ASCO TriPoint Pressure Switch SB31DK

ASCO, Automatic Switch Company, was found in 1888 as an elevator, compressor, and generator controls company. But with the invention of the solenoid valve, the ability for engineers to autonomously control the flow of fluid in a system, in 1910 a whole new line of products was introduced to the company. The new products include two position on/off valves to entire flow control systems. 

With the ever increase of new customer applications and demands ASCO began producing air-operated valves, manual reset valves, and pressure and temperature switches in the 1970s. In 1985 ASCO was acquired by a leading industrial corporation called Emerson. Emerson would go on to combine the purchased Joucomatic brand, a lead pneumatic valve provider in Europe, with the ASCO family. 

Coming full circle, in 2008 Emerson merged with the ASCO and Numatics companies to become ASCO Numatics. A now unified business that offered comprehensive flow control and pneumatics solutions for a wide range of industry-focused application. Finally, in 2016 the entire brand was brought under the umbrella of the ASCO brand, setting the stage of the company’s next period of growth. But on November 1,  2017 ASCO was acquired by Schneider Electric. 

Pressure switches are safety devices used in positive-pressure or differential-pressure systems to sense gas or air pressure changes. Here is a good video to get an idea of how a pressure switch works. A pressure switch is used to close an electrical contact when a certain set fluid pressure has been reached on it input. The switch may be designed to make contact based on a set of “if-then” statements. For example, if the pressure rises, then switch makes contact. Or if the pressure falls, then switch makes contact. Pressure switches are used in a number of industrial applications to help supervise control systems.

ASCO S-Series combustion switches consist of a switch unit and a transducer unit. When pressure is applied to the transducer it is converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. S-Series combustion switch units incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snap-action switches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly.

ASCO TriPoint Pressure Switch SB31DK:

• ASCO
• ASCO TriPoint
• SB31DK
• Pressure Switch