| 摘要 |
A proportional control types safety device for controlling expansion pressure of closed pipe with heat coil is provided to prevent leakage in pipe and protect a pipe from expansion pressure of thermal medium fluid such as water in a boiler, steeped in thermal medium fluid. A proportional control types safety device for controlling expansion pressure of closed pipe with heat coil comprises a case(100) where thermal medium fluid(900) is stored inside, in which top has an air outlet on its one side; a lower water level sensor(200) detecting the water level inside the case; a water level meter outer case in which a float installation space is formed; a float moving up and down according to buoyance force; a water level meter inner case of which lower part is fitted into the installation space of the float; an air circulation device which allowing air entered into an air circulation hole and a compressive ball storage space to be drained through an air drain channel; and a valve opening and shutting the air drain channel of the air circulation device. |
