Squeezer_DualAirtm
Measures Both Entrained Air and Dissolved Air!
Features
· Determine the contribution of dissolved air in low-pressure operations
· Quickly survey process operations for operating issues
· Timely measurement of product quality: pin holes, streaks, poor adhesion...
· Improved environmental compliance
· Very small and portable…fits in a standard briefcase
· Inexpensive
Industries
· Military: Critical hydraulic systems such as space launch vehicles
· Pulp and Paper: Lightweight sheet drainage, formation, pinholes...
· Food: Shelf-life issues, sanitary assurance, canning operations….
· Hydraulic oil, lubricants
· Pharmaceuticals
· Cutting tool coolants
· Any application where troubleshooting of air content is required
Specifications
Wetted Materials: Polycarbonate and Buna rubber
Entrained Air Range: 0.1 to 45% v/v%
Minimum Dissolved Air (v/v % referenced at atmospheric pressure): 0.2%.
Accuracy: +/-5% of measurement
Weight: 1.2 lbs (550 g)
Temperature Limits: 0 F to 190 F (-17 C to 88 C)
How it Measures Entrained Air
Here's how the DualAir_S_V1 measures entrained air:
The darker lines marked with arrows illustrate the flow of process fluid either into the DualAir_S_V1, or bypassing the tester, depending upon the arrangement of the valves. The bypass valve is provided by the customer.
At the starting condition, the Fill and Bleed Valves are opened and the Bypass Valve and PIT Fill Valves are closed. The Compression Piston is moved completely out of the Sample Tube and then returned approximately 1 revolution into the tube to eliminate thread play.
After the Sample Tube is filled with fresh process fluid, then the Bypass Valve is opened, the Fill Valve is closed, and the Bleed Valve is closed.
The PIT Valve is opened and the Compression piston is moved into the Sample Cylinder until process fluid rises in the Pressure Indicator Tube to the Lower Reference. The PIT Valve is then closed and the Compression Piston is moved into the Sample Cylinder, causing process sample to move further into the PIT Tube. This action places a known positive pressure on the Threaded Compression Shaft needed to move the air bubble from the Lower Reference to the Upper Reference is multiplied by a conversion factor to calculate the entrained air content.
How it Measures Dissolved Air
Here is how the DualAir_S_V1 measures dissolved air:
The darker lines marked with arrows illustrate the flow of process fluid either into the DualAir_S_V1, or bypassing the tester, depending upon the arrangement of the valves. The bypass valve is provided by the customer.
At the starting condition, the Fill and Bleed Valves are opened and the Bypass Valve and PIT Fill Valves are closed. The Compression Piston is moved almost fully into the Sample Tube.
When the Sample Tube is filled with fresh process fluid, the Bypass Valve is opened, the Fill Valve is closed, and the Bleed Valve is closed.
The PIT Fill Valve is then opened. The Compression Piston is moved fully into the Sample Cylinder, causing process sample to fill and overflow the PIT tube. The Compression Piston is then moved slowly out of the cylinder until the liquid level in the PIT Tube reaches the Upper Reference line. The PIT Fill Valve is then closed. The Compression Piston is further removed from the cylinder until the liquid level in the PIT Tube reaches the Lower Reference Line. This action places a known negative pressure on the trapped sample.
The number of turns of the Threaded Compression Shaft needed to move the liquid level to the Lower Reference Line is used to calculate the dissolved air. If the process fluid also contains entrained air, then the entrained air value previously determined is also used in the calculation of dissolved air.
