Asco S-Series Combustion Switches

ASCO S-Series combustion switches consist of a switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled 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 swtiches. 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.

Features:  

• Set point repeatability, +1% of operating range.
• UL Listed in the gas and oil equipment list.
• FM Approved as “pressure supervisory switches.”
• Externally visible pressure setting scales.
• External adjusting nuts.
• Choice of fixed or full-range adjustable deadbands.
• Choice of single or two-stage units.
• Mounts in any position.
• Rugged and vibration resistant.
• Separate electrical, pressure and adjusting chambers.
• Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field.
• Withstands high surge pressures.