Page 77 - GRINNELL Mechanical Grooved Piping Products EMEA

Valves and Accessories
Model B303 Grooved End Butterfly Valves Gear and Lever-Lock Operators
Tech Data Sheet: G315
The GRINNELL Model B303 Butterfly Valves provide for efficient control in piping systems of on/off or throttling/balancing service, fluid flow, and bubble-tight shut-off. 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.
Flow may be from either direction and the valve may be positioned in any orientation. 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 ranges. Contact your GRINNELL Representative for specific recommendations on seal and coating selections.
Approvals
• The Model B303 Butterfly Valves conform to MSS SP-67.
Maximum Working Pressure
• 50 to 200mm (2" to 8"): 20,7 bar (300 psi)
• 250 to 300mm (10" to 12"): 12 bar (175 psi)
Body:
• Ductile Iron conforming to ASTM A 536, Grade 65-45-12.
Body Coating:
• Nylon: Rilson Pine Powder (PA11), Black Disc:
• Ductile Iron conforming to ASTM A 395, Grade 60-40-18
Upper and Lower Stem:
• Type 410 Stainless Steel conforming to ASTM A479
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Lever-Lock Gear Operator Operator
Lever-Lock Operator:
• HandlePolymer-Coated Iron
• Lever-Lock Zinc-Plated Steel • Throttling Plate Zinc-Plated Steel
Gear Operator:
• 50 to 200mm (2" to 8"): bronze travelling nut gearbox in ductile iron housing.
• 250 to 300mm (10" to 12"): segmented gearbox in ductile iron housing.
Encapsulated Disc Material & Temperature Rating:
See chart below
Butterfly Valve Torque
• Pressure drop, contact a GRINNELL Sales Representative.
Performance
• Pressuredrop,contactaGRINNELLSalesRepresentative.
Grade “E” EPDM (a)
Grade “T” Nitrile (b)
Grade “O” Flouroelastomer (c)
-30°F to 230°F -34°C to 110°C
-20°F to 180°F -29°C to 82°C
-20°F to 200°F -29°C to 93°C
a. Recommended for hot water, dilute acids, alkalis, oil free air, and many chemical services not involving petroleum products. Not recommended for hydrocarbons or steam service.
b. Recommended for petroleum products, vegetable oils, mineral oils, and air with oils. High-end oil vapour temperature decreases to 150°F (66°C) Not recommended for hot water or hot dry air systems.
c. Recommended for oxidizing acids, petroleum products, hydraulic fluids, lubricants, halogenated
hydrocarbons. Not recommended for hot water.
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