PLP series. Sanitary lobe pumps

PLP series. Sanitary lobe pumps

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The PLP Sanitary Lobe Pump is produced specifically for hygienic and sanitary applications within the food, chemical, and pharmaceutical industries.

The series is fully compliant with EHEDG standards and has been designed with a heavy emphasis on achieving maximum performance & efficiency whilst offering compactness, robustness, cleanability & low maintenance costs thanks to its front pull-out design.

The range consists of 11 pump sizes, depending on the flow and solids passage requirements. Like the PDSP Double Screw Pumps, the PLP Lobe Pump is entirely machined from cast Stainless Steel AISI 316L with a surface roughness of ‹.8 as standard (‹0.5 on request) to provide increased corrosion resistance.

The PLP Sanitary Lobe Pump is produced specifically for hygienic and sanitary applications within the food, chemical, and pharmaceutical industries.

The series is fully compliant with EHEDG standards and has been designed with a heavy emphasis on achieving maximum performance & efficiency whilst offering compactness, robustness, cleanability & low maintenance costs thanks to its front pull-out design.

The range consists of 11 pump sizes, depending on the flow and solids passage requirements. Like the PDSP Double Screw Pumps, the PLP Lobe Pump is entirely machined from cast Stainless Steel AISI 316L with a surface roughness of ‹.8 as standard (‹0.5 on request) to provide increased corrosion resistance.

Technical data

Competitors units employ a cast iron gear box with epoxy paint which can become eroded over time and need replacing/repairing. The pump shafts are constructed from Duplex Stainless Steel 1.4462 to provide extra rigidity in operation and the pump can be fitted with a number of different sealing options and elastomer materials to suit almost any application.

With capacities up to 60 m³/hr and discharge pressures up to 15 Bar, this range of Sanitary Lobe Pumps is suitable for a wide variety of applications. This coupled with some key features and benefits puts it apart from its competition as one of the most versatile Lobe Pumps on the market today. With the delivery of each product, the customer receives a lobe rotor tool and dummy rotors to facilitate easy removal and replacement of lobes and mechanical seals, further reducing downtime.

Max Capacity 60 m3/hr
Max Pressure 15 Bar (25 Bar upon request)
Max Viscosity ‹1’000’000 cPs
Max Temperature 140ºC
Max Solids Passage 60 mm – Model & Screw Type Specific
Lobes Bi-Wing or Quattro Lobe
Connections ¾” – 4”
Connection Types Couplings: DIN11851, DIN11864-1, SMS1145 Flanges: EN1092-1, Rectangular, DIN11864-2, ANSI Tri-Clamps: ISO2852, DIN32676, DIN11864-3
Shaft Sealing Single mech. seal SIC/SIC or TC/TC Double mech. seal SIC/SIC or TC/TCWDR Lip Seal Single O-ring Double O-ring with quench
Sealing Materials SiC / SiC or Tungsten / Tungsten
Elastomer Materials EPDM, Viton, NBR, Teflon, KALREZ, e.g. according to FDA
Wetted Parts AISI 316L (AISI 316L Mo Ni or Hastelloy CX2MW N26022 upon request)
Surface Roughness ‹0.8 Micron (Std), ‹0.5 upon request
Hardening Hard Inchromizing & Plasma Nitriding (Optional)
Drives Standard: IEC, IE2, B3/B5, IP55, isolcl. F, PTC Optional: IE3, ATEX, CSA/UL, Decentralised variable speed drive
Operating principle

The PLP Sanitary Lobe Pump is a Rotary Positive Displacement Pump. Its operation is based on the counter rotation of 2 lobes in the pump casing. Both lobes are mounted onto their own shafts which are supported by bearing cartridges mounted directly onto the pump casing. One of the pump shafts is externally driven and an internal gear assembly drives the other shaft in the opposing direction. The screws rotate synchronously in opposing directions without touching.

When the lobes rotate and pass the suction port the volume between them increases and creates a vacuum which causes liquid to enter the suction port and the pump casing. During the rotation of the lobes the fixed amount of fluid is conveyed through the pump. As the lobes approach the discharge port the volume between them decreases which creates a pressure build-up, causing the fluid to flow out of the discharge port.

PLP Sanitary Lobe Pump OPERATING PRINCIPLE

Construction

Traditional constraction vs advanced PLP constuction

PLP Sanitary Lobe Pump Comparison

Traditional constraction disadvantages

  • Long shaft overhang
  • Shaft deflection
  • Sensitive to temperature shock
  • No Front Pull Out construction
  • Not CIP approvable
  • Heavy construction

Advanced PLP construction advantages

  • Short shaft overhang – Less expansion of shaft due to high temperatures during CIP procedures.
  • Very low shaft deflection
  • Less sensitive to temperature shock
  • Complete stainless steel design – enhanced cleanliness
  • Modular design: All mechanical seal variants can be fitted to the same housing & pump can easily be switched from horizontal to vertical execution – all holes for mounting feet are pre-drilled.
  • Front Pull Out construction
  • CIP cleanable
  • “Light weight” construction
  • Technical data

  • Operating principle

  • Construction

Competitors units employ a cast iron gear box with epoxy paint which can become eroded over time and need replacing/repairing. The pump shafts are constructed from Duplex Stainless Steel 1.4462 to provide extra rigidity in operation and the pump can be fitted with a number of different sealing options and elastomer materials to suit almost any application.

With capacities up to 60 m³/hr and discharge pressures up to 15 Bar, this range of Sanitary Lobe Pumps is suitable for a wide variety of applications. This coupled with some key features and benefits puts it apart from its competition as one of the most versatile Lobe Pumps on the market today. With the delivery of each product, the customer receives a lobe rotor tool and dummy rotors to facilitate easy removal and replacement of lobes and mechanical seals, further reducing downtime.

Max Capacity 60 m3/hr
Max Pressure 15 Bar (25 Bar upon request)
Max Viscosity ‹1’000’000 cPs
Max Temperature 140ºC
Max Solids Passage 60 mm – Model & Screw Type Specific
Lobes Bi-Wing or Quattro Lobe
Connections ¾” – 4”
Connection Types Couplings: DIN11851, DIN11864-1, SMS1145 Flanges: EN1092-1, Rectangular, DIN11864-2, ANSI Tri-Clamps: ISO2852, DIN32676, DIN11864-3
Shaft Sealing Single mech. seal SIC/SIC or TC/TC Double mech. seal SIC/SIC or TC/TCWDR Lip Seal Single O-ring Double O-ring with quench
Sealing Materials SiC / SiC or Tungsten / Tungsten
Elastomer Materials EPDM, Viton, NBR, Teflon, KALREZ, e.g. according to FDA
Wetted Parts AISI 316L (AISI 316L Mo Ni or Hastelloy CX2MW N26022 upon request)
Surface Roughness ‹0.8 Micron (Std), ‹0.5 upon request
Hardening Hard Inchromizing & Plasma Nitriding (Optional)
Drives Standard: IEC, IE2, B3/B5, IP55, isolcl. F, PTC Optional: IE3, ATEX, CSA/UL, Decentralised variable speed drive

Performance curves