- 7685–A Corporate Blvd. Plain City, OH 43064, USA
- 166 Benjamin Hudon Montreal, QC, Canada H4N 1H8
- +1 614 873 8995
High temperature butterfly valves are used to isolate or control flow in process systems where elevated media temperature, thermal cycling, pressure, material compatibility, and shutoff performance must all be considered together. In industrial service, temperature affects the valve body, disc, shaft, seat, packing, actuator mounting, and long-term sealing performance.
BPC supports high temperature butterfly valve selection across resilient seated, high performance double offset, and metal seated configurations, helping process teams match the valve design to the actual service conditions instead of selecting by temperature rating alone.
High temperature butterfly valves are quarter-turn valves designed for applications where process temperatures exceed the normal limits of standard elastomer seated valve assemblies. They use a rotating disc to open, throttle, or isolate flow, but the materials and sealing design must be selected for the operating temperature, pressure, fluid chemistry, and expected duty cycle.
For general industrial butterfly valve options, review BPC’s BVC butterfly valves product family.
A high temperature butterfly valve may use:
The correct configuration depends on whether the valve is used for shutoff, throttling, automated control, frequent cycling, dead-end service, steam service, hot gases, thermal oil, chemical transfer, or utility isolation.
The seat is one of the most important components in a high temperature butterfly valve because it provides the sealing interface between the disc and valve body. As temperature increases, seat materials can harden, soften, relax, swell, or lose compression recovery. This directly affects shutoff performance, torque, leakage rate, and maintenance life.
| Seat Material | Typical Use Case | Selection Consideration |
|---|---|---|
| EPDM / EPT | Hot water, air, some chemicals | Good heat and weathering resistance, but not suitable for oils or hydrocarbons |
| Viton | Higher-temperature chemical and oil service | Strong chemical and heat resistance in many industrial fluids |
| Silicone | High-temperature clean or air service | Useful where flexibility at elevated temperature is required |
| PTFE | Chemical service and elevated temperature applications | Low friction and strong chemical resistance |
| Metal Seat | Severe temperature, high cycle, abrasive, or demanding service | Used where soft seats are not appropriate for the temperature or duty cycle |
For resilient seated applications, BPC’s VF7 resilient seated butterfly valves provide an economical option with elastomer seats for services within the valve’s temperature and pressure limits.
For more demanding elevated-temperature applications, BPC’s VF9 high performance double offset butterfly valves provide soft seat and metal seat options for higher pressure, higher temperature, and more severe process conditions.
A butterfly valve operates by rotating a disc approximately 90 degrees within the flow path. When the disc is parallel to flow, the valve is open. When the disc is perpendicular to flow, the valve is closed. In throttling service, the disc is positioned between fully open and fully closed to regulate flow.
In high temperature service, this simple operating principle becomes more complex because heat affects:
A valve that performs correctly at ambient temperature may not perform the same after repeated heat cycles. For this reason, high temperature butterfly valves should be selected based on full operating conditions, not just nominal pipe size.
Not every high temperature application requires the same valve design. The correct choice depends on the temperature range, pressure class, leakage requirements, fluid type, and cycling frequency.
| Valve Design | Best Fit | Key Advantage | Limitation |
|---|---|---|---|
| Resilient Seated Butterfly Valve | Moderate temperature utility and process service | Economical shutoff with broad material options | Limited by elastomer seat temperature and chemical compatibility |
| Double Offset High Performance Butterfly Valve | Higher temperature, higher pressure, and tighter shutoff applications | Reduced seat wear and improved sealing performance | Requires more careful material and seat selection |
| Triple Offset Butterfly Valve | Severe temperature, metal seated, high-cycle, or demanding shutoff service | Metal-to-metal sealing and reduced rubbing contact | Higher cost and more specialized selection requirements |
A resilient seated valve may be appropriate for hot water, air, mild chemicals, and moderate-temperature service. A double offset high performance valve is more appropriate when pressure, temperature, or shutoff requirements increase.
A triple offset design is typically used when soft seats are not suitable, especially in severe-service, high-temperature, or metal-seated isolation applications.
High temperature butterfly valves are used because they provide compact, quarter-turn flow control with lower weight and shorter face-to-face dimensions than many gate, globe, or plug valves. In large pipe sizes, this can reduce installed weight, simplify automation, and lower system complexity.
Key benefits include:
High temperature butterfly valves are especially useful where the system needs efficient shutoff or control without the size and weight penalty of heavier valve styles.
High temperature butterfly valves are used across industrial systems where heat, process media, and reliability requirements intersect.
Common applications include:
In these services, the valve must be selected for both normal operating temperature and upset conditions. A system that normally runs at 300°F may experience cleaning cycles, startup spikes, or process excursions that require a higher design margin.
1. Confirm the Real Temperature Profile
Do not select a valve based only on normal operating temperature. Confirm:
Thermal cycling can be more damaging than steady-state heat because repeated expansion and contraction can affect bolting, packing, seat compression, and actuator alignment.
