ANTI-SYPHON VALVE

APPLICATION

• This anti-syphon valve is designed to prevent product syphoning in an aboveground storage tank and to stop the fuel leaking in case of a break in the pipework, thus preventing environmental pollution and
• fire hazards.
• The valve is only intended for installation on top of aboveground tanks. The springs are used for hydrostatic
• heads: 1-5’, 6-10’, 11-15’ or 16-20’ (1,5, 3, 4,5, 6 meters)

INSTALLATION AND ADJUSTMENT

• the valve is installed at the highest point of the tank, normally on the manhole cover.
• First be aware that the system is drained.
• Determine the height of the system and the correct spring to use (see Color Spring Instructions below).
• Once the correct spring is selected place it over poppet shaft. 
• Apply sealant to the threads including the covering plug.
• While screwing the plug be careful to put brass poppet guide over poppet shaft while tightening down.
• Tighten with pipe wrench after making sure that an airtight seal has been reached.
• Do not overtighten.

MAINTENANCE

• Where working conditions may require it, the valves should be inspected periodically.
• Remove dirt particles where present. If the poppet seems to be damaged or pitted it has to be replaced by a new one together with the gasket.