YOKOGAWA VY Series User Manual

● Required straight pipe lengths and recommendations (1)
D: Nominal diameter of vortex owmeter (mm)
Description Figure
● Reduction pipe
Ensure that the upstream straight pipe length is 5D or more,
and the downstream straight pipe length is 5D or more.
Vortex Flowmeter
Flow
5D or more
Reduction pipe
5D or more
● Expansion pipe
Ensure that the upstream straight pipe length is 10D or more, and
the downstream straight pipe length is 5D or more.
Vortex Flowmeter
Flow
10D or more
Expansion pipe
5D or more
● Bent pipe
Ensure that the upstream straight pipe length is 10D or more, and
the downstream straight pipe length is 5D or more.
1. Single bend pipe
2. Double bend pipe, coplanar
3. Double bend pipe, non coplanar
1.
2.
3.
Vortex Flowmeter
Flow
10D or more 5D or more
Vortex Flowmeter
Flow
10D or more 5D or more
Vortex Flowmeter
Flow
20D or more 5D or more
● Valve position and straight pipe length
1. Install the valve on the downstream side of the vortex owmeter.
Read the information above for the upstream straight pipe length
depending on the conditions, and ensure that the downstream
straight pipe length is 5D or more.
2. If the valve needs to be installed on the upstream of the vortex
owmeter, ensure that the upstream straight pipe length is 20D or
more, and the downstream straight pipe length is 5D or more.
Vortex Flowmeter
Flow
Flow
Vortex Flowmeter
Valve
Valve
5D or more
20D or more
5D or more
1.
2.
Length is
based on
conditions
<3. Installation>
12
IM 01F07A01-01EN

YOKOGAWA VY Series Specifications

General

Brand	YOKOGAWA
Model	VY Series
Category	Measuring Instruments
Language	English