A15-2E2B-BKB datasheet(2/28 Pages) MAGNETROL

2 / 28 page

Operation is based upon simple buoyancy, whereby a

spring is loaded with weighted displacers which are

heavier than the liquid. Immersion of the displacers in

the liquid results in buoyancy force change, which

moves the spring upward.

Since the spring moves only when the level moves on a

displacer, spring movement

is always a small fraction

the level travel between displacers

A magnetic sleeve

is connected to the spring and

operates within a non-magnetic barrier tube

. Spring

movement causes the magnetic sleeve to attract a pivot-

ed magnet

, actuating a switch mechanism

located

outside the barrier tube. Built-in limit stops prevent over

stroking of the spring, under level surge conditions.

T E C H N O L O G Y

Falling

Level

Rising

Level

Pivot

Return

Spring

P R

R O

O O

O F

F -- E

E R

C O N T R O L S

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 chain. A spring-loaded lever arm then lifts

the switch actuator simulating a high or high-high level

condition. When the chain is released, the PROOF-ER

returns the actuator to its previous position to resume nor-

mal operation.

D I S P L A C E R S

Stainless steel displacers are rated 720 psig @ +100° F

(50 bar @ +38° C).

Karbate displacers are limited to a minimum temperature

of +32° F (0° C) and a maximum temperature of +300° F

(+149° C).

Do not use porcelain displacers on non-vented boiler

water condensate systems over +200° F (+93° C). Stainless

steel or Karbate is recommended.

D I S P L A C E R S

S U S P E N S I O N

C A B L E

Displacers are field-adjustable at any point along the

suspension cable (10 feet (3 meters) 316 stainless steel is

standard). Monel® and Hastelloy® materials are available.

Consult the factory for longer lengths.

F L O A T I N G

R O O F T O P

C O N T R O L S

The floating rooftop control is designed for installation on

“barrier” (floating roof) tanks. The control will be fur-

nished with a brass weight displacer to prevent sparking.

A hollow brass displacer is required if the control is to

actuate in liquid as well as by the barrier. Consult factory

for other options.

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