2. Match Seat Material to Temperature and Fluid Chemistry
Temperature rating alone does not confirm compatibility. The media may chemically attack a seat that otherwise appears temperature-capable. Oils, hydrocarbons, solvents, oxidizers, acids, caustics, and steam all affect seat selection differently.
For example, EPDM may be suitable in hot water or certain chemical services, while Viton may be more appropriate for many higher-temperature oil or hydrocarbon applications. PTFE or metal seats may be required when temperature, chemical exposure, or leakage requirements exceed elastomer capability.
3. Evaluate Pressure at Operating Temperature
Pressure ratings often change as temperature increases. A valve that is acceptable at ambient temperature may require derating at elevated temperature, depending on body material, seat design, flange class, and applicable standards.
For high temperature service, confirm pressure rating at the actual operating temperature, not only the cold working pressure.
4. Consider Disc and Shaft Material
Disc and shaft materials must withstand temperature, fluid exposure, erosion, and mechanical load. Stainless steel is commonly used where corrosion resistance and temperature performance are required. Aluminum bronze, carbon steel, and specialty alloys may also be appropriate depending on the process environment.
Material selection should account for:
5. Account for Actuation Requirements
High temperature service can increase valve torque because seat friction, packing load, process pressure, and thermal expansion may change after the valve reaches operating temperature. Automated systems should use actuators sized with appropriate safety factors.
BPC supports manual, pneumatic, electric, and hydraulic operator options. For automated service, review BPC’s butterfly valve actuators to compare actuation approaches.
6. Review Leakage Requirements
High temperature isolation service may require specific leakage performance. Soft seated valves can provide tight shutoff in many applications, but severe temperature, abrasive media, high cycling, or fire-safe requirements may require a high performance or metal seated design.
Leakage requirements should be defined before selection, especially for:
High temperature valve assemblies may require specific combinations of body, disc, shaft, and seat materials.
Common body materials include:
Common disc materials include:
Common shaft materials include:
Seat and sealing options vary by valve series, pressure class, and temperature range. For specific high temperature configurations, BPC can help compare available options against the application data.
A VF7 resilient seated butterfly valve is often suitable when the service temperature is within elastomer limits and the application requires economical shutoff, broad size availability, and standard industrial performance.
A VF9 high performance double offset butterfly valve is generally the better choice when the application requires higher pressure ratings, higher temperature capability, reduced seat wear, or improved shutoff performance under more demanding process conditions.
Use VF7-style resilient seated valves when:
Use VF9-style high performance valves when:
High temperature butterfly valves are frequently integrated into automated flow control systems. In these applications, valve selection must account for the complete operating package, not only the valve body.
A reliable automated package should consider:
Pneumatic actuators are commonly used for fast, rugged on/off operation. Electric actuators are useful where compressed air is unavailable or where modulating control is required. Hydraulic actuation may be used in higher-force or specialized industrial systems.
Before selecting a high temperature butterfly valve, confirm the following:
This information allows BPC to recommend a valve configuration that supports long-term reliability rather than simply matching a nominal size and temperature number.
A high temperature butterfly valve is typically any butterfly valve selected for service above standard elastomer temperature limits or in an application where elevated temperature affects seat performance, torque, pressure rating, material compatibility, or shutoff reliability.
Butterfly valves can be used in some steam services when the valve design, seat material, pressure rating, and temperature rating are suitable. Steam applications require careful review because temperature, pressure, condensate, cycling, and leakage requirements can exceed the capability of standard resilient seated valves.
There is no single best seat for every high temperature service. EPDM, Viton, silicone, PTFE, and metal seats may all be appropriate depending on the fluid, temperature, pressure, and leakage requirement. The correct seat must be selected based on both thermal and chemical compatibility.
Metal seated butterfly valves are often preferred when the temperature, cycling, abrasion, or process severity exceeds the practical limits of soft seats. However, soft seated high performance valves may still be appropriate when the temperature and media are compatible.
The actuator itself may not always require a high temperature rating, but the complete assembly must be designed to protect the actuator from heat transfer. Mounting brackets, stem extensions, insulation, ambient temperature, and torque changes should all be reviewed.
To quote the correct valve, BPC needs the pipe size, flange standard, media, operating temperature, maximum temperature, pressure, required shutoff performance, body and trim preferences, actuation requirements, and any applicable industry standards.
High temperature butterfly valves require more than a basic size and pressure selection. Temperature affects the seat, body, disc, shaft, packing, actuator torque, leakage performance, and long-term maintenance requirements. The most reliable configuration depends on the full operating profile, including media chemistry, pressure at temperature, cycling frequency, automation needs, and shutoff expectations.
BPC helps industrial teams compare resilient seated, high performance double offset, and metal seated butterfly valve options for demanding process environments. To review available configurations, request a quote or contact BPC for application guidance on the correct high temperature butterfly valve package.
Opt-Out Preference Signal Honored — we detected your browser's Global Privacy Control and opted you out of the sale/sharing of your information.
We use cookiesWe use cookies to improve your experience and for analytics. By continuing you agree; you can opt out anytime. Privacy policy.
Choose which cookies we may use. You can change this anytime.
