With the highest partner category of GESTRA AG, we operate throughout Germany as a provider of engineering services and complete solutions and are experts in customized solutions. As a customer you also benefit from the technology partnership and receive exclusive advantages: for example, you can obtain valves with pressure ratings from PN63 upwards, thermotechnical apparatus and vessels or control valves from PN40 upwards. We are directly available with the technical expertise of all GESTRA products and solutions, which means faster communication channels for you. In order to guarantee you short delivery times and high availability, we keep an extensive stock of GESTRA products at your disposal. Our expertise is also available to you on site.

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Suitable for differential pressure up to bar Able to cope with the harshest operating conditions Any installation position — in horizontal or vertical pipes Inner parts made of corrosion-resistant stainless steel Can be serviced without removing the body from the pipe Metal base bushing provides the seal between the body and bimetallic regulator Stage nozzle for non-return valve action Wear-resistant Method of operation The steam trap is fully open when the system starts up.

Cold condensate and air are discharged. The opening and closing process is controlled by the interaction of the stage nozzle and the temperature sensor, which consists of duo stainless steel plates. When the system starts up and on the formation of cold condensate and air, the duo stainless steel plates lie flat.

The operating pressure acts in the direction of opening, so that the valve is opened fully. As the temperature of the condensate rises, the bimetallic plates deflect and pull the stage nozzle in the closing direction. As the temperature of the condensate rises, the duo stainless steel plates deflect and pull the stage nozzle in the closing direction. Acting against this thermal process is the operating pressure and pressure that builds up in the chamber of the stage nozzle due to flash steam thermodynamic process.

This state of equilibrium between the temperature-induced closing and pressure-induced opening forces determines the outlet cross section. Just below saturation temperature, the bimetallic plates are deflected to such an extent that the orifice is almost closed. Immediately below saturation temperature boiling point , the duo stainless steel plates are deflected to such an extent that the orifice is almost completely closed.

The pressure in the stage nozzle chamber therefore drops and, as the amount of flash steam declines, dissipates altogether. The orifice closes. However, the temperature-induced deflection of the duo stainless steel plates is not sufficient to generate the required force to counter the valve force acting on the nozzle needle in the opening direction throughout the entire operating range.

Therefore, the column of these plates consists of a spring with a characteristic that is adapted to the valve force, which changes under pressure. This way, thermal and spring properties are coordinated in such a way that the opening and closing temperatures are always just a few degrees below boiling point.


Thermostatic steam traps BK 45/46



Thermostatic Steam Traps BK


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