Page 89 - GRINNELL Mechanical Products Catalogue

vALvES
MATERIAL SPECIFICATIoNS Body
• Cast iron conforming to ASTM A 126, Class B
Body Seat (Liner)
• Grade E EPDM, grade T nitrile or fluoroelastomer
Body Coating
• Epoxy coated
Disc
• Stainless steel conforming to ASTM A 351, Grade CF8M
• Aluminium bronze conforming to ASTM B 148, C95400
• Ductile iron conforming to ASTM A 536, Grade 65-45-12
Drive and Bottom Shaft
Model 308 Butterfly Valves
5.0 4.0
3.0 2.0
1.0 0.9 0.8 0.7
0.6 0.5
0.4 0.3
0.2
0,300 0,200
0,100 0,090 0,080 0,070
0,060 0,050
0,040 0,030
0,020
0,010 0,009 0,008 0,007
20000 30000
50000 70000 100000
200000 300000
FLOW RATE IN LITRES PER MINUTE (LPM) (1 GPM = 3,785 LPM)
Gear operator
• Cast iron housing
(Page 2 of 2)
Tech Data Sheet: G320
• Stainless steel conforming to ASTM A 582, Type 416 or Stainless steel conforming to ASTM A 276, Type 316
upper and Lower Bearings
• Reinforced Teflon*
Plug
• Cast iron ASTM A 126
Seat Material
• Grade E EPDM – For service temperatures from -40°C to 110°C (-40°F to 230°F) . Recommended for water service, dilute acids, alkalies, oil-free air, and many chemical services . They are not recommended for use in petroleum services .
• Grade T Nitrile – For service temperatures from -29°C to 82°C (-20°F to 180°F) . Recommended for petroleum products, air with oil vapours, vegetable oils, and mineral oils . They are not recommended for use in hot water services .
Contact GRINNELL Mechanical Products for specific recommendations on seat material .
Performance
0.1
3000 5000 7000 10000
Note:
For design purposes, a safety factor of 15% to 20% should be applied to the values in the above table.
20000 30000
FLOW RATE IN GALLONS PER MINUTE (GPM)
Refer to back cover for country-specific customer care numbers.
89
50000 70000 100000
* Teflon is an trademark of E.I. Dupont
14 INCH (DN350)
16 INCH (DN400) 18 INCH (DN450) 20 INCH (DN500)
24 INCH (DN600)
NOMINAL PRESSURE DROP
IN POUNDS PER SQUARE INCH (PSI)
NOMINAL PRESSURE DROP IN BAR (1 PSI = 0,06895 BAR)
ValVes