Bus Communication Summary

1
S30/31 Resilient Seated Valves

• Nylon 11 Coated Disc - Excellent for Seawater
  Applications

• Internal Drive Connection Provides Smooth
  Surface for Coating

• Special Seat Geometry and Compounding

• ISO Top Ensures Easy Automation

2
What makes seawater aggressive toward AWWA
valves, or specifically, toward metallic wetted
parts of any valve?
3
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
Resilient Seated Butterfly Valves Material
Selection for Seawater Systems
Chloride (ppm) Body Seat Disc Stem
lt 20,000 (ASTM 126 Class B) EPDM/ BUNA-N Nylon 11 Coated (ASTM 536 Gr 65-45-12) (ASTM A479 Type 316N)
lt 30,000 (ASTM 126 Class B) EPDM/ BUNA-N Nylon 11 Coated (ASTM 536 Gr 65-45-12) (ASTM A479 Type 316N)
lt 40,000 (ASTM 126 Class B) EPDM/ BUNA-N (ASTM A351 CK3MCuN) (ASTM A479 Type 316N)
lt 55,000 (ASTM 126 Class B) EPDM/ BUNA-N (ASTM A351 CK3MCuN) (ASTM A479 Type 316N)
lt 100,000 (ASTM 126 Class B) EPDM/ BUNA-N (ASTM A494 CW2M) (ASTM A479 Type 316N)
5
Nylon 11Coating
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
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
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
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
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 oF. Sulfur Cured EPDM
  will Age.
• Nylon 11 is Inert.

11
Nylon 11 vs. Rubber Covered Disc
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
12
Rubber Covered Valve Disc(19 Month Seawater
Service)
13
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
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
Nylon 11 vs. Other Coatings(18 Month Salt Water
Emersion)
16
Nylon 11 Showed No Deterioration
17
Nylon 11Physical / Chemical Properties
Melting Point 363 oF 367 oF Rockwell
Hardness 106 Surface Hardness (68 oF / 10
sec) 11,600 PSI Scratch Resistance 13.3 lbf
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High PerformanceButterfly Valves
19
ANSI Class 150/300/600 High Performance
Butterfly Valves

• API 607 4th Edition Certified
• 2 ½ - 60
• Special Alloys
• Duplex and Austenitic Stainless Steels
• Hastelloy

20
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
High Performance Butterfly Valves Material
Selection for Seawater Systems
Chlorides(ppm) Body Disc Stem Taper Pin
lt 20,000 (ASTM A995 / A995M Gr.5A) (ASTM 479 / Type 316N)
lt 30,000 (ASTM A995 / A995M Gr.5A) (ASTM 479 / Type 316N)
lt 40,000 (ASTM A351-CK3MCuN) (ASTM A479 / AL-6XN)
lt 55,000 (ASTM A351-CK3MCuN) (ASTM A479 / AL-6XN)
lt 100,000 (ASTM A494-CW2M) (ASTM C276 / UNS N10276)
22
One of Many Seawater Applications

• Chiles 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
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