Self Priming Centrifugal (SP Series)

Overview

The Finish Thomson SP Series is a range of leak-free magnetic drive, self-priming centrifugal pumps. They combine fast, reliable and powerful performance with corrosion-resistant materials that withstand the rigours of the most demanding applications. SP self-priming pumps combine deep lift capabilities - dry lift priming up to 7.6 metres - and fast priming - 5.5 metres in 90 seconds.

The series consists of 4 models with a maximum flow rate of 45 m³/hr and a maximum differential head to 38 m. SP pumps are suitable for transferring fluids with viscosities up to 150 cP, such as sulphuric acid, phosphoric acid and sodium and potassium hydroxide. Maximum operating temperatures are 82°C for the polypropylene version and 104°C for the PVDF version. SP models are designed for a maximum working pressure of 6.2 bar.  ATEX versions are available for pumping flammable liquids or for installation in areas with explosive atmospheres.

SP pumps benefit from magnetic drive technology, meaning no seals to replace and zero leakage. All models have Neodymium-Iron-Boron inner magnets, the most powerful and efficient available, completely encapsulated in unfilled polypropylene or PVDF for superior magnet protection. The outer drive allows measurement-free drive installation for perfect magnet alignment, permitting maximum power transmission.  The SP series pump casing retains fluid for re-priming when not running thereby negatinh the need for any check valve.

A wide variety of optional components and materials are available to suit your application. When fitted with chemical grade carbon bushing, SP pumps can be run dry for extended periods without damage. The temperature of the shaft remains cool during dry-run conditions, allowing fluid to be admitted without waiting for the shaft to cool. Shafts are available in high purity alumina ceramic, Hastelloy® C, or SiC.

SP Series pumps can be mounted to NEMA and IEC motor frames while NPT or BSP threads, adjustable flanges or union connections make it easy to connect to most process systems, reducing installation cost and time.  For environments lacking a traditional source of electricity, a gas engine option, using a commercial Honda gas engine, is available. All models have a close coupled, back pullout architecture allowing straightforward installation and rapid dismantling and re-assembly.

Typical industrial uses include sump emptying, transferring from underground storage tanks and tanker trucks, pumping in systems that are liable to have trapped or entrained air, or in process systems where run-dry protection is needed.

All pumps in the range come with a 5-year manufacturer’s warranty

Features & Benefits

Specifications

Maximum lift up to 7.6 metres of lift

Fast priming up to 4.6 metres in 90 seconds

Maximum working pressure 6 Bar

Maximum specific gravity  1.8

Maximum temperature: Polypropylene - 82°C PVDF - 104°C

Maximum viscosity 50 cP

Design Features

Thermoplastic Priming Chamber

Functions as a fluid reservoir and features molded-in 'gooseneck' suction passage eliminating the need for internal check valves.  Integral fill and drain ports are standard. Available in GF-PP or CF-PVDF for optimal corrosion resistance.  The O-ring creates airtight seal between the inner volute and the 'gooseneck' suction passage.  Helps the pump maintain the vacuum required for proper priming.

Multiple Connections

NPT or BSP threads, raised face adjustable flanges or union.

Separator Plate

Acts as a barrier between the low velocity fluid reservoir and the high velocity area in the rear of the priming chamber.  Openings allow liquid to flow to the impeller and discharge the air/liquid mixture created during priming back into the fluid reservoir.

Inner Volute

Houses the rotating impeller.  Special design allows air to be efficiently removed from the suction passages for fast priming.

Multiple Impeller Diameters

Allows hydraulic requirements to be precisely met.  Two piece impeller design allows impeller to be changed without having to replace inner drive.

Run Dry System

The SP can run dry without damage when equipped with a chemical grade carbon bushing in optimum operating conditions.  This helps protect the pump from operator errors and system upsets.

Easy Set Outer Drive

Measurement-free outer drive ensures optimum magnet alignment and easy motor installation.

Gas Engine Option for DB/SP Series Magnetic Drive Pumps

Finish Thompson has developed a petrol /diesel engine option for the DB and SP Series magnetic drive centrifugal pumps.  The option is ideal for applications where an electrical supply is not available.

Applications

• Sumps
• Underground storage tanks
• Rail cars
• Tanker trucks
• Over-the-wall applications
• Tanks with an opening on top
• Piping systems that tend to have trapped or entrained air
• When run dry protection is need

Other Info

Downloads

• Finish Thompson Model SP10 Datasheet
• Finish Thompson Model SP11 Datasheet
• Finish Thompson Model SP15 Datasheet
• Finish Thompson Model SP22 Datasheet
• Finish Thompson SP Series Catalogue

Useful Links

  AdBlue (Diesel Exhaust Fluid) Information

  Introduction to the SP Series of Self Priming Pumps 

  Assembly of the Model SP10 Self Priming Pump

  Assembly of the Model SP11 Self Priming Pump

  Assembly of the Model SP22 Self Priming Pump

  Disassembly of the Model SP11 Self Priming Pump

  Disassembly of the Model SP11 Self Priming Pump

Case Studies