SOG 250 Sight Glass
Threaded or Socket Weld
About SOG 250
A stainless steel sight glass window with transparent tempered glass, available with NPT, BSP or socket-weld connections.
- Sizes
- ½–2 inches
- Pressure limit
- Up to 16 bar at 25°C water, depending on the requested size.
- Temperature limit
- Up to 200°C
- Body / wetted parts
- SS304 or SS316; other materials on request.


Construction and material options
- Body and wetted parts
- SS304, SS316 or other materials on request.
- Sight glass
- Transparent tempered glass.
- Bolts
- SS304; other materials on request.
- Gasket
- Non-asbestos; other materials on request.
Engineering dimensions

| Size | A | B | C | D | t |
|---|---|---|---|---|---|
| ½″ | 50.8 | 19.0 | 53.0 | 14.0 | 8.0 |
| ¾″ | 50.8 | 19.0 | 53.0 | 19.0 | 8.0 |
| 1″ | 70.0 | 38.0 | 63.0 | 24.3 | 8.0 |
| 1¼″ | 70.0 | 38.0 | 63.0 | 35.0 | 8.0 |
| 1½″ | 70.0 | 38.0 | 63.0 | 38.0 | 8.0 |
| 2″ | 70.0 | 38.0 | 63.0 | 38.0 | 8.0 |

| Size | A | B | C | D | E | t |
|---|---|---|---|---|---|---|
| ½″ | 19.0 | 48.0 | 25.5 | 9.5 | 50.8 | 8.0 |
| ¾″ | 19.0 | 49.0 | 28.0 | 11.0 | 50.8 | 8.0 |
| 1″ | 38.0 | 50.8 | 35.0 | 11.0 | 70.0 | 8.0 |
| 1¼″ | 38.0 | 52.0 | 43.0 | 14.0 | 70.0 | 8.0 |
| 1½″ | 38.0 | 54.0 | 50.0 | 16.0 | 70.0 | 8.0 |
The ordering table includes 2 inches, but the socket-weld dimension table ends at 1½ inches. Confirm dimensions for a 2-inch socket-weld enquiry.
Approvals and operating limits
The original datasheet displays an EAC approval mark.
Pressure limit: up to 16 bar at 25°C water, depending on size. Temperature limit: up to 200°C. Confirm the pressure and temperature combination for your application.
The datasheet labels pressure as “Bar(Kg/cm²)”; these units are not identical. Confirm the required pressure rating with Sightflow.
Configure your SOG 250
Select the ordering options and add your application details. Fields marked * are required.
