ASAHIAVVALVES Installation,OperationandMaintenanceManual
Diaphragm Valves Type 14 True Union Diaphragm Valves Type14 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
VA LV E ” .
（Some chemicals may damage incompatible valve materials.）
○Bonnet bolt torque should be checked before installation, as they may become loose after long-term storage. A
periodic check of the valve condition as well as bonnet & flange bolt torque should be made part of preventative
maintenance program properly re-tightening the bolts as necessary. It is especially important to re-tighten all
bolts during the first shutdown.
(Refer to page 5.)
○The travel stop may have to be adjusted if media leakage is detected between the upstream & downstream sides
of the valve.
○Do not step on the valve or apply excessive weight on valve. (It can be damaged.)
○ Do not exert excessive force in closing or opening the valve.
○ Make sure to consult a waste treatment dealer to dispose of the valves.
(Poisonous gas is generated when the valve is burned improperly.)
○Allow sufficient space for maintenance and inspection.
○Keep the valve away from excessive heat or fire. (It can be deformed, or destroyed.)
○The valve should be operated by hand.
(2) General instructions for transportation, unpacking and strange
○Keep the valve packed in the carton or box as delivered until installation.
○Keep the valve away from coal tar, creosote (antiseptic for wood ), termite insecticide, vermicides, and paint.
（The could cause swelling and damage the valve.）
○Do not impact or drop the valve. (It can be damaged.)
○Avoid scratching the valve with any sharp object.
