Soft Seated Butterfly Valve
Quick Advantages
Why Choose Soft Seated Butterfly Valves
Soft seated butterfly valves are widely selected for bubble-tight sealing, low operating torque, and dependable performance in water treatment, HVAC, and general utility piping systems.
Bubble-Tight Sealing
Resilient seat construction provides reliable shut-off performance in clean water, air, and general utility applications.
Low Operating Torque
Soft seated designs help reduce operating effort, making manual and automated operation easier and more efficient.
Good for Clean or Mildly Corrosive Media
Suitable for clean water, HVAC fluids, air, and selected mildly corrosive media with proper seat material selection.
Multiple Seat Materials Available
EPDM, NBR, PTFE, and other seat materials can be selected according to media compatibility and service requirements.
Overview
What Is a Soft Seated Butterfly Valve?
A soft seated butterfly valve is a quarter-turn valve designed with a resilient seat made from materials such as EPDM, NBR, or PTFE. The resilient seat provides reliable shut-off between the disc and seat, making the valve suitable for water, HVAC, utility, and general service applications.
Compared with metal seated butterfly valves, soft seated designs are generally preferred for standard operating conditions where bubble-tight sealing, low operating torque, and economical installation are important.
Soft seated butterfly valves are widely used in water treatment, chilled water systems, cooling water lines, utility piping, and selected mildly corrosive media because they offer dependable sealing and practical operating performance.
Bubble-Tight Sealing
Designed for reliable shut-off in clean water, utility service, and standard industrial piping applications.
Low Operating Torque
The resilient seat design helps reduce operating effort for manual and automated service.
Multiple Seat Materials
Available with EPDM, NBR, PTFE, and other seat materials to match media compatibility and service requirements.
Configurations
Available Soft Seated Butterfly Valve Configurations
We supply soft seated butterfly valves in multiple body styles and operation options to fit water treatment, HVAC, utility, and general service requirements.
Wafer Soft Seated Butterfly Valve
A compact and economical option for standard flange installations in water, air, and general utility service.
Worm Gear Soft Seated Butterfly Valve
Recommended for medium and large sizes where smoother manual operation and reduced operating effort are required.
Pneumatic Soft Seated Butterfly Valve
Designed for automated shut-off and fast response in utility and industrial systems requiring reliable valve control.
Electric Soft Seated Butterfly Valve
Ideal for remote operation, monitored systems, and applications that require stable motorized valve actuation.
Key Features
Designed for Reliable Shut-Off and Easy Operation
Soft seated butterfly valves are engineered for bubble-tight sealing, low operating torque, and practical service performance in water, HVAC, utility, and general industrial applications.
Bubble-Tight Shut-Off
Resilient seat construction helps provide dependable sealing performance in standard service conditions.
Low Operating Torque
Seat and disc design help reduce operating effort for both manual and automated applications.
Good Media Compatibility
Suitable for clean water, air, HVAC fluids, and selected mildly corrosive media with proper seat selection.
Multiple Seat Options
Available with EPDM, NBR, PTFE, and other seat materials depending on media and temperature requirements.
Multiple Operation Choices
Can be supplied with lever, worm gear, pneumatic, and electric actuation to match different control requirements.
General Service Applications
Widely used in water treatment, HVAC, fire protection, and general utility pipeline service.
Technical Specifications
Technical Specifications
Standard ranges can be customized according to project requirements, media conditions, pressure class, and applicable standards.
Selection Overview
Soft seated butterfly valves can be supplied in different body styles, seat materials, and operation methods to match water treatment, HVAC, utility, and general industrial piping requirements.
- Standard Applications
Water treatment, HVAC, fire protection, cooling water, utility piping, and general industrial service.
- Available Configurations
Manual lever, worm gear, pneumatic actuator, and electric actuator.
- Custom Support
Materials, dimensions, drilling standards, and actuation packages can be matched to project needs.
Item
Specification
Valve Type
Soft Seated Butterfly Valve
Seat Type
EPDM / NBR / PTFE
Size Range
DN50–DN1200
Pressure Rating
PN10 / PN16 / Class 150
Body Material
Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel
Disc Material
Ductile Iron, Stainless Steel, Aluminum Bronze
Seat Material
Stainless Steel
Operation
Lever, Worm Gear, Pneumatic, Electric
End Connection
Wafer / Lug / Flanged
Applicable Media
Water, Air, HVAC Fluids, Mild Chemicals
Temperature Range
According to seat material and application condition
Standards
API, ANSI, DIN, BS, JIS
Custom sizes, materials, drilling standards, and actuator packages are available upon request. You can also replace the values above with your factory’s actual specification range.
Materials & Seat Options
Material Choices for Different Service Conditions
Different material combinations help improve sealing performance, media compatibility, corrosion resistance, and service life in standard operating conditions.
Seat Materials
Seat material is one of the most important factors in soft seated butterfly valve selection because it directly affects shut-off performance, media compatibility, and allowable temperature range. Different seat materials can be selected according to service conditions and project requirements.
