Page 84 - GRINNELL Mechanical Products Catalogue

vALvES
Model B302 Grooved End Butterfly Valves
(Page 1 of 4)
Tech Data Sheet: G310
GRINNELL Model B302 Butterfly Valves are capable of pressures of 2,068 kPa (300 psi) for sizes 50mm – 200mm (2" – 8") and 1,379 kPa (200 psi) for sizes 250mm – 300mm (10" and 12") . The valves are designed for efficient control of: on/off or throttling/balancing service; fluid flow; and “bubble tight” shut-off in piping systems . Flow may be from either direction, and the valve may be positioned in any orientation . The valves are available with either a gear operator, for sizes 50mm – 300mm (2" – 12"), or lever-lock operator, for sizes 50mm – 200mm (2" – 8") . The valves are furnished with grooved ends for use with grooved couplings and can be easily adapted to flanged components utilising GRINNELL Figure 71 Class 150 Flange Adapters .
o-Ring
• EPDM or Buna-N
upper and Lower Stem
• Type 416 Stainless Steel ASTM A 582
Gear operator
• Cast iron housing
Lever-Lock operator
• Handle – Iron Polymer-Coated
• Lever-Lock – Steel Zinc-Plated
• Throttling Plate – Steel Zinc-Plated
Disc Seal Specifications Encapsulated Rubber
• EPDM – For service temperatures from -29°C to 121°C (-20°F to 250°F), intermittent service at
121°C (250°F) and continuous service at 107°C (225°F) . Recommended for hot water not to exceed
the temperature ratings above, plus a variety of dilute acids, alkalines, and many chemical services . They are not recommended for petroleum oil, strong acid, strong alkaline, or compressed air services .
• Nitrile – For service temperatures from -29°C to 82°C (-20°F to 180°F) . Recommended for solvents, oils, water, and hydraulic fluid resistance . They are not recommended for highly polar solvents such as acetone and methyl ethyl ketone, cholrinated hydrocarbons, ozone, or nitro hydrocarbons and some aviation fuels .
• Fluoroelastomer – For service temperatures -7°C to 149°C (+20°F to 300°F) . Recommended for oxidising acids, petroleum products, hydraulic fluids, lubricants, and halogenated hydrocarbons .
MATERIAL SPECIFICATIoNS Ductile Iron Body
• ASTM A 395 – Standard specification for ductile iron castings, Grade 60-40-18
• Tensile strength, minimum 413,685 kPa (60,000 psi) • Yield strength, minimum 275,790 kPa (40,000 psi) • Elongation in 50mm (2"), minimum 18%
Disc
• Ductile iron ASTM A 395 w/EPDM or Buna-N encapsulation
Body Coating
• Black Polymide-Coated
The body and disc construction provides for increased strength and durability . The disc seal and body coatings are compatible with a variety of chemicals and temperature range . (Contact GRINNELL Mechanical Products for specific recommendations on seal and coating selection) .
The Model B302 Butterfly Valve with Gear Operator is a self-locking worm gear type . It is equipped with adjustable stops at the open and shut positions .
The Model B302 Butterfly Valve with Lever-Lock
Operator has a throttling plate that provides throttling notches every 10° for manual control in balancing up to 90° or shut off service . The lever may be padlocked in any one of the positions, including opened or closed, by virtue of a locking hole located in the handle and lever .
Model B302 with Gear Operator
Model B302
with Lever-Lock Operator
84
www.grinnell.com
ValVes