SPI Sight Glasses
Sight glasses from Stainless Products (SPI) are engineered for hygienic processing industries and are offered in three options which allow processes to be monitored visually without exposure to the outside elements. Inline and cross type sight glasses are useful for tracking color or consistency when transferring product. Tank glasses allow for fermentation or other processes to be monitored in the midst of operation. They are often installed as a semi-permanent fixture on a variety of tanks.
All SPI sight glasses are 3-A certified and come apart for easy cleaning.
Established in 1972 as a polishing company for the food and dairy industry, Stainless Products (SPI) has evolved into a full-line manufacturer of fittings, valves, pumps, and accessories for all sanitary process industries.
Standard Features
- Tri-Clamp® end connections
- 3-A certified
- Max temp 200°F
Options
- Acrylic viewport
- MTR's
SP56
Full 360° view of process media. Well suited for vertical and horizontal mounting. When mounting in a horizontal position no mechanical force should be exerted on the glass. Viton® elastomer included.
Size (in) | A (3 in. Glass) | A (6 in. Glass) |
|---|---|---|
| 1½ | 6.50 | 9.50 |
| 2 | 6.50 | 9.50 |
| 2½ | 6.50 | 9.50 |
| 3 | 6.50 | 9.50 |
Operating pressure: Borosilicate 100 PSI / Acrylic 150 PSI. *
SP54
Cross style sight glass that provides a view inside of the production flow. Elastomer options include: Viton®, Buna, EPDM, and PTFE.
Size (in) | A (in) | B (in) |
|---|---|---|
| 1½ | 4.50 | 5.50 |
| 2 | 4.75 | 7.00 |
| 2½ | 5.25 | 7.00 |
| 3 | 5.75 | 7.50 |
| 4 | 7.25 | 9.00 |
Operating pressure: Borosilicate 150 PSI / Acrylic 150 PSI. *
SP54SW
Compact unit with easy disassembly. Commonly used in vessels. Elastomer options include: Viton®, Buna, EPDM, and PTFE.
Size (in) | A (in) |
|---|---|
| 1½ | 1.25 |
| 2 | 1.25 |
| 2½ | 1.25 |
| 3 | 1.25 |
| 4 | 1.25 |
Operating pressure: Borosilicate 150 PSI / Acrylic 150 PSI. *
* Sudden pressure spikes due to water hammer or similar events can cause failure or rupture of sight glasses. Sudden changes in temperature are known to cause failures in borosilicate materials, especially when going from hot to cold. Operating pressures were determined after testing at ambient temperatures. Increased temperatures can cause leakage or rupture below operating pressure.
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