Bull’s Eye Sight Glass
Threaded, flange and socket-weld connections
About Bull’s Eye
The Bulls Eye is designed to satisfy the need for a threaded connection. The Bulls Eye unit is available for 1/8" to 2" MNPT pipe thread connections, and can be manufactured to meet your pressure and temperature requirements. Different materials of construction are available to meet your process needs. This unit can be utilized with other types of connections including NPT plug, weld, socket-weld, flange, sanitary, or as specified.
Construction and material options
- 1Body
- 316 Stainless Steel; Carbon Steel; Hastelloy; Alloy 20; Titanium; Aluminum
- 2Retainer cap
- 316 Stainless Steel; Carbon Steel
- 3Lens
- Two-Piece Laminated Tempered Soda Lime (Standard); Tempered Borosilicate; Annealed Borosilicate; Quartz; Lexan; Acrylic
- 4Lens cushion gaskets
- Teflon®; Grafoil®; Gylon®; Blue-Gard®
- 5O-rings or packing
- Teflon®; Viton®; Silicone; Buna-N; Die-Formed Graphite
Mica shields, other materials and alternative connections may be requested in Application details. MNPT product range: 1/8–2 in; the dimension table covers 1/2–2 in. Use a custom request for other sizes.
Engineering dimensions — inches
NPT
| NPT | A | B | C | D |
|---|---|---|---|---|
| 1/2 | 2 | 3/4 | 2 3/32 | 0.546 |
| 3/4 | 2 | 3/4 | 2 3/32 | 0.742 |
| 1 | 2 3/4 | 1 1/2 | 2 15/32 | 0.957 |
| 1 1/4 | 2 3/4 | 1 1/2 | 2 15/32 | 1.380 |
| 1 1/2 | 2 3/4 | 1 1/2 | 2 15/32 | 1.500 |
| 2 | 2 3/4 | 1 1/2 | 2 15/32 | 1.500 |
Other threaded connections available on request.
Flange
| Size | A | B | R.F. |
|---|---|---|---|
| 1/2 | 3/4 | 1 3/8 | 1 3/8 |
| 3/4 | 3/4 | 1 3/8 | 1 11/16 |
| 1 | 1 1/2 | 1 1/2 | 2 |
| 1 1/4 | 1 1/2 | 1 1/2 | 2 1/2 |
| 1 1/2 | 1 1/2 | 1 1/2 | 2 7/8 |
DIN or non-ANSI flanges available on request.
Socket-weld
| Size | A | B | C | D | E |
|---|---|---|---|---|---|
| 1/2 | 3/4 | 1 7/8 | 0.88 | 3/8 | 2 |
| 3/4 | 3/4 | 1 15/16 | 1.09 | 7/16 | 2 |
| 1 | 1 1/2 | 2 | 1.36 | 1/2 | 2 3/4 |
| 1 1/4 | 1 1/2 | 2 1/16 | 1.70 | 9/16 | 2 3/4 |
| 1 1/2 | 1 1/2 | 2 1/8 | 1.95 | 5/8 | 2 3/4 |
Other weld-in designs or female NPT connections available on request.
Approvals and documentation
The original product documentation states:
This sight glass has been certified as maintaining a Quality Assurance System in accordance with the Pressure Equipment Directive 97/23/EC (PED) Annex I, Paragraph 4.3 by the Certification Body 0036 of the TÜV Industrie Service GmbH.
Configure your Bull’s Eye
Select an available size or describe a custom requirement. Material choices can be left for Sightflow to advise.