Grande - Model TRU-FLO - Compact Sewer Flow Regulator Systems
The TRU-FLO Compact Regulator System is designed to maintain a constant and accurate flow (+/- 5%) from a minimum of 160 gpm (10 L/s) to a maximum of 7 100 gpm (450 L/s) for upstream water levels varying from 0 to 26 feet (8 m). The TRU-FLO Compact Regulator has been used for flow control in combined sewer systems (CSO), sanitary sewer systems (SSO) and effluent from batch process plants and is well suited to regulate small to medium discharges. The TRU-FLO Compact Regulator is installed upstream of the control point in a wet well or directly in the storage area thereby not requiring the construction of a separate structure. The TRU-FLO Compact Regulator requires no differential head for proper operation.
- 160 gpm to 7 100 gpm (10 to 450 L/S)
- Headwater up to 26 feet (8 m)
- No separate structure required
- No floor invert offset required
- Designed to operate under submerged conditions
- Automatic self-flushing effect prevents blockage
- Design discharge can be adjusted on site
- Shipped ready to install
- Easy to retrofit into existing installations
- Stainless steel construction
The TRU-FLO Compact Regulator System can vary from a model GTF-R-15 to GTF-R-50. The GTF-R-15 has an inlet diameter of 6 inches (15 cm) with a flow range of 160 to 400 gpm (10 to 25 L/s) and the GTF-R-50 has an inlet diameter of 20 inches (50 cm) with a flow range of 3 200 to 7 100 gpm (200 to 450 L/s). The TRU-FLO’s model selection is based entirely on the flow range required.
The TRU-FLO Compact Regulator maintains a constant discharge at a set value independent of the upstream water level. The TRU-FLO Compact Regulator is installed in the structure’s wet well and is acted upon by the upstream water level. During low flow periods, the pivoted radial gate remains in the fully open position. The compact design consists of an integral float housed in a watertight enclosure which controls the position of the pivoted radial gate. Because of this watertight enclosure, the large variation in the upstream water level is reflected over a much smaller range within the housing. The position of the float within this housing determines the position of the radial gate and consequently the size of the regulator opening. This ensures a constant discharge over the entire range of the upstream water level.
The TRU-FLO Compact Regulator has an automatic self-flushing effect to prevent blockage. If a blockage occurs, then the flow through the regulator decreases and the resulting force of the water on the debris pushes the radial gate. This causes the radial gate to open fully. This flushes the blockage out under the pressure of the upstream water level after which the regulating process resumes.
Each TRU-FLO Compact Regulator is calibrated on a fully functional, full scale test stand. Each TRU-FLO Compact Regulator is shipped to site pre-set to the desired design flow. In addition, set points are clearly indicated for future in-situ flow adjustments (should it be required). The regulator can then be installed and put into operation without requiring time consuming and cost intensive in-situ flow calibration or measurement.