MCDONNELL & MILLER FS8-W Flow Switch 1 Inch Nema

McDonnell & Miller FS8-W liquid flow switch is designed to monitor the flow of liquids, such as water or oil, in pipes and systems. It is used in HVAC systems, boilers and other fluid-handling equipment to ensure proper flow rates. This switch prevents equipment damage or failure due to insufficient flow, acting as a safety and control device.

Working Mechanism:

• This McDonnell & Miller FS8-W liquid flow switch operates based on a mechanical mechanism.
• It consists of a flow chamber with four stainless steel paddles in various sizes (1, 2, 3 and 6 inches), which are inserted into a pipe carrying the liquid.
• When liquid flow is present, it imparts force on these paddles, causing them to move.
• This movement triggers a single pole, double throw snap switch, which then signals a change in the flow state, allowing the switch to monitor and control liquid flow within the system.
• The sensitivity adjusting screw further fine-tunes the response, making it easy to customise flow rate thresholds for precise operation.

Features:

• It features a sealed monel bellows for reliability and resistance to corrosion.
• This McDonnell & Miller liquid flow switch has a sensitivity adjusting screw to simplify flow rate customisation.
• It has a single pole / double throw snap switch, allowing the flow switch to control and signal in different electrical circuits.
• This FS8-W flow switch has a maximum temperature of 225 degrees F and a maximum operating pressure of 160 psi.
• It features BSPT threads and gold-plated contacts to enhance compatibility and electrical conductivity, respectively.

Frequently Asked Questions:

Q. What safety precautions should I consider while using this McDonnell & Miller liquid flow switch?

A.

• Power off during installation and maintenance.
• Securely mount the flow switch.
• Ensure proper ventilation.
• Handle hazardous chemicals safely.
• Consider professional help if needed.
• Regular inspections and prompt maintenance.
• Shut down correctly during maintenance.
• Communicate emergency procedures.
• Train personnel for safety.
• Maintain detailed records.
• Comply with regulations.
• Conduct a risk assessment.

Q. What are the factors to consider while choosing this McDonnell & Miller liquid flow switch?

A. Major factors include flow rate range, pipe size compatibility, fluid compatibility, NEMA rating, temperature and pressure range, required sensitivity, optional features and compatibility with existing systems.

Q. How do I install this McDonnell & Miller FS8-W liquid flow switch?

A.

• Select a suitable location on the pipe for this flow switch, ensuring accessibility for maintenance.
• Prepare the pipe as needed, adding fittings and ensuring a secure mounting point for the flow switch.
• Apply thread sealant to the threads for a leak-free connection.
• Securely attach the flow switch to the selected location on the pipe, aligning it properly.
• Use the sensitivity adjusting screw to set the desired flow rate threshold for the flow switch.
• Mount the flow switch securely to prevent excessive vibrations during operation.
• Test the flow switch by flowing fluid through the pipe to verify correct operation.
• Document the installation and calibration details for future reference and maintenance.
• Power on the system after verifying proper installation, calibration and testing.