Your Leading Oil Sight Glass Supplier
Taizhou Chengsheng Machinery Co., Ltd. is a manufacturer specialized in the development and production of fluid equipment components for general industrial applications. Our main products include hose swivel, shut off valve, check valve, oil sight glass, and pipe fitting, which are widely used in oil and gas storage and transportation, industrial pipelines, water pump systems, and hazardous chemical transportation. We support both standardized bulk supply and customized solutions to meet different system requirements.
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![Four-window Sight Glass]()
Four-window Sight GlassFor operators who need to monitor fluid flow, color, clarity, and bubble formation inside pipelines from multiple angles, the Four-window sight glass provides the ultimate visual access. Unlike -
![Four Window Oil Sight]()
Four Window Oil SightThread type: G/BSPT/NPT. Material: Copper. Seal material: Nitrile Rubber/Fluororubber. -
![Two Window Oil Sight]()
Two Window Oil SightThread specification: 1”, 3/4” (variable diameter). Thread type: G/BSPT/NPT. Material: Copper. Seal material: Nitrile Rubber/Fluororubber -
![Low Hanging Oil Sight]()
Low Hanging Oil SightExternal thread specification: M33X1.5 M35X1.5. Thread type: G/BSPT/NPT. Material: Iron. Seal material: Nitrile rubber / Fluororubber -
![Glass Oil Level Indicator]()
Glass Oil Level IndicatorExternal Thread Specification: M33X1.5, M35X1.5. Thread Type: G/BSPT/NPT. Material: Iron. Sealing Material: Nitrile Rubber / Fluororubber -
![Aluminum Four Window Oil Sight]()
Aluminum Four Window Oil SightThread specification: 1, 3/4 (variable diameter). Thread type: G/BSPT/NPT. Material: Aluminum. Seal material: Nitrile Rubber
Types of Oil Sight Glass
Four Window Oil Sight
The Four window oil sight is a device used to observe whether the oil in the fuel dispenser pipeline reaches the oil gun through the rubber hose. The oil sight can rotate 360 degrees: it prevents the rubber hose from winding and knotting, reduces the wear of the rubber hose, and improves its service life.
Two Window Oil Sight
The Two window oil sight is a device used to observe whether the oil in the fuel dispenser pipeline reaches the oil gun through the rubber hose. The oil sight can rotate 360 degrees: it prevents the rubber hose from winding and knotting, reduces the wear of the rubber hose, and improves its service life.
Aluminum Four Window Oil Sight
The Aluminum four window oil sight is a device used to observe whether the oil in the fuel dispenser pipeline reaches the oil gun through the rubber hose. It can rotate 360 degrees: preventing the rubber hose from winding and knotting, reducing the wear of the rubber hose, and improving its service life.
Specifications of Oil Sight Glass
|
Type |
Window / Indicator / Level Gauge |
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Body Material |
Steel / Stainless Steel (304 / 316) / Brass |
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Viewing Window Material |
Tempered Glass / Borosilicate Glass |
|
Connection Type |
Weld / Thread / Flange |
|
Nominal Size Range |
1/2″ – 4″ |
|
Pressure Rating |
PN10 / PN16 / ANSI Class 150 |
|
Operating Temperature |
-20°C to +150°C |
|
Seal Material |
NBR / Viton (FKM) |
|
Visible Window Diameter |
Standard sizes up to 100 mm |
|
Fluid Compatibility |
Oil / Hydraulic Fluid / Lubricant |
|
Function |
Visual oil level & condition indication |
|
Design Standard |
ISO / ASME / DIN compliant |
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Test Standard |
Pressure Test per industry norms |
|
Installation Orientation |
Horizontal / Vertical |
Customization Options
Window Size: Customizable
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Connection Type: Multiple Options
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Material Grade: Customizable
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Pressure Rating: Customizable
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MOQ: Customizable
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Functions of Oil Sight Glass
A sight glass is a transparent device that allows operators to visually monitor the liquid level within a tank, pipe, or reservoir. Specifically, oil sight glasses make it possible to track both the quantity and quality of lubricants in real time. Key things an oil sight glass can show you:
1. Oil levels – Ensuring machinery is running with sufficient lubrication.
2. Oil condition – Including colour, clarity, and contamination.
3. Water accumulation – Helping detect moisture ingress before it causes damage.
This quick, non-invasive monitoring tool is a vital safety feature that prevents unnecessary exposure to hazardous substances.
Maintenance of Oil Sight Glass
|
Safety Step |
Action Required |
Why It's Critical |
|
Shutdown |
Follow the machine's specific shutdown procedure. |
Prevents unexpected movement or startup of mechanical parts. |
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De-energize & LOTO |
Turn off the main electrical breaker/disconnect and apply your personal lock and tag. |
Guarantees the machine cannot be powered on while you are working on it. |
|
Isolate Fluid |
Close all supply and return valves for the oil system. |
Stops oil from flowing into the work area once you open the system. |
|
Depressurize & Drain |
Open a vent or drain to release all system pressure and lower the oil level. |
Prevents a high-pressure spray of hot oil when you remove the old sight glass. |
Installation Precautions of Oil Sight Glass
Installing a modern oil sight glass should be a relatively simple process revolving around hand-threading the sight glass and tightening with a crescent wrench. If you don't properly install the sight glass, however, your oil readings will be wrong, and depending on whether your machinery is pressurized, the wrong sight glass could spell trouble. So, what do you need to know before installing your oil sight glass?
● Determine whether you're installing a variation of a bullseye or columnar sight glass. The installation location depends on the sight glass type. Bullseye sight glasses are installed in a port right at the oil level. Columnar and BS&W bowls are installed in the drain port.
● If you're using a length of piping to connect the sight glass to the headspace, make sure there are no "goosenecks" or traps in the piping that would prevent oil from moving freely.
● Note and match the recommended temperature ranges and maximum operating pressure requirements with a sight glass that can satisfy those requirements.
T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.
Packing & Transportation
FAQ
As one of the most professional oil sight glass manufacturers in China, we're featured by quality products and low price. Please rest assured to wholesale bulk customized oil sight glass made in China here from our factory. If you have any enquiry about pricelist and free sample, please feel free to email us.
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