PFA Lined Sight Glass: Features, Measurements & Materials

Videron9

The GFT9 Videron PFA/Teflon double window sight glass is the ultimate solution for operators requiring continuous, real-time observation of process media in highly corrosive and high-pressure environments. Designed for both vertical and horizontal installations, it offers unmatched durability and reliability with minimal maintenance.

Its virgin PFA lining provides superior chemical resistance against aggressive, reactive, and permeating substances, far outperforming stainless steel or standard plastic alternatives. Additionally, its vacuum-proof anchoring system, secured through mechanical clamping, ensures exceptional sealing integrity, preventing leakage and structural failure—even in extreme process conditions.

With a robust, pressure-bearing metal body and double borosilicate glass windows, the Videron guarantees safe, clear, and obstruction-free monitoring of liquid levels, flow, and fluid conditions. Trusted across industries from chemical processing to pharmaceuticals, food & beverage, and petrochemicals, it sets the standard for reliable and maintenance-free sight glass solutions in the most demanding applications.

Parameter Value
Name Videron9
Design Norm DIN/ISO / ANSI
Size DN25 - DN150 / 1/2” - 10”
Flange Dimensions DIN EN 1092-1 / ASME/ANSI B 16.5 Cl. 150
Face-Face-Dimensions DIN EN 558-10 / ISO 5752
Lining Options PFA, PFA/AS, PVDF, PP, UHMW-PE
Body Materials 1.0619 , 1.4308, 1.4408, Carbon Steel / A216WCB, CF8-M or CF-8, Carbon Steel
Pressure Range 16 bar
Temperature Range -10°C up to 150°C
Custom Options 5 mm lining, coatings
Certificates EU Pressure Equipment Directive 2014/68/EU

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.

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Sight Glass Features

  • Vertical installation & Horizontal Installation


    for uncomplicated installation in all environments

  • Double Window

    the two Borosilicate glass windows according to DIN 7080 allow a unobstructed monitoring of the media

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Our Sight Glass Certificates

  • Safety Integrity Level

    Ensuring operational safety

    Learn More 
  • Pressure Equipment Directive

    Certified for high-pressure environments

    Learn More 

Measurement | Dimensions | P-T Diagram

Dimensional Measurements

Size L ød øk øD Bolting øa Weight
DN 15 130 mm 45 mm 65 mm 95 mm 4 x 14 (M12) 32 mm 3 kg
DN 20 150 mm 58 mm 75 mm 105 mm 4 x 14 (M12) 32 mm 4 kg
DN 25 160 mm 68 mm 85 mm 115 mm 4 x 14 (M12) 48 mm 5.5 kg
DN 40 200 mm 88 mm 110 mm 150 mm 4 x 18 (M16) 65 mm 9.6 kg
DN 50 230 mm 102 mm 125 mm 165 mm 4 x 18 (M16) 80 mm 12.5 kg
DN 80 310 mm 138 mm 160 mm 200 mm 8 x 18 (M16) 100 mm 25.5 kg
DN 100 350 mm 158 mm 180 mm 220 mm 8 x 18 (M16) 125 mm 31.5 kg
DN 150 480 mm 212 mm 240 mm 285 mm 8 x 22 (M20) 142 mm 68 kg
DN 200 600 mm 268 mm 295 mm 340 mm 12 x 22 (M20) 190 mm 88 kg
DN 250 533 mm 220 mm 115 kg
Size L ød øk øD Bolting øa Weight
NPS ½" 108 mm 34.9 mm 60.3 mm 88.9 mm 4 x 15.9 32 mm 3 kg
NPS ¾" 117 mm 42.9 mm 69.8 mm 98.4 mm 4 x 15.9 32 mm 4 kg
NPS 1" 127 mm 50.8 mm 79.4 mm 108 mm 4 x 15.9 48 mm 4.8 kg
NPS 1½" 165 mm 73 mm 98.4 mm 127 mm 4 x 15.9 65 mm 8.8 kg
NPS 2" 178 mm 92.1 mm 121 mm 152.4 mm 4 x 19 80 mm 11.5 kg
NPS 3" 203 mm 127 mm 152.4 mm 190.5 mm 4 x 19 100 mm 22 kg
NPS 4" 229 mm 157.2 mm 190 mm 228.6 mm 8 x 19 125 mm 28.8 g
NPS 6" 394 mm 216 mm 241 mm 279 mm 8 x 22.2 142 mm 62 kg
NPS 8" 457 mm 269.9 mm 330.2 mm 381 mm 12 x 25.4 190 mm 82 g
NPS_10" 533 mm 220 mm

Sectional Drawing

Pos. Item Material
Lining PFA, PFA/AS, FEP, PP, PVDF
1 Body 1.0619 (A216 WCB), 1.4408 (CF-8M), 1.4116 (SS), Carbon Steel
2 Cover Plate 1.0619 (A216 WCB), 1.4408 (CF-8M), 1.4116 (SS), Carbon Steel
3 Glass Borosilicate Glass (DIN 7080)
4 Support PTFE/PTFE
5 Bolts and Nuts Stainless Steel A2, A4, a.A./o. o. req

P‑T Diagram

Sight Glass Pressure Temperature Diagram

Partner with GFT9

  • Global Reach

    Based in Germany, delivering worldwide

  • Direct from Manufacturer

    Decades of experience in PFA lining & manufacturing

  • Dependable Lead Times

    Standard variants available in 4-6 weeks.

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    Quote, buy & manage documentation in one place.

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