|
Principle
This principle provides for magnetic wide
switching differential along with altering
of the switching point by moving the
displacers up/down the suspension cable.
Displacer controls can operate under high
pressure conditions because of greater wall
thickness than floats. Displacers are
heavier than liquid and are suspended by
spring. When liquid contracts displacer,
buoyancy force is produced, which changes
the effective weight of displacer; this
causes the spring to retract slightly to a
new equilibrium position. As a result of
retraction of spring, the attraction sleeve
attached to spring move upwards into
magnetic field of external magnet to trigger
the switching action and vice-versa.
Featues & Benefits
- External Cage: As per pressure vessel
design
- Welding: Code qualified and/or LIoyds,
EIL, IBR & PDIL approved.
- Material of construction ASTM, DIN, grade carbon steel or stainless steel
- Approvals: CMRI, EIL, IBR & PDIL.
- Switching Mechanism: SPDT or DPDT
- NACE Option: Available
|
|
Models
Series 700
Series 700 is designed for internal
mounting through the top of the process
vessels. Mounting connections are available
2 ½" NPT and 4" NPT flanges as
standard, other on request.
Pressue
ratings: 143 bar at 40ºC / 40 bar at 250ºC
Specific
Gravity: 0.4 and higher.
Series 800
Series 800 is designed for external
mounting of the process vessels. The
displacer unit is installed inside the
closed chamber. When used with isolation
valves the switch can be isolated from
process during maintenance or plant
start-up.
Pressue
ratings: 275 bar at 40ºC / 40 bar at 250ºC
Specific
Gravity: 0.4 and higher.
Process
Connections: Screwed, Socket Weld. (others
on request)
|
