GR40SMT16B150LAC28/B5RF2 Three Screw Pump 40 bar 150 L/min

Product Overview

The GR40SMT16B150LAC28/B5RF2 is a low-pressure three-screw pump from the SETTIMA GR Series SMT16B platform, designed for continuous operation at 40 bar with peak pressure capability up to 50 bar. This model delivers a nominal flow of 150 L/min at 3000 RPM and features a hollow shaft design (ø28 mm) with B5 flange mounting (ø250) for direct motor coupling.

Three-screw pumps are positive displacement rotary pumps with axial flow design, featuring only three moving parts — one driving screw and two idler screws. The idler screws act as sealing elements and are hydraulically driven by the pumped fluid, with only a rolling action between the driving and idler screws, completely eliminating noise and vibration from metal-to-metal contact. The advanced design and high-precision machining of the screws ensure extremely low levels of acoustic emission and pulsation.

The GR40SMT16B150LAC28/B5RF2 is engineered with full dimensional and interface compliance to original SETTIMA specifications (SAE pressure connection 1¼” 3000 psi, axial suction connection G1½”), enabling direct interchangeability without requiring modifications to hydraulic lines or mounting brackets. Every unit undergoes 100% factory testing under simulated working conditions to guarantee consistent performance and reliability in real-world applications.

Model Code Breakdown: GR40 — Product series (GR Series, pump size 40); SMT16B — Pump type (SMT16B series, dry/submersible, low-pressure applications); 150L — Nominal flow 150 L/min; AC28 — Hollow shaft, ø28 mm; B5 — B5 flange mounting (ø250); RF2 — With adjustable safety relief valve.

Technical Specifications 

• Model: GR40SMT16B150LAC28/B5RF2

• Series: GR40 / SMT16B

• Pump Type: Three-Screw Pump

• Number of Moving Parts: 3 (1 driving screw + 2 idler screws)

• Continuous Operating Pressure: 40 bar

• Peak Pressure: 50 bar

• Nominal Flow @ 3000 RPM: 150 L/min

• Speed Range: 500 – 3600 RPM

• Shaft Type: Hollow Shaft, ø28 mm

• Mounting Flange: B5 Flange, ø250

• Pressure Connection: SAE Flange 1¼” 3000 psi

• Suction Connection: Axial G1½”

• Safety Valve: Built-in adjustable relief valve (RF2 configuration)

• Fluid Medium: Hydraulic oil, lubricating oil

• Viscosity Range: 4 – 2000 cSt

• Operating Temperature Range: -20°C to +60°C

• Installation Position: Any position (including above oil level)

• Housing Material: Aluminum alloy / GG25 cast iron

• Seal Material: FKM (Fluorocarbon rubber)

GR Series SMT16B Common Variants

• GR20 SMT16B 8L / 12L / 15L / 20L / 23L — 8–23 L/min flow

• GR25 SMT16B 25L / 30L — 25–30 L/min flow

• GR32 SMT16B 35L / 45L / 55L / 75L — 35–75 L/min flow

• GR40 SMT16B 80L / 100L / 125L / 150L — 80–150 L/min flow

• GR45 SMT16B 155L / 180L / 210L — 155–210 L/min flow

• GR55 SMT16B 250L / 300L / 330L / 380L — 250–380 L/min flow

• GR60 SMT16B 440L — 440 L/min flow

• GR70 SMT16B 800L — 800 L/min flow

• GR80 SMT16B 1200L — 1200 L/min flow

• GR90 SMT16B 1700L — 1700 L/min flow

Key Technical Advantages

1. Only Three Moving Parts for Ultimate Reliability
The three-screw pump consists of just three moving parts — one driving screw and two idler screws. The idler screws are hydraulically driven by the pumped fluid, with only a rolling action between the driving and idler screws, eliminating metal-to-metal contact wear. This minimalist design translates to fewer failure points, extended service life, and lower maintenance costs.

2. Ultra-Low Noise & Pulse-Free Flow
The advanced screw geometry and high-precision machining create sealed cavities that smoothly transport fluid axially from inlet to outlet during screw rotation. The rolling action completely eliminates noise and vibration, delivering industry-leading quiet operation ideal for noise-sensitive industrial environments.

3. Hydraulically Balanced Design with Zero Axial Load
The pump body and screw design completely eliminate any axial loads. Operating pressure creates clearances between the balancing piston of the main screw and the surrounding body, generating balanced hydrodynamic forces that simultaneously lubricate and cool the sealing components. This significantly extends bearing and seal service life.

4. Any-Position Installation for Flexible Deployment
The pump can be installed in any position, including above oil level. Both dry and submersible installation options are available, offering exceptional flexibility for system integration — particularly valuable in space-constrained applications.

5. Wide Viscosity Range & Media Compatibility
The pump handles viscosities from 4 to 2000 cSt, accommodating media from low-viscosity hydraulic fluids to high-viscosity lubricating oils. This versatility makes it suitable for hydraulic systems, lubrication systems, cooling systems, and various other industrial applications.

6. 100% Factory Testing Under Simulated Working Conditions
Every pump undergoes comprehensive performance verification on test benches that simulate actual operating conditions, including pressure-flow characterization, volumetric efficiency measurement, noise level assessment, and seal integrity testing — ensuring batch-to-batch quality consistency and reliability.

Application Areas

• Injection Molding Machines: Low-pressure hydraulic supply

• Printing Presses: Lubrication and cooling systems

• Compressors & Rotary Equipment: Lubricating oil circulation

• Mining Machinery: Low-pressure hydraulic systems

• Machine Tools: Equipment lubrication and cooling

• Wind Turbine Gearboxes: Gearbox lubrication and cooling

• Elevator Hydraulic Systems: Quiet-operation lifting equipment

• Oil & Gas Industry: Lubricating oil transfer

• Industrial Lubrication Systems

Expert Maintenance Tips

1. Model & Configuration Verification
Confirm that the complete pump model code matches your requirements, paying special attention to flow rating (80L/100L/125L/150L), shaft type (hollow shaft AC28 or others), and flange type (B5 or others). Verify the nameplate specifications against your system design requirements before installation.

2. Port Cleanliness & System Flushing
Ensure the inlet port and suction lines are free from debris, metal chips, and contaminants before installation. Three-screw pumps are sensitive to suction conditions — perform a thorough circulating flush of the entire hydraulic system to ensure clean lines.

3. Suction Condition Assurance
Three-screw pumps rely on fluid for lubrication — adequate suction conditions are essential. Keep suction lines as short and straight as possible to minimize inlet resistance. For installations above oil level, pay special attention to suction height and line sealing integrity.

4. Safety Valve Setting
The RF2 configuration includes a built-in adjustable safety relief valve. After installation, correctly set the relief valve cracking pressure according to the system’s actual operating pressure to protect both the pump and the system from overpressure damage.

5. Pre-Start Priming
Fill the pump cavity with hydraulic or lubricating oil before initial start-up to ensure adequate screw assembly lubrication. Never start the pump dry — this will cause severe wear between the screws and the liner.

6. Rotation Direction Confirmation
Verify that the pump rotation direction matches the drive motor before start-up. Three-screw pumps are typically designed for single-direction rotation only — reverse operation will reverse flow direction and may cause internal damage.

7. Fluid Cleanliness & Temperature Management
Maintain hydraulic or lubricating oil within the -20°C to +60°C operating temperature range. Replace filters regularly and monitor system oil cleanliness through routine sampling and analysis to significantly extend pump service life.