Product overview
New aftermarket 45VQ57A 1B20 — a single balanced vane pump of the 45VQ series, fixed displacement, for open hydraulic circuits. Supplied as a new aftermarket replacement, quality checked before shipping.
Model code — 45VQ57A 1B20
The model code fixes every mechanical interface of the pump. The string is written in four groups — series with pilot, displacement, port with thread system and mounting, then shaft, outlet position, design number and rotation — and this unit reads as follows:
| Position | Value | Meaning |
|---|---|---|
| 1 Seals | — | omitted — standard seals for mineral oil |
| 2 Series | 45VQ | 45VQ balanced vane pump (single) |
| 3 Pilot | — | omitted — standard pilot |
| 4 Displacement | 57 | 57 = 190.2 cm³/r (nominal SAE flow in USgpm at 1200 r/min) |
| 5 Port | A | SAE 4-bolt flange, inlet and outlet |
| 6 Mounting / seal | — | omitted — flange mounting with single shaft seal |
| 7 Shaft | 1 | keyed shaft |
| 8 Outlet position | B | viewed from the cover end: 90° counter-clockwise from the inlet |
| 9 Design number | 20 | design level of this series |
| 10 Rotation | — | right-hand, clockwise viewed from the shaft end |
Series performance: 45VQ belongs to the VQ line, rated above the V line at the same size; confirm the exact limits against the full nameplate code.
Selection & ordering
Send us the full model code from your nameplate (or your machine model) and we will confirm this pump matches before you order.
Other models in this series
More VQ Single Vane Pumps models we stock (45VQ frame first):
Series overview
Series page: VQ Single Vane Pumps. Parent range: V / VQ Single Vane Pumps · Family: V · VQ · 50V Series.
Cartridges and kits for this pump: V / VQ Cartridge Kits — the cartridge is interchangeable within the same position in the housing, so the original housing and shaft stay on the machine.
Not sure about the fit? Contact us with the full nameplate code and we will confirm before you order.
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