The company's catalogue includes a wide variety of boiler controls, valves, water feeders and flow switches. General-purpose brass flow switches by McDonnell & Miller come with a screw that adjusts the sensitivity and allows flow rates up to 131 GPM at a maximum pressure and temperature of 160 psi and 250 degrees F, respectively. They also feature sealed EPDM O-rings providing excellent resistance to chemicals and creating a bubble-tight barrier for a leak-free operation. These switches are ideal for applications requiring low flow rate sensitivity, such as signal lights, alarms, metering devices and automatic burners.
See More
Flow SwitchesSuitable for motors, automatic burners, signal lights, alarms and metering devices. Feature a maximum flow rate and of 131 gpm and 1000 psi, respectively(36 Products)
PartsIncludes bronze / stainless-steel paddle kits designed for use with general-purpose liquid flow switches. Offered in packs of 2 and 4(17 Products)
Water Level Controls(74 Products)
Bulkhead Tank Fittings(24 Products)
Sensing Probes(8 Products)
Non-Adhesive Material Cutter Accessories(7 Products)
Valve Accessories(7 Products)
Boiler Accessories(6 Products)
Circulator Pump Accessories(6 Products)
Combustion Analyzer Accessories(4 Products)
Gears(4 Products)
Liquid Level Gauges(3 Products)
Faucet Repair Parts(2 Products)
Hydraulic Valves(2 Products)
Pump Control Boxes(2 Products)
Relief Valves(2 Products)
Ball Valves(1 Product)
Float Balls(1 Product)
Food Service Accessories(1 Product)
Fuel Systems Tools(1 Product)
Pneumatic Controls(1 Product)
Safety and Disconnect Switches(1 Product)
Snap Action Switches(1 Product)
Specialty Switches(1 Product)
Switch Accessories(1 Product)
Tubing(1 Product)
Vacuum Breakers(1 Product)
McDonnell & Miller products range from small to large sizes. They may require careful packaging as some items might get damaged while shipping. Hence, these items are delivered by courier shipment and air freight for minimum downtime.
The company's catalogue includes a wide variety of boiler controls, valves, water feeders and flow switches. General-purpose brass flow switches by McDonnell & Miller come with a screw that adjusts the sensitivity and allows flow rates up to 131 GPM at a maximum pressure and temperature of 160 psi and 250 degrees F, respectively. They also feature sealed EPDM O-rings providing excellent resistance to chemicals and creating a bubble-tight barrier for a leak-free operation. These switches are ideal for applications requiring low flow rate sensitivity, such as signal lights, alarms, metering devices and automatic burners.
They are designed for turning off the burner or shutting off fuel to prevent it from running once the water drops below a certain point, thereby eliminating the risk of rupture or catastrophic failure in the system. They feature brass threads for leak-proof sealing and a plug-and-play wiring harness...
These pump controllers are ideal for industrial and commercial low or high-pressure steam boilers. They feature Monel bellows to provide excellent corrosion resistance and an enclosed junction box that protects the switches within the system. They may include optional features like quick hook-up fit...
These switches are suitable for applications where high sensitivity is required, including water treatment systems, compressors, cooling systems for electronic circuits, booster pumps and bearings. They have an SPDT switch, a sensitivity adjustment screw and an enclosed switch compartment. These swi...
These universal water feeders are used in small commercial steam boilers to automatically add water to the boiler when a signal is given from the LWCO (low water cut-off) device. They feature field-adjustable dwell-feed cycles to reduce the chances of flooding the system, a manual feed button to add water at any time (irrespective of the feed cycle...
NEMA (National Electrical Manufacturers Association) enclosures protect electrical equipment from a variety of environmental hazards like dust, water and debris. They are made of different materials and can be used in both indoor and outdoor applications. They are rated differently to provide protection against different types of external factors. For example, NEMA 1 enclosure protects against dust, while NEMA 4 provides protection against dust, water and corrosive materials.
A bellow is made of a flexible material that expands or contracts in response to changes in fluid pressure, which in turn activates a switch or relay to turn the pump on or off.
