SR0033424_ENG DESIGNED PLAN - Laserfiche WebLink

Home Browse Search

GEOFLOW, INC *, http://www.geoll .com/wastewater/Operations%20a... 5. SUPPLY MANIFOLD This carries the water from the dosing tank to the dispersal area. Rigid PVC is usually used and must be designed to slope back to the pump tank in freezing conditions. The velocity in the manifold should be between 2 feet per second and 5 feet per second (fps). Refer to PVC pipe sizing chart in the appendix to determine the best diameter for your application. 5. RETURN MANIFOLD In order to help clean the system, the ends of the drip lines are connected together into a common return line, most often made of rigid PVC. This line will help equalize pressures in the system. Flushing should be done frequently during the installation period. Periodic flushing under full system pressure will guarantee a long system life. The return manifold should be installed to drain the line back to the pretreatment tank in freezing climates. 7. PRESSURE REGULATOR Pressure regulators fix the inlet pressure at a given rate and are.recommended with ` WASTEFLOW Classic. Under normal operating conditions, pressure in the drip lines should be: 10 psi to 45 psi for WASTEFLOW Classic and 7 psi to 60 psi for WASTEFLOW PC 8, 'AIR VACUUM BREAKER Au vacuum breakers are installed at the high points to keep soil from being sucked into the emitters due to back siphoning or backpressure. This is an absolute necessity with underground drip systems. They are also used for proper draining of the supply and return manifolds in freezing conditions. Use one on the high end of the supply manifold and one on the high point of the return manifold. Additional. air vDts may be required depending on terrain Maximum flow per vacuum breaker is 50 gpm. Freezing conditions require the air vacuum breaker be protected !+ with insulation. Air Vacuum Specification The air vacuum relief valve provides instant and continuous vacuum relief and non-continuous air relief. Both the body and the removable dirt cover shall be constructed of molded plastic. The body and the dirt cover shall be connected with a 3/4 inch hose thread. The ball shall be constructed of lov density plastic and the internal seat shall he constructed of vinyl The air vacuum relief valve shall seal at 5 psi. Inlet size shall be a 1-inch male pipe thread. The air vent shall be Geoiozv item number A.PVBK 1 1 3 of 12