Manually operated electrically Trip type valves, Type SGR, are suitable for closing within 1-second time. Valve does not open, even through the power supply is restored.
Size: - from ½" (15 MM) to 4" (100 MM) are available in Screwed / Flanged design. The larger sizes are supplied with lever mechanism, for opening of the valve. The maximum working pressure 500 mbar. For large size valves, it is essential to introduce small ½" size valve in parallel with the main valve and to be operated before attempting opening of main valve. This relieves pressure on the main valve body, making it easy to operate.