The Neles BH Series butterfly valve is an industrial butterfly valve designed for inlet isolation in air separation units and for protecting molecular sieve reactors against pressure surges. The series offers resilient and metal-seated designs, covering sizes DN 200 to 1600 and pressure ratings PN 10 to 40. Carbon steel or stainless steel valve bodies for wet media are available, as are heating jackets for use in cold climates. The valve features a safety self-locking design for a specified differential pressure and opens only at the precise differential pressure. Its low-friction lever mechanism effectively reduces the risk of pressure surges in adsorption beds and prevents abrasive wear.
Neles butterfly valve, BH Series
Neles
Neles BH Series Butterfly Valve (ASU Inlet Isolation)
Butterfly valve for ASU inlet isolation, available with resilient or metal sealing.
- Category
- Butterfly Valves
- Nominal size range
- DN 200 - 1600 / 8" - 64"
- Maximum operating temperature
- Up to +260 °C
Specifications
- Valve type
- Butterfly valve
- Nominal size range
- DN 200 - 1600 / 8" - 64"
- Maximum operating temperature
- Up to +260 °C
- Pressure rating
- PN 10 - 40
- Flange drilling standards
- ASME Class 150 and 300 drilling available
- Valve body materials
- Carbon steel, stainless steel
- Seating type
- Resilient seating, metal seating
- Safety design
- Safety self-locking design for a specified differential pressure
- Opening condition
- Opens only at the precise differential pressure
- Heating design
- Heating jacket available
Application scenarios
Air Separation Unit Inlet Isolation
Used as an inlet isolation valve for pressure swing adsorption units. The valve features a self-locking safety structure for a specified differential pressure and opens only at the precise differential pressure, meeting the safety isolation and flow control requirements of inlet piping.
Pressure Surge Protection for Molecular Sieve Reactors
Used to protect molecular sieve reactors in pressure swing adsorption units and reduce the risk of pressure surges in adsorption beds caused by pressure changes. The lever mechanism operates with low friction, the sealing areas are less susceptible to abrasive wear, and the operating torque is low.
Valve Applications with Wet Media
Suitable for applications involving wet media. A stainless steel configuration is available, and the product documentation explicitly states that this configuration is suitable for wet media.
Heating Jacket Configuration for Cold Regions
Suitable for valve installation in cold regions and available with a heating jacket configuration.
Selection points
Self-locking safety design for pressure swing adsorption differential pressure
The self-locking safety design is configured for a specified differential pressure and allows opening only at the precise differential pressure. It is specifically designed for inlet isolation valves in pressure swing adsorption units to prevent pressure surges in molecular sieve reactors.
Low-friction, low-torque lever mechanism
The lever mechanism enables low-friction valve operation, reducing the risk of abrasive wear at the seating area and resulting in low operating torque.
Large-size configuration capability
The nominal size range is DN 200 to 1600, or 8 inches to 64 inches, supporting valve selection for large-diameter piping systems.
ASME flange drilling compatibility
ASME Class 150 and 300 drilling is available for convenient matching with the corresponding pipe flange interfaces.
Configurations for wet media and cold environments
Stainless steel valve bodies are available for wet media, and heating jackets can be provided for use in cold climates.
Installation notes
Strictly follow differential pressure requirements during opening and commissioning
The BH Series butterfly valve uses a self-locking safety design for a specified differential pressure and opens only at the precise differential pressure. During installation and commissioning, confirm that the valve differential pressure meets the design requirements. Do not force operation at a differential pressure outside the design range.
Select a stainless steel valve body for wet media service
The BH Series is available with carbon steel and stainless steel valve bodies. The stainless steel design is suitable for wet media. During installation, confirm that the valve body material matches the actual media conditions and the ordered configuration.
Confirm the heating jacket configuration in cold climates
A heating jacket is available for the BH Series for use in cold climates. For installations in cold regions, confirm that the valve heating jacket configuration meets the ordering requirements.
FAQ
How does the Neles BH Series butterfly valve reduce the risk of pressure surges in molecular sieve adsorption beds in air separation units?
The BH Series uses a self-locking safety design for a specified differential pressure. The valve opens only under the precise differential pressure conditions and can be used for inlet isolation in air separation units, helping prevent pressure surges in molecular sieve reactors.
Which air separation and molecular sieve applications are suitable for the BH Series butterfly valve?
The series is specifically designed for inlet isolation valve applications in air separation units (ASU) and is suitable for molecular sieve-related applications. Its high flow capacity and low-torque characteristics help meet the requirements of large-diameter inlet isolation.
Which seating and valve body materials are available for the Neles BH Series butterfly valve?
The BH Series is available with resilient or metal seating and with carbon steel or stainless steel valve bodies. The stainless steel design is suitable for wet media. The specific seating type and material combination must be confirmed according to the actual model and application conditions.
What are the size, temperature and pressure rating ranges of the BH Series butterfly valve?
The series covers sizes DN 200 to DN 1600 (8 inches to 64 inches), a maximum applicable temperature of +260 °C, and pressure ratings from PN 10 to PN 40. ASME Class 150 and Class 300 drilling is also available. The specific configuration must be confirmed according to the actual model and application conditions.
Can antifreeze or insulation measures be used when installing the BH Series butterfly valve in cold climates?
The BH Series is available with a heating jacket for cold-climate applications. During installation, confirm the specific configuration based on the media condition, ambient temperature and on-site piping insulation plan.