Honeywell 9410 Series Installation, Operation & Maintenance Manual page 8

♣ NOTE
To maintain a constant pressure at the entrance for all tracks of the valve, the straight pipe length at the
valve entrance must be at least 10 to 20 times the pipe diameter. For the fluid to maintain the specified
pressure after passing the valve and to prevent noise or vibration by turbulent flow, the straight pipe length
at the valve exit must be at least 3 to 5 times the pipe diameter. Straight piping at the entrance and exit
allows the preservation of accurate operation status by enabling accurate measurement of the pressure at
the entrance and exit. (See Fig 3.7)
Pipe Dia. x 13
Pipe Dia. x 4
배관구경 x 13 배관구경 x 4
Pipe Dia. x 16
Pipe Dia. x 5
배관구경 x 16 배관구경 x 5
Fig 3.7 Minimum straight pipe length for valve performance and pressure measurement
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