PFA Lined Diaphragm Valve Leaflet: Features, Measurements & Materials

PFA Lined Diaphragm Valve DN 80 DN 80 - Main view - High quality industrial valve by GFT9

Membron9

The Membron9 PFA-lined diaphragm valve is meticulously designed to handle highly corrosive, pure, and ultra-pure media with unparalleled performance and minimal maintenance. Its virgin PFA lining ensures exceptional chemical resistance, making it the ideal solution for demanding applications where conventional materials fail. Featuring a top-entry design for easy maintenance, complete isolation of working parts from process media, and guaranteed bubble-tight sealing (Class VI leakage rate), the Membron9 sets the standard for reliability and efficiency in fluid control.

Parameter Value
Name Membron9
Design Norm DIN/ISO | ANSI
Size DN15-150 | NPS ½-6
Flange Dimensions DIN 2501 (PN 16) | ASME B16.10 (Class 150-RF LP)
Face-Face-Dimensions PN (EN 558-1), Series 1 | ANSI-B-16.5
Lining Options PFA, PFA/AS, PVDF
Body Materials WCB/PFA, CF8/ SS 304 , 1.4401
Pressure Range Depending on Size (see P-T Diagram below)
Custom Options Various Actuation Types, 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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More on PFA's Properties

Diaphragm Valve Leaflet Features

  • Top Entry Design – Low Maintenance

    Innovative top-entry valve design allows for easy maintenance without dismantling, ensuring minimal downtime.

  • Complete Isolation


    All working parts are fully isolated from process media, enhancing durability and preventing contamination.

  • 100% Leak Tight – Class VI

    Leakage Rate
Guaranteed bubble-tight sealing, ensuring zero leakage performance.

  • Weir Type & Straight-Through Options

    
Available as a hermetically tight weir-type valve, with an optional straight-through design for specific applications. FDA-compliant for pharmaceutical and food-grade processes.

  • Flexible Actuation & Accessories


    Standard handwheel operation, with optional pneumatic or electric actuators, positioners, limit switches, and more to meet automation needs.

  • Versatile Installation


    Designed for vertical and horizontal installation, offering flexibility in various system configurations.


  • Visual Travel Indicator


    Bright yellow position indicator for quick and easy visual monitoring of valve status.

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Our Diaphragm Valve Leaflet Certificates

  • Safety Integrity Level

    Ensuring operational safety

    Learn More 

  • Pressure Equipment Directive

    Certified for high-pressure environments

    Learn More 
Learn More

Measurement | Dimensions | P-T Diagram

Dimensional Measurements

Size L ød øk øD Bolting Torque
DN 15 130 mm 45 mm 65 mm 95 mm 4 x 14 (M12) 80
DN 20 150 mm 58 mm 75 mm 105 mm 4 x 14 (M12) 85
DN 25 160 mm 68 mm 85 mm 115 mm 4 x 14 (M12) 115
DN 40 200 mm 88 mm 110 mm 150 mm 4 x 18 (M16) 155
DN 50 230 mm 102 mm 125 mm 165 mm 4 x 18 (M16) 155
DN 65 290 mm 122 mm 145 mm 185 mm 4 x 18 (M16) 190
DN 80 310 mm 138 mm 160 mm 200 mm 8 x 18 (M16) 200
DN 100 350 mm 158 mm 180 mm 220 mm 8 x 18 (M16) 245
DN 125 400 mm 188 mm 210 mm 250 mm 8 x 18 (M16) 300
DN 150 480 mm 212 mm 240 mm 285 mm 8 x 22 (M20) 360
Size L ød øk øD Bolting Torque
NPS ¾" 117 mm 42,9 mm 69,8 mm 98,4 mm 4 x 15.9 85
NPS ½" 108 mm 34,9 mm 60,3 mm 88,9 mm 4 x 15.9 80
NPS 1" 127 mm 50,8 mm 79,4 mm 108 mm 4 x 15.9 115
NPS 1½" 165 mm 73 mm 98,4 mm 127 mm 4 x 15.9 155
NPS 2" 178 mm 92,1 mm 121 mm 152,4 mm 4 x 19 155
NPS 2½" 190 mm 104,8 mm 139,7 mm 177,8 mm 4 x 19 190
NPS 3" 203 mm 127 mm 152,4 mm 190,5 mm 4 x 19 200
NPS 4" 229 mm 157,2 mm 190 mm 228,6 mm 8 x 19 245
NPS 6" 394 mm 216 mm 241 mm 279 mm 8 x 22.2 360

Sectional Drawing

Pos. Item Material
1 Lined Body WCB, CF8 - PFA Lined
2 Bonnet WCB, CF8
3 Spindle SS316
4 Compressor Pin Type WCB, CF8
5 Handwheel CF8
6 Opening Indicator Sleeve HDPE
7 Diaphragm (pin Type) PTFE Backed with EPDM
8 Compression Spring Stainless Steel
9 Dowell Pin Spring Steel
10 Stud Stainless Steel
11 Nut Stainless Steel
12 Plain Washer Stainless Steel

P‑T Diagram

P-T Diagram for the Diphragm Valve

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.

  • Digital Friendly

    Quote, buy & manage documentation in one place.
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