HEADLOSS IN FEET OF WATER 10 3 20 30 40 50 60 70 80 100 200 300 400 500 600 700 800 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 100,000 3,000 4,000 5,000 6,000 7,000 8,000 10,000 20,000 300 400 500 600 700 800 1,000 2,000 30 40 50 60 70 80 100 200 4 5 6 7 8 10 20 METERS OF WATER Headloss Charts CUBIC METERS PER HOUR 7 6 5 4 3 2 1/2” 1” 11/2” 2” 21/2” 3” 4” 12 FEET/SECOND VELOCITY 1 .8 .7 .6 .5 .4 .3 .2 8 FEET/SECOND VELOCITY 5 FEET/SECOND VELOCITY 4 FEET/SECOND VELOCITY .1 10 FEET/SECOND VELOCITY 8” 6” 10” 12” 14” 16” 18” 20” 24” 30” 36” 42” 48” 54” .7 .8 1 .5 .6 .3 .4 .2 2 .08 .1 .04 .05 .06 .07 .03 Size 1/2-1 1 1/2 2 2 1/2 3 Cv 37 94 150 240 850 1,477 1,930 2,820 3,980 5,160 7,290 8,700 11,800 14,400 22,000 34,300 56,900 91,650 91,650 124,800 Flow Coefficients 4 FLOW OF WATER IN GALLONS PER MINUTE 6 8 10 12 14 16 18 20 24 30 36 42 48 54 Installation Instructions The installation of the valve is important for its proper operation. The valve is capable of flow in either direction but the maximum operating pressure can vary with the location of the seat end (Figure 5). The words “SEAT END” are marked on the valve flange. SUSPENDED SOLIDS SERVICE: For fluids containing suspended solids, special orientations are needed to prevent debris from collecting in the valve. For horizontal installations (Figure 6), the valve should be installed with the flow entering the seat end of the valve and the shaft in a horizontal position with the plug up when open. For vertical installations (Figure 7), the valve must be installed with the seat end up regardless of flow direction. CLEAN SERVICE: For both horizontal and vertical installations, install in the direct pressure orientation (pressure opposite the seat end). AIR AND GAS SERVICE: Install valve in the direct pressure orientation (pressure oppo- site the seat end). Lubricate plug face with FDA approved silicone grease such as Dow Corning #7 before installation. Gear actuators are required for gas service applications. PUMP DISCHARGE SERVICE: On all horizon- tal pump discharge applications, the seat end should be towards the pump. SEAT END BURIED SERVICE: Gear actuators are recommended for buried valves to hold the valve in position and provide multi-turn closure to prevent water hammer. The valve should be installed with the shaft horizontal and the actuator nut directed upwards. The valve box or extension pipe should be installed so that the actuator nut and extension stem turn freely. 6 UP DIRECT PRESSURE REVERSE PRESSURE SEAT END Figure 5. Installation Orientation UP HORIZONTAL SHAFT SETTLED SOLIDS SEAT END Figure 6. Horizontal Pipe w/Solids SETTLED SOLIDS FLOW Figure 7. Vertical Pipe with Solids SIZING RANGE TYPICAL