In many factories, a pump failure is often treated simply as:

“Just replace it and keep more spares in stock.”

But for anyone who truly calculates total cost, a single pump failure brings much more than the price of a new unit:

• Entire production lines go down, delaying deliveries;

• Contaminated oil can spread into valves and actuators, creating long-term reliability issues;

• Customers lose confidence in the machine’s reliability, affecting future purchase decisions.

Under high-pressure, high-shock, heavy-duty conditions,
if the main pump is already operating close to its design limits,
stocking more spares only postpones the risk – it doesn’t reduce it.

That’s why many engineers, when revisiting pump selection for high-pressure systems,
prefer pumps with a “high-pressure physique”, such as the FG / FG21 internal gear pump series:

• Most models are rated at 31.5 MPa with maximum up to 35 MPa, rather than struggling around 25 MPa;

• Large-displacement FG1 / FG2 pumps are designed for high pressure + medium/large flow, not just scaled-up small pumps;

• The internal gear structure with wear-resistant materials is less sensitive to oil contamination, tolerating real-world oil conditions;

• Across the 200–3000 r/min speed range, FG pumps maintain good volumetric efficiency, reducing heat and wear caused by running in low-efficiency zones.

A more reliable selection logic is:

1. Define the true process requirements for maximum pressure and flow, instead of arbitrarily inflating them with large safety factors;

2. Choose an FG0 / FG1 / FG2 model that offers high efficiency at typical operating points plus sufficient pressure margin;

3. Shift spare-parts strategy from “many cheap pumps”
   to “a few robust FG pumps with longer life and more predictable maintenance intervals.”

From the maintenance team’s standpoint,
lower failure frequency is more valuable than “cheap spares”.

From management’s perspective,
downtime losses and customer trust often cost far more than the price difference between pumps.

The value of FG / FG21 high-pressure internal gear pumps lies in adding a reliability buffer to systems
that must survive in high-pressure, heavy-duty environments with less-than-perfect oil quality.