Murphy DF755 Hydrostatic Head Level Switch

Description

The DF755 Level Switch is a diaphragm-operated hydrostatic head pressure level switches. A pressure sensitive diaphragm operates a snap-switch that can be wired directly to electric pilot circuits to control pumps at predetermined levels. Typical application is to start and stop electric driven pump(s) to maintain tank levels. It is also applicable to engine-driven pumps. The nitrile sensing diaphragm is impervious to most liquids and is sensitive enough to control levels with 1/4 in. (6 mm) repeatability. See model descriptions for limits of switch trip point adjust ability. Materials include aluminum body, glass-filled nylon bottom plate and a special alloy leaf snap switch as standard. This simple level switch is highly reliable and can be worked into almost any new or existing system without major modification or special tools. The DF755 is suitable for atmospheric tanks in a nonhazardous area. The SPDT snap-switch for the DF755 is preset for a 4 in. (102 mm) differential in liquid level.

For use in:

• Saltwater Disposal Systems
• Cooling Towers
• Crude Oil Tanks
• Waterflood Systems
• Diesel Day Tanks
• Sumps

SPECIFICATIONS:

• Snap Switch Ratings
• SPDT
• 15 A @ 125, 250 VAC
• Case/Lid: Aluminum
• Bottom Plate: Glass-filled Nylon
• Process Connection: 1 NPT
• Maximum Pressure Rating: 25 psi (172 kPa [1.72 Bar])
• Conduit Connection (electrical): 1/2 NPT
• RoHs Compliant