Description: Variable Volume Single Vane Pump - VDR22 Design Series

Stable, Highly Efficient Operation Up To 2030 psi
A biased piston that minimizes ring vibration and leak-free pressure balance construction enables highly efficient highpressure operation, and very stable performance up to 2030 psi.
High-Precision Instantaneous Response
Response has been improved by a special bias piston mechanism. Prompt response at both ON-OFF and OFF-ON ensures instantaneous, stable, high-precision operation.
Silent Operation, Even in the High Pressure Range
CQuiet journal bearings, a bias piston that allows a 3-point support system, and new suction and discharge port shapes all contribute to minimize operation noise. Silent, vibration-free operation is ensured, even in the high pressure range.
Reduced Power Loss
A combination of NACHI-original mechanical innovations and precision machining create a pump that minimizes power loss, especially at full cutoff.
Solid Construction Stands Up To Harsh Operating Conditions
The tough and rugged construction of this pump is made possible by a long history of quality pump designs. This, in combination with specially selected materials and skilled workmanship, provides outstanding durability.

NOTE: Ring Size: in the case of 2, max setting pressure is 1015 psi


Spec Value
Series VDR
Pump/Head Side Size 1
Mounting Method B: Flange Type Mount
Ring/Head Ring Size 1: 30 (7.9)
Flow Characteristics A: Constant Discharge Type
Pressure Adjustment Range 2: 217 ~ 507
Auxiliary Symbol N/A
Design Number 22
Weight (lb/kg) 1 / 19.8

Values provided may differ based on other specifications. Please consult the product documentation for values specific to the model number.
*Please consult product documentation for specific values

Additional Documents: