The Fig. #10 BTFV is for use inside the tank only. It has earned and enjoys the enviable reputation of being the accepted float valve: for general tank service in the building industry, for use by primary manufacturers as an essential part of their equipment, and for all other industrial uses where valve and float are located inside the tank. It is the standard valve for controlling liquid levels where pressures do not exceed 75 psi on valve sizes ½" to 4" inclusive.
It is manufactured in sizes ½" to 4" inclusive. The ½" to 3" models are all bronze with screwed ends. The 4" model is made of bronze and comes with either screwed or flanged ends. All valves are sold complete with floats and rods. Adjustable float position is attainable with a two piece lever design. An approximate 45 degree angle on the float rod makes the best operational position. On all sizes, the travel of the piston is at least one third of the pipe size, and the seat of the valve is full pipe size assuring full flow capacity. On sizes ½" to 4" inclusive, the bonnet is screwed into the valve body.
This is a direct acting, float actuated valve, without auxiliary pilot or other supersensitive parts. Only two wearing parts: a cup washer and a disc seat assure inexpensive service. Positive Shut-Off is a reality with this single seated balanced design.
Size: ½" - 4" Fig. #10
Below is a simple drawing of where you should place air vent holes on the hush pipe leading from the discharge of a Ford #10 Balanced Tank Float Valve. The air vent holes should be no more than 1 inch from the float valve discharge (4 to 6 holes evenly spaces around the hushpipe should be sufficient). The diameter of the air vent holes should be no larger than either 3/16" to 1/4". Please note that the optimum position for the placement of the float valve is approximately 1 foot above the tank's nominal water level.
Finally, the only lubricant to be used with the Ford Balanced Tank Float Valve is dry graphite.
In the water supply of the above building, prevention of roof tank overflow and water level control of both receiving and roof tanks is an item of first importance.
Specify- the FORD Balanced Tank Float Valve, FIG. #10 to be installed in pump discharge line at the roof tank over arid above the float switch level (as shown in this illustration). In the receiving tank, the float valve is installed as shown, to control street supply. The installation is insurance against overflow.
The FORD Balance Tank Float Valve, FIG. #10 covers all requirements for a high grade reliable float valve; manufactured right here in New York for the past 130 years. Spare parts are always in stock.