
Weld To Tank Sight Glass ZW30 - Oval Design
The weldable oval sight glasses are devices installed in tanks and pressure vessels to allow the visualization of the contents and the processes occurring inside the tank. The oval shape of the sight glass provides a wide viewing area allowing operators to more easily inspect the tank's contents and internal processes.
OUR WARRANTY
100% Satisfaction Guarantee
Douglass warrants merchandise against defective workmanship and materials that become apparent within a period of 12 months from the date of receipt of invoice by the purchaser (hereinafter referred to as the warranty period). All liabilities under the warranty provisions shall expire when the warranty period has expired. Please feel free to contact us if you have any questions or comments.
SHIPPING AND PACKAGING
At Douglass, we use a unique and patented packaging method that minimizes the risk of glass damage during shipping. This system ensures your products arrive in perfect condition, just as we would like to receive them ourselves.
We understand that not all glass is the same, so we tailor our packaging techniques based on the type and quantity of products you order. This ensures maximum protection for every shipment.
Weldable Oval Tank Sight Glasses The weldable oval sight glasses are devices installed in tanks and pressure vessels to allow the visualization of the contents and the processes occurring inside the tank. The oval shape of the sight glass provides a wide viewing area allowing operators to more easily inspect the tank's contents and internal processes.
Oval Tank Sight Glasses - Advantages
Ease of Installation
The ZW30 is designed for quick and simple installation, minimizing downtime and labor costs during setup. Its intuitive design ensures even complex installations can be completed efficiently.
Aesthetic Design
The screws are placed on the upper flange, giving the ZW30 a sleek and professional appearance. This makes it an ideal choice for installations where visual appeal is important.
Customizable Options
While the ZW30 comes in standard sizes, it can be customized to meet specific project needs, including adjustments in metal thickness, glass type, and gasket materials.
Cost-Effective Solution
The ZW30 offers a reliable and durable sight glass at a competitive price, making it a great option for industries aiming to balance performance and cost-efficiency.
Durable Construction
Constructed from high-quality materials like carbon steel or stainless steel, the ZW30 is resistant to corrosion and wear, ensuring long-lasting performance even in challenging environments.
Versatility
Suitable for a broad range of industrial applications, from chemical processing to food and beverage production, the ZW30 can adapt to various operating conditions and requirements.
Optional LED Lighting
For installations in low-light environments, the ZW30 can be equipped with an optional LED light, enhancing visibility and safety. The light is protected by a polycarbonate layer to prevent damage from potential explosions inside the tank.
Oval Sight Glass for Tanks - Parts and Materials

| Item | Part name | Material options |
|---|---|---|
| 1 | Nut |
|
| 2 | Washer |
|
| 3 | Stud bolt |
|
| 4 | Cover Flange |
|
| 5 | Gasket (max temp) |
|
| 6 | Sight Glass |
|
| 7 | Weld Pad |
|
Oval Tank Glass Windows -
TECHNICAL INFORMATION
| Part ID | Visible dimensions (internal) A × B | Weldable dimensions (external) C × D | Flange thickness H1 × H2 |
|---|---|---|---|
| ZW30-CO-200X2020 | 0 x 2027 | 0 x 701 | 5 x 25 |
| ZW30-CO-270X2027 | 0 x 2034 | 0 x 701 | 5 x 25 |
| ZW30-CO-340X2034 | 0 x 2041 | 0 x 701 | 5 x 25 |
| ZW30-CO-410X2041 | 0 x 2048 | 0 x 701 | 5 x 25 |
| ZW30-CO-480X2048 | 0 x 2055 | 0 x 701 | 5 x 25 |
| ZW30-CO-550X2055 | 0 x 2062 | 0 x 701 | 5 x 25 |
| ZW30-CO-620X2062 | 0 x 2069 | 0 x 701 | 5 x 25 |
| ZW30-CO-690X2069 | 0 x 2076 | 0 x 701 | 5 x 25 |
For more information about this and other products, including our Oval Tank Sight Glasses, we invite you to visit our contact page. Our team at Douglass is ready to assist you with tailored solutions for your process equipment needs.
