Gear pumps with mechanical seal – TGGS series
SPX Johnson TGGS to mechanically sealed internal gear pumps. Their main features 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 or overflow valves. They are characterized by a simple operating principle in which the liquid flows through the pump evenly with little pulsation. These pumps can also have a reversed flow direction.
TGGS gear pumps are used for pumping oils and lubricating fluidsincreased or low viscosity, and also high-temperature media. TGGS gear pumps are used for pumping oils and lubricating fluids with increased or low viscosity, as well as high-temperature media. TopGear series pumps are self-priming and are used in many industries, such as: food, chemical and construction industries.
FEATURES AND BENEFITS
FAST FACTS
SPX Johnson TGGS to mechanically sealed internal gear pumps. Their main features 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 or overflow valves. They are characterized by a simple operating principle in which the liquid flows through the pump evenly with little pulsation. These pumps can also have a reversed flow direction.
TGGS gear pumps are used for pumping oils and lubricating fluidsincreased or low viscosity, and also high-temperature media. TGGS gear pumps are used for pumping oils and lubricating fluids with increased or low viscosity, as well as high-temperature media. TopGear series pumps are self-priming and are used in many industries, such as: food, chemical and construction industries.
| Pump capacity: | 80 m3/h | |
| Max. rotational speed: | 1450 rounds/min | |
| Max. discharge pressure: | 10 bars | |
| Temperature: | 200 °C | |
| Viscosity: | 5000 mPa·s | |
| Max. particle size: | 190 µm | |
| Impeller type: | gear, made of cast iron, nitrided ductile iron or stainless steel | |
| Structural materials: | Gray cast iron | |
| Mechanical seal | single type: 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 Roplan RTI 239: SiC/Graphite/FPM Optionally: O-ring sets made of EPDM and FFKM (Chemraz®) |
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| Industry | Example of use |
| Petrochemical industry | Pure asphalt or asphalt mixtures, diesel fuel, crude oil, lubricating oil, base oil, lubricants. |
| Chemical and dye industry | Glycerin, polyols and polyurethanes. |
| Food industry | Fats and vegetable and animal oils. |
The TopGear (TG) series is a combination of solid construction with small clearances and a unique tooth profile on the drive gear. TG GS series pumps are mechanically sealed internal gear pumps. Their main features 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 or overflow valves.
Pumps in the TG GS series feature a simple operating principle in which the liquid flows through the pump evenly with minimal pulsations. These pumps can also have a reversed flow direction. Most models in the TG G series are designed to operate at the normal rotational speed of a 50 Hz electric motor – allowing for direct drive.
Pumps of this series are used for pumping oils and lubricating liquids with increased or low viscosity, as well as high-temperature media. TopGear series pumps are self-priming and are used in many industries, such as: food, chemical, and construction.

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.
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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. |
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Front Access Module
The entire front (pinion, cover and pinion shaft) can be removed for easy internal inspection and repair. |
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Back pull-out design
Impeller with shaft, intermediate housing with rotor bearing, shaft seal and bearing bracket can be removed for easy inspection, repair and replacement of the shaft seal. |
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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. |

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1. Pump body
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| Front Access Module
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2. Pinion cover with spigot
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3. Pinion with bushing
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| Rear access module
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4. Impeller and pump shaft
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5. Intermediate corpus
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6. Single mechanical seal
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7. Ball bearing bracket with additional support
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“S” type heating mantle mounted on the lid
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Relief valve
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Relief valves used in the TG GS series are spring-loaded valves that open abruptly when the operating pressure rises to the set pressure value, which the spring is preset to. 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 discharge side of the pump 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 working properly.
| Pump capacity: | 80 m3/h | |
| Max. rotational speed: | 1450 rounds/min | |
| Max. discharge pressure: | 10 bars | |
| Temperature: | 200 °C | |
| Viscosity: | 5000 mPa·s | |
| Max. particle size: | 190 µm | |
| Impeller type: | gear, made of cast iron, nitrided ductile iron or stainless steel | |
| Structural materials: | Gray cast iron | |
| Mechanical seal | single type: 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 Roplan RTI 239: SiC/Graphite/FPM Optionally: O-ring sets made of EPDM and FFKM (Chemraz®) |
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