ICI - Innovative Creations, Inc. AX - Manual (Page 6)

ACCESSORIES
4
2 ACCESSORIES
AX steam boilers are fitted with a series of accessories that can be subdivided as follows:
• Safety accessories (safety valves, water level limits, safety pressure switches).
• Observation accessories (level gauge, pressure gauge, flame inspection).
• Control accessories (level ad pressure switches).
• Feed water accessories (centrifugal pump, injector or alternating steam pump).
• Manual operation accessories (stop valves, purge valve).
In the following description the accessories are subdivided as to the physical parameter they control
(pressure and level).
2.1 PRESSURE
2.1.1 Pressure gauge (Fig. 2)
The pressure gauge is Bourdon type consisting of a flat elliptical
section metal tube, bent to an arc. One end of the tube is open
and communicates with the boiler where the pressure is to be
measured; the other end, closed and free to move is connected by
a lever system to a toothed arc and to the gauge indicator hand.
The gauge shows in red the design pressure.
The gauge is carried on a three-way valve to allow the following
operations:
• Communication between boiler and gauge (normal operation
position).
• Communication between gauge and the atmosphere (position
necessary to purge the siphon).
• Communication between the boiler, the gauge and a test
gauge (position necessary to verify the gauge).
Fig. 2