1. SWA S30/31 Resilient Seated Valves Nylon 11 Coated Disc - Excellent for Seawater Applications Special Seat Geometry and Compounding Internal Drive Connection Provides Smooth Surface for Coating ISO Top Ensures Easy Automation

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

3. 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

4. SWA Chloride (ppm ) BodySeatDiscStem < 20,000(ASTM 126 Class B) EPDM/ BUNA-N Nylon 11 Coated (ASTM 536 Gr 65-45-12) (ASTM A479 Type 316N) < 30,000(ASTM 126 Class B) EPDM/ BUNA-N Nylon 11 Coated (ASTM 536 Gr 65-45-12) (ASTM A479 Type 316N) < 40,000(ASTM 126 Class B) EPDM/ BUNA-N (ASTM A351 CK3MCuN)(ASTM A479 Type 316N) < 55,000(ASTM 126 Class B) EPDM/ BUNA-N (ASTM A351 CK3MCuN)(ASTM A479 Type 316N) < 100,000(ASTM 126 Class B) EPDM/ BUNA-N (ASTM A494 CW2M)(ASTM A479 Type 316N) Resilient Seated Butterfly Valves Material Selection for Seawater Systems

5. SWA Nylon 11 Coating

6. 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

7. 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

8. 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.

9. 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.

10. 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.

11. SWA Bray Series 31 Valve with Nylon 11 Coated Ductile Iron (NDI) Disc 5 years Seawater Exposure AWWA C504 Compliant Valve with Rubber Coated Disc 19 month Seawater Exposure Nylon 11 vs. Rubber Covered Disc

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

13. 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

14. 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

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

16. SWA Nylon 11 Showed No Deterioration

17. SWA Nylon 11 Physical / Chemical Properties Melting Point363 o F – 367 oFoF Rockwell Hardness 106 Surface Hardness (68 o F / 10 sec)11,600 PSI Scratch Resistance13.3 lbf

18. SWA High Performance Butterfly Valves

19. 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 ®

20. 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

21. SWA High Performance Butterfly Valves Material Selection for Seawater Systems Chlorides (ppm) Body & DiscStem & Taper Pin < 20,000(ASTM A995 / A995M Gr.5A)(ASTM 479 / Type 316N) < 30,000(ASTM A995 / A995M Gr.5A)(ASTM 479 / Type 316N) < 40,000(ASTM A351-CK3MCuN)(ASTM A479 / AL-6XN) < 55,000(ASTM A351-CK3MCuN)(ASTM A479 / AL-6XN) < 100,000(ASTM A494-CW2M)(ASTM C276 / UNS N10276)

22. 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

23. 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 Newington Energy Project Mitsubishi Mhi Po Black & Veatch General Electric / Ionics Desalcot Trinidad Koch Membrane Degremont Siemens / US Filter / Power Veolia