ASAHI AV VALVES Installation,Operation and Maintenance Manual
Constant Flow Valves
1
(1) General operating instructions
○
Operate the valve within the pressure Vs temperature range.
（
The valve can be damaged by operating beyond the allowable range.
）
○
Select a valve material that is compatible with the media, refer to “CHEMICAL RESISTANCE ON
ASAHI AV VALVE”.
（
Some chemicals may damage incompatible valve materials.
）
○
The valve is not designed to bear any kind of external load. Never stand on or place anything heavy on the
valve at anytime.
○
When the valve is disposed of, contact waste disposal specialist.
(The valve generates toxic gas.)
○
Do not store or install the valve near any heat source or hot surface.
(It may cause deformation, destruction, and fire.)
○
The valve should be installed at place where space for periodic inspection & maintenance is sufficient.
○
The flow rate scale of the opening indicator has already been adjusted before the products shipped so
that the differences between reading and actual values meet the standard accuracy within
±
6% of full
scale.
○
Regardless of horizontal installation or vertical installation, the strainer with the 60-mesh should be
installed in the upper stream line of the valve in order to avoid the malfunction possibility caused by
clogging of the foreign matters.
Do not set the configuration as shown in the drawing-1, because it may malfunction.
(Other than ultra pure water lines.)
○
Every type of valve has its one flow direction across the valve.
Make sure, therefore, that the flow direction is consistent with the arrow-mark indicated on the valve
body when installed.
○
Do not use the valve for the fluid having a viscosity
of more than 30cp.
○
Regarding Specific Gravity, it should be less than 1.4
at the size of 15mm (1/2”) to 80mm (3”) and less
than 1.1 at 100mm (4”).
Drawing - 1
×
Caution