 mm 228,6 mm 8 x 19 35 kg
NPS 6" 480 mm 216 mm 241 mm 279 mm 8 x 22.2 74,5 kg
NPS 8" 457 mm 269,9 mm 330,2 mm 381 mm 12 x 25.4 155,5 kg
GFT 9 PFA Transfer Molding Meets Precision Engineering

Pressure Temperature Diagram

Pressure-Temperature diagram

Flow Rates

Size DIN kv100 [m³/h]
DN 15
DN 25 27
DN 40 97
DN 50 122
DN 80 300
DN 100 410
DN 150 360
DN 200 OR
Size ANSI CV [USgpm]
NPS 1" 31
NPS 1½" 113
NPS 2" 142
NPS 3" 348
NPS 4" 476
NPS 6" 418
NPS 8" 390
GFT 9 PFA Transfer Molding Meets Precision Engineering

Industry Use Cases

PFA-lined components are essential in industries that handle aggressive or high-purity fluids. Thanks to PFA’s exceptional chemical resistance, the Prohibron9 can be used with strong acids, bases, solvents, and even permeating agents without degrading. Its high thermal stability, non-stick surface, and low permeability enable safe and efficient operation even in high-temperature and pressure conditions, reducing product contamination and material wear. These properties make PFA-lined ball check valves especially suitable for industries where fluid purity, corrosion resistance, and low maintenance are vital. From chemical plants to pharmaceutical production, the Prohibron9 ensures reliable backflow prevention under chemically and mechanically demanding conditions.

Chemical Processing

Application: Backflow protection in acid dosing lines for sulfuric or hydrochloric acid Need: High chemical resistance, minimal leakage, and vacuum tightness

Fine Chemicals

Application: Safe transfer of high-purity solvents and reactive agents Need: Non-stick PFA surface to avoid contamination and degradation

Pharmaceuticals & Biotechnology

Application: Prevention of reverse flow in ultrapure water and buffer solution lines Need: Contamination-free, non-metallic fluid contact and excellent cleanability

Petrochemical Industry

Application: Non-return valve for chemical injection systems Need: Durability under high-pressure systems and reliable sealing

Pulp and Paper

Application: Reverse flow protection in bleach or dye lines Need: Corrosion-resistant internals and low-maintenance performance

Mining and Metallurgy

Application: Check valve for process slurries with chemical additives Need: Tough, corrosion-proof design with optional non-adhesive lining for solids-containing media

Water & Wastewater Treatment

Application: Preventing contamination in chemical dosing or neutralization systems Need: Corrosion resistance, non-clogging design, and easy service access

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