Butterfly Valves Series 3А, DN 50…500. PN 10/16, flanged

Батерфляй Bray S 3A

Bray Controls is proud to offer a high quality line of flanged butterfly valves to meet the requirements of today’s market. Combining years of field application experience, research and development, Bray has designed many unique features in the Series 3A/3AH not previously available. The results are longer service life, greater reliability, ease of parts replacement and interchangeability of components. Bray’s Series 3A/3AH valves are a double flanged design which can be used for dead-end service. All Bray valves are tested to 110% of full pressure rating before shipment. A major design advantage of Bray valve product lines is international compatibility. The same valve is compatible with most world flange standards – ASME Class 125/150, BS 10 Tables D and E, BS 4504 NP 10/16, DIN ND 10/16, AS 2129 and JIS10. In addition, the valves are designed to comply with ISO 5752 - Table 2 (short pattern) face-to-face and ISO 5211 actuator mounting flanges. Therefore, one valve design can be used in many different world markets. Bray interchangeability and compatibility offers the best in uniformity of product line and low-cost performance in the industry today.

Specifications

Version:
Series S3A / S3AH - flanged
Diameter nominal-metric DN, mm: 50…500
Pressure nominal PN, Bar: 12/16
Max pressure: 12 Bar for DN50…DN300 Series S3A
10 Bar for DN350…DN500 Series S3A
16 Bar for DN50…DN300 Series S3AH
Velocity limits: fluids: 9 m/s
gases: 54 m/s
Body materials*: polyester coated GG25 Grey Cast Iron
polyester coated GGG40.3 Ductile Iron
polyester coated 1.0446 Carbon Steel
Disk: Nylon11 coated GGG40 Ductile Iron
Halar coated GGG40 Ductile iron
1.4408 Stainless Steel
ASTM B148-954 Aluminium Bronze
Duplex Stainless Steel
Super Duplex Stainless Steel
Hastelloy
Stem: 1.4401 Stainless Steel
1.4301 Stainless Steel
1.4005 Stainless Steel
Monel K500
Seat: EPDM (-40...+121 C)
Buna-N (NBR) (-18...+100 C)
FKM (Viton) (-18...+204 C)
Actuator: handle/ gear operator / pneumatic actuator/electric actuator
Accessories: SS actuator / positioner/ solenoid valves

*other materials are available upon request

Datasheet

Bray’s Series 3A/3AH valves are a double flanged design which can be used for dead-end service. All Bray valves are tested to 110% of full pressure rating before shipment. A major design advantage of Bray valve product lines is international compatibility. The same valve is compatible with most world flange standards – ASME Class 125/150, BS 10 Tables D and E, BS 4504 NP 10/16, DIN ND 10/16, AS 2129 and JIS10. In addition, the valves are designed to comply with ISO 5752 - Table 2 (short pattern) face-to-face and ISO 5211 actuator mounting flanges. Therefore, one valve design can be used in many different world markets.

DISC AND STEM CONNECTION
Features a high-strength through stem design. The close tolerance, double “D” connection that drives the valve disc is an exclusive feature of the Bray valve. This internal connection eliminates the need for exposed disc-stem fasteners such as disc screws and taper pins which are exposed to the line media and potential corrosion leading to the creation of leak paths and disc-stem connection failures. Disc screws or taper pins, due to wear and corrosion, often require difficult machining for disassembly. Disassembly of the Bray stem is simply a matter of pulling the stem out of the disc. Without fasteners obstructing the line flow, the Cv values are higher than many other valves, turbulence is reduced, and pressure recovery is increased.

BRAY SEAT DESIGN
Brays seat design, aerospace-bonded to the body, is designed to seal with slip-on or weld-neck flanges. Seat totally encases the valve interior to isolate the line media from the body.

STEM RETAINING ASSEMBLY
The stem is retained in the body by means of a unique Stainless Steel “Spirolox®” retaining ring, a thrust washer and two C-rings, manufactured from brass as standard, stainless steel upon request. The retaining ring may be easily removed with a standard hand tool. The stem retaining assembly prevents unintentional removal of the stem during field service.

EXTENDED NECK
Extended neck length allows for 2" of piping insulation and is easily accessible for mounting actuators.

PRIMARY AND SECONDARY SEALS
The primary seal is achieved by pre-loaded contact of spherically machined hand polished disc hubs with unique molded seat flat surfaces. This sealing method isolates the flowing media from the stem and body material at all angles of valve disc seating. A secondary seal is achieved by an interference
fit of the stem and seat hole diameters.

DISC
Spherically machined and hand polished to provide a bubbletight shut off, minimum torque, and longer seat life. Standard material is Nylon 11 coated ductile Iron. Other materials available on request.

Technical Information*