EPDM Seat
Commonly used for water service, HVAC systems, and general utility applications requiring dependable sealing performance.
NBR Seat
Suitable for selected oil-related or utility media where compatible sealing material is required.
PTFE Seat
Provides improved chemical resistance for selected mildly corrosive media and applications requiring broader compatibility.
Customized Seat
Seat materials can be selected according to media type, temperature range, pressure level, and project-specific service conditions.
Body Materials
Body materials are selected according to pressure class, installation environment, corrosion requirement, and system standard.
Disc Materials
Disc material affects durability, corrosion resistance, and long-term operating performance. Selections can be matched to media type, service condition, and project requirements.
Applications
Typical Applications
Soft seated butterfly valves are widely used in systems where reliable sealing, low operating torque, and economical shut-off performance are required.
Water & Utility Systems
Soft seated butterfly valves are widely used in water treatment, chilled water, cooling water, and utility piping systems because they provide dependable sealing, easy operation, and practical installation flexibility.
HVAC Systems
Suitable for chilled water, cooling water, and building service piping where easy operation and reliable shut-off are important.
Fire Protection
Used in clean water, filtration, and utility process lines where practical shut-off performance is required.
General Industry
Applied in plant utility lines and service piping where dependable sealing and low operating torque are preferred.
Chemical Service
Suitable for selected mildly corrosive media when the correct seat and body materials are specified.
Application suitability depends on pressure, temperature, media compatibility, and seat material selection. Customized recommendations can be provided based on project requirements.
Actuation Options
Operation and Actuation Options
Soft seated butterfly valves can be supplied with manual or automated operation to match different shut-off requirements, valve sizes, and control systems.
The right actuation method depends on valve size, operating frequency, installation position, and whether local or remote control is needed.
- Manual or Automated
Available for basic shut-off, frequent operation, or integrated control systems in utility and general industrial service.
- Project-Based Selection
Actuation options can be matched according to valve size, torque requirement, service condition, and control method.
- Flexible Supply Scope
Complete valve and actuator assemblies can be supplied for easier installation and project integration.
Lever Operated
Best for smaller sizes and simple on-off service where quick manual operation is preferred.
Worm Gear Operated
Recommended for medium and larger sizes where smoother manual control and lower effort are required.
Pneumatic Actuated
Suitable for fast automated opening and closing in utility and industrial systems requiring remote shut-off.
Electric Actuated
Ideal for remote operation, monitored systems, and installations requiring stable motorized control.
Actuation options can be configured according to valve size, torque requirement, control method, and project specification.
Why Choose Raymon Valve
Flexible Configuration
Body material, seat type, disc material, and actuation options can be matched to project and service requirements.
Selection Support
We help match seat material, body style, and operation method to water, HVAC, and general utility service conditions.
Technical Documents
Technical data, drawings, and inspection-related documents can be supported for export and project requirements.
Fast Response
Quick follow-up for RFQ, product selection, material confirmation, and soft seated butterfly valve application questions.
Featured Products
Featured Soft Seated Butterfly Valve Products
Explore selected soft seated butterfly valve models for water, HVAC, utility, and general service applications.
Wafer Soft Seated Butterfly Valve
A compact and economical choice for standard flange installations in water, air, and general utility service.
Worm Gear Soft Seated Butterfly Valve
Recommended for medium and large sizes where smoother manual operation and reduced operating effort are required.
Pneumatic Soft Seated Butterfly Valve
Designed for automated opening and closing in utility and industrial systems requiring responsive shut-off control.
Electric Soft Seated Butterfly Valve
Ideal for remote operation, monitored systems, and applications requiring stable motorized valve actuation.
FAQ
Frequently Asked Questions
Common questions about soft seated butterfly valve selection, configuration, and application.
What is a soft seated butterfly valve?
A soft seated butterfly valve is a butterfly valve designed with a resilient seat made from materials such as EPDM, NBR, or PTFE for reliable shut-off in standard service conditions.
What is the difference between soft seated and metal seated butterfly valves?
Soft seated butterfly valves are generally used in lower temperature and less severe conditions where bubble-tight sealing and low operating torque are important. Metal seated butterfly valves are typically used for higher temperature or more demanding service.
Are soft seated butterfly valves suitable for water service?
Yes. They are widely used in clean water, cooling water, chilled water, and general utility systems because of their dependable sealing performance.
What seat materials are available for soft seated butterfly valves?
Common seat materials include EPDM, NBR, and PTFE. The correct option depends on media compatibility, temperature range, and shut-off requirements.
Can soft seated butterfly valves be supplied with actuators?
Yes. They can be supplied with lever, worm gear, pneumatic actuator, or electric actuator according to valve size and control requirements.
How do I choose the right soft seated butterfly valve?
You should confirm valve size, pressure rating, media type, temperature range, seat material, end connection style, and operation method to determine the most suitable configuration.
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