HM-90&95-Ex Series
HITROL CO., LTD.
3
Overview
Features
Applications
Operating
Principles
■ Solid structure and long service life
■ Applicable in high temperature and pressure
■ Current operation state display
■ Customizable with special material (alloy)
■ Pressure-resistant and ex-proof type available
■ ASME B31.1, ASME B31.3 (If chamber design is required.)
HM-90&95-Ex Series is a level detector with ON/OFF contact signals to detect upper and
lower limits 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-90 Series is installed on top of tank or connected chamber and works with buoyancy of displacer and
tension of spring. 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.
■ Feedwater heaters ■ Steam drums
■ Condensate drip Pot ■ Flash tank
■ Separators ■ Receivers
■ Accumulator
Displacer
Chain(wire)
CORE
ENCLOSING TUBE
Base
Cover
Spring Holder
Extension
Spring