LOW PRESSURE ACTUATOR FOR DRY SPRINKLER SYSTEM
    7.
    发明公开
    LOW PRESSURE ACTUATOR FOR DRY SPRINKLER SYSTEM 审中-公开
    低压控制器成员TROCKENSPRINKLERANLAGE

    公开(公告)号:EP1268004A2

    公开(公告)日:2003-01-02

    申请号:EP01918861.4

    申请日:2001-03-20

    IPC分类号: A62C35/62 A62C35/66

    摘要: A low-pressure actuator (1) for use in a dry, low-pressure, pressurized-gas, fire control and suppression sprinkler system for delivering an extinguishing liquid to a fire is disclosed. The device is actuated by a rapid fall in the system gas pressure, whereupon it allows liquid to flow through to a sprinkler check valve, which, in turn, is actuated and provides liquid flow for distribution through a piping system to a plurality of interconnected sprinklers. One embodiment of the device includes a first diaphragm (18) which acts as a gas-liquid barrier, and a second diaphragm (23), which acts as a liquid flow barrier. When gas pressure in the sprinkler system drops below a predetermined set point, pressure equilibrium on the first diaphragm is upset causing the first diaphragm to move and allow a priming flow of liquid to the liquid outlet through a liquid by-pass (13), which is otherwise sealed. This also simultaneously causes the second diaphragm to move and allow a greater flow of liquid, which provides the main extinguishing liquid, to the liquid outlet. Embodiments of a low-pressure actuator with a pneumatic/electric double interlock (51, 52, 53, 54) system, which requires that two separate events, such as discharging air pressure from the sprinkler system, and an electrical detection, must occur in order for the sprinkler control valve to activate and allow water into the sprinkler system, wherein the low-pressure actuator further includes an electrical detector and a solenoid coil assembly, are also disclosed.