Model 717D

SKU: 717D

Displacer Switch, Top Inserted, Three Point, Differential

Operation: The weight of a displacer is supported by a spring. Variations in liquid level cause the displacer to move up and down. Switching action occurs as the level passes each displacer.

Uses: High and/or low alarm; single and multiple pump control

Insertion and Switching band: up to 50 feet maximum

Switch action: From 1 to 4 points of alarm and/or on-off pump control

Specific Gravity: form 0.25 to 2.4 SGU

Temperature: from –20 to 500°F

Pressure: from –15 to 2200 PSIG

Process Connection: 3″ to 4″ NPT threaded; 3″ to 12″ flanged up to 1500# rating; ASA, DIN, or JIS style


Model 717D Product Diagram - Delta Controls Corporation

The Delta Controls Model 717D utilizes a mechanism and displacer similar to the Model 717A three-point alarm. The difference is that an adjustable differential device has been added, and only two switch stations are utilized

The lower switch station is activated when the liquid surface covers the middle displacer, and stays activated until the liquid level falls below the bottom displacer.

A typical application is to control a single pump with a high or low level alarm.

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