 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
A15-2E2R-HM7 Datasheet(PDF) 4 Page - Magnetrol International, Inc. |
|
||||||||||||||||||||||||||||||
A15-2E2R-HM7 Datasheet(HTML) 4 Page - Magnetrol International, Inc. |
|
|
4 / 40 page  4 45-610 Displacer Type Liquid Level Switches and Proof-er® Switches 1 5 2 3 4 32 1 Figure 1 Switch position on rising level 1 5 2 3 4 32 1 Figure 2 Switch position on falling level 1.0 Introduction Displacement type level switches offer the industrial user a wide choice of alarm and control configurations. These units utilize simple buoyancy principle and are well suited for simple or complex applications. 1.1 Principle of Operation 1.1.1 Displacer Controls The design of displacer operated level switches is based upon the principle that a magnetic field will not be affected by non- magnetic materials such as 316 stainless steel. In this case, the displacer moves a magnetic attraction sleeve within a non-mag- netic enclosing tube and actuates a magnetic switch mechanism. The enclosing tube provides a pressure seal to the chamber and, therefore, to the process. 1.2 Operating Cycle A spring is loaded with a weighted displacer which is heavier than the liquid. Immersion of the displacers caused by rising liquid level imparts buoyancy forces on the displacer allowing the spring to compress. The attraction sleeve attached to the spring, moves upward into the field of a permanent magnet . The movement of the magnet toward the sleeve causes the switch to actuate. A non-magnetic barrier tube provides a static pressure boundary between the switch mechanism and the displacer assem- bly. As the liquid level falls, the displacer lowers, causing the spring to extend, and moving the attraction sleeve out of the magnetic field of the switch mechanism. This allows the switch to again change position and to break or make. See Figures 1 and 2. 1.3 Floating Roof Detection The spring is loaded with a displacer weight suspended from a stainless steel cable. As the floating roof rises, the weight is lifted by the roof allowing the spring to compress, the attraction sleeve to move upward into the field of the switch magnet and the switch to actuate. As the roof lowers, the weight again hangs free causing the spring to extend, the sleeve to move downward and the switch to reset. The displacers are usually fabricated from ductile metals, such as brass, to prevent sparking when the displacer makes contact with the roof. 1.4 Operating Cycle — Proof-er Control Option The purpose of the Proof-er is to check the operation of a displacer control without having to raise the level in the tank. This is accomplished by pulling downward on the Proof-er cable. This causes the spring loaded lever arm to lift the switch actuator, simulating a high or high–high level condition. When the cable is released, the Proof-er returns the actuator to its original position resuming normal operation. |
Similar Part No. - A15-2E2R-HM7 |
|
Similar Description - A15-2E2R-HM7 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
