Figure 20From: Modelling and Dynamic Characteristics for a Non-metal Pressurized Reservoir with Variable VolumePrinciple of VVPR dynamic test. 1. Filter; 2. Shut-off valves; 3. Union tee; 4. Direction valve; 5. Unloading relief valve; 6. Hydraulic pump; 7. Electrical motor; 8. Pressure sensors; 9. One-way valve; 10. Displacement sensors; 11. Proportional reverse valve; 12. VVPR; 13 Hydraulic cylinderBack to article page