Frequently Asked Questions (FAQ)

Q1: Is this an external or internal gear pump? What are the advantages?

A:​ This is an internal gear pump​ (PGF series). Compared to external gear pumps, it offers lower noise levels, lower flow pulsation, and better suction characteristics. It is specifically designed for quiet operation in industrial machinery and mobile applications.

Q2: What does the "RA01VP1" suffix indicate?

A:​ This code defines the mechanical configuration:

• R: Right-hand rotation.

• A: Standard shaft (cylindrical with key).

• 01: BSPP (G) threaded ports​ (G 3/8").

• V: FKM (Viton) seals.

• P1: Specific mounting flange configuration (2-hole, centering Ø45.24 mm).

Q3: What is the key difference between this gear pump and the PV7 vane pumps?

A:​ The primary differences are displacement type and pressure capability:

• PGF1 (This model): Fixed displacement. Output flow is directly proportional to speed. It is simpler, more compact, and handles higher intermittent pressure (250 bar).

• PV7 (Previous models): Variable displacement. Flow automatically reduces at set pressure. It is more complex, larger, but offers energy savings in pressure-holding applications.

  Choose the PGF1 for constant flow needs; choose the PV7 for pressure-compensated systems.

Q4: What are the critical installation requirements for this pump?

A:​

• Suction Conditions: Although it has good suction characteristics, the inlet pressure must be between 0.8 bar (abs) and 2 bar​ to prevent cavitation and bearing damage.

• Shaft Load: The shaft is not designed for radial or axial loads. Use a flexible coupling and ensure perfect alignment with the motor.

• Port Warning: This model has BSPP (G) parallel threads, not NPT. Ensure your fittings match this type to avoid leaks.

Q5: Can this pump be used with water-glycol (HFC) or phosphate ester (HFD) fluids?

A:​ Not recommended.​ This variant is equipped with FKM (Viton) seals, which are excellent for mineral oil (HLP) and synthetic esters (HEES/HEPR). However, FKM is incompatible with water-glycol (HFC)​ and may not be suitable for all phosphate esters (HFD). Always verify fluid compatibility with the seal material before use.