Gestra BK28 is a bimetallic-regulator thermostatic/thermodynamic steam trap. It features a 1.5415 steel body and a wear-resistant titanium-alloy valve seat, together with a corrosion-resistant and water-hammer-resistant Thermovit bimetallic regulator. The product supports flanged, socket-weld, and butt-weld connections, with a maximum allowable operating temperature of 530°C and a maximum allowable differential pressure of 85 barg. An integral strainer and integrated check-valve function are included. It is suitable for automatic condensate drainage, reverse-flow prevention, and thermodynamic venting in high-temperature, high-pressure steam pipelines and branch systems.
Product image of the Gestra BK28 bimetallic steam trap, three-quarter view
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BK28 Adjustable Bimetallic Steam Trap | Gestra
Adjustable bimetallic thermostatic/thermodynamic steam trap for draining high-temperature steam lines, available with flanged, butt-weld or socket-weld connections.
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Specifications
- Product type
- Bimetallic-regulator steam trap, thermostatic/thermodynamic type
- Nominal size
- DN15, DN20, DN25
- Connection type
- DIN flange (EN 1092-1), socket-weld end (DIN EN 12760), butt-weld end (DIN EN 12627)
- Nominal pressure rating
- Flange PN100
- Flanged connection pressure-temperature ratings
- Allowable operating pressure: 100 barg (20°C, 150°C), 94 barg (265°C), 80.9 barg (350°C), 73 barg (415°C), 44.2 barg (500°C)
- Welded connection pressure-temperature ratings
- Allowable operating pressure for butt-weld/socket-weld ends: 100 barg (20°C, 400°C, 450°C), 85 barg (470°C), 61 barg (500°C), 30.9 barg (530°C)
- Maximum allowable operating temperature
- Flanged connection: 500°C; butt-weld/socket-weld ends: 530°C
- Maximum allowable differential pressure
- 85 barg
- Body material
- Structural steel, material number 1.5415
- Body sealing material
- Graphite/CrNi, asbestos-free
- Regulator material and design
- Corrosion-resistant and water-hammer-resistant Thermovit® bimetallic regulator
- Valve seat and nozzle-stem material
- Wear-resistant titanium alloy
- Functional configuration
- Integral strainer, integrated check-valve function, automatic venting and thermodynamic venting
- Installation position
- Can be installed in any position
Application scenarios
Condensate drainage and automatic venting in high-temperature, high-pressure steam systems
Used for automatic condensate and air discharge in high-temperature, high-pressure steam systems. BK28 is a bimetallic-regulator steam trap with automatic and thermodynamic venting functions, suitable for steam-system operating conditions within its allowable pressure, temperature, and differential-pressure ranges.
Condensate drainage and reverse-flow prevention in steam pipelines and branch systems
Used for automatic condensate discharge in steam pipelines, branches, or headers. BK28 features an integral strainer and integrated check-valve function, enabling condensate drainage and reverse-flow prevention in steam systems within the product's allowable pressure, temperature, and differential-pressure ranges.
Thermodynamic venting points in high-temperature steam systems
Used at discharge points requiring automatic thermodynamic venting in high-temperature steam systems. BK28 provides thermodynamic venting and uses a corrosion-resistant, water-hammer-resistant bimetallic regulator for automatic venting and closing within the product's allowable temperature and pressure ranges.
Installation & maintenance notes
Matching the welded connection type
BK28 can be connected using socket-weld or butt-weld ends. During installation, confirm that the pipeline connection type matches the connection end of the valve body.
FAQ
What is the operating principle of BK28?
BK28 is a thermostatic/thermodynamic steam trap that uses a Thermovit® bimetallic regulator to close the nozzle as the temperature rises and discharge condensate and air. It provides automatic air venting during plant start-up and operation, ensuring condensate drainage with virtually no water accumulation.
What connection options are available for BK28?
BK28 supports three end connection types: DIN flanges, socket-weld ends, and butt-weld ends, facilitating installation in different process piping systems.
What are the material and sealing features of BK28?
The valve body is made of structural steel 1.5415. The seat seal uses graphite/CrNi, the body gasket is asbestos-free, and the internal components are made of stainless steel and other materials, enabling reliable operation in common steam system environments.
What are the key installation and maintenance considerations for BK28?
The valve body features an integrated strainer and check valve and can be installed in any orientation. Routine maintenance should focus on inspecting the sealing gasket and internal components for wear; replace the spare parts kit when necessary. Spare parts information is available in the manufacturer's spare parts list.