HVAC Blogs

High Temperature Damper

High temperature dampers are utilized in a variety of applications to modulate vapor fluxes. These applications are frequently found in high-temperature boilers, heaters, and waste heat recovery systems. To permit use in these challenging services, these modulating dampers can be produced in a variety of materials and utilize a butterfly valve arrangement.

To shield the metal from extremely high temperatures, they can also be lined with refractory or water-cooled. Slide gate valves from EB Air Control Supply, which may likewise be made to resist the same severe temperatures, are used for shutdown applications.

Functions of a damper

The flow of air inside a duct, chimney, VAV box, air handler, or another piece of air-handling equipment can be stopped or controlled by a damper, which is a valve or plate. A damper can be used to regulate central air conditioning (heating or cooling) for individual room temperature and climate control, as in the case of Volume Control Dampers.

It can also be used to turn off central air conditioning (heating or cooling) in an underused room. Its functioning can be either automatic or manual. A handle on the outside of a duct is used to operate manual dampers.

Automatic dampers continuously adjust airflow. They are driven by electric or pneumatic motors that are in turn managed by a thermostat or a building automation system. To adjust the flow of air-conditioned air and achieve temperature control, automatic or motorized dampers may also be controlled by a solenoid, with the degree of airflow calibrated.

What is a high temperature damper?

An instrument for controlling or isolating flow is a high-temperature butterfly valve. The disc, which is located in the middle of the valve body, serves as the closing mechanism. The shaft from the disc travels through the top of the valve body and connects to a handle or actuator. The butterfly valve’s disc is always in the flow, unlike a ball valve, which causes a pressure decrease.

How does it operate?

A high temperature butterfly damper functions in the quarter-turn fashion. It means that turning the closed disc 90 degrees will fully open the valve and vice versa. To slow the flow, they can also be opened gradually. While it is possible to do this manually, using an actuator and limiting the flow results in greater accuracy. With positioners for pneumatic and hydraulic actuators, or modulating boards for electric actuators, actuators can be modified to allow incremental flow.

Why install a high temperature butterfly damper?

Our high-temperature butterfly valve provides high-pressure applications with a heavy-duty, low-cost, maintenance-free solution. Utility, pulp and paper, oil and gas production, fuel handling systems, marine, petrochemical processing, air conditioning, and refrigeration are a few common industries that use butterfly valves. Our butterfly valve is available in a wide range of sizes, shapes, and pressure classes, including 150, 300, and 600 psi. Where necessary, these valves can also offer dead-end service.

Features of high temperature butterfly damper

Either lug-style or wafer-style design options are available for high-temperature butterfly valves. Additionally, resilient seated butterfly valves provide a variety of seat materials. This includes FDA-approved materials and Buna-N, EPDM, Viton, and Teflon, to support a variety of process applications.

Contrary to concentric, high-performance, and triple-offset butterfly valves, which offer incrementally greater pressure ratings and are necessary for an ANSI rating, rubber-lined butterfly valves have lower pressure ratings. With the appropriate valve, any process material flowing through the control loop may be controlled. Our high-temperature butterfly valve is a great valve that offers the operator-required precision control and bubble-tight seal.


High-temperature butterfly flat dish circular damper (BFD) is created as welded assemblies. It is intended to function in both directions of flow. Either a swing-through disc or a metal plate can make direct contact with the seat. The project’s requirements can be taken into consideration while determining the between-flanges dimension. On request, wafers or welded ends can be produced. Contact EB Air control for our high-temperature model that is intended for use in applications where the design pressure is less than 0.5 bar and the temperature does not exceed 1000oC.

ebair_wpHigh Temperature Damper