4
Pipe Arrangement
・
The maximum torque allowances when tightening the screws for the Trochoid
pump's pipe connections are as shown in the table below.
Caution:
The pump bore may get damaged if these values are exceeded.
Caution:
The use of seal tape or liquid sealants may result in reduced
frictional resistance and over tightening, which in turn could
damage the pump bore.
●
Pipe Connections
・
Make sure that the pipe connections are securely tightened and completely
sealed to prevent leaks or intake of air.
・
Always be sure to use pipe supports so that the pipes are self-supported and will
not place any weight on the pump.
・
Make sure that the pipe lengths and angles are correct when connected so that
no unnecessary strain is placed on the pump.
・
A pressure gauge should be installed so that pump conditions can be easily
monitored.
・
Stop valves, union jacks and some other couplings should be used to make
pump maintenance easier.
・
When handling oils with high viscosities, select pipes with diameters bigger than
the pump to minimize pressure loss.
・
Some of the high-pressure hoses and other parts have narrow internal
diameters. Therefore, be sure to check not only the inner diameter of screw-in
sections, but the whole area of the pipe as well before use.
・
It is recommended that an air vent valve in discharge line and additional priming
hole in suction line be provided to prevent possible startup troubles.
●
Types of Pipes and Couplings
・
All pipes must be cleaned thoroughly before connected to the pump. Some
pipes may have dust from storage or threading debris remaining inside. Be sure
to flush out all pipes to ensure that they are thoroughly clean before use.
Caution:
The pump and connected equipment may become damaged if the
pipes are not adequately clean.
Caution:
Do not attempt to flush the pipes after attaching to the pump.
Caution:
Test the pipes for air tightness before installing the pump.
Diameter Rc
1/8
1/4
3/8
1/2
3/4
1
1-1/4
1-1/2
Torque N・m
10
20
20
25
30
70
80
90
