Wrist Action Shaking Machine Suppliers & Manufacturers

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  • Pre-action Fire Sprinkler Systems

    Pre-action fire sprinkler systems employ the basic concept of a dry pipe system in that water is not normally contained within the pipes. The difference, however, is that water is held from piping by an electrically operated valve, known as a pre-action valve. Valve operation is controlled by independent flame, heat, or smoke detection. 

  • Pre Action System

    In a pre-action system the piping is pressurized with air or nitrogen, monitoring of this air pressure provides a means of supervising the system piping. Loss of the supervisory air pressure in the system piping results in a trouble signal at the alarm panel. A prealarm of a possible fire allows time for alternate fire extinguishment prior to a sprinkler discharge. In the event the fire cannot otherwise be extinguish