S 3031 Resilient Seated Valves Nylon 11 Coated

S 30/31 Resilient Seated Valves • Nylon 11 Coated Disc Excellent for Seawater Applications • Internal Drive Connection Provides Smooth Surface for Coating • Special Seat • ISO Top Ensures Easy Automation Geometry and Compounding SWA

What makes seawater aggressive toward AWWA valves, or specifically, toward metallic wetted parts of any valve? SWA

Chloride Levels • 80% of Dissolved Solids in Seawater are Sodium Chloride - 1/3 Sodium Ions, and 2/3 Chloride Ions • Chloride Ions Present in Seawater Range from 18, 000 to 19, 200 ppm • Bray Controls Currently Handles Chloride Levels in Excess of 70, 000 ppm SWA

Resilient Seated Butterfly Valves Material Selection for Seawater Systems Chloride (ppm) Body Seat Disc Stem < 20, 000 (ASTM 126 Class B) EPDM/ BUNA-N Nylon 11 Coated (ASTM 536 Gr 65 -45 -12) (ASTM A 479 Type 316 N) < 30, 000 (ASTM 126 Class B) EPDM/ BUNA-N Nylon 11 Coated (ASTM 536 Gr 65 -45 -12) (ASTM A 479 Type 316 N) < 40, 000 (ASTM 126 Class B) EPDM/ BUNA-N (ASTM A 351 CK 3 MCu. N) (ASTM A 479 Type 316 N) < 55, 000 (ASTM 126 Class B) EPDM/ BUNA-N (ASTM A 351 CK 3 MCu. N) (ASTM A 479 Type 316 N) < 100, 000 (ASTM 126 Class B) EPDM/ BUNA-N (ASTM A 494 CW 2 M) (ASTM A 479 Type 316 N) SWA

Nylon 11 Coating SWA

Nylon 11 Coating Advantages • Less Expensive Alternative to Nickel Aluminum Bronze and Duplex Stainless Steel • Excellent Corrosion Resistance • Excellent Impact and Abrasion Resistance • Proven in Seawater Service § No Corrosion After 20 Years Exposure • Excellent in Salt Spray Environments § No Corrosion After 2000 Hours Exposure SWA

Nylon 11 Coating Advantages • Thermoplastic Produced from Vegetable Base • Low Coefficient of Friction Resulting in Lower Seating and Unseating Torques • Not Subject to Ultraviolet Deterioration • FDA / NSF-61 Approved for Sanitary Applications SWA

Nylon 11 vs. Rubber Covered Discs Nylon 11 — Applied Uniformly and Continuously Over the Entire Disc Surface. vs. Rubber — (a) Lapped on Disc Surface and Edge, then Machined. or (b) Bonded to Disc Substrate and Disc Edge is a Corrosion Resistant Metal. Both Resulting in a Lack of Continuous Integrity of the Coating on the Disc and Exposure of Areas to Seawater Attack. SWA

Nylon 11 vs. Rubber Covered Discs • Nylon 11 Disc Edges have Lower Coefficient of Friction than Rubber Covered and Metal Disc Edges Resulting in Lower Seating and Unseating Torques. • Nylon 11 Discs and Rubber Seats Form Better Seal at Higher Pressures than Rubber Discs and Seats. SWA

Nylon 11 vs. Rubber Covered Discs • Nylon 11 Discs do NOT Allow Barnacle Growth. Rubber Covered Discs Allow Barnacle Growth which Results in Cutting of the Seat Upon Opening and Closing. • Nylon 11 is Thermoplastic and will NOT Age with Temperatures below 200 o. F. Sulfur Cured EPDM will Age. • Nylon 11 is Inert. SWA

Nylon 11 vs. Rubber Covered Disc Bray Series 31 Valve with Nylon 11 Coated Ductile Iron (NDI) Disc 5 years Seawater Exposure AWWA C 504 Compliant Valve with Rubber Coated Disc 19 month Seawater Exposure SWA

Rubber Covered Valve & Disc (19 Month Seawater Service) SWA

Nylon 11 Application Process • Final Dimensions Carefully Checked to Ensure Coating Thickness • Disc is Subjected to Holiday Spark Test to Ensure Integrity of Coating SWA

Nylon 11 vs. Other Coatings • Nylon 11 Coated Ductile Iron Samples Subjected to Salt Water Emersion for 18 Months • Nylon 11 Showed No Deterioration or Corrosion SWA

Nylon 11 vs. Other Coatings (18 Month Salt Water Emersion) SWA

Nylon 11 Showed No Deterioration SWA

Nylon 11 Physical / Chemical Properties SWA Melting Point 363 o. F – 367 o. F Rockwell Hardness 106 Surface Hardness (68 o. F / 10 sec) 11, 600 PSI Scratch Resistance 13. 3 lbf

High Performance Butterfly Valves SWA

ANSI Class 150/300/600 High Performance Butterfly Valves • API 607 4 th Edition Certified • 2 ½ ”- 60” • Special Alloys • Duplex and Austenitic Stainless Steels • Hastelloy® SWA

ANSI Class 150/300/600 High Performance Butterfly Valves • Bi-directional Design • Blow-out Proof Stem • Easy Automation • Foolproof Installation • Unique Pressure Assisted Seat Design SWA

High Performance Butterfly Valves Material Selection for Seawater Systems Chlorides (ppm) Body & Disc Stem & Taper Pin < 20, 000 (ASTM A 995 / A 995 M Gr. 5 A) (ASTM 479 / Type 316 N) < 30, 000 (ASTM A 995 / A 995 M Gr. 5 A) (ASTM 479 / Type 316 N) < 40, 000 (ASTM A 351 -CK 3 MCu. N) (ASTM A 479 / AL-6 XN) < 55, 000 (ASTM A 351 -CK 3 MCu. N) (ASTM A 479 / AL-6 XN) < 100, 000 (ASTM A 494 -CW 2 M) (ASTM C 276 / UNS N 10276) SWA

One of Many Seawater Applications • Chile’s Escondida Mine, the Largest Privately. Owned Copper Mine in the World • 60” Series 41 ANSI 150 High Performance Butterfly Valve • 254 - SMO Duplex SS SWA

Selected Users of Bray Valves in Seawater • Tampa Desalination Plant • Fluor • CFE Power • Sea World • Escondida Mine (Chile) • Albwardy Marine (Dubai) • Dubai Drydocks • British Petroleum • Israel Dead Sea Desalination Plant • Corpus Christi Energy Center SWA • Newington Energy Project • Mitsubishi • Mhi Po • Black & Veatch • General Electric / Ionics • Desalcot Trinidad • Koch Membrane • Degremont • Siemens / US Filter / Power • Veolia