Model 765

SKU: 765

Float Switch, External Cage, Vertical, Two Point

The Model 765 Float Switch has a float differential range of up to 72 inches and utilizes two switch stations. This design allows both monitoring and shutdown operation of critical liquid levels with a single control. It can provide a ‘High’ alarm, plus a ‘High-High’ shutdown action with one control unit.

The 765 float inside the cage rests on the surface of the liquid and rides up and down as the level changes. An attractor is attached to the float and also moves with the station magnet. When the level rises, the attractor is moved up into the field of the switch station magnet. The magnet is free to move and is pulled in against the side of the nonmagnetic sealing tube. The output switch is actuated by the movement of the magnet. If the level continues to rise, the attractor is pushed into the field of the upper switch station magnet and that output switch is actuated.

Similarly, when the liquid level falls the attractor is sequentially pulled out of the field of each magnet. The magnet moves back to its original position and the output switch is deactuated. Note that extra power (greater specific gravity [SPG]) is required for operating the second switch station.

Option: The Model 765 Option D body, mechanism, and float utilizes a single switching station. The station activates when the sensing float rises to the upper stop and lifts the guide rod attractor into the field of the station magnet. The station stays activated until the float moves down against the lower stop. The guide rod attractor is then pulled down out of the magnetic field and the switch station deactivates. It remains in that condition until the float again rises up against the upper stop and activates the switch.

Features

  • Exterior barrer tube switch station
  • Designed in accordance with ANSI B31
  • Low specific gravity operation
  • Insensitive to high frequency vibration

Specifications

  • Available Wetted Materials: 304 Stainless Steel, 316 Stainless Steel, carbon steel
  • Switch Action: From 1 to 4 points of alarm and/or differential
  • Differential: ≤ 72 in (1.83 m)
  • Specific Gravity: 0.4 to 2.40
  • Temperature:-20 °F to +750 °F (-29 °C to +399 °C)
  • Pressure: -15 psig to +2200 psig (-1 bar to 151.6 bar)
  • Optional Drain:0.75 in NPT
  • Process Connection:
  • Orientation: Side/Bottom, Side/Side, Side/Side/Drain
  • Socket Weld:1.0 in
  • Threaded: 1.0 in FPT
  • Flanged: 1.0 to 2.0 in
  • Rating: ≤ 600 lb ANSI 2 in Greyloc® clamp hubs DIN or JIS equivalents

Certifications & Approvals

  • Third Party Listed by CSA NRTL/C (USA and Canada)
    Class I, Division 1, Groups B, C and D;
    Class II, Division 1, Groups E, F and G;
    Class III, Division 1
    Class I, Zone 1, Ex d IIB+H2
    Class I, Zone 1, AEx d IIB+H2

Required Ordering Information

  • Detailed model number
  • Tag or nameplate detail (if required)
  • Documentation/testing tiers (if required, refer to Additional Resources in the product catalog)
  • Process fluid or material name
  • Process fluid or material dieletric constant
  • Maximum process temperature
  • Maximum process pressure
  • Upper and lower materials required for interface service

Additional Information

Subheader

Float Switch, External Cage, Vertical, Two Point

Level Measurement

Point

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