GR55SMT16B250LRP Settima Screw Pump 40bar 250L

roduct Overview

The GR55SMT16B250LRP is a core model in the Settima SMT16B low-pressure three-screw pump series, engineered for continuous heavy-duty industrial service. Featuring a balanced triple-screw axial design with self-lubricating bearings, it delivers virtually pulsation-free flow and exceptionally low noise. As part of the GR20/GR25/GR32/GR45/GR55/GR60/GR80 family, it offers excellent drop-in interchangeability with original Settima and compatible Parker three-screw pumps. Every unit undergoes 100% simulated operating-condition testing to verify displacement, pressure capability and volumetric efficiency. Suitable for mineral oils, synthetic fluids, fuel oils and eco-friendly hydraulic media in lubrication and transfer systems.

Technical Specifications 

• Model: GR55SMT16B250LRP (GR55 SMT16B 250L RP)
• Series: Settima SMT16B low-pressure three-screw pump (GR20–GR80 range)
• Type: Dry installation (SMT16B), fixed-displacement triple-screw pump
• Nominal flow: 250 L (approx. 2950–3000 rpm)
• Continuous operating pressure: 40 bar
• Peak/intermittent pressure: 50 bar
• Speed range: 500–3600 rpm
• Inlet pressure: min. –0.7 bar abs., max. 3 bar
• Shaft: Standard cylindrical Ø32 mm (for bellhousing/coupling), clockwise rotation (viewed from shaft end)
• Ports: SAE 3000 PSI (suction 2½″, pressure 2″) or BSPP option
• Housing material: Standard aluminum alloy (cast iron “G” option available)
• Screw material: Alloy steel main screw, cast-iron idler screws
• Seals: Standard NBR (FKM/EPDM or mechanical seal options)
• Weight: approx. 15.5 kg (aluminum housing)
• Control: RP externally adjustable relief valve (typically 5–25 bar range)
• Viscosity range: approx. 4–2000 cSt (high-viscosity screw treatments S1–S4 available)
• Fluid temperature: –20 °C to +180 °C (seal dependent)
• Mounting flange: ISO 3019/2 compliant with IEC standards

Key Technical Advantages

1. Precision triple-screw meshing with inherent force balance produces near-zero pulsation and high volumetric efficiency, minimizing system vibration and secondary noise-abatement costs.
2. Low acoustic emission (typically 52–68 dB(A)) combined with self-lubricating main bearings supports extended continuous-duty life.
3. Lightweight aluminum housing (or reinforced cast-iron option) with hardened alloy-steel main screw provides excellent wear and corrosion resistance across mineral oils, HFA/HFB/HFC emulsions, phosphate esters and fuel oils.
4. Full series interchangeability (GR20–GR80) with standardized flanges, shafts and ports enables true drop-in replacement and simplified spare-parts management, reducing downtime.
5. Optional high-viscosity screw treatments (S1–S4) and externally adjustable relief valve (RP) adapt to cold starts and varying duty cycles while enhancing system protection.

Application Areas

• Turbine and generator lubrication/cooling systems in power plants
• Oil & gas, refinery and offshore platform fuel-oil and lube-oil transfer
• Industrial hydraulic power units, filtration/cooling loops and precision control circuits
• Marine, chemical and paper-industry low-noise media transfer
• Auxiliary lubrication pumps for mobile and stationary power packages

Expert Maintenance Tips

Ensure the drive imposes no axial or radial loads; use ISO 3019/2-compliant bellhousings and flexible couplings with alignment within manufacturer limits. Before first start-up, verify suction-line integrity and filtration (recommended 100 µm suction, 10–25 µm pressure). Monitor fluid cleanliness routinely (target NAS 1638 Class 10 or ISO 4406 19/16). Check shaft seals and relief-valve settings periodically. For high-viscosity fluids, confirm the correct screw treatment option and never run dry. During long-term storage, drain or fill with protective oil and rotate the shaft manually at intervals. Always replace seals and screw sets with original-specification components to maintain volumetric efficiency and interchangeability.