
Guide to Representative Sampling
Learn the many benefits of representative sampling and get answers to your representative sampling questions
To meet DOT operator qualifications to comply with safety standards, product operators must monitor corrosion to enable real-time decision-making around their pipelines.
Sentry Saf-T-Vise quills monitor corrosion at oil & gas and chemical plants, providing an intuitive user experience and the ability to customize their configuration.
In addition, the Saf-T-Vise quills contain a patented safety feature to increase operator safety: an easy-to-use collet that locks the shaft within the process stream in both low and extremely high-pressure conditions. This feature improves operator safety by shielding them from high-energy events from different pressures during plant operation.
The quills are versatile and can operate in both directions to inject chemicals into or take a sample from within a high-pressure pipeline.
To operate the Sentry injection & sample quill as a sampler, you can install a sampling valve on the fluid inlet. This procedure enables the collection of gas or liquid samples from any desired depth without breaking into and interrupting the product stream flow.
To avoid corrosion and equipment damage and enable accurate monitoring, Saf-T-Vise comes with a materials certification and test summary to confirm the product’s materials. These documents improve material traceability to meet the requirements.
The Sentry Saf-T-Vise quills can mount in any orientation at various extension lengths up to 20 feet to reach locations that are difficult to access.
In addition, the components are tested at safety pressure 1.5x the operating pressure. This validation feature assures compliance with PHMSA regulations and NACE standards, assuring safety while avoiding substantial financial penalties.
Finally, Sentry’s 30 years of experience comes with the Saf-T-Vise brand. This expertise ensures the product you select will work for your needs, and our experts also advise your team on a suitable installation location.
Model |
insertion pressure (MOP) |
pressure rating (MAP) |
temperature rating (seals) |
STV-LP1-Q |
750 psi at 100°F (52 bar at 38°C) |
2000 psi at 100°F (207 bar at 38°C) |
PTFE: 450°F (232°C) |
STV-LP2-Q |
3/8 in: 750 psi at 100°F (52 bar at 38°C) |
4000 psi at 100°F (275 bar at 38°C) |
PTFE: 450°F (232°C) |
STV-HP1-Q |
5000 psi at 100°F (344 bar at 38°C) |
5000 psi at 100°F (344 bar at 38°C) |
PTFE: 450°F (232°C) |
STV-HP2-Q |
5000 psi at 100°F (344 bar at 38°C) |
5000 psi at 100°F (344 bar at 38°C) |
PTFE: 450°F (232°C) |
*Graphoil seals are available for higher temperature applications; contact factory for details
MAP: Maximum Allowable Pressure
MOP: Maximum Operating Pressure
Wetted Materials | 316/316L SS |
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Sentry’s chemical injection quills are designed to ensure that chemicals are evenly dispersed within pipelines. Sentry’s top-line equipment ensures product operators have all the information they need to make informed decisions about their pipelines. Chemical injection monitoring equipment offered through Sentry includes the Saf-T-Vise Injection & Sample Quills. This product is specifically designed for use in gas and chemical plants. These quills monitor corrosion and contain a patented collet that locks the shaft within the process stream during extreme pressure conditions. This is designed to be intuitive and easy for operators – saving time and money. The Saf-T-Vise Chemical Injection Atomizers are also offered through Sentry Equipment. This product comes with a materials certification and tests summary to confirm the product’s materials to avoid corrosion and equipment damage during monitoring. The components of this product are tested at 1.5x the operating pressure to ensure compliance with PHMSA regulations and NACE standards. If you have any questions about the products or placement that would be most effective, please get in touch with Sentry Equipment. There is a team of experienced engineers on staff to offer support.