Product Overview
The GR20-SMT16B-30L, GR25 SMT16B-30L-RF2-1, and GR45-SMT16B-180L-AC28-B5 are GR family members of the SMT16B Series three-screw pumps from SETTIMA, Italy. Founded in 1978, SETTIMA specializes in the design and manufacture of hydraulic three-screw pumps and screw rotor pumps, renowned for low noise, long service life, and high reliability. The GR Series three-screw pumps are also incorporated into the product portfolios of Parker and HYLINCO, offering broad interchangeability.
The SMT16B Series three-screw pumps are designed for continuous heavy-duty industrial applications, with a continuous working pressure range from 0 to 40 bar. Featuring a special screw tooth profile design, the smooth meshing surfaces between rotors deliver pulse-free, stable fluid flow—eliminating the root cause of noise at its source. The SMT16B pump is a reliable, quiet solution for industrial applications requiring long service life and extremely smooth fluid flow.
This page features three models covering GR20, GR25, and GR45 specifications:
GR20-SMT16B-30L: GR20 size, 30 L/min flow, suitable for small to medium lubrication and cooling systems
GR25 SMT16B-30L-RF2-1: GR25 size, 30 L/min flow, RF2 configuration
GR45-SMT16B-180L-AC28-B5: GR45 size, 180 L/min flow, AC28-B5 motor flange mounting
As original specification models within the SETTIMA / Parker / HYLINCO GR line, these products enable direct form-fit-function interchangeability with original units—no modifications to piping or mounting interfaces required. Our replacement solutions strictly adhere to SETTIMA technical standards and undergo 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products.
Technical Specifications
Applicable Models (Primary):
GR20-SMT16B-30L
GR25 SMT16B-30L-RF2-1
GR45-SMT16B-180L-AC28-B5
Model Code Breakdown (per SETTIMA naming convention):
GR — Three-Screw Pump Series
20 / 25 / 45 — Size designation (GR20, GR25, GR45)
SMT16B — Pump body type (short screw design for space-constrained applications)
30L / 180L — Rated flow rate (@3,000 rpm)
RF2 — Flange and port configuration code
AC28-B5 — Motor flange mounting configuration (AC = direct mounting to IEC/DIN motor, B5 = flange mount)
Series Technical Specifications (per SETTIMA official documentation):
Product Series: SETTIMA GR SMT16B Three-Screw Pump
Pump Type: Three-Screw Pump
Rated Operating Pressure: 40 bar (4 MPa)
Peak Pressure: 50 bar (5 MPa)
Speed Range: 500 – 3,600 rpm
Flow Range: 0 – 6,000 L/min
Inlet Absolute Pressure: 0.7 – 3 bar
Body Material: Aluminum Alloy Standard (Anodized Aluminum, Cast Iron, Carbon Steel optional)
Screw Material: Main screw C25 steel, side screws cast iron (nitrided or case-hardened optional)
Seal Material: FKM Standard (NBR, FPM, EPDM optional)
Rotation Direction: Clockwise from shaft end (counterclockwise optional)
Mounting Flanges: ISO 3019/2 Standard (AC direct mounting to IEC/DIN motors)
Port Connections: SAE 3000 PSI Flange / BSPP Thread
Fluid Temperature Range: -20 to +180°C (dependent on seal material)
Ambient Temperature Range: -20 to +60°C
Viscosity Range: 4 – 2,000 mm²/s (high viscosity options available)
Filtration: Inlet 100 μm, Pressure port 10–25 μm
Fluid Cleanliness: NAS 1638 Class 10 or ISO 4406 19/16
Noise Level: 52 – 68 dB(A) (@2,750 rpm, hydraulic oil)
Mounting Position: Any position
GR20-SMT16B-30L Detailed Specifications:
Rated Operating Pressure: 40 bar (4 MPa)
Peak Pressure: 50 bar
Rated Flow (@3,000 rpm): 30 L/min
Speed Range: 500 – 3,600 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Body Material: Aluminum Alloy
Fluid Compatibility: Hydraulic Oil, Lubricating Oil
GR25 SMT16B-30L-RF2-1 Detailed Specifications:
Rated Operating Pressure: 40 bar (4 MPa)
Peak Pressure: 50 bar
Rated Flow (@3,000 rpm): 30 L/min
Speed Range: 500 – 3,600 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Body Material: Aluminum Alloy
RF2 Configuration: Specific flange and port configuration
GR45-SMT16B-180L-AC28-B5 Detailed Specifications:
Rated Operating Pressure: 40 bar (4 MPa)
Peak Pressure: 50 bar
Rated Flow (@3,000 rpm): 180 L/min
Speed Range: 500 – 3,600 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Body Material: Aluminum Alloy
AC28-B5: Direct mounting to IEC/DIN motor, B5 flange mount
Key Technical Advantages
1. Three-Screw Special Profile Design — Zero-Pulsation Flow
The GR Series three-screw pumps feature a special screw tooth profile design, with smooth meshing surfaces between rotors that deliver pulse-free, stable fluid flow. The geometric design of the three screws forms sealed cavities that transport fluid axially from inlet to outlet. This design eliminates pressure fluctuation at its source, ensuring extremely stable output flow.
2. Ultra-Low Noise Operation — No Additional Noise Reduction Needed
SETTIMA focuses on noise reduction through optimized design and precision manufacturing. The SMT16B Series operates at noise levels of just 52 – 68 dB(A) at 2,750 rpm—significantly lower than conventional gear pumps. The running sound is smooth and low-frequency, barely perceptible in most industrial environments—eliminating the need for additional soundproofing or noise reduction measures.
3. Non-Contact Operation — Maintenance-Free Long Life
Three-screw pumps feature no metal-to-metal contact between screws or between screws and the pump body—relying instead on the pumped fluid to form a lubricating film. The torque required to move the side screws is transmitted hydraulically through the pumped fluid, meaning the screws rotate without wear. High-quality screw manufacturing ensures very low acoustic emission and pulsation levels. As a result, component wear is extremely low—maintenance-free operation.
4. Wide Media Compatibility and Operating Range
The GR SMT16B Series is suitable for lubricating oil, hydraulic oil, diesel, heavy oil, and various other media. Viscosity range spans 4 – 2,000 mm²/s (high viscosity options available), fluid temperature ranges from -20 to +180°C. With a speed range of 500 to 3,600 rpm and flow range of 0 to 6,000 L/min, the series flexibly adapts to diverse industrial applications.
5. Modular Design with Flexible Mounting Options
The SMT16B Series supports mounting in any position. ISO 3019/2 standard flanges are available, with AC versions enabling direct mounting to IEC/DIN motors (B5 or B14 flanges). Port connections support SAE 3000 PSI flanges and BSPP threads. Body materials include aluminum alloy, anodized aluminum, cast iron, or carbon steel, with seal options including NBR, FKM, and EPDM.
Application Areas
Lubrication Systems: Gearbox lubrication, turbine lubrication, compressor lubrication, oil station lubrication
Cooling Circulation Systems: Power pack cooling, industrial equipment cooling circulation, fan oil cooling
Filtration Systems: Low-pressure filtration, oil purifiers, lubricating oil filtration
Transfer Systems: Lubricating oil / hydraulic oil / fuel oil transfer
Energy Sector: Hydropower, wind turbine lubrication and cooling
Metallurgical Industry: Rolling mill lubrication systems
Compressor Industry: Compressor lubrication and cooling
Rubber and Plastics Industry: Injection molding machines, extruder lubrication systems
Expert Maintenance Tips
1. Installation Precautions
The GR Series three-screw pumps are uni-directional rotation pumps—verify that the system’s required rotation direction matches the pump’s identification marking before installation. Standard configuration is clockwise rotation viewed from the shaft end.
Ensure coaxial alignment between the pump and drive shaft. The drive must be free from axial and radial shaft stresses. Flexible couplings are recommended.
The pump body can be mounted in any position.
AC versions (e.g., GR45-SMT16B-180L-AC28-B5) can be directly mounted to IEC/DIN motors with B5 or B14 flanges.
Inlet absolute pressure should be maintained at 0.7 – 3 bar.
2. Fluid Management
Use mineral hydraulic oils conforming to DIN 51524 standards (HLP).
Fluid temperature should be maintained within -20 to +180°C (dependent on seal material).
Viscosity range: 4 – 2,000 mm²/s (high viscosity options available).
Inlet filtration should be no less than 100 μm; pressure port filtration should be 10–25 μm.
Fluid cleanliness should meet NAS 1638 Class 10 or ISO 4406 19/16.
Prime the pump by ensuring the housing is filled with fluid before initial start-up. Never run the pump dry. Three-screw pumps rely on the pumped fluid to form a lubricating film—dry operation will cause severe damage.
3. Start-Up & Commissioning
Use jog start method for initial start-up; verify correct rotation direction before continuous operation.
Allow the pump to run under no-load (low pressure) conditions for 2-3 minutes to purge air and ensure proper lubrication.
Gradually increase to operating pressure (up to 40 bar) while monitoring noise, temperature, and system pressure for normal operation.
4. Routine Maintenance
The GR three-screw pump itself is maintenance-free; however, regular maintenance of the entire hydraulic/lubrication system is essential for trouble-free pump operation.
Regularly inspect system fluid cleanliness and replace filters as needed.
Regularly inspect coupling wear and coaxial alignment between the pump and drive shaft.
