Metal Seated Butterfly Valve HN109

Product Overview

The Metal Seated Butterfly Valve HN109 is a hard-sealed butterfly valve for industrial service where elevated temperatures, abrasive media or demanding operating conditions require a metal-to-metal or multi-layer metallic sealing structure. HN109 covers catalog configurations from DN50 to DN2000 and PN0.6 to PN4.0 MPa, with worm gear, pneumatic and electric actuation options. Honiks is a factory-backed industrial valve supplier based in China, supporting project inquiry review, inspection coordination and documentation preparation for HN109 supply.

The actual available size and pressure range depends on the connection type, pressure rating, actuation method and confirmed drawing for the offered configuration.

Metal Seated Construction

A metal seated or hard-sealed butterfly valve replaces polymer seat materials with a metallic sealing ring or multi-layer metallic sealing structure. Catalog configurations reviewed include metal hard sealed, metal elastic hard sealed, multi-metallic hard sealed and butt-welding metallic hard sealed butterfly valve series. The metallic seat ring works against the offered disc sealing surface to form the sealing interface; disc material and hard-facing details should be confirmed for the specific configuration.

Some welded or project-specific configurations may use three-eccentric or multi-layer hard sealing structures; the final structure should be confirmed on the offered drawing. The seat design helps accommodate differential thermal expansion between the body, disc and seat components under the specified service conditions.

Technical Range

• Size range: Catalog configurations cover DN50 through DN2000. The available range for a specific configuration depends on connection type, pressure rating, actuation and confirmed drawing.
• Pressure ratings: PN0.6 through PN4.0 MPa across catalog configurations. Not every size is available in every PN class; confirm availability for the requested combination.
• Temperature reference: Carbon steel body materials have a catalog reference range of -29 degrees C to 425 degrees C; stainless steel body materials have a catalog reference range of -40 degrees C to 600 degrees C. The final pressure-temperature rating depends on the selected body material, seat and seal structure, packing material, media characteristics and project operating conditions. Confirm the applicable rating against the project datasheet.
• End connections: Flanged ends to applicable flange standards.

Materials and Sealing Options

Body: Cast steel, stainless steel, Cr-Mo steel, alloy steel or cast iron, depending on configuration. The material selection should follow the medium data sheet, confirming chemical compatibility, temperature limits and any solids content or abrasive characteristics of the process stream.

Disc: Cast steel, alloy steel, stainless steel or Cr-Mo steel, selected for the media and temperature conditions.

Seat and sealing ring: Stainless steel, multi-layer metallic sealing structure, wear-resistant material or other offered sealing material depending on configuration.

Stem: 2Cr13, stainless steel or Cr-Mo steel depending on configuration.

Packing: Flexible graphite, selected for higher-temperature service.

Operation Options

• Worm gear operator: For manual operation with mechanical advantage for larger sizes or higher torque applications. Position holding should be confirmed on the offered operator.
• Pneumatic actuator: Double-acting or spring-return configurations for automated or remote operation. Spring-return is available where the valve must drive to a safe position on loss of instrument air or control signal.
• Electric actuator: For integration with plant control systems. Voltage, control signal type, position feedback requirements and enclosure rating must be specified at the ordering stage.

Applications

HN109 metal seated butterfly valves are suitable for industrial service where a hard-seal design provides practical advantages:

• High-temperature water, steam and thermal fluid service: Where polymer seats would degrade or soften, a metallic sealing structure avoids the temperature limitation of soft seats.
• Industrial oil, gas utility or hydrocarbon process service: Where metallic sealing materials may provide better resistance to heat or abrasive particles than soft seats; confirm material compatibility and leakage acceptance criteria for the offered configuration.
• Corrosive or abrasive industrial media: Including chemical process streams and applications with suspended solid particles. Confirm material compatibility against the specific chemical, concentration and temperature conditions.
• Power generation auxiliary systems: High-temperature water, steam and cycle isolation where the metallic sealing structure provides a practical alternative to soft-seated designs.

Media compatibility must be confirmed against the body, disc, seat and packing material selection before the valve is specified for a particular process stream.

Standards and Testing Notes

The HN109 product references the following Chinese national and industry standards for design, dimension and testing. These are catalog references; confirm the applicable standards, editions and any supplementary project requirements before order:

• Design reference: GB/T 12238
• Structure length: GB/T 12221
• Flange dimensions: GB/T 9113 / GB/T 9115 series
• Testing: GB/T 13927, JB/T 9092

Pressure test reports, material certificates and dimensional inspection records can be coordinated as part of the project documentation package.

Inquiry Checklist

When preparing an HN109 inquiry, include the following for each line item:

• DN size
• Pressure rating: PN class
• Connection type and flange standard
• Body material
• Disc material
• Seat and sealing structure
• Stem material
• Operation: worm gear, pneumatic or electric actuator
• If actuated: voltage, control signal type, fail position, enclosure rating
• Medium: name, concentration, temperature range, solids content if any
• Quantity per size, pressure class and configuration
• Documentation requirements: test reports, material certificates

Frequently Asked Questions

What is the difference between a metal seated butterfly valve and a soft seated butterfly valve?

A metal seated butterfly valve uses a metallic sealing ring or multi-layer metallic sealing structure instead of a polymer seat. This allows operation at temperatures and in media conditions where soft seats would degrade. The choice between metal and soft seating depends on the temperature, media, pressure and required shut-off performance.

What size range does HN109 cover?

Catalog configurations cover DN50 through DN2000. The actual available range depends on the connection type, pressure rating, actuation method and confirmed drawing for the offered configuration. Not every size is available in every PN class; confirm availability for the requested combination.

What temperature range can HN109 handle?

Carbon steel body materials have a catalog reference range of -29 degrees C to 425 degrees C; stainless steel body materials have a catalog reference range of -40 degrees C to 600 degrees C. The allowable temperature for a specific configuration depends on the body material, seat and seal structure, packing material, media properties and project operating conditions.

Can HN109 be used for throttling or flow control?

A butterfly valve can be used for modulating service within the recommended travel range when the actuator, positioner and seat design are selected for the required control duty. Prolonged operation in the cavitation or high-velocity region of the disc travel can accelerate seat and disc wear. Confirm the control duty requirements with the offered configuration.

What seat leakage rate should be expected for a metal seated design?

Metal seated butterfly valves are tested to the applicable inspection standard referenced in the project specification, such as GB/T 13927 or JB/T 9092. Confirm the required leakage class or acceptance level in the inquiry to ensure the offered configuration is tested to the correct criteria.

For pneumatic butterfly valve configurations in utility water, air and process piping, see the pneumatic soft seated butterfly valve for utility service.

Related Products and Resources

For soft-seated butterfly valve configurations, see the Wafer Butterfly Valve HN107. For metal seated ball valve configurations, see the Metal Seated Ball Valve HN108. Review the Butterfly Valves category for additional disc and seat combinations.

For water, HVAC and fire water piping applications, review the industrial butterfly valves guide. For chemical and abrasive service, see the industrial valves for chemical processing guide. For power generation applications, review the pressure seal valves for power plant piping guide.

See Quality Control for inspection management and Factory Capability for production and supply arrangements. Contact Honiks with your HN109 requirements for review and quotation.