Sheet 1597-1 Page 2
R947-3010 ¾ " R947-3010 ½ "
R947-3020 y" R947-3020 2 "
R947-3020 1 ¼ " R947-3020 1 "
100 90 80 70
60 50 40
30
20
10 9 8 7 6
5 4
3
2
1,0
100
200
400 600 1,000
2,000
4,000 6,000 10,000
20,000
Flow (cfh) of natural gas sp. gr. 0.65 at 60 F
INSTALLATION
• Read these instructions carefully. • Failure to follow them and/or improper installation may cause explosion, property damage, and injuries. • Installation must be done with the supervision of a licensed burner technician. • The system must meet all applicable national and local code re- quirements. • Check the ratings given in the specifications and on the Double Shutoff Valve to make sure that it is suitable for your application. • Never perform work if gas pressure or power is applied, or in the presence of an open flame. • Protect surfaces. Make sure that seals and O-rings are clean and in good condition. • Once installed, perform a complete checkout including a gas leak test. • Label all wires prior to disconnection when servicing the Double Shutoff Valve. Wiring errors can cause improper and dangerous operation. • Verify proper operation after servicing. • The main gas supply must be shut off before starting the installa- tion. • Examine the Double Shutoff Valve for shipping damage. • The inside of the Double Shutoff Valve, the flanges, and piping must be clean and free of dirt. • Remove all dirt and debris before installing the Double Shutoff Valve. Failure to remove dirt/debris could result in valve damage or improper performance.
RECOMMENDED PROCEDURE TO MOUNT THE FLANGES • Use new, properly reamed and threaded pipe free of chips. • Apply good quality pipe sealant, putting a moderate amount on the male threads only. If pipe sealant lodges on the valve seat, it will prevent proper operation. If using LP gas, use pipe sealant rated for use with LP gas. • Do not thread pipe too far. Valve distortion and/or malfunction may result from excess pipe in the Double Shutoff Valve body. • Apply counter pressure when screwing the pipe into the flanges. • Apply a parallel jaw wrench only to the flats on the flange. • Do not overtighten the pipe. Follow the maximum torque values listed below.
NPT pipe size
½"
¾"
1"
1 ¼"
1 ½"
2"
torque (lb-in.)
375 560 750 875
940 1190
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