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·Wide Material for selection 

·Ease of maintenance.

·Availability in high pressure

·Availability inhigh and low  temperature  

.Explosion-proof and Anti-corrosive structure 

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    BCST your Expert Sight Glass Supplier in China

    BCST sight glass is a tool set up right into a pipe to offer a visible view verifying liquid flow for route and accuracy of flow rate. BCST sight glass signs permit visible observation of the direction and rate of liquid flow, powder, via one or greater commentary windows. It is a frame with one or greater gaskets and a manner to mount the indicator to the pipeline, including flanged, threaded, or sanitary clamp connections.

    BCST your One-Stop Sight Glass Solution in China

    BCST sight glass  may be used internally inner of gadget or generators to screen gasoline strains or hydraulic fluid float and quality. It is likewise utilized in some of municipal wastewater and environmental applications. These industries use sight glass in a few components in their operations, medical, HVAC, marine, pharmaceutical, chemical, industrial, aerospace, agricultural, protection and military, environmental, and meals and beverage.

    Give us a message at [email protected] to help you select the right sight glass on your application.

    Double window sight glass

    Double Window Sight Glass

    Paddle Wheel Sight Glass

    Sanitary Sight Glass

    Thread Sight glass

    Thread Sight Glass

    Tubular Sight Glass

    Wheel Sight Glass

    BCST your BEST Supplier for Sight Glass

    BCST is one amongst the leading reliable and stable sight glass  manufacturers in China. If you’re searching for an experienced manufacturer for your next project, with strong technical background, professional team, and budget-friendly products, BCST is your most suitable choice.

    BCST can provide different products supported customers’ requests. From packaging to delivery, you’ll receive BCST’s most detailed service. BCST’s technical team will provide you with professional guidance during usage or installation. With ATEX, ISO, SIL2, RoHS, and CNEX, BCST will provide you high-quality sight glass at a competitive price.

    Drop us an email for your inquiry now!

    BCST Sight Glass Quality Control

    • Technical software caculation
    • Technical team meeting
    • CAD drawing confirmation  

    Assembly

    • Installation
    • Calibration
    • Chemical Analysis
    • Mechanical Propery
    • dimension Checks
    • Visual Checks
    • Non-destruction Examination

    Hydrostatic Test

    • Shell test
    • Sealing test
    • Leakage test
    • Air test
    • Function test
    • CNC machining
    • Visual checks
    • Dimensional checks
    • Liquid penetration test

    Outlook Treatment

    • Surface Polish
    • Painting
    • Visual inspection
    • Thickness checks
    • Visual checks
    • Liquid penetration
    • Test
    • Hardness test
    • Lapping
    • Dimensional checks

    Packing

    • Marking
    • Exported wooden box

    Get the Latest Catalogue Now!

    Why Purchase Sight Glass From BCST

    Sight Glass -FAQ

    What is Pipe Sight Glass?

    The pipe sight glass is one of the main accessories for industrial piping installations. It enables us to observe the reaction of the flow of liquids, gases, steam, and other media in the pipeline at any time and to monitor production. In addition, it allows us to avoid accidents in the production process. Pipeline sight glasses are often used in petroleum, chemical, chemical fiber, pharmaceutical, and other production pipelines.

    pipe sight glass

    How are industrial pipe sight glasses classified?

    Industrial pipeline sight glass is used to observe the reaction of the medium in industrial production. You can apply it to equipment in a variety of industries. There are no types of materials and glass used for industrial sight glasses. You can select it according to the pressure and temperature range of the medium reaction and the acidity and corrosiveness of the medium. The sight glass can be divided into different types according to the other uses in the industry.

    Specific classification is as follows.

    1.Boiler sight glass, pressure vessel sight glass. These sight glasses are mainly used for various types of observation holes. Their specifications are relatively small. It is used mainly in different chemicals, pressure vessels, electric power, medicine, boilers, etc., as a viewing window.

    2.Petroleum, chemical pipeline sight glass. It is mainly used for acid and alkali concentration, and the temperature change is relatively large. Such occasions require glass with good resistance to pressure and heat impact. In addition, it is also suitable for high-pressure vessels, petroleum, chemical, nuclear power plants, and other places with high requirements for sight glass.

    3.Liquid level meter glass sight glass. It is mainly used for various liquid levels or oil level inspections. It mainly contains flat light type, trough type level meter glass, trigonal glass, two-color water level meter glass, and so on. Its working temperature is 200℃-1200℃. The temperature depends on the material. Its working pressure resistance is 1-30Mpa. The pressure depends on the material, thickness, and specification.

    What is the equipment sight glass?

    Equipment sight glass is commonly known as a flange sight glass. It is also known as a pair of flange sight glasses because it is two pieces of the flange to clamp. Equipment sight glass below is divided into plate sight glass, neck sight glass, live joint sight glass, frame sight glass, etc.

    Use

    The sight glass equipment is suitable for chemical, petroleum, cosmetic, pharmaceutical, and other industrial installations. It can observe the operation of materials inside the equipment and prevent accidents from happening.

    Technical parameters

    1.Flange material: carbon steel, stainless steel, 304, 316, 316L, etc.

    2.Window material: tempered glass, borosilicate glass, quartz glass.

    3.Seal material: nitrile rubber, silicone, PTFE, graphite composite.

    4.Working pressure (Mpa): PN0.6~2.5.

    5.Working temperature: 0℃~+250℃; 0℃~+800℃.

    equipment sight glass

    What is a Straight sight glass?

    Straight through sight glass is also known as liquid flow viewer, liquid flow sight glass, pipe sight glass, or straight through the cross-type sight glass. It is a critical accessory widely used in pipelines and equipment installations. It can be used in high temperature, corrosive, easy to poison, dangerous, and easy to crystallize chemical towers to ensure its safe production. It can be connected by flange, thread, and welding. The straight-through sight glass mainly consists of a sight glass base plate, sight glass, fasteners, seal assembly, etc. It is mainly made of stainless steel, carbon steel, plastic, and copper.

    straight sight glass

    Technical Parameters

    1. Housing material: carbon steel, stainless steel, glass steel, carbon steel lined with fluorine, FRPP plastic.
    2. Window materials: Lime glass, toughened borosilicate glass, silica glass, plexiglass.
    3. Seal material: nitrile rubber, PTFE, graphite composite.
    4. Working pressure (Mpa): PN0.6~2.5. We can customize customers with higher pressure requirements.
    5. Working temperature: 0℃~+250℃; 0℃~+800℃.
    6. Flange standard: JB/T81-94, other flange standards please user specify: such as HG, ANSI, ASME, HGJ, DIN, JIS, etc.
    7. Manufacturing and testing standards: HGJ501-502-86
    8. Valve body appearance: carbon steel anti-corrosion paint or blackened stainless steel pickling treatment or polishing

    Selection of seals

    The choice of the connection between the straight sight glass and the pipeline or equipment will affect the chance of the pipeline and the straight sight glass producing the phenomenon of running, bubbling, dripping, and leaking.

    The flange sealing surface style of the straight-through sight glass requires consideration of the pressure, temperature, medium, and many other pipeline conditions. Thus, according to this selection of a cost-effective most ideal style.

    The sealing style mainly has RF, MFM, TG, and FF.

    What is A Impeller sight glass?

    The impeller sight glass belongs to the sight glass category and is a necessary accessory to observe media flow in the pipeline. It is widely used in cooling systems, thin oil lubrication systems, fuel supply systems, chemical, chemical fiber, pharmaceutical, food, power stations, pump equipment, and other industrial production equipment. It can observe the flow reaction of liquid, gas, steam, and other media at any time. Its main connection methods are threaded, welded, and flange types.

    Impeller Sight Glass

    The working principle of impeller sight glass is to visually judge whether the medium is flowing or flowing fast or slow through the window glass translucent premise of the impeller or moving or static to achieve the regular operation of pipelines and equipment.

    The impeller sight glass comprises six components: valve body, glass sight glass, impeller, fastening cap, sealing ring, and rotor shaft.

    Valve body: carbon steel or stainless steel casting, valve cavity inlet, and outlet have eccentric and central types.

    Glass: chalcogenide glass; toughened glass; borosilicate glass; quartz glass

    Impeller: PTFE; nylon; metal

    Rotor shaft: stainless steel

    Fastening cap: threaded cap; flange plate

    Seals: Buna-N gaskets; PTFE gaskets; graphite metal gaskets

    Technical Parameters

    Material

    Stainless steel / carbon steel / copper

    Connection

    method

    Threaded /

    Welded

    Type

    Impeller type flow sight glass (liquid flow viewer)

    Measurement

    range

    0.1-40(m3/h)

    Accuracy

    1

    Nominal

    diameter

    DN6-DN80(mm)

    Suitable media

    Water, oil, gases and acids, alkaline liquids or toxic gases

    Working

    pressure

    0.6/1.0/1.6/2.5/4.0(MPa)

    Operating

    temperature

    0-195(℃)

     

     

     

    Material

    Stainless steel / carbon steel / copper

    Connection

    method

    Flange

    Type

    Impeller type flow sight glass (liquid flow viewer)

    Measurement

    range

    0.25-90(m3/h)

    Accuracy

    1

    Nominal

    diameter

    DN6-DN300(mm)

    Suitable

    media

    Water, oil, gases and acids, alkaline liquids or toxic gases

    Working

    pressure

    0.6/1.0/1.6/2.5/4.0(MPa)

    Operating

    temperature

    0-195(℃)

     

     

    What is a float sight glass?

    Float Sight Glass

    Working principle

    The float sight glass consists of a glass sight glass, an observation pipe, and an inlet and outlet pipe. The observation pipe is welded to the inlet and outlet pipe. Inside the observation pipe, there is an afloat and a screen. The function of the screen is to prevent the float from flowing out of the observation pipe with the medium. It is because the density of the float is lower than the density of the liquid being transferred through the line. Therefore, the float floats above the medium when the medium is flowing in the pipe. And it will wobble with the intensity of the medium flow. In this way, we can visually observe the flow of the medium in the line.

    Technical Parameters

    Body material: carbon steel and stainless steel

    Window material: toughened borosilicate glass (pressure resistance 2.5MPa, temperature resistance ≤250℃)

    Quartz glass (pressure resistance 10MPa, temperature resistance ≤ 800 ℃) and aluminosilicate glass (6.4MPa-25MPa, temperature resistance ≤ 400 ℃ can not be resistant to high temperature and acid and alkali media)

    Seal material: nitrile rubber, polytetrafluoroethylene

    Type

    Float

    Measurement range

    0.2-175(m3/h)

    Accuracy

    1

    Nominal diameter

    DN6-DN300(mm)

    Suitable

    media

    Water, oil, gases and acids, alkaline liquids or toxic gases

    Working pressure

    0.6/1.0/1.6/2.5/4.0(MPa)

    Operating

    temperature

    -10~195(℃)

    Connection Method

    Threaded; flanged;

    welded

    What is a lined sight glass?

    Steel fluorine lined through sight glass is also a lined sight glass. It is widely used in petroleum, chemical, pesticide, acid, and alkali industries. It is the ideal style of sight glass for anti-corrosion pipelines.

    The national standard for steel fluorine lined through sight glass is HG/T21622-1990.

    Steel fluorine lined through sight glass is used to observe the flow and color change of the unit fluid in the pipeline or equipment. It can directly monitor the chemical process.

    Steel fluorine lined through sight glass body is made of carbon steel and lined with fluorine plastic (F46). The lens is made of high-quality tempered glass. It has corrosion resistance and mechanical strength and has the characteristics of beautiful appearance, high strength, and durability.

    The main technical parameters of the steel fluorine lined through sight glass are as follows:

    Primary body material: carbon steel, stainless steel.

    Lining material: fluorine plastic (F46)

    Window glass: toughened glass, toughened borosilicate glass

    Operating temperature: 0℃~150℃

    Operating pressure: 0-1.0MPA

    Connection: flange connection standards can be used GB, HG, SH, JB, ANSL, JIS, etc.

    What are the areas of application of the sight glass? 

    1. The sight glass is suitable for observing weakly corrosive materials in chemical and petrochemical production, such as water, ammonia, oil, hydrocarbons, etc.

    2. It is suitable for observing the strong corrosive materials in chemical production. Such as caustic soda, concentrated dilute sulfuric acid, carbonic acid, acetic acid, ester acid, etc.

     3. It is also suitable for observing low-temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen, and various refrigerants.

    4. There is also light industry and food and pharmaceutical production of materials with hygiene requirements, such as beer, beverage, dairy products, grain pulp, medical supplies, etc.

    How to maintain and care for your sight glass?

    1.Sight glass is used to observe the flowing reaction equipment of liquid, gas, steam, and other media. Therefore, its window glass should be kept clean and dust-free.

    2.The temperature and pressure resistance of the glass has certain limitations. Please strictly implement the provisions of the manual.

    3.The permissible rapid change temperature is <60°C. The glass will break if the temperature difference is too great.

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