The steam trap is an automatic valve. It is more suitable for the steaming plant of low pressure, low displacement, high requirement of temperature stability and not with the condensing water . The work principle This product basis on buoyancy principle. It causes the float ball in the valve to make vibratory movement along with the water level change, to achieve the valve open and shut namely row of water resistance steam function. Features 1.can continuously drain water ,stable performance, big displacement , and little water leakage. 2.can continuously drain saturated water ,to causes less condensed water leaving in the equipment, elevate temperature quickly , the heating temperature is stable. 3.with automatism row cold air device , does not have the phenomenon of air lock, can work balance without noise.