Protect pumping systems and instrumentation, and enhance all around system performance with our complete line of SENTINEL Diaphragm Seals and Valves.
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Diaphragm Seals
Diaphragm seals, also referred to as gauge guards, isolate all forms of system instrumentation from hazardous and corrosive process fluids… unconditionally guaranteed!
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Back Pressure Valves
Back pressure valves enhance the performance of pumping systems by applying a continuous back pressure to the system pump, while also acting as an anti-syphon valve.
![](https://bsimechanical.com/wp-content/uploads/2021/01/Blacoh_Sentinel_BackPressureValve.png)
Pressure Relief Valves
Pressure relief valves protect pumping systems from over pressure damage caused by defective equipment or a blockage in the pump system line.
![](https://bsimechanical.com/wp-content/uploads/2021/01/Blacoh_Sentinel_PressureReliefValve.png)
Calibration Columns
Calibration Columns or Cylinders give accurate calibration of chemical metering pumps and enhance feed systems by verifying the flow rate.
![](https://bsimechanical.com/wp-content/uploads/2021/01/Blacoh_Sentinel_CalibrationColumn.png)
Injection Quills
Injection quills are used to provide safe delivery of chemicals into pipelines. The quill end ensures the dispersion of the chemicals away from the pipe wall.
![](https://bsimechanical.com/wp-content/uploads/2021/01/Blacoh_Sentinel_InjectionQuill_Transparent.png)
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