The automatic siphon system stores liquid in a tank until a certain elevation of the liquid is reached (the high water line), and then the siphon automatically comes into operation and rapidly drains the tank to the low water line. When the low water line is reached, the siphon shuts off and stops the flow of liquid.
All liquid coming into the tank will again be stored until the high water line is reached and the siphon repeats the cycle. This is accomplished with no moving parts. The siphon operates on the hydraulic force of the liquid rising in the dosing tank.
Materials of Construction
The Fluid Dynamic Automatic Siphon is manufactured from chemical resistant materials which are unaffected by the fluids found in domestic sewage. They are immune to sewer gases and the sulfuric acid generated by completion of the hydrogen sulfide cycle. The siphon traps and bells are molded, one piece each, from black high density polyethylene. Polyethylene cannot be solvent welded. The outlet can be connected to an SDR 35 gasketed pipe tee. The vent piping is constructed from schedule 40 PVC pipe and fittings. The bolts are stainless steel.
Determining the Volume of Liquid Dosed by the Siphon
The volume of liquid dosed by the siphon is a function of the area of the tank and the drawdown of the siphon.
Example 1: To figure the volume of dose of a Model 417 siphon (17" drawdown) placed in a rectangular tank with inside dimensions of 4' x 5': Step 1, Figure the area of the tank in square inches, 48"x60"=2880 inch squared Step 2, Figure the volume in cubic inches (The drawdown of the siphon x the area of the tank), 17x2880=48,960 inch cubed Step 3, Convert to cubic feet (divide by 1728), 48,960/1728=28.33 feet cubed Step 4, Convert cubic feet to gallons (there are approximately 7.48 gallons in a cubic foot), 28.33x7.48=211.93 gallons
Further Information
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