Parker Settima GR Series Three Screw Pump | GR32 GR40 GR70 GR90 | SMT 16B / LN.B

LIC Hydraulic offers the Settima (a Parker company) GR Series, a world-class three-screw pump designed for industrial lubrication and hydraulic applications. Spanning sizes from GR20 to GR90 (including the popular GR70 and SMT 660 configurations), the GR series is the industry benchmark for Low Noise (LN) operation. By utilizing three intermeshing screws, these pumps transport fluid axially with zero pulsation and minimal vibration. Whether used in high-end hydraulic lifts or mission-critical turbine lubrication, the Settima GR series ensures reliable flow and extended service life even when handling fluids with entrained air.

Technical Specifications (Bulleted List)

• Series: Settima GR (Parker GR) Three Screw Pump

• Sizes: GR20, GR25, GR32, GR40, GR45, GR55, GR60, GR70, GR80, GR90

• Core Model Codes: SMT 16B / SMT 660 Series equivalents.

• Noise Level: “LN” versions optimized for ultra-quiet operation (< $52\text{–}58\text{ dB(A)}$ depending on size).

• Max Pressure: Continuous up to $40\text{ bar}$ ($580\text{ PSI}$).

• Fluid Compatibility: Mineral oils, synthetic fluids, and lubrication oils.

Key Technical Advantages

• Pulse-Free Flow: The continuous displacement of the screw geometry eliminates the pressure spikes common in gear or piston pumps, protecting sensitive downstream sensors.

• Air-Handling Excellence: Engineered to manage fluids with high air content or foaming issues without loss of prime or excessive noise.

• Compact Integration: The GR series features a compact footprint, allowing for easy integration into manifold blocks or space-constrained power units.

• Long-Term Reliability: The screws operate without mechanical contact in the presence of oil, significantly reducing wear and maintenance intervals compared to other pump types.

Application Areas

• Hydraulic Elevators: The silent power source for passenger and freight lifts.

• Wind Energy: Lubrication and cooling for wind turbine main bearings and gearboxes.

• Machine Tools: High-flow cooling and filtration circuits for CNC centers.

• Power Generation: Oil supply for steam turbines and large generator bearings.

Expert Maintenance Tips

• Verify Alignment: For foot-mounted versions, ensure perfect alignment between the motor and pump shaft. Misalignment is the leading cause of premature bearing and seal failure in screw pumps.

• Maintain Oil Viscosity: For optimal volumetric efficiency, ensure the oil viscosity remains within the $20\text{ to }400\text{ cSt}$ range. Extreme thinning of oil due to heat will increase internal slippage.

• Suction Line Integrity: Ensure the suction line is perfectly airtight. Even a tiny air leak on the intake can lead to noise and reduced flow performance, even though the pump is “air-tolerant.”