75
ASX 176
Use, maintenance and warning instructions
HIGH PRESSURE REGULATOR
|
INSTALLATION
|
REV. 00
EN
6.5.3 - CONNECTION OF THE SENSING LINES TO THE DOWNSTREAM PIPING
Fig. 6.21.
Connection of sensing lines to the downstream piping
For proper adjustment, it is essential that:
• the downstream shut-off valve is placed at a distance of at least 6 times the nominal diameter of the pipe downstream
of the regulator;
• the downstream sensing lines are placed on a straight section of pipe (with uniform diameter) having a length equal to
at least 4 times the nominal diameter of the piping itself;
• the velocity of the pressurised fluid at the sampling point does not exceed the following values:
Vmax = 30 m/s for Pa > 5 bar
Vmax = 25 m/s for Pa < 5 bar
To calculate the flow rate, use the following formula:
= 345,92
2
1 − 0,002
1 +
V =
gas velocity in m/sec
Q =
gas flow rate Stm³/h
DN =
nominal diameter of the regulator in mm
Pd =
regulator outlet pressure in barg
NOTICE!
All pneumatic connections to be made on site must have a minimum internal diameter of 8 mm.
Summary of Contents for ASX 176
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