design do great reduce of the high-pressure impact from the vane to the rotor; which do assistant the vane pump to be more stable performance, longer life and lower noise under high-pressure and high-speed circumstance.
Application as following:

A.V and VQ Intra-Vane Pump for Industry Application 1.V Series Single Pump: 20V, 25V, 35V, 45V
2.V Series Double Pump: 2520V, 2525V, 3520V, 3525V, 4520V, 4525V, 4535V
3.V10/V20 Series Vane Pump: V10, V20
  B. V and VQ Intra-Vane Pump for Automobile Equipment 1.VQ Series Single Pump: 20VQ, 25VQ ,30VQ, 35VQ, 45VQ
2.VQ Series Double Pump: 2520VQ, 3020VQ, 3520VQ, 3525VQ, 3530VQ, 4520VQ, 4525VQ, 4530VQ, 4535VQ
  C. Lower Noise V and VQ Intra-Vane Pump 1.SQPV Series Single Pump: SQPV1, SQPV2, SQPV3, SQPV4
2.SQPV Series Double Pump: SQPV21, SQPV31, SQPV32, SQPV41, SQPV42, SQPV43