FW Murphy BLSK1 Series Bilge Level Switch System

The FW Murphy BLSK1 Series Bilge Level Switch System is engineered to operate bilge pumps or alarms, offering a robust solution for monitoring bilge water levels in marine environments. The system includes essential fittings for installation, allowing users to select specific parts as needed.

System Operation and Design

This system utilizes the proven Air Cell actuating mechanism, ensuring that all moving parts and switching components are situated remotely from bilge liquids. This design choice protects them from corrosion and rust, as all wetted parts are constructed from non-corrosive materials. The operation involves the capture of an air column within the MAC1 Air Volume Cell. As the bilge water level rises, it compresses this air column, generating pressure against the diaphragm of the BLS1 Bilge Level Switch, which then activates the switch. The switch's set point is adjustable, and it automatically resets once the bilge is pumped out, allowing the air cell to recharge during normal operation.

Construction and Materials

The BLS1 switch is built for durability in marine conditions, featuring bodies and covers made from aluminum or bronze, and a Buna-N diaphragm, materials known for their resistance to marine atmospheres.

Product Details and Ordering

The BLSK1 series is available as a comprehensive kit, which includes the BLS1 switch, MACT1 tubing kit, and MAC1 air cell. Individual components and accessories are also available:

• BLS1 Switch (Part Number 15000587)
• BLSK1 Kit (Part Number 15700193)
• Optional Mounting Bracket (Part Number 15050737)
• Accessories and replacement parts are also listed, including diaphragm assemblies and pistons.