| |
| ¡¡How to Select Right Installing Site |
| |
It is very important to select proper place for meter installation and install it correctly, otherwise it will affect meter accuracy or even damage meter. For convenient installation and maintenance, flexible pipe could be installed downstream flowmeter.
|
| ¡¡Requirement for Straight Pipe |
| This flowmeter requires specific straight pipe for upstream and downstream, or accuracy won¡¯t be exactly right. |
The length of straight pipe ¡Ý 15D for upstream
and ¡Ý5D for downstream if converging pipe £¾15¡ã
is used in upstream of transducer installing site.
|
 |
The length of straight pipe ¡Ý 18D for upstream
and ¡Ý5D for downstream if diverging pipe£¾15¡ã
is used in upstream of transducer installing site.
|
 |
The length of straight pipe ¡Ý 20D for upstream and
¡Ý5D for downstream if 90¡ãelbow or T joint
is used in upstream of transducer installing site.
|
 |
The length of straight pipe ¡Ý 25D for upstream and
¡Ý5D for downstream if two 90¡ãelbows on same
plane in upstream.
|
 |
The length of straight pipe ¡Ý 40D for upstream and
¡Ý5D for downstream if two 90¡ãelbows on different
planes in upstream.
|
 |
Flow or pressure control valve should be installed
at least 5D far away from the meter in downstream
as possible, if these valves must be installed in the upstream, ensure ¡Ý50D for upstream at least and ¡Ý5D for downstream.
|
 |
|
CAUTION:
1. If there is a valve equipped near the site of meter installed in upstream, often open or close the valve will affect meter working life and even cause permanent meter damage.
2. Avoid transducer installed in much long overhead pipe, otherwise leakage will happen between transducer and flange caused by transducer drooping. If can not avoid, fitting device for pipe must be used at the 2D on both side of meter.
|
| |
| ¡¡ Requirement for Companion Pipe |
Straight pipe must be exactly required upstream and downstream of flowmeter installing site, or measuring accuracy will be affected.
¡ñ The inside diameter of companion pipe for upstream and downstream should be the same as nominal diameter of flowmeter, and should meet requirements as below: |
| 0.98DN¡ÜD¡Ü1.05DN |
| Thereinto£º |
DN----------nominal diameter of the flowmeter
D----------inside diameter of the companion pipe |
|
¡ñ Companion pipe should be concentric to flowmeter, and coaxial offset should not be more than 0.05DN.
¡ñ Sealing gasket between flange and transducer cannot be protruded into the pipe, and its ID can be slightly bigger than that of transducer. |
| |
|
| ¡¡Requirement for By-pass Pipe |
| For convenient maintenance, it had better install a by-pass pipe for transducer. In addition, in pipeline needed cleaning or if the fluid in pipeline cannot be shut down for meter checking, the by-pass pipe must be mounted. |
 |
| |
| |
| ¡¡Requirement for Pipe Vibration |
| |
|
| Avoid transducer being installed on the pipe with
strong vibration, if you have to installed,
vibration damping measures should be used.
Install fitting device at 2D far away from the
flowmeter on both side of upstream & downstream
and vibration pad should be used too.
|
 |
| |
| |
| |
| Next |
¡¡
