PERA-PRINZ® TWIN SCREW PUMPS EXECUTIONS
BY APPLICABLE STANDARD:
• Manufacturer Standard
• API 676
BY MOUNTING:
• Overhung Twin Screws
/ Single Volute (Single End)
/ Single Pair of Screws
• Between Bearing Twin Screws
/ Double Volute (Double End)
/ Double Pair of Screws
• Only the Radial Loads are balanced on the Single Volute Twin Screw Pumps.
• The Radial and Axial Loads are balanced on the Double Volute Twin Screw Pumps.
PERA-PRINZ® TWIN SCREW PUMPS EXECUTIONS
PERA-PRINZ® TWIN SCREW PUMPS EXECUTIONS
PERA-PRINZ® TWIN SCREW PUMPS ADVANTAGES
• Self Priming
• They ensure a constant flow, pulsation-free
• High Suction Lift Capability – the pump NPSH being very low
• Suitable to pump fluids with low, medium, high and very high viscosity.
Very well suited to pump very viscous liquids, sensitive to shear forces and turbulences thanks to the low Internal velocities given by the screws movement.
• Low Noise Level and Low Vibrations
• The Screws are Contactless and Wear out is minimized
PERA-PRINZ® TWIN SCREW PUMPS ADVANTAGES
• Flow can be reversed (reversibility) in low pressure applications, upon request
• Entrapped Air or Gas in the Liquid are tolerated up to 50-60% volume (multi-phase service on request)
• Capability of Dry Running for a limited period and in particular conditions
• Compact Design and Dimensions
PERA-PRINZ® TWIN SCREW PUMPS
GENERAL FEATURES AND PERFORMANCES
• CAPACITY: from 1 m3/h up to 3.500 m3/h [from 4.5 GPM up to 15,500 GPM]
• CASING PRESSURE: up to ANSI 900 - 149 barg [2160 Psig]
• DIFFERENTIAL PRESSURE: up to 60 bar [870 Psi]
• NPSHr: down to 1,5 meters [5 ft]
• VISCOSITIES: from 0,5 cSt up to 50.000 cSt (up to 250.000 cSt in special execution)
• PUMP NOISE LEVEL: up to 85 dB for small and medium sizes
• GAS/AIR HANDLING: Gas/Air Content up to 50% (dissolved, not slug)
• TEMPERATURE: up to 300°C [573°F]
PERA-PRINZ® TWIN SCREW PUMPS COVERAGE CHART
Pera Prinz® - Comparison between HR and HD Series
Pera Prinz® - Comparison between HR and HD Series
PERA-PRINZ® TWIN SCREW PUMPS – HM250
PERA-PRINZ® TWIN SCREW PUMPS – HM200 VERTICAL (OFFSHORE / MARINE)
PERA-PRINZ® TWIN SCREW PUMPS WITH ELECTRIC MOTOR – HD PUMPS WITH DRAIN
PERA-PRINZ® TWIN SCREW PUMPS WITH ELECTRIC MOTOR – HM PUMPS
PERA-PRINZ® TWIN SCREW PUMPS WORKING PRINCIPLE
Basic concept: two intermeshing screws, synchronized by timing gears‚ conveying the fluid without any metal-to-metal contact
This allows the pump to handle
• virtually any Newtonian or non-Newtonian fluid
• wide variety of conditions
• wide range of viscosities
• multiple phases (i.e. gas and solids)
• high temperatures
• intermittent dry running (i.e. self priming, tank stripping)
Comparison with main types on the market
PERA-PRINZ® TWIN SCREW PUMPS UNIQUE SELLING POINTS
1.Parts wear-out
2.Shear applied to the product
PERA-PRINZ® TWIN SCREW PUMPS –INFLUENCE OF VISCOSITY
PERA-PRINZ® TWIN SCREW PUMPS –INFLUENCE OF VISCOSITY
PERA-PRINZ® TWIN SCREW PUMPS UNIQUE SELLING POINTS
3.Solids handling
4.Air/gas handling
5.Variation Capacity
6. Pulsations on outflow
7. Operating speed range
PERA-PRINZ® TWIN SCREW PUMPS ADVANTAGES ON TANK STORAGE
CENTRIFUGAL PUMPS FOR TANK STORAGE:
-Capable of pumping fluids only up to approximately 150 cSt
-Generate pressure in accordance to their characteristic Curve
-Not well suitable to variable speed operation
PERA-PRINZ® TWIN SCREW PUMPS ADVANTAGES ON TANK STORAGE
TWIN SCREW PUMPS FOR TANK STORAGE:
• Capable of Operating at High Angular Speeds thanks to the screws low inertia, allowing a high range of flow rates if the pumps are driven by a Variable Speed Drive or by an Inverter
• Constant Flow regardless pressure changes (in particular when viscous fluids are pumped)
• Capability of handling a Wide Range of viscosities and pressures
PERA-PRINZ® TWIN SCREW PUMPS MAIN APPLICATIONS
OIL & GAS UPSTREAM
OIL FIELDS
OFFSHORE PLATFORMS
FPSOs & FSOs
PERA-PRINZ® TWIN SCREW PUMPS MAIN APPLICATIONS
OIL & GAS MIDSTREAM DOWNSTREAM
OIL PIPELINE
OIL TANKER / BARGE
REFINERY
PETROCHEMICAL PLANTS
TANK STORAGE TERMINALS
PERA-PRINZ® TWIN SCREW PUMPS MAIN APPLICATIONS
MARINE & SHIPBUILDING
OIL TANKERS
BARGES
CARRIERS
CRUISE SHIPS
NAVY SHIPS
SUPPORT VESSELS
PERA-PRINZ® TWIN SCREW PUMPS MAIN APPLICATIONS
PERA-PRINZ® TWIN SCREW PUMPS – TANK STORAGE
Applications for Twin Screw Pumps for TANK STORAGE:
-Pumping high or low viscosity products
-Loading / Unloading with high or low capacity
-Pumping at high or low pressure
-Circulation from Tank to Tank
-Stripping of Tank
PERA-PRINZ® TWIN SCREW PUMPS – MARINE & SHIPBUILDING
Twin Screw Pumps for Marine & Shipbuilding:
- Horizontal Executions (example some Cargo Loading/Unloading, Slops)
- Vertical Executions: More common because of space saving; different executions can be offered; Non Submerged Versions and Submerged Versions available
PERA-PRINZ® TWIN SCREW PUMPS – MARINE & SHIPBUILDING
Applications for Twin Screw Pumps for MARINE AND SHIPBUILDING:
- Cargo Pumps
- Engine Room Pumps
- Stripping and ballast water Pumps
- Bitumen tanker Pump
- Slops
- Stripping of Tank
PERA-PRINZ® TWIN SCREW PUMPS – CHEMICAL
NON-METALLIC TWIN SCREW PUMPS FOR CORROSIVE LIQUIDS
HM SERIES
PERA-PRINZ® TWIN SCREW PUMPS – CRITICAL APPLICATIONS