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HM-30, 90 Series is a level detector with ON/OFF contact signals to detect upper and lower limits
Overview
of vessel. It is firmly designed to be used in high temperature and pressure with excellent
reliability. It is mainly used as a water level detector for boilers of power plants and refining
equipment of petrochemical plants.
HM-30, 90 Series is installed on top of tank or connected chamber and works with
Operating
buoyancy of displacer and tension of spring.
Principles
If the displacer is submerged when the level of measure object rises, it becomes lighter
because of the buoyancy, where the spring that was compressed by the weight of
displacer is released so the core rises within the enclosing tube. The magnet which is
connected with the switch responds to trigger the switch when the core rises.
■ Solid structure and long service life
Characteristic
■ Applicable to high temperature and pressure vessels
■ Current operation state display
■ Customizable with special material (Alloy)
■ Explosion proof version (HM-90-Ex, HM-90H-Ex)
■ ASME B31.1, ASME B31.3 (if chamber design is required)
Spring holder
Extension Spring
Chain (Wire)
Displacer
HITROL CO., LTD.
HM-30, 90 Series
Cover
Base
Enclosing tube
Core
3
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