SERIES 762-30 HIGH PRESSURE LEVEL ALARM
HIGH RELIABILITY - MECHANICAL SIMPLICITY
Download the Delta
Controls Model 762 Detailed Datasheet 
Note: You will need the Acrobat Reader to view the data sheet. 
FEATURES
- Mechanical Simplicity Produces Maximum Reliability
- Designed In Accordance With ANSI B31 Or Other
- Radiography And Dye Penetrant Testing
- Hydro Pressure Test At 150% Of Design Pressure
- 100% Operational Testing
- Low SPG Operation; To 20,000 PSIG Basic
- Interface Detection At Very High Pressures
- Insensitive To High Frequency Vibration
- No Seals To Leak, Magnetically Coupled
- No Plastic Displacers To Dissolve Or Fail
- Material Certificates, Mill Test Reports, And Test Documents Provided To User
OPERATION
The Delta Controls Models 762-33,-34,-35 & -38 Controls provide output switching at one elevation of a varying liquid level. The unit has its primary element mounted outside the process vessel. The external cage design is utilized to minimize process turbulence effects and in order that the level control may be valved off from the process vessel and depressurized for maintenance without disturbing the operation of the process. The output of the control consists of a switching action as the liquid level passes.
The liquid level rises and the displacer lifts the attractor in front of the switch station magnet. The magnet pulls in and the output switch is actuated. Decreasing liquid level moves the displacer/rod/collars downwards. The output switch deactuates when the attractor is pulled out of the magnetic field.
SWITCH STATION AND DISPLACER
The switch station is on the outside of the barrier tube and is isolated from the process liquid. It is equipped with a magnet whose lines of force pass through the nonmagnetic barrier tube. The magnet is pulled in against the outside of the tube and actuates the microswitch when the attractor is lifted into the magnetic field inside the tube.
This unit utilizes thick wall displacers for sensing elements. The support spring offsets most of the displacer weight so that liquid buoyancy requirements are minimized. It is designed for services with low specific gravity liquids and very high pressures.