B69H super high pressure double color water level gauge for boiler

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B69H super high pressure double color water level gauge for boiler is a direct reading liquid level meter designed and produced by using different refractive indices of water and steam.When the red and green light emitted by the light source reaches the observation window, the red light in the vapor phase part is directly in front,While the green light is slanted to the liquid level gauge body to be absorbed, while in the liquid phase, the green light is directly in front due to the refraction of water,The red light slanted to the liquid level gauge body was absorbed, resulting in the display results of vapor red and aqua green, vapor full red and water full green in the observation window of the liquid level gauge.This type of level gauge is mainly used in water level observation of steam boilers or other pressure vessels.

B69H super high pressure double color water level gauge Long window type two-color water level meter light source adopts LED cold light source, which has the advantages of high luminous rate, pure color, environmental protection, energy saving, high temperature resistance, maintenance-free, long life and so on, so as to make the water level observation more clear. And according to the requirements of explosion-proof site working conditions, explosion-proof light source can be selected to completely meet the requirements of explosion-proof site.

Long window type two-color water level gauge the gasket is made of flexible graphite glued on and off the toothed corrugated skeleton to enhance the sealing property, thus ensuring the safe and reliable operation of the equipment and improving the service life. Mica sheet is used to protect the window glass in the window component of two-color water level gauge. Mica has high chemical stability, strong compressive resistance, high temperature resistance and corrosion resistance, thus improving the service life of the window component.

Strong flushing function (no flushing) :
A condenser is arranged at the top of the gauge body. When the saturated steam in the drum flows through the condenser, the cooling function of the condenser is utilized to form a large number of pure water without salt. The pure water continuously washes the observation window along the inner surface of the two columns of Windows, forcing the dirt attached to the observation window mica to be washed away. At the same time, a large amount of pure water formed returns to the body cavity and constantly replaces with the saturated water in the body. Finally, the saturated water in the body cavity becomes pure water without salt or impurities, so that the window is free from scale, and the color display is clear and lasting, which improves the observation effect and extends the service life of the window components.

B69H super high pressure double color water level gauge parameter

Center to center distance	on order
Nominal pressure	16-32MPa
working temperature	saturated steam
Connection size	OD28x4mm welding or made on needs
Display	Red for air, and green for water
Lamp type	LED with power: 220VAC
Type	A. with two line glass window, no interrupt zone for level view.
Type	B. With one line glass window, have interrupt zone.

Key Terms Glossary
boiler steam drum
mica bi-color water level gauge
communicating vessel principle
high temperature & high pressure
sight window mica liner
anti-corrosion & anti-erosion
red for steam, green for water
explosion-proof ball safety valve
power station boiler
direct-view reference gauge

Applications of B69H Mica Two-Color Water Level Gauge

1. Core Application: Thermal Power Station Boiler Drums

It is the standard on-site direct-reading level instrument for high-pressure, superhigh-pressure and subcritical power station boilers (10MW–1000MW generating units).

Working condition matching: withstand pressure up to 32MPa, saturated temperature up to 550℃, perfectly fit large utility boiler drums.
Core function: serve as the primary safety reference water level gauge during boiler startup, shutdown and full-load operation; calibrate differential pressure transmitters, electrode level gauges and other remote measuring instruments regularly.
Optional TV monitoring system: synchronously transmit clear red-green water level images to central control room for unattended monitoring抖音百科.

2. Medium & High-pressure Industrial Steam Boilers

For chemical plant boilers, textile heating boilers, heating power plant boilers, waste heat recovery boilers with pressure ≥2.5MPa:

Mica sheet lining resists steam corrosion, scaling and thermal shock far better than ordinary flat glass, extending maintenance cycles greatly.
Compensated staggered multi-window design eliminates observation blind zones, stable reading under frequent load fluctuation and temperature alternation.

3. High-pressure Steam Pressure Vessels in Petrochemical Industry

High-pressure feedwater heaters, deaerators, steam separators, condensate tanks in refineries and chemical factories.
High-temperature steam buffer tanks, reaction auxiliary containers requiring real-time on-site liquid level observation.
Explosion-proof versions are available for flammable, explosive chemical production zones.

4. Special Industrial High-temperature & High-pressure Equipment

Waste heat boilers of metallurgy, steel and cement kilns

Under severe vibration, sharp temperature change and high dust environment; mica window is crack-resistant against thermal shock compared with quartz glass level gauges.
Thermal oil furnaces & high-temperature heat medium storage tanks

Adapt to long-term high-temperature medium erosion, stable two-color display without fogging on observation windows.
Cogeneration units and central heating large boiler rooms

Long-distance visible red-green interface (steam red, water green), easy inspection by patrol operators day and night without extra lighting.

5. Safety Compliance Application Scenarios Mandated by National Boiler Codes

Must be installed as direct visual monitoring equipment on all high-pressure boilers, used to judge water shortage/water overflow dangerous faults which remote transmitters may misjudge.
Built-in self-sealing steel ball cocks: automatic blockage if mica window ruptures, preventing high-temperature steam and hot water ejection to avoid scalding accidents.

6. Application Advantages Matching Working Conditions

Mica isolation layer separates high-temperature steam from observation glass, effectively slowing corrosion and scaling; suitable for boiler feedwater with slight alkalinity and chemical dosing.
Modular multi-window structure (3/5/7/9/11 windows) with customizable center distance to match various boiler drum installation sizes.
For long-term continuous operation equipment, maintenance cycle reaches 1–2 years, far less downtime than transparent/reflex glass plate level gauges.

Short Product Introduction Version (for Catalog)

The B69H mica two-color water level gauge is specially designed for high-temperature & high-pressure working conditions. It is widely applied to power station boiler drums, medium/high-pressure industrial boilers, deaerators, high-pressure heaters and petrochemical steam pressure vessels. With mica anti-corrosion lining and blind-free two-color display, it acts as the key on-site safety level monitoring instrument for all kinds of high-pressure steam equipment, supporting remote TV video monitoring and explosion-proof customization.