Oscillating Piston Principle of Operation
Liquid enters a precision-machined chamber containing an oscillating (rotating) piston.The positionof the piston divides the chamber into compartments containing an exact volume.Liquid pressure
drives the piston to oscillate and rotate its center hub.The movements of the hub are sensed
through the meter cover by a follower magnet.Each revolution of the piston hub is equivalent to a
fixed volume of fluid, which is indicated as flow by a register/totalizer.Close clearances between
the piston and the chamber ensure minimum liquid slip for highly accurate and repeatable
measurement of each volume cycle.
High Accuracy
Figure 1. Oscillating Pistonwith R-22 register
Accessories
Figure 2. Oscillating Pistonwith R-15 register
- Two-stage shut-off valves
- Rate of flow indicators
- Totalizers
- Batch controllers
Benefits
+
0.5% of rateExceptional ValueEliminates upstream and downstream straight run piping requirementsPower not required for mechanical versionReliable Design Standard 316 SS/ETFE allows user flexibility with different fluids and Construction
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(864) 574-3327 (800) 778-9251 Fax:(864) 574.8063 www.venturemeas.com/niagara niagarasales@venturemeas.com
