Modular gear pumps – TGGM series

Modular gear pumps – TGGM series

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SPX Johnson TGGM gear pumps are one of the most versatile internal gear pumps available on the market designed for liquids of medium or high viscosity and high temperature. They are made for demanding applications. Their main prices are a combination of solid construction and a wide range of material designs and accessories. They are characterized by a simple principle of operation guaranteeing uniform flow with little pulsation and low energy consumption and a high level of hydraulic efficiency. The SPX TopGear GM series has a wide selection of shaft seals and can also have reversed flow direction and self-priming function.

TopGear GM series pumps are used in many industries, such as: food, chemical, paint, paper, and also in construction.

SPX Johnson TGGM gear pumps are one of the most versatile internal gear pumps available on the market designed for liquids of medium or high viscosity and high temperature. They are made for demanding applications. Their main prices are a combination of solid construction and a wide range of material designs and accessories. They are characterized by a simple principle of operation guaranteeing uniform flow with little pulsation and low energy consumption and a high level of hydraulic efficiency. The SPX TopGear GM series has a wide selection of shaft seals and can also have reversed flow direction and self-priming function.

TopGear GM series pumps are used in many industries, such as: food, chemical, paint, paper, and also in construction.

Technical specifications
Pump capacity: 130 m3/h
Max. rotational speed: 1450 RPM
Max. discharge pressure: 16 bars
Temperature: max 300 °C
Viscosity max 80 000 mPa·s
Max. particle size: 225 µm
Impeller type: gear, made of cast iron, nitrided ductile iron or stainless steel
Pump materialss: Gray cast iron
Types of sealing
Gland packing seal: Version without spacer ring: rings made of graphite-reinforced PTFE, aramid or graphite fibers.
Version with spacer ring: rings made of graphite-reinforced PTFE, aramid or graphite fibers.
Reversed version; design for chocolate: rings made of graphite-reinforced PTFE, aramid or graphite fibers.
Single mechanical seal: Burgmann MG12: Graphite/SiC/FPM or SiC/SiC/FPM
Burgmann M7N: SiC/Graphite/FPM, SiC/Graphite/PTFE jacket, SiC/SiC/FPM or SiC/SiC/PTFE-FFKM Optionally: O-ring sets made of EPDM and FFKM (Chemraz®)
Single cartridge mechanical seal: Cartex with gland packing sleeve: SiC/SiC/FPM, SiC/SiC/PTFE
Cartex with lip seal: SiC/SiC/FPM, SiC/SiC/PTFEoptionally: O-ring sets made of EPDM and FFKM (Chemraz®)
Double cartridge mechanical seal: Cartex: SiC/SiC/FPM, SiC/Graphite/FPM, SiC/SiC/PTFE-SiC/Graphite/FPM

optionally: O-ring sets made of EPDM and FFKM (Chemraz®)

Triple lip cassette seal: PTFE seals/FKM Viton (fluoroelastomer) O-rings
PTFE seals/without O-rings
Typical applications
Industry Application example
Petrochemical industry Pure asphalt or asphalt mixtures, diesel fuel, crude oil, lubricating oil, base oil, lubricants.
Chemical and dye industry Sodium silicate, acids, plastics, mixed chemicals, isocyanates, polyols.
Pulp and paper industry Acid, soap, lye, black liquor, kaolin, lime, latex, sludge.
Food industry Chocolate, cocoa butter, fillings, sugar, vegetable fats and oils, molasses, animal feed.
Product features

The TopGear (TG) series is a combination of solid construction with small or large clearances and a unique tooth profile on the driving gear. TG GM series pumps are one of the most versatile internal gear pumps available on the market. Their main prices are a combination of solid construction, flexibility in the selection of clearances, a unique shape of the interdental spaces and a wide range of material designs and additional options, such as a heating jacket, overflow valves or electric heating.

TG GM series pumps are characterized by a simple operating principle, in which the liquid flows through the pump evenly with small pulsations. They are characterized by low energy consumption and a high level of hydraulic efficiency, as well as the possibility of precise capacity regulation. These pumps can also have a reversed flow direction. Most models of the TG G series have been designed in such a way that they can operate at the normal rotational speed of an electric motor with a frequency of 50 Hz – this allows for the use of direct drive. The modular design based on many variants and options allows for perfect adaptation of the pump to a specific application.

The TG GM series also has a very wide selection of shaft seals – packed gland packing seal, single or double mechanical seal, single or double cartridge mechanical seal and triple cartridge lip seal.

Pomps in this series were created for demanding applications. They handle medium to high viscosity media and high temperature liquids perfectly. TopGear series pumps are self-priming and used in many industries, such as: food, chemical, paint, paper, and construction.

  • High performance – the pump design of this series features axial rotor locking, adjustable clearances and a balanced hydraulic design. The TG GM series is characterized by high permissible torque and a single clearance class enabling very good overall efficiency.
  • 10 sizes – a range of models with maximum performance up to 130 m3/h and 16 bar pressure, allowing the pump to be tailored to the customer’s specific requirements.
  • Better Flooding – Oversized ports for improved performance, located above the pump centerline. This translates to a lower required NPSH (Net Positive Suction Head required).
  • Designed for low or high viscosity media – unimpeded flow thanks to the optimized tooth profile on the drive gear.
  • No leaks due to thermal expansion – positive seal and pinion plug with cover.
  • Thoughtful design – based on two ball bearings with adjustable axial clearance and optional belt drive. Pumps in this series are able to withstand greater permissible axial forces.
  • Easy maintenance – possibility of disassembly and access to the pump both from the front and from the rear. Simple construction and shorter service downtimes.
  • Many material options – various bearing and hydraulic part designs available.
  • Extended service life – compact rotor, durable shafts, optimal bearing design, choice of hard metal bearings, vented sealing area thanks to bleed channel.
  • Various connection options – compliant with EN or ANSI.
  • Explosion-proof design – compliant with ATEX Directive, category II 2G.
Operation principle

Operating principle of SPX Johnson TopGear gear pumps
 

The rotor and pinion rotate and mesh with each other. This creates sealed chambers with variable volume, resulting in a vacuum that forces the medium to flow into these spaces. The liquid is transported in the chambers from the suction side to the discharge side. The spaces are separated from each other by an element that prevents the liquid from returning to the suction side. The medium is pumped to the discharge side as a result of the reduction in the volume of the interdental spaces.

Modular design
SPX Johnson TGG gear pump body. Pump housing with integrated feet and in-line ports

The pump housing can remain installed in the piping system during rotor and shaft seal inspection and repair.

SPX Johnson TGG Gear Pump Front Access Module. Front Access Module

The entire front (pinion, cover and pinion shaft) can be removed for easy internal inspection and repair.

SPX Johnson TGG Gear Pump Rear Access Module. Back access module

The rotor with shaft, intermediate housing with rotor bearing, shaft seal and bearing bracket can be removed for easy inspection, repair and shaft seal replacement.

Top mounted relief valve for SPX Johnson TGG gear pumps. Top-mounted overflow valve

The pre-assembled and adjusted overpressure relief valve can be disassembled for inspection, repair, and if it is necessary to change the direction of rotation or pressure.

Construction

SPX Johnson TGGM gear pump design.
 

1. Pump body

  • horizontal linear connections above the center line
  • available with several PN flange connections
  • ability to connect large diameter pipes
  • pressure gauge connections on both flanges
  • cork for filling, venting and draining
  • integrated feet on the pump body
  • unconstrained thermal expansion towards the rear
  • lower velocity in the pipeline and pressure losses
  • good NPSH characteristics
  • the liquid remains in the pump until the next start-up
  • easy servicing.
Front Access Module

Pinion cover in SPX Johnson TGG gear pumps. 2. Pinion cover with spigot

  • large recesses at the inlet and outlet
  • fixed pinion journal due to interference fit
  • several material options for plugs
  • Axial liquid inlet relative to the gears improves NPSHr characteristics.
  • the ability to select appropriate pinion gear materials for a given application.
Pumping Gear Heating Jacket SPX Johnson TGG. “S” or “T” type heating mantle mounted on the lid (option)

Additional front cover with heating jacket with several types of connections.

  • steam-powered version with threaded connections (type “S”),
  • thermal oil-powered version with flanged connections (type “T”)
  • heats the pump body, internal components, and relief valve body.

 

SPX Johnson TGG Gear Pump Pinion. 3. Pinion with bushing

  • unique tooth profile
  • large pinion and sleeve journal diameter
  • ability to use low and high viscosity media
  • hydrodynamic lubrication capability through pumped liquid to reduce sleeve and pinion journal wear,
  • the ability to choose the right materials needed for a given application.
Rear access module

Impeller and shaft of SPX Johnson TGG gear pump. 4. Impeller and pump shaft

  • unique tooth profile and strong rotor teeth
  • durable rotor and shaft mounting via interference fit
  • several material options
  • ability to use high-viscosity liquids
  • high torque and radial force permissible even at high temperature and with standard clearances
  • Easy installation of shaft seals without the risk of damaging the elastomers.
  • possible V-belt drive
  • the ability to choose the right materials needed for a given application.
5. Intermediate corpus

  • modular design
  • Allows for several jacket, shaft seal and electric heating options.
  • the ability to select the appropriate options needed in a given application
  • hydrodynamic lubrication by pumped fluid to reduce bushing and shaft wear
  • Special openings facilitate filling and venting and can be used for external liquid circulation or rinsing.
6. Shaft seal

  • a wide bore in the intermediate housing allows the use of several types of shaft seal
  • wide range of applications
  • large interchangeability between models and some sizes
  • short downtimes
  • high corrosion resistance
  • Easy control and servicing.
SPX Johnson TGG gear pump bearing bracket. 7. Ball bearing bracket with additional support

  • durable construction
  • long service life of ball bearings
  • easy maintenance and relubrication
  • drain port for draining liquid from the shaft seal
  • additional support enables axial thermal expansion and V-belt drive
  • Ability to readjust axial play and compensate for axial wear.
Options, accessories
Pumping Gear Heating Jacket SPX Johnson TGG. “S” type heating mantle mounted on the lid

  • designed for use with saturated steam or water vapor
  • warms the pump body, internal components, and relief valve body
  • enables safe pump start-up and shut-down
  • allows the pump to be brought to the correct temperature when the liquid solidifies or is too viscous.
  • the possibility of adding a jacket cover later without having to replace the main pump parts.
Pumping Gear Heating Jacket SPX Johnson TGG. Heating mantle type “T” mounted on the lid

Flanged version powered by thermal oil.

  • warms the pump body, internal components, and relief valve body
  • enables safe pump start-up and shut-down
  • allows the pump to be brought to the correct temperature when the liquid solidifies or is too viscous.
  • the possibility of adding a jacket cover later without having to replace the main pump parts.
SPX Johnson TGGM gear pump pinion cover. Pinion trunnion cover (available only with “T” type heating jacket option)

  • ensuring tightness between the pump interior and the heating jacket at extreme temperature and pressure
  • very tight pinion cover
  • High-temperature design – strong screws and thick cover wall.
Electric heating in the pinion journal of SPX Johnson TGGP gear pumps. Electric heating in the pinion stub (available on request for certain models only)

  • use of high-performance cartridge heaters (max. 250°C),
  • appropriate power depending on the environment in which the pump operates
  • Can be used with 110V or 230V AC power supply.
  • heats the body and interior of the pump
  • enables safe pump start-up and shut-down
  • allows the pump to be brought to the correct temperature when the liquid solidifies or is too viscous.
  • the option to replace the standard pump cover and pinion journal assembly with a new electrically heated assembly.
Electric heating in the pinion journal of SPX Johnson TGGP gear pumps. Electric heating in the pinion stub (available on request for certain models only)

  • use of high-performance cartridge heaters (max. 250°C),
  • appropriate power depending on the environment in which the pump operates
  • Can be used with 110V or 230V AC power supply.
  • heats the body and interior of the pump
  • enables safe pump start-up and shut-down
  • allows the pump to be brought to the correct temperature when the liquid solidifies or is too viscous.
  • the option to replace the standard pump cover and pinion journal assembly with a new electrically heated assembly.
Electric heating in the intermediate body in SPX Johnson TGGP gear pumps. Electric heating in the intermediate body (available only for some models)

  • use of high-performance cartridge heaters (max. 250°C),
  • appropriate power depending on the environment in which the pump operates
  • Can be used with 110V or 230V AC power supply.
  • heats the pump interior at the rear, the sleeve bearing, and the shaft seal.
  • ability to create a temperature gradient towards the shaft seal (cooling or heating)
  • enables safe pump start-up and shut-down
  • umożliwia doprowadzenie pompy do właściwej temperatury, gdy ciecz zestala się lub ma zbyt dużą lepkość. allows the pump to be brought to the correct temperature when the liquid solidifies or is too viscous.
Heating jacket around the shaft seal in SPX Johnson TGGM gear pumps. Ogrzewany płaszcz wokół uszczelnienia wału (opcja)

  • steam-powered version with threaded connections (S-jacket)
  • heats the pump interior from the rear, the sleeve bearing, and the shaft seal.
  • ability to create a temperature gradient towards the shaft seal (cooling or heating)
  • enables secure boot and shutdown procedures
  • umożliwia doprowadzenie pompy do właściwej temperatury, gdy ciecz zestala się lub ma zbyt dużą lepkość. allows the pump to be brought to the correct temperature when the liquid solidifies or is too viscous.
Top mounted relief valve for SPX Johnson TGG gear pumps. Relief valve

  • protects the pump and installation against excessive overpressure by limiting the pressure difference between the suction and discharge sides
  • mounting on top of the pump, horizontal or vertical depending on the pump size,
  • available in a double version: 2 single valves mounted opposite each other protect both flow directions through the pump,
  • optionally available with heating.
Shaft seals types
SPX Johnson TGGM gear pump gland packing packing. Packing seal (gland packing seal)

  • pre-assembled cartridge
  • several o-ring material options depending on the application
  • option with or without sealing ring
  • easy maintenance and repair
  • easy access to sealing ring connections
  • flushability
  • możliwość uwolnienia ciśnienia przez pierścień uszczelniający, translate to English ability to release pressure through the sealing ring
  • Available in inverted version (for chocolate) with external sleeve lubrication.
SPX Johnson TGG gear pump single mechanical seal.SPX Johnson TGG gear pump single mechanical seal. Single mechanical seal

  • Improved design for viscous and particulate-laden media.
  • quick and simplified maintenance
  • compliance with DIN 24960
  • Solid particles kept away from the sealing surfaces thanks to the conical shape of the cover.
  • possibility of using external flushing to improve performance and ensure lubrication of sealing surfaces,
  • possibility of cooling or heating via a jacket option in the intermediate body.
Double mechanical seal

  • compliance with DIN 24960
  • available in tandem (unpressurized) or back-to-back (pressurized) arrangements,
  • improve the performance and safety of the shaft seal
  • ability to operate in high viscosity and high abrasive load conditions.
Cartridge mechanical seal

  • good shaft seal performance
  • Easy on-site installation and replacement, reducing service time.
  • low failure rate and lower operating costs
  • Possibility to use different types and brands of mechanical seals.
  • Sealing inserts are pre-assembled and tested.
  • available in tandem (unpressurized) or back-to-back (pressurized) arrangements,
  • flushable or lubricated.
Triple cassette lip seal for SPX Johnson TGGM gear pumps. Triple lip cassette seal

  • exceptional chemical resistance
  • ability to work with very high viscosity media without clogging
  • Easy assembly and maintenance – repair kits available
  • no need for a pressure-assisted flushing system
  • low friction and limited dry running capability.
Operating principle of pressure relief valves

The operating principle of pressure relief valves in SPX Johnson TopGear gear pumps

The relief valves used in the TGGM series are spring-loaded valves that open abruptly when the operating pressure rises to the set pressure value for which the spring is pre-set. These valves limit the differential pressure (∆p) (or operating pressure) between suction and discharge, not the maximum pressure in the system. If the liquid cannot escape when the pump’s discharge side is blocked, overpressure can cause serious damage to the pump. The relief valve provides an escape route by directing the media back to the suction side once a certain pressure level is reached. An open relief valve signals that the system is not operating correctly.

  • Technical specifications

  • Typical applications

  • Product features

  • Operation principle

  • Modular design

  • Construction

  • Options, accessories

  • Shaft seals types

  • Operating principle of pressure relief valves

Pump capacity: 130 m3/h
Max. rotational speed: 1450 RPM
Max. discharge pressure: 16 bars
Temperature: max 300 °C
Viscosity max 80 000 mPa·s
Max. particle size: 225 µm
Impeller type: gear, made of cast iron, nitrided ductile iron or stainless steel
Pump materialss: Gray cast iron
Types of sealing
Gland packing seal: Version without spacer ring: rings made of graphite-reinforced PTFE, aramid or graphite fibers.
Version with spacer ring: rings made of graphite-reinforced PTFE, aramid or graphite fibers.
Reversed version; design for chocolate: rings made of graphite-reinforced PTFE, aramid or graphite fibers.
Single mechanical seal: Burgmann MG12: Graphite/SiC/FPM or SiC/SiC/FPM
Burgmann M7N: SiC/Graphite/FPM, SiC/Graphite/PTFE jacket, SiC/SiC/FPM or SiC/SiC/PTFE-FFKM Optionally: O-ring sets made of EPDM and FFKM (Chemraz®)
Single cartridge mechanical seal: Cartex with gland packing sleeve: SiC/SiC/FPM, SiC/SiC/PTFE
Cartex with lip seal: SiC/SiC/FPM, SiC/SiC/PTFEoptionally: O-ring sets made of EPDM and FFKM (Chemraz®)
Double cartridge mechanical seal: Cartex: SiC/SiC/FPM, SiC/Graphite/FPM, SiC/SiC/PTFE-SiC/Graphite/FPM

optionally: O-ring sets made of EPDM and FFKM (Chemraz®)

Triple lip cassette seal: PTFE seals/FKM Viton (fluoroelastomer) O-rings
PTFE seals/without O-rings

Performance curves