GR90-SMT16B-1500L B5 RF2 | Settima Screw Pump 1500L/min 40bar

Product Overview

The GR90-SMT16B-1500L B5 RF2 is a flagship model of the SETTIMA GR series three-screw pumps, belonging to the SMT16B series of standard dry-installation screw pumps. Founded in 1978 by engineer Cagnani, Settima has been dedicated to manufacturing low-noise, high-technology screw pumps.

GR series three-screw pumps are positive displacement rotary pumps that deliver media axially. The pump consists of one driving screw and two driven screws with specially profiled helical surfaces. As the screws rotate and mesh with each other, several sealed chambers are formed between the inlet and outlet, continuously transporting the media from the suction side to the discharge side. Key features include compact construction, smooth operation, extremely low noise, and pulse-free flow.

Model code GR90-SMT16B-1500L B5 RF2 breakdown:

• GR90: Product series and size code – 90 indicates the large-frame model in this series

• SMT16B: Standard Mounting Type (SMT), 16B denotes the pump body series

• 1500L: Rated flow rate of 1500 L/min (@ 1450 rpm)

• B5: IEC B5 flange mounting configuration

• RF2: Configuration version code (seal and port configuration)

This series is also available through the Parker distribution channel (Parker GR90S-SMT16B series).

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. The GR90-SMT16B-1500L B5 RF2 offers 100% direct interchangeability with original Settima/Parker pumps of the same model—no modification required. Every unit undergoes 100% simulated load testing before shipment, ensuring performance validation under real-world operating conditions.

Technical Specifications 

Model & Series Information:

• Model: GR90-SMT16B-1500L B5 RF2

• Brand Series: SETTIMA GR Series / SMT16B Series

• Pump Type: Three-screw pump

• Mounting Type: Dry installation (SMT)

Flow & Pressure Parameters:

• Rated Flow: 1500 L/min (@ 1450 rpm)

• Rated Continuous Pressure: 40 bar

• Peak Pressure: 50 bar

• Maximum Flow for Series: Up to 3400 L/min (@ 2750 rpm)

Speed & Drive Parameters:

• Rated Speed: 1450 rpm (4-pole motor)

• Speed Range: 500 – 3600 rpm

• Rotation Direction: Clockwise (viewed from shaft end)

Materials & Construction:

• Pump Body Material: Extruded aluminum alloy (standard)

• Special Application Body: Cast iron, steel, hardened steel, stainless steel (on request)

• Driving Screw Material: C25 steel

• Driven Screws Material: Cast iron

• Seal Material: Standard VITON (FKM), optional NBR, FPM, EPDM

Media & Temperature:

• Service Media: HLP mineral hydraulic oil (DIN 51524), biodegradable fluids, synthetic fluids, HFA/HFB/HFC/HFD

• Viscosity Range: 4 – 2000 cSt (standard), up to 10000 cSt (special configuration)

• Media Temperature: -20°C to +180°C (depending on seal material)

• Ambient Temperature: -20°C to +60°C

Mounting & Connections:

• Mounting Flange: ISO 3019/2 standard

• Pipe Connections: SAE 3000 PSI or BSP threads

• Mounting Position: Any orientation

Filtration Requirements:

• Recommended Filtration: β25 ≥ 75

• Cleanliness Level: NAS 1638 Class 8 or ISO 4406 17/14

Noise Level:

• Acoustic Emissions: 52 – 68 dB(A) (@ 2950 rpm)

Key Technical Advantages

1. Ultra-Low Noise & Pulse-Free Operation via Three-Screw Principle

GR series three-screw pumps utilize three specially profiled helical screws (one driving screw + two driven screws) that mesh to create continuous, pulse-free media delivery. Compared to gear pumps and vane pumps, three-screw pumps operate with extremely low noise levels (typically 52–68 dB(A)) and completely pulse-free flow. As a globally recognized manufacturer of low-noise screw pumps, Settima’s Continuum® noise-free technology effectively eliminates acoustic emissions and vibration.

2. Extremely Wide Performance Coverage with Flexible Modular Design

The SMT16B series covers sizes from GR20 to GR110, with flow rates ranging from 8 L/min to 3400 L/min. Speed ranges from 500–3600 rpm, viscosity from 4–10000 cSt, and pressure up to 50 bar. This exceptionally wide performance coverage allows the GR series to flexibly adapt to various industrial lubrication, cooling, and circulation applications.

3. Exceptional Reliability with Minimal Maintenance Requirements

Three-screw pumps have very few moving parts—only three screws and bearings—significantly reducing the probability of mechanical failure. The pump body is manufactured from extruded aluminum alloy, with the driving screw made of C25 steel and driven screws of cast iron, ensuring excellent wear resistance and fatigue strength. The SMT16B series requires virtually no maintenance, substantially reducing total lifecycle operating costs.

4. Broad Media Compatibility & Installation Flexibility

GR series can handle media ranging from mineral hydraulic oils to biodegradable fluids, synthetic fluids, water-glycol, phosphate esters, and more. Pumps can be installed in any orientation (dry or submerged) and can operate above oil level. ISO 3019/2 standard flanges and SAE/BSP port options ensure compatibility with a wide range of industrial equipment.

5. Excellent Self-Priming Capability & Wide Viscosity Adaptability

The three-screw pump design provides excellent self-priming capability, with inlet pressure as low as -0.7 bar gauge (0.7–3 bar absolute). From low-viscosity fluids at 4 cSt to high-viscosity lubricating oils at 10000 cSt, the GR series delivers stable performance across the entire spectrum—making it the ideal choice for lubrication, cooling, and circulation applications.

Application Areas

• Steel Mill Lube Stations—forced lubrication and cooling for rolling mill gearboxes and bearings

• Power Generation—bearing lubrication systems for steam turbines and water turbines

• Mining Machinery—gearbox lubrication for large crushers and coal mills

• Paper Machinery—bearing lubrication for calenders and dryer cylinders

• Marine & Offshore—bearing lubrication and cooling for steering gears and thrusters

• Wind Power—gearbox lubrication and cooling systems

• Industrial Gearboxes—forced lubrication for various heavy-duty gearboxes

• Hydraulic Systems—low to medium pressure hydraulic circuits (up to 40 bar)

Expert Maintenance Tips

Model Code Interpretation (verify each element):

Before installation, carefully verify the complete model code on the pump nameplate—GR90-SMT16B-1500L B5 RF2—and confirm the following:

• GR90: Product series and size – 90 indicates the large-frame model in this series.

• SMT16B: SMT = Standard Mounting Type, 16B denotes the pump body series.

• 1500L: Rated flow of 1500 L/min (@ 1450 rpm).

• B5: IEC standard flange mounting configuration (flanged end cover, B5 flange).

• RF2: Configuration version code—typically indicates seal material (RF2 often FKM/VITON) and port configuration.

Verify Rotation Direction:

Standard GR series rotates clockwise when viewed from the shaft end. Before installation, confirm that the drive motor rotation matches the pump’s rotation requirement. Counter-clockwise rotation must be specified at the time of ordering. Incorrect rotation will prevent the pump from delivering media properly.

Suction Line & Inlet Pressure Requirements:

GR series screw pumps require a minimum inlet absolute pressure of 0.7 bar and a maximum of 3 bar. For GR90 and above running with 2-pole motors (approx. 2950 rpm), inlet pressure should be maintained at 0.5–3 bar. Ensure the suction line is properly sealed with no air leaks, and select suction line diameter appropriately based on flow rate to avoid cavitation.

Coupling Alignment & Installation Precautions:

Ensure that no axial or radial shaft loads are transmitted to the pump during installation. Use flexible couplings with concentricity within 0.05 mm. The pump can be installed in any orientation and can operate above oil level. Mounting flanges conform to ISO 3019/2 standard.

First-Start Priming Procedure:

After new pump installation or system overhaul, ensure the pump cavity is filled with media before first start. Jog the pump at low speed until the pump body is fully filled with oil and air is purged, then gradually increase to rated speed. Three-screw pumps must never be operated dry—running without media will cause severe wear to screws and the pump housing.

Filtration System & Oil Cleanliness Management:

Recommended filtration rating is β25 ≥ 75, with oil cleanliness meeting NAS 1638 Class 8 or ISO 4406 17/14. Regularly inspect return filter condition and replace hydraulic oil and filters per equipment manufacturer recommended intervals. Proper oil cleanliness management significantly extends pump service life.

Temperature & Viscosity Monitoring:

Maintain media temperature within the recommended range (-20°C to +180°C, depending on seal material). Excessive viscosity increases suction resistance, while low viscosity may reduce volumetric efficiency and increase internal leakage. Regularly inspect oil condition and replace if emulsified, degraded, or contaminated beyond acceptable limits.