Pneumatic Soft Seated Butterfly Valve HN112

Product Overview

The Pneumatic Soft Seated Butterfly Valve HN112 is a quarter-turn valve with a pneumatic (air-operated) actuator, designed for on-off isolation duty in water, air, utility and general process piping systems. Catalog pneumatic configurations cover DN50 through DN1200, with PN0.6, PN1.0 and PN1.6 MPa pressure ratings. Wafer and flanged connection types are available depending on the offered configuration and project piping layout.

Honiks is a factory-backed industrial valve supplier based in China, supporting inquiry review, actuator sizing assistance, inspection coordination and project documentation for HN112 supply.

Pneumatic Actuator and Valve Configuration

The valve body is a soft seated butterfly valve paired with a pneumatic (air-operated) quarter-turn actuator. The actuator converts instrument air pressure — or a control signal in conjunction with a positioner — into rotary motion, driving the disc from fully closed to fully open. Return action may be via spring return (fail-safe) or double acting, depending on the offered actuator configuration.

Actuator sizing depends on the valve size, differential pressure, seat material, service medium and required operating speed. Air supply pressure, control signal type (on-off or modulating), position feedback requirements and enclosure rating should be stated at the inquiry stage. Accessories such as solenoid valves, limit switches and positioners can be specified if required.

Technical Range

• Size range: Catalog configurations cover DN50 through DN1200. The available range for a specific configuration depends on connection type, pressure rating and actuator sizing.
• Pressure ratings: PN0.6, PN1.0 and PN1.6 MPa. Availability for a given size and pressure rating combination should be confirmed for the offered configuration.
• Operation: Pneumatic actuator, with double acting or spring return options depending on the offered actuator.
• Duty: On-off isolation service. Modulating service with a positioner should be confirmed against the required control duty.

Soft Seat and Material Options

The soft seated design uses a resilient seat ring that seals against the disc in the closed position, providing the primary sealing interface. Catalog seat ring materials include rubber compounds and PTFE. The seat material should be selected based on the service medium, temperature range and expected operating duty.

Body material options include ductile cast iron, cast steel, alloy steel or stainless steel, depending on the offered configuration.

Disc material options include gray cast iron, ductile cast steel, cast steel, stainless steel or special material grades. The disc material should be selected for compatibility with the service medium and operating conditions.

Stem material options include 2Cr13 or stainless steel. Packing may include O-ring or flexible graphite depending on the configuration. Body, disc, seat, stem and packing materials should be confirmed for the specific medium, temperature range and project material specification.

Wafer and Flanged Configuration Notes

Catalog pneumatic soft seated butterfly valve configurations include wafer type and flange type butterfly valves. The wafer configuration is installed between mating pipe flanges — for example to GB/T 9113.1 or JB/T 79 flange standards — and held by the flange bolting. The flanged configuration uses integral flange connections for direct bolting to the mating pipe flanges.

The connection type — wafer or flanged — should be confirmed according to the project piping layout, flange standard and installation requirements. Not every size or pressure rating is available in both connection types; confirm availability for the requested combination.

Applications

HN112 pneumatic soft seated butterfly valves are suitable for industrial piping systems where automated on-off isolation simplifies plant operation, process control or remote monitoring:

• Water supply, circulating water and cooling water systems: Automated isolation for mains water, process cooling loops and utility water distribution.
• Air and compressed air lines: Isolation and distribution in pneumatic supply networks and air handling systems.
• Industrial water treatment and general process piping: Automated valve actuation in water treatment, filtration, aeration and transfer lines.
• Building services and HVAC piping: Automated isolation in heating, ventilation and air conditioning water circuits.

Media compatibility and pressure-temperature limits must be confirmed against the selected body, disc, seat and packing materials. For fire water piping or regulated building services, the buyer should confirm project requirements, local code obligations and required documentation before order.

Standards and Testing Notes

The HN112 product references the following Chinese national and trade standards for design, dimension and testing. These are catalog references; confirm the applicable standards, editions and any supplementary project requirements before order:

• Design: GB/T 12238
• Structure length: GB/T 12221
• Flange dimensions, wafer type: GB/T 9113.1
• Flange dimensions, flanged type: GB/T 9115.1, JB/T 79
• Inspection and testing: GB/T 13927, JB/T 9092

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

Inquiry Checklist

When preparing an HN112 inquiry, include the following for each line item:

• DN size
• Pressure rating: PN0.6, PN1.0 or PN1.6 MPa
• Connection type: wafer or flanged
• Pipe flange standard
• Body material
• Disc material
• Seat ring material
• Stem material
• Service medium: name, concentration, temperature range, solids content if any
• Actuator air supply pressure
• Actuator action: double acting or spring return
• Accessories required: solenoid valve, limit switch, positioner, air filter regulator
• Electrical requirements for solenoid or positioner
• Quantity per size, pressure rating and configuration
• Documentation requirements: test reports, material certificates

Frequently Asked Questions

Is HN112 only a wafer butterfly valve?

No. Catalog pneumatic soft seated butterfly valve configurations include wafer type and flange type butterfly valves. The final connection type should be confirmed by the project piping layout, flange standard and drawing for the offered configuration.

Can HN112 be used for fire protection systems?

For fire water piping or regulated building services, the buyer should confirm project requirements, local code obligations and required documentation before order.

What information is needed for an HN112 inquiry?

Provide the DN size, pressure rating, connection type, body and disc material, seat ring material, service medium with temperature range, actuator air supply pressure, actuator action (double acting or spring return), and any required accessories such as solenoid valves, limit switches or positioners. See the Inquiry Checklist section above for the full list.

How is actuator sizing confirmed?

Actuator sizing depends on the valve size, differential pressure across the disc in service, seat material, service medium and required operating speed. The actuator is sized by the valve supplier based on the service conditions stated in the inquiry. Provide the maximum differential pressure at which the valve is required to open, along with the air supply pressure available, to enable correct sizing.

Can HN112 be used with electric or manual operators instead of pneumatic?

HN112 as catalogued is a pneumatic soft seated butterfly valve. For electric actuation, manual worm gear operation or other actuation types, specify the operator requirement at the inquiry stage. The offered valve body and seat combination may support alternative actuator types, but each must be confirmed for the specific size, pressure class and service conditions.

Related Products and Resources

For soft seated butterfly valve configurations without automated actuation, see the Wafer Butterfly Valve HN107. For elevated temperature or abrasive butterfly valve service, see the Metal Seated Butterfly Valve HN109. Browse the Butterfly Valves category for additional configurations.

For butterfly valve applications in building services and water piping, review the industrial butterfly valves guide. For water treatment applications, see Water Treatment Solutions. For HVAC systems, see HVAC Solutions.

For inspection management, see Quality Control. For production and supply arrangements, see Factory Capability. Contact Honiks with your HN112 requirements for review and quotation.