Furnace Pressure Switches

A reliable source for Pressure Switch information and leading Pressure Switch Companies & Manufacturers.

Designed to actuate by changes in the pressure of a liquid or gas, furnace pressure switches are programmed to activate at certain pressure points, and may be designed to make contact either on pressure rise or on pressure fall. Read More…

Furnace Pressure Switches A furnace pressure switch is an interlock device that senses changes in hydraulic or pneumatic input pressure and responds by making electrical contact, switching on or off.

Leading Manufacturers

Mentor, OH  |  440-205-7600

We manufacture unprecedented pressure switches. These top of the line devices are strong and highly proficient. If you are in need of sophisticated items then our engineers will assist you with our processes to discover the best product for your application. Our pressure switches are great for: electric/gas heaters, pumps, small air compressors, electric strip heaters in VAV systems, waste oil heating systems and more.

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Tecmark Corporation $$$

Pittsburgh, PA  |  412-788-2830

Since 1980, KOBOLD has been a leading manufacturer of high-quality pressure switches, gauges and transmitters. KOBOLD brings to you 25 years of experience, excellent customer service and FREE technical support. Call today or visit our website for all of your instrumentation needs. Our highly trained engineers and sales team can find the optimal solution for even the most demanding applications.

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KOBOLD Instruments Inc. $$$

Oneonta, NY  |  866-395-2902

At MAMCO Precision Switches, we have pressure switches of the highest quality. MAMCO quality products will not have the leakage problems or set point instability that others can have. With our expansive inventory, we manufacture and extensive line of products so that all needs can be met. Our competitively priced products and outstanding customer service are ready to serve you, please call!

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MAMCO Precision Switches $$$

Stratford, CT  |  203-378-8281

Ashcroft® manufactures a full line of high quality pressure switches for the shutdown and control of various types of processes. Ashcroft® switches meet application needs for industries such as off-road equipment, generators, compressors and many more. As the leader in technology and innovations, we design our products based on our customer’s requirements.

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Ashcroft® Inc. $$$

Lenexa, KS  |  800-676-6794

SOR® manufactures a full line of pressure, differential pressure, temperature, vacuum and level switches that are certified fit for use in SIL (Safety Integrity Level) environments. We are one of only a few manufacturers to offer its entire range of switches certified to the IEC 61508 standard. Our fundamentals include superior quality, excellent service and quick delivery.

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SOR Inc. $$$
placeholder image Tecmark Corporation KOBOLD Instruments Inc. MAMCO Precision Switches Ashcroft® Inc. SOR Inc.

Furnace pressure switches are produced by pressure switch manufacturers to operate in furnaces as safety devices through offering control stability through inconsistent conditions and assuring continuous service under extreme shock and vibration. They typically work with gas or liquid pressure situations, individually or in a combination.

Common industries that utilize furnace pressure switches include pulp and paper residential, industrial, food processing, heating and cooling, electronics, foundry. Furnace pressure switches are used for applications such as residential boilers or furnaces, waste oil heating systems, small air compressors, electric or gas heaters, pumps, food processing equipment and electric strip heaters in VAV systems.

Furnace pressure switches typically consist of an elastomeric diaphragm, insulators and field adjustable pressure set points. When a furnace pressure switch is actuated an elastomeric diaphragm moves and opens or closes an electrical circuit that interrupts or continues the flow involved. An elastomeric diaphragm eliminates the need for an oil barrier because they separate pressure instruments from the process media, while allowing the instruments to sense the process pressure.

The insulators are designed as a protective barrier against direct exposure to live parts. A furnace pressure switch is set to a certain point of pressure to which it will automatically respond. Field adjustable pressure set points allow the furnace pressure switch to be calibrated to the correct pressure points for opening and closing the diaphragm. There are three main types of furnace pressure switches: air pressure switches, water pressure switches and fuel pressure switches.

An air pressure switch ensures that there is enough fresh air circulated through the furnace. A water pressure switch is used in furnaces that heat water and protect the water heater tank from burns. A fuel pressure switch monitors the pump's ability to produce enough pressure for the liquid fuel oil to be squeezed into a fine mist through a nozzle for full combustion.

Furnace Pressure Switches Informational Video