Gear pumps for low viscosity liquids – TGL series
SPX Johnson TG L gear pumps are internal gear pumps with a compact design. They are designed for pumping thick and viscous media up to 60,000 mPa·s and 250 °C. They can be installed horizontally and vertically, also with reversed flow direction. They are characterized by a robust design and good self-priming properties, have a wide selection of shaft seals – packing seal in 3 versions and single or double mechanical seal. TopGear L series gear pumps can operate in ATEX explosion hazard zones.
SPX Johnson TG L gear pumps are designed for pumping, among others: animal feed, bitumen, coolant, fats, inks, isocyanates, molasses, oils, paints, polymers, resins, syrups in the chemical, bitumen, petrochemical, machinery and animal feed industries.
FEATURES & BENEFITS
FAST FACTS
SPX Johnson TG L gear pumps are internal gear pumps with a compact design. They are designed for pumping thick and viscous media up to 60,000 mPa·s and 250 °C. They can be installed horizontally and vertically, also with reversed flow direction. They are characterized by a robust design and good self-priming properties, have a wide selection of shaft seals – packing seal in 3 versions and single or double mechanical seal. TopGear L series gear pumps can operate in ATEX explosion hazard zones.
SPX Johnson TG L gear pumps are designed for pumping, among others: animal feed, bitumen, coolant, fats, inks, isocyanates, molasses, oils, paints, polymers, resins, syrups in the chemical, bitumen, petrochemical, machinery and animal feed industries.
| Pump capacity: | 8 m3/h | |
| Max. rotational speed: | 1400 rpm | |
| Max. discharge pressure: | 25 bar | |
| Temperature: | 250 °C | |
| Max size of solids: | 0.04 mm | |
| Viscosity: | 60,000 mPa·s | |
| Impeller type: | gear, made of stainless steel | |
| Pump materialss: | cast iron or AISI316 stainless steel | |
| Mechanical seal: | single mechanical seal gland packing packing with PTFE gland packing packing with short shaft and bearing housing (version for belt drive) gland packing packing made of pure graphite double lip seal with graphite reinforced PTFE |
|
| Industry | Application example |
| Petrochemical Industry | Pure asphalt or asphalt mixtures, diesel oil, crude oil, lubricating oil, base oil, greases. |
| Chemical and Dye Industry | Sodium silicate, acids, plastics, mixed chemical substances, isocyanates, polyols. |
| Pulp and Paper Industry | Acid, soap, lye, black liquor, kaolin, lime, latex, sludge. |
| Food Industry | Chocolate, cocoa butter, fillers, sugar, vegetable fats and oils, molasses, animal feed. |
The TopGear (TG) series combines robust construction with small or large clearances and a unique tooth profile on the active gear. The TG L series pumps are compact internal gear pumps, making them suitable for use in confined workspaces.
Mounted on a flange or bracket for foot mounting, the TG L series base fits IEC flange motors. This series can be installed both horizontally and vertically – provided the connections are not facing downwards. These pumps can also have a reversed flow direction.
The TG L series also has a very wide selection of shaft seals – packing seal (gland packing) in 3 versions, single mechanical seal or double PTFE lip seal. Built-in relief valves are also available for this series of pumps. TG L pumps can be supplied in several versions depending on the pumping conditions – they are available in a standard clearance version for media with a temperature of 140°C and in a version with increased radial and axial clearances for media with an elevated temperature – up to 250°C. In addition, the offer includes models designed for explosion hazard zones (ATEX).
The TG L series pumps also include the RBS4 pump. It is similar to the TG L018 model in terms of performance and size. All wetted parts are made of AISI 316 stainless steel, and the rotor is mounted on a double ball bearing. Thanks to their robust construction, good self-priming properties and a wide choice of seal types, TG L pumps are used to transport a wide range of media, such as: animal feed, bitumen, coolants, fats, inks, isocyanates, molasses, oils, paints, polymers, resins, syrups and concrete admixtures.
The pump contains two moving parts – a rotor and an idler gear. The idler gear is positioned eccentrically to the rotor and has fewer teeth. A crescent-shaped element on the pump cover acts as a seal between the suction and discharge ports, and also separates the liquid being transported in the pockets/chambers of the idler and rotor.

1. As the rotor shaft rotates, the volume of the chambers between the rotor and the idler gear increases, creating a vacuum. Liquid flows into the suction port.
2. Liquid flows through the pump, and the crescent-shaped element on the pump cover separates the fluid and acts as a seal between the suction and discharