Boiler sight glass

Boiler water glass with VAT invoice Boiler water glass has the function of measuring and observing the hot water level inside the boiler body that is operating at high temperature and high pressure, helping the boiler operator to pump water into the boiler in time to avoid the boiler running out of water while still operating. Boiler water glass is made in China, so the price is super good, the quality is not as good as German Maxos water glass. This boiler water glass has a simple structure with a clear glass body that makes it easy to see the water level inside the glass body

There are grooves for easy observation of the water level. This water glass comes with a heat-resistant gasket installed on the inside and outside of the glass. This gasket will be given for free or will be charged extra depending on each different sales company

Boiler water glass specifications

Reflex type boiler water glass can withstand a maximum of 320 degrees C and 608 degrees F for superheated steam and has additional mica protection. Maximum pressure resistance 103 bar

Reflex boiler glass can withstand a maximum temperature of 243 degrees C 470 degrees F for saturated steam. Maximum pressure resistance 35 bar

Boiler glass has dimensions such as 165x34x17, 190x34x17, 218x34x17, 250x34x17, 280x34x17, 320x34x17, 340x34x17, 370x34x17, 400x34x17, 218x30x17, 250x30x17, 280x30x17, 320x30x17, 340x30x17, 115x34x17, 140x34x17mm…. How to choose the size depends on the valve set you are using or Phat Dat can advise you for free. You can see more sizes in the table

Sight Glass or also known as Round Sight Glass

Sight Glass, whose material can be soda-lime, borosilicate or quartz, has different sizes and applications. The difference between soda-lime, borosilicate and quartz is the different silicon dioxide content. The more silicon dioxide it contains, the stronger the Sight Glass is in thermal and optical properties.

The diameter of the Sight Glass can be from 5 mm to 1000 mm. The thickness can be from 0.3 mm to 40 mm. Compared with other products of the factory, the surface of the Sight Glass is polished and bubble-free and the edge is precisely rounded and polished. Moreover, the Sight Glass can work in very high temperature environment as well as acid and alkaline environment. In addition, as optical glass, the light transmittance of the Sight Glass can reach 93%.

With good thermal, mechanical and optical properties, the Sight Glass is widely used in instruments, LED lamps, optical industries, etc.

Specifications of Sight Glass

Material: soda-lime, borosilicate, quartz.
Diameter: 5 mm - 1000 mm, according to customer requirements.
Thickness: 0.3 mm - 40 mm.
Surface treatment: polishing, flat.
Edge treatment: grinding, polishing.

Corrosion resistance
The sight glass especially quartz can resist acid and alkali. Quartz does not react with any acid, except hydrofluoric acid.
High Working Temperature
Soda-lime sight glass can work at high temperature of 450 °C and Quartz sight glass can even work at 1200 °C for a long time.
High Light Transmittance
The light transmittance of quartz can reach 95%.
Polished Surface
No bubbles or scratches and the surface is flat, clear and polished.
Perfect Edge Processing
Precisely rounded edge. Can be ground and polished. Polished edge is smoother.

Measuring Principle of Boiler Glass

Reflex type boiler glass works on the principle of refraction and reflection of light through a specially designed prism glass. The glass has ridges on one side, facing the liquid and reflecting light differently depending on whether they are in contact with liquid or vapor. This makes it easy to distinguish the liquid level in the tank with the naked eye.

Reflective level gauges are specifically designed to provide a clear visual indication of the liquid level in a vessel by exploiting the differences in the optical properties of liquids and gases (vapors). The design and function of the level gauge is optimized to differentiate between the liquid zone and the gas (or vapor) zone. Here is how these zones are defined and function in the context of a reflective level gauge:

Liquid Zone

In the liquid zone of a reflective level gauge, the prism glass face on the front of the level gauge is in contact with the liquid. The prisms are designed so that when liquid is present, it fills the glass channels and allows light to pass through with minimal reflection. This makes the liquid zone appear dark when viewed from the front. The reason for this darkness is due to the absorption of the liquid and minimal reflection of light, enhancing the visibility and contrast between the liquid zone and the gas zone.

Gas/Vapor Zone

In contrast, in the gas or vapor region, there is no liquid filling the grooves in the prism glass. The structure of the glass causes the incident light to reflect significantly due to the presence of air or vapor. This reflection causes the gas/vapor region to appear brighter or silvery, in sharp contrast to the darker liquid region. This distinct visual difference makes it easy for the operator to determine the exact liquid level inside the tank or vessel.

Transfarent Boiler Level Glass

Transfarent boiler level glasses are a simple design consisting of a transparent glass tube through which the amount of liquid in the vessel can be directly observed. This type of boiler level glass allows observation of not only the liquid level but also the characteristics of the liquid, such as color and clarity.

Transfarent boiler level glasses are designed for direct observation of the liquid level in vessels and containers. The construction of these glasses is relatively simple, with an emphasis on visibility and durability.

Components:

Glass: The core component of a clear level gauge is one or more pieces of clear, sturdy glass. This glass needs to withstand the pressure, temperature, and chemical nature of the fluid it comes into contact with. Typically, they are made from borosilicate glass and are highly resistant to thermal shock and chemical corrosion.

Body: The body of a boiler level gauge is usually made from metal, such as stainless steel or brass. It houses and protects the glass and includes a chamber that aligns with the level of the fluid in the tank.

Seals and gaskets: Seals and gaskets prevent leakage and secure the glass inside the body. They are typically made from materials such as Teflon, Viton, asbestos, and lead and are resistant to heat and chemical degradation.

Valve: Valves are incorporated into the design to isolate the level gauge from the fluid during maintenance or in the event of glass breakage. These valves usually have a safety mechanism that automatically shuts off the flow if the glass breaks.

Vent and drain plug: To facilitate maintenance, cleaning and draining of the meter, a vent and drain plug is included in the design.

The most common use of a boiler sight glass is to measure water levels in steam boilers. In this context, a water level glass serves as an important component of the water level control system of a steam boiler. Its function is to provide a visual means for the operator to monitor and verify the actual water level in the boiler system. This water level glass is connected to the boiler at two points: the top and the bottom. The water inside the boiler will settle at the same height as in the water level glass, providing an accurate reflection of the boiler water level.

A boiler sight glass is used to measure the water level in a boiler according to the communicating vessel principle. When the sight glass is installed in a boiler sight glass assembly, this sight glass assembly has valves at both ends. When the valve is opened, hot water from the boiler flows into the sight glass assembly and the sight glass will indicate how full or empty the boiler is.

The operator can use this visual representation to safely manage the water level inside the boiler. For example, if the water level is too high, it can lead to inefficient operation and the possibility of overflow. Conversely, if the water level is too low, it can lead to overheating and the possibility of boiler damage.

The ability to accurately monitor the boiler water level using a sight glass is crucial for safe and efficient boiler operation. It allows the operator to add or reduce water as needed, maintaining the correct operating level and avoiding potential risks associated with incorrect water levels.

Fields of Application of a Boiler Sight Glass

Reflex sight glasses are mainly used in industries where accurate level measurement is critical under high pressure conditions. Common applications include boilers, feedwater heaters, oil/water separators and other vessels in the chemical, petrochemical and process industries.

This type of transfarent boiler sight glass is commonly used in tanks or vessels where visual inspection of the liquid is advantageous. Applications can be found in the food and beverage industry, pharmaceuticals and any application involving corrosive liquids where the operator must observe the physical properties of the liquid in addition to the liquid level.

Boiler sight glass is installed in most industrial boilers in food processing factories

Boiler sight glass is used in coffee production and processing factories

Boiler sight glass is used in wood processing factories

Boiler sight glass is used in textile and garment factories

Boiler sight glass is used in seafood processing factories

Boiler sight glass is used in animal feed factories

Boiler sight glass is used in chemical processing factories

Boiler sight glass is used in thermal power plants

Boiler level gauges are used in coal plants

Boiler level gauges are used in packaging manufacturers

Boiler level gauges are used in beer and soft drink factories

Boiler level gauges are used in milk processing factories

Boiler level gauges are used in oil refineries and oil production plants

Boiler level gauges are used in paper factories

Boiler level gauges are used in cooking oil factories

Boiler level gauges are installed in stainless steel tanks in the field of tank manufacturing

Boiler level gauges are installed in industrial gas tanks in the field of gas production

Boiler level gauges are installed in drying ovens and kilns in the field of steel and corrugated iron production

Boiler level gauges are used in ceramic tile factories

Limitations of Reflex level gauges

Main limitations of Reflex level gauges is their use with certain liquids. They are less effective with very clean or demineralized liquids, where the difference in refractive index between the liquid and vapor phases is minimal. Additionally, over time, the glass may be corroded by corrosive liquids or clouded by deposits, requiring frequent maintenance or replacement.

The ability to observe through a clear level glass may be hindered by deposits or scale, requiring frequent cleaning. Furthermore, these glass glasses are not suitable for opaque or very thick liquids with limited transparency. They also tend to be more fragile than other types of glass glasses and are limited in their application due to the maximum pressure and temperature the glass can withstand.

Choosing the right type of gasket or gasket for a Boiler Glass

Do you know how to choose the right gasket for this boiler glass?

Gaskets for boiler glass are mainly used to isolate the glass and liquid of the Water Level Glass Valve Assembly. Gaskets mainly include the following types:

Asbestos gaskets
Asbestos gaskets can withstand temperatures up to 500 degrees Celsius, pressure up to 150 bar, thickness 2mm. But asbestos is toxic, if inhaled asbestos fibers can cause lung cancer, asbestosis. Therefore, Phat Dat recommends that you should not use this type of gasket

Heat-resistant graphite gaskets (Including pure graphite gaskets, iron-graphite gaskets, stainless steel-graphite gaskets)
Heat-resistant graphite gaskets Graphite can withstand temperatures up to 600 degrees Celsius, working pressure 150 bar, thickness 2-3 mm

Mica gaskets (better corrosion resistance)
Mica gaskets have working temperatures up to 600 degrees Celsius, pressure up to 350 bar. It protects the inner surface of the boiler sight glass from erosion caused by chemical abrasion and corrosive chemical effects of alkaline solution, boiler water. It provides excellent sealing strength against acid, water, oil at high temperature pressure and completely eliminates the risk of cracking…of the boiler sight glass

PTFE Teflon gasket
Teflon gasket is heat-resistant up to 250 degrees Celsius, anti-corrosion, resistant to acid and alkaline organic solvents, non-toxic to humans.

For different types of boiler sight glass, the available gaskets are also different: for Reflex sight glass, the available gaskets are asbestos gasket, and lead gasket; For transferent transparent flat sight glass, all the above types can be selected.

Phat Dat can provide the above gaskets for boiler sight glass. And we can customize according to the user's size. If you need, you can contact our sales staff to get a quote.

How to Install a Boiler Level Gauge into a Boiler Level Gauge Assembly

Here is a step-by-step method to install a Reflex Level Gauge or Transparent Level Gauge

Step 1: Separate the Boiler Level Gauge from the Pressure and Release the Pressure

First, you need to separate the Boiler Level Gauge from the pressure of the tank that the Boiler Level Gauge is attached to. Then, you should release the pressure inside the Level Gauge to ensure there is no pressure inside. In this way, you will not be sprayed with liquid or hot steam during the process of disassembling and removing the Boiler Level Gauge.

Step 2: Loosen the Bolts on the Faceplate

Next, you should loosen the bolts on the faceplate of the Boiler Level Gauge with a wrench. Alternatively, your Boiler Level Gauge may have tightening bolts located on the back and a simple cover plate on the front. Regardless of where they are located, you need to loosen and remove them.

Step 3: Remove the components of the Boiler Glass

In this step, you should remove the components of the Boiler Glass, including: nuts and bolts, masks, gaskets

Step 4: Clean and check the parts of the Boiler Glass

You have planned to replace the Boiler Glass, so you can also check the other parts of the Boiler Glass to make sure they are working properly. Parts such as the cover plate and steel body, the rotary valve to lock and open the hot water may just need a little cleaning

Step 5: Attach the new heat-resistant gasket to the Boiler Glass

4.642 / 5.000

Always replace the heat seal when you install a new boiler sight glass. These seals wear and loosen over time, reducing the seal inside the boiler sight glass and increasing the chance of leaks. Step 6: Reinstall the Boiler Sight Glass into the Boiler Sight Glass Assembly Once you have cleaned all the parts and have the new seal and Boiler Sight Glass, it is time to reassemble the boiler sight glass. Install all the parts in the correct order in the reverse order of how you removed them: the steel body, the seal, the boiler sight glass, the seal, and finally the faceplate. Secure the last part – the faceplate – in place with the nuts and bolts. Use a torque wrench for this step and tighten the bolts in a diagonal motion so that the torque is applied evenly to each bolt. The manufacturer of the sight glass will recommend the correct torque. What to do when the boiler water glass assembly is leaking During the operation of the boiler water glass assembly installed on the boiler. One fine day, you hear a hissing sound coming from your boiler water glass assembly. Along with that, you observe the amount of hot steam escaping from the water glass assembly, which is dangerous for others. How to handle this case is as follows: The first thing is to lock the hot steam being supplied to the water glass assembly by turning off the boiler or locking the valve on the pipe (depending on the location where you install the boiler water glass assembly). Remove the bolts of the two flanges on the boiler water glass assembly, remove and move the boiler water glass assembly out of the boiler. The case of the water glass assembly leaking hot steam is mostly due to the fact that after a period of operation, the gasket or gasket is corroded by boiler water or boiler water corrodes the glass part in contact between the boiler water glass and this gasket. You should replace the gasket and the new boiler level glass. To replace the boiler level glass and gasket, see the section How to install the Boiler Level Glass into the Boiler Level Glass Assembly Differences between Boiler Level Glass and Magnetic Level Glass Main Difference: The main difference between these two types of Boiler Level Glass can be found in the safety that the Magnetic Level Glass provides. Through the use of special gaskets made of MICA. The transparent level glass can also be used in systems with stronger liquids, but glass is always a danger point when compared to the sealed tube that makes up the magnetic level glass. In fact, the latter is recommended when it comes to testing toxic liquids. An additional level of safety can also be achieved by equipping the Magnetic Level Glass with a camera. This allows the level to be detected remotely, from the control room, without having to be physically present at the plant. It also gives you the ability to remotely activate electrical circuits. If maintenance costs are considered, the Magnetic Level Glasses are still the best choice, as their maintenance costs are almost zero. But if using a Glass Level Glass, wear of the insulating gaskets for the glass, as well as the glass itself, must be taken into account. Although the cost is very low, in installations with multiple Boiler Level Glasses, costs can add up. Magnetic Level Glasses can also be made with longer connections, as Glass Level Glasses, longer than 4 inches, will experience bending that can damage the glass Although they are used in similar applications, the differences between these Level Glasses are significant and affect not only the safety of the plant but also the maintenance costs of the plant. How much does a Boiler Level Glass cost? Boiler glass is super cheap because Phat Dat imports directly without intermediaries. Please contact Phat Dat so that the sales department Ms. Huong Quynh can quote you immediately. The price on the website applies to quantities of 100 or more. Where to buy boiler glass? There are many places selling boiler glass on the market today. You should choose a reputable supplier with many years of experience in the market because they will ensure to provide good prices, good quality products and technical advice on accurate use based on actual experience. You can come to see and buy products at Phat Dat company office or we can deliver to customers COD delivery Customers can open the box to see the goods comfortably Return goods quickly in a flash In addition, Phat Dat also accepts processing and assembling the entire boiler glass valve set including the flange at the 2 ends in the middle is glass and has a red hand valve to lock and open the water Contact 0975052273 zalo  0906363933  0966485673  0989286139 Https://www.youtube.com/channel/UC6b-Js97gd9-JgfVwwN-Dgw Web: www.phatdatcompany.com How to pack the boiler glass?

Because the boiler glass is made of glass, the possibility of breakage is high. When delivering to provinces outside of HCM, Phat Dat packs these glass glasses with shock-proof nylon, then puts the glass glasses in a foam box, with shock-absorbing foam between the layers of glass to protect the glass inside. Phat Dat delivers very safely, confident that the glass glasses will not break when delivered long distances

How to deliver boiler glass glasses?

Phat Dat delivers boiler glass glasses using Grab, Bee, Lalamove car booking services. After agreeing on the price, you agree to buy the goods, we will ask for your address and phone number to book a car to deliver to you within Ho Chi Minh City, Dong Nai, Binh Duong

Phat Dat delivers to the bus stations you request after you agree to buy the goods.

Phat Dat delivers to your company office in Ho Chi Minh City, you can check the goods, then pay to Phat Dat staff

If you are in other provinces and cities nationwide, Phat Dat will deliver the goods using COD service, EMS postal staff will deliver the goods to your province or city, you will receive the goods, check the goods and then pay to the postal staff. You should record a video when opening the goods to check the goods, if there is a problem with the Glass, you should immediately notify the delivery staff.

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