Model KB Circular Weld-In Sight Window
Model KB Circular Weld-In Sight Window
Weld-On Sight Glass for Vessels, Piping & Tank Walls
The Model KB Circular Weld-In Sight Window is designed for permanent welding onto ASME Code and non-code pressure vessels, piping, or tank walls. Available in six standard sizes from 3" to 9" view diameter, the KB series handles full vacuum through 150 psig (standard) with higher pressure ratings available on request. Materials of construction conform to ASME Boiler & Pressure Vessel Code. Temperature rating is governed by gasket and lens material selection. Custom designs are available for higher pressure ratings, special sizes, and cylindrical or spherically radiused weld pads.
Specifications
- Style:
- Circular Weld-In (Weld-On)
- View Diameters:
- 3", 4", 5", 6", 7", 9" (standard)
- Pressure Rating:
- Full vacuum to 150 psig standard; higher on request
- Temperature:
- Limited by gasket and lens material selection
- Standards:
- ASME Boiler & Pressure Vessel Code materials
- Applications:
- Pressure vessels, piping, tank walls — vacuum and pressure service
- Custom Options:
- Higher pressure, special sizes, radiused weld pads
Standard Dimensions & Pressure Ratings
| Model No. | OD (in) | ID (in) | BC (in) | N (Bolts) | D (Bolt) | T (in) | Max. Pressure |
|---|---|---|---|---|---|---|---|
| KB50 — 3" view | 7.00 | 3.25 | 5.5 | 4 | 5/8 | 1.18 | 150 psig |
| KB80 — 4" view | 7.50 | 4.00 | 6.0 | 4 | 5/8 | 1.18 | 150 psig |
| KB100 — 5" view | 9.00 | 5.00 | 7.5 | 8 | 5/8 | 1.18 | 150 psig |
| KB125 — 6" view | 10.00 | 6.00 | 8.5 | 8 | 3/4 | 1.43 | 150 psig |
| KB150 — 7" view | 11.00 | 6.87 | 9.5 | 8 | 3/4 | 1.43 | 125 psig |
| KB200 — 9" view | 13.50 | 8.81 | 11.75 | 8 | 3/4 | 1.43 | 125 psig |
All dimensions in inches. Higher pressure ratings available upon request. Custom designs available for special sizes and cylindrical or spherically radiused weld pads.
Options & Accessories
- Lighting units for hazardous locations (Class I, Div. 1 & 2)
- Lighting units for non-hazardous locations
- Low-pressure wipers
- High-pressure wipers
- Spray wash systems
- Custom pressure ratings above 150 psig
- Cylindrical or spherically radiused weld pads
- Special sizes and materials on request
Request a Quote
Get pricing and availability for Model KB Circular Weld-In Sight Window.
Contact Us
Northeast Controls Inc.
PO Box 9, Nassau, DE 19969 USA
8:30am – 4:30pm EST | Mon – Fri
