Sanitary and Chemical Resilient Seated

Product catalog summary

Overview: The document details the specifications and features of Bray Controls' Series 20/21 butterfly valves, designed for high performance in sanitary and chemical applications. These valves are available in sizes from 1" to 20" and are suitable for various industrial applications due to their unique design and material composition.

Specifications: The Series 20/21 valves feature a two-piece wafer or lug style body, available in cast iron, ductile iron, or stainless steel. They have a unique tongue-and-groove seat design for complete isolation of the flowing media, reducing torque and simplifying field replacement. The valves are compatible with multiple international flange standards, enhancing versatility in global markets.

Design Features: Key design elements include a one-piece disc/stem made from 316 stainless steel or Hastelloy, providing superior erosion and abrasion resistance. The disc/stem is encased in EPDM or Buna-N for additional protection. The valves also feature a non-corrosive acetal bushing, a double "U" cup stem seal, and an extended neck for easy actuator mounting.

Material Selection: The valves offer various seat materials, including Buna-N, EPDM, and PTFE, to suit different applications. The disc/stem can be rubber-molded or PTFE-molded over stainless steel inserts, offering excellent corrosion protection and durability.

Performance and Ratings: The valves are rated for a maximum pressure of 150 psi for resilient seated valves and 100 psi for PTFE seated valves. They are designed for bi-directional bubble-tight shut-off and are tested to 110% of their full pressure rating. Specific torque ratings ensure reliable performance across various applications.

Applications and Recommendations: Bray valves are recommended for installation between ANSI Class 125/150 lb. flanges and are suitable for both weld-neck and slip-on flanges. They are designed to handle a wide range of chemical environments, making them ideal for sanitary applications, outdoor weathering, and severe corrosive conditions.

Additional Specifications: The document outlines pressure ratings for valves with and without downstream flanges: 75 psi for 2"-12" valves and 50 psi for 14"-20" valves. It provides weights for Series 20 and Series 21 valves and details components such as the body, seat, disc/stem, stem seal, stem bushing, and body bolts. Temperature ranges for seat materials are specified: EPDM (+250°F to -40°F), Buna-N (+212°F to 0°F), FKM (+400°F to 0°F), and PTFE-Lined EPDM (+250°F to -20°F).

Assembly Installation: Instructions include positioning the disc in a partially open position, placing the body between flanges, and ensuring proper alignment before tightening flange bolts.

Maintenance and Repair: Bray valves require minimal maintenance and no routine lubrication. Components are field replaceable without adjustment. It advises ensuring the piping system is depressurized before maintenance.

Disassembly and Assembly: Disassembly steps include removing the handle or actuator, body bolts, and separating the body halves to access the seat and disc/stem. Reassembly instructions include applying silicone oil or soap and water for installation, aligning body halves, and replacing components.

General Information: All technical information and recommendations are for general use, and it advises consulting Bray representatives for specific applications. The document reserves the right to modify product design without prior notice.

Catalog excerpts

Sanitary and Chemical Resilient Seated-1

Wafer/Lug1"- 20" (25mm-500mm) SERIES 20/21 SANITARY AND CHEMICAL / RESILIENT SEATED BUTTERFLY VALVES >

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Sanitary and Chemical Resilient Seated-2

DISC / STEM ( A ) STEM BUSHING ( B ) 1"20" (25mm֖500mm) Bray Controls is proud to offer a high quality line of butterfly valves to meet the stringent requirements of todays appli- cations. The Series 20/21 valve not only surpasses the high standards required in sanitary valve applications, but it also has unique inherent flow characteristics and capabilities. For High Performance in butterfly valve flow control, choose the ғEngineers Valve.Ҕ B DC J F > SERIES 20 One-piece design. The disc edge is spherically machined and hand polished to produce a bubble- tight shut off, minimum torque, and longer...

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See chart for Actuator Mounting Flange Drilling. > Valve Size > Mounting Flange Drig. ins mm >

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Sanitary and Chemical Resilient Seated-4

Cv VALUESVALVE SIZING COEFFICIENT FLANGE REQUIREMENTS Bray valves are designed for installation between ANSI Class 125/150 lb. weld-neck or slip- on flanges, BS 10 Tables D & E, BS 4504 NP10/16, DIN ND 10/16, AS 2129 and JIS 10, either flat faced or raised faced. While weld-neck flanges are recom- mended, Bray has specifically designed its valve seat to work with slip-on flanges, thus eliminating common failures of other butterfly valve designs. When using raised face flanges be sure to properly align valve and flange. Type C stub-end flanges are not recommended. > Valve Size Disc Position (degrees)...

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1"-12" One Piece (Investment Cast) All Metal > ׮ s C-22 per ASTM B494 Type CX2MW 14"-20" (Fabricated) Stem 316 Stainless Steel per ASTM A276 s Stem Buna-N 17-4 ph Stainless Steel per ASTM A564 Type 630 Heat Treated s PTFE Molded 2"-12" PTFE molded over One Piece Stainless Steel insert (Investment Cast) 17-4 ph Stainless Steel per ASTM A747 Type CB7Cu-1 Heat Treated Halar > ֮ Type CB7Cu-1 Heat Treated14"-20" Material molded over Stainless Steel insert (Fabricated) C-276 ASTM B575 Alloy N10276 Stem Hastelloy > s s C-276 ASTM B575 Alloy N10276 > SPECIFICATIONS Rubber Molded Type CB7Cu-1 Heat Treated...

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DISTRIBUTOR Disc in the Near Closed Position All statements, technical information, and recom-mendations in this bulletin are for general use only. Consult Bray representatives or factory for the specific requirements and material selection for your intended application. The right to change or modify product design or product without prior notice is reserved. Disc in the Partially Open PositionDisc in the Full Open Position > A Division of BRAY INTERNATIONAL, Inc.13333 Westland East Blvd. Houston, Texas 77041 281.894.5454 FAX 281.894.9499 www.bray.com Patents applied for in U.S. and foreign countries.Bray...

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Sanitary and Chemical Resilient Seated

Sanitary and Chemical Resilient Seated

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