Product Overview
The GR40 SMT 150L SN RP T4 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, Settima Meccanica initially focused on producing high-technology three-screw pumps for the elevator industry to reduce noise and vibration in hydraulic circuits. Over more than four decades, Settima has become a globally recognized manufacturer of low-noise 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 GR40 SMT 150L SN RP T4 breakdown:
GR40: Product series and size code – 40 indicates the model size in this series
SMT: Standard Mounting Type (dry installation)
150L: Nominal flow of 150 L/min (@ 3000 rpm)
SN: Screw configuration – suitable for high viscosity and air emulsion media
RP: Configuration version code (seal and port configuration)
T4: Temperature grade code (special configuration)
We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. The GR40 SMT 150L SN RP T4 offers 100% direct interchangeability with original Settima 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: GR40 SMT 150L SN RP T4
Brand Series: SETTIMA GR Series / SMT16B Series
Pump Type: Three-screw pump
Mounting Type: Dry installation (SMT)
Flow & Pressure Parameters:
Nominal Flow: 150 L/min (@ 3000 rpm)
Rated Flow (@ 1450 rpm): Approx. 58.9 L/min
Rated Flow (@ 1450 rpm, 68 cSt): Approx. 73.3 L/min
Continuous Operating Pressure: 40 bar
Peak Pressure: 50 bar
Speed & Drive Parameters:
Rated Speed: 1450 rpm (4-pole motor)
Maximum Speed: 3000 rpm (2-pole motor)
Speed Range: 500 – 3000 rpm
Materials & Construction:
Body Material: Gray cast iron or aluminum alloy (configuration dependent)
Seal Material: FKM (Viton)
Mounting Flange: B5 flange (ø250)
Connections & Interfaces:
Pressure Connection: SAE 3000 psi 1-1/4″
Suction Connection: Axial G1-1/2″ BSP
Mounting Flange: Optional AC28 B5
Operating Conditions:
Fluid Media: Mineral hydraulic oil (DIN 51524), high viscosity fluids, air emulsions
Recommended Viscosity: 68 cSt
Viscosity Range: 4 – 2000 cSt (standard), up to 10000 cSt (special configuration)
Note: Above specifications are based on standard configuration. Actual performance may vary depending on specific configuration codes (SN, RP, T4).
Key Technical Advantages
1. Ultra-Low Noise Operation via Three-Screw Principle
GR series three-screw pumps utilize three specially profiled helical screws that mesh to create continuous, pulse-free media delivery. As a globally recognized manufacturer of low-noise screw pumps, Settima products deliver exceptionally low noise levels. The Continuum® series hydraulic screw pumps achieve noise levels of just 68 dB while delivering high-pressure power.
2. Extremely Low Pressure Pulsation & Vibration
The special helical screw design ensures continuous fluid delivery with minimal pressure pulsation. Settima screw pumps feature precision design and manufacturing, delivering extremely low vibration and pulsation while providing high efficiency across various speeds.
3. Excellent Media Compatibility & Wide Viscosity Adaptability
GR series can handle media ranging from mineral hydraulic oils to high-viscosity lubricating oils and air emulsions. The SN screw configuration is specifically designed for high viscosity and air emulsion media. Viscosity range is exceptionally wide – from 4 cSt to 2000 cSt standard, with special configurations up to 10000 cSt.
4. Modular Design with Flexible Configuration
GR series offers a wide range of configuration options. Mounting flange options include AC28 B5, pressure connections available in SAE 3000 psi or BSP threads, and suction connections in axial BSP or SAE flange. SN configuration is suitable for high viscosity and air emulsion media, while RP and T4 configurations provide additional seal and temperature adaptability.
5. Excellent Self-Priming Capability & Reliable Operation
The three-screw pump design provides excellent self-priming capability, capable of handling air-mixed media delivery. Settima’s lubrication system design represents the state of the art in low-pressure pump development, combining all the value benefits of screw pumps: low noise, low pulsation, and high self-priming capability.
Application Areas
Gearbox Lubrication Systems—forced lubrication for various industrial gearboxes
Turbine Lubrication Systems—bearing lubrication for steam and gas turbines
Paper Machinery—bearing lubrication for calenders and dryer cylinders
Elevators & Lifts—hydraulic systems
Compressors & Rotating Equipment—lubrication and cooling systems
Mining Machinery—low-pressure hydraulic and lubrication systems
Truck Hydraulic Systems—on-board hydraulic systems
Machine Tools—hydraulic and lubrication systems
Injection Molding—hydraulic systems
Expert Maintenance Tips
Model Code Verification (verify each element):
Before installation, carefully verify the complete model code on the pump nameplate—GR40 SMT 150L SN RP T4—and confirm the following:
GR40: Product series and size – 40 indicates the model size in this series.
SMT: Standard Mounting Type (dry installation).
150L: Nominal flow of 150 L/min (@ 3000 rpm).
SN: Screw configuration – suitable for high viscosity and air emulsion media.
RP: Configuration version code – seal and port configuration.
T4: Temperature grade code – indicates special temperature 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. Incorrect rotation will prevent the pump from delivering media properly.
Suction Line & Inlet Pressure Requirements:
GR series screw pumps offer excellent self-priming capability. 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. B5 flange mounting (ø250) should comply with IEC standards.
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:
Regularly inspect return filter condition and replace hydraulic oil and filters per equipment manufacturer recommended intervals. For SN configuration applications with high viscosity and air emulsion media, pay special attention to filtration system selection and maintenance. Proper oil cleanliness management significantly extends pump service life.
Temperature & Viscosity Monitoring:
Maintain media temperature within the recommended range. T4 temperature grade configuration provides wider temperature adaptability. 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.
