I: General
The quartz glass tubular bicolour water gauge fabricated by our is a primary meter of water level by using the optical principles and is applicable for steam drum of high and medium pressure boilers and water tanks. When water and steam coexisting in the water Side of the gauge is green in colour, the steam side is red in Full of water, the whole tube turns green, if the gauge is fullof steam it turns red. Thus it has thoroughly solved the problem of failure to display the sta us of full water or steam of other ordinary water
Gauge and may avoid possible serious accident ynduced therdby. Furthermore our product is safe reliable simple in construction and convenient for maintenamce.

II: Technical Parameter
Model, Normial Pressure Mpa, Working Temperature, Centres of Flange Mm, Readable
Length Mm, Specification Of Flange
SF304, ≤ 10, 0~450, 400~600mm, 200~300mm, PN10 DN20
SF303, ≤ 10, 0~450, 400~600mm, 200~300mm, PN10 DN20
Note:
Special length of water level gauge is acceptable.

III: Construction and principles
Bicolour water gauge consists of upper valve, lower valve, gauge body, blow off valve, balancing tube and lamp house.
The upper valve and lower valve can be fully opened and closed by Hand. Inside the valve body. There is a safety steel ball and sufety valve seat. When the quartz glass rube is broken suddenly, the steel ballwill remove to the safety valve seat in high speed pushed by high pressure steam to shut off the channel of the gauge automatically until the upper and lower valves is cosed by hand. The ball will be reset by the pres-sure from the balancing tube and by its gravity. Therefore, false water level can be avoided. The gauge is provided with special safguard, so it is safe and reliable, the gauge body itself is also a very good protection shade. The insallation of quartz tubular bicolour water gauge is the same as Ordinary valve but the following should be noted.

Parameters