Dole Flow Controls

Dole Flow Regulators are highly engineered products that can save a considerable amount of water when used in domestic water supply systems. Properly regulated consumption of water can save on both heating and water bills for the average home owner.

One of the many models of flow regulators Invensys offers is the FRS model, which is commonly used in conjunction with lavatory and shower fixtures. This Dole flow regulator is a simple, self-cleaning device designed to deliver a constant volume of water flow output over a wide pressure drop range. 

The controlling mechanism is a flexible orifice which begins to distort above the threshold pressure. As pressure increases, the orifice area decreases and maintains the desired flow output. At pressures below the threshold point of 15-20PSI, the flexible insert acts as a fixed orifice. Another advantage to this device is that it may break up the water discharge pattern, which in turn would minimize the audible sound developed when water passes through the regulator. 

Each FRS model flow regulator has a serviceable screen, as shown. Flow tolerance is approximately +/- 15% for flow rates above 0.50GPM. The internal flow washer material in most models is Ethylene Propylene (EP). When ordering, please specify the flow rate you require.

The Dole Flow Regulator is self-cleaning and designed to deliver a constant volume of water flow output over a wide pressure drop range. The controlling mechanism is a flexible orifice that varies its effective area inversely to the applied pressure. Below the threshold pressure the insert acts as a fixed orifice. Above the threshold point, the insert begins to distort reducing the orifice area to maintain the desired output. Flow rates will be maintained to within ±15% up to a pressure drop of 125 PSI. The rate varies due to manufacturing tolerances and water temperatures.

The regulators are designed for a maximum system pressure of 200 PSI. Multi-orifice flow inserts are used, where possible, in regulators with rates between 1 GPM and 4 GPM. The insert breaks up the water discharge pattern to minimize the sound made when water passes through restriction.