30
www.Daniel.com
SPRING LOADED BACK PRESSURE VALVE
4
Installation prerequisites
4.1
Pre-start checks
Ensure that the pipeline is completely free of all foreign material before installing the
valve. The design of the control valve has not been assessed for the effects of traffic, wind
or earthquake loading. Provide fire prevention measures and equipment per local
regulations.
4.2
Torque information
NOTICE
When installing the control valve, ensure that the bolts conform to the requirements of
ASME B16.5 paragraph 5.3 and to the material requirements of ASME B16.5 Table 1B.
Gaskets must conform to the requirements of ASME B16.20.
Tightening procedure:
1. Lubricate the nuts and bolts.
2. Hand-tighten until the nuts and bolts are snug against the flanges.
3. Use the minimum pressure setting on an air wrench.
4. Use the correct tightening sequence for the bolt flanges.
5. Follow your company's internal flange installation procedures.
Important
Ensure that piping or other attachments connected to the control valve are not under
stress.
Important
Provide fire prevention measures and equipment per local regulations.
Flanges with 4 and 8 bolts
•
First round - 30% of final torque (flange sequential order)
•
Second round- 60% of final torque (flange sequential order)
•
Third round - 100% of final torque (flange sequential order)
•
One final time - clockwise or counter clockwise sequentially around the flange
User manual
Installation prerequisites
DAN-20064957
August 2019
User manual
37
