Changeover System Overview
Changeover System have function and specification as below :
- Designed for non-stop gas supply situation, can be switched automatically;
- Compact design;
- Max Inlet pressure: 300bar;
- Equipped with high pressure vent valve to exhaust the remaining pressure to guarantee the safety when changing to new source of gas supply
- Equipped with high pressure diaphragm type check valve and viewing window to locate “Open” and “Close”
- Clearly marking on Aluminum panel for easy operation
FDR-1L Series without line pressure regulator Changeover System
- FDR-1L series combines the FCR-1 series with diaphragm valves and pressure gauges.
- It has a regulator of adjustable outlet pressure and a regulator with fixed outlet pressure.
- The outlet pressure range is fix and not adjustable.
Changeover System – Operation Overview
- 1 – Open the 2 inlets at the same time. The one side that the “IN SERVICE” arrow pointing at would be the 1st source for gas supply.
Fig. 1 When the “In Service” arrow pointing at side B, side B would be the gas source because at this time, the fixed outlet pressure of side B is higher than the set pressure of side A. Consequently, the diaphragm of side A regulator is off from the stem to close the regulator.
Fig. 2 Basing on the same principle, when the “In Service” arrow pointing at side A, side A would be the gas source.
- 2-Automaticly change to another side when gas source of one side depleted.
Fig. 3 When “In Serve” arrow is pointing at side B but gas source of side B is depleted, its outlet pressure shall decrease to be lower than the set pressure of side A. By the force of spring, side A regulator shall be open to begin gas supply. Meanwhile, gas from side A shall flow into side B. At this moment, before replacing new gas source of side B, the check valve should be first turned off, with the vent valve open to exhaust remaining pressure. After replacement, if the “In Serve” allow still points at side B, side B would be the gas source. If the arrow is turn towards side A, side A would then be the gas source.
FDR-1T Series With line pressure regulator Changeover System
- FDR-1T series combines FCR-1 series, FLR-1series with diaphragm valve and pressure gauge.
- It has a double-stage regulator and an adjustable regulator.
- Outlet pressure ranges from 0 to 10 bar.
- Its working principle is similar to FDR-1L series.
Please see our product FITOK Changeover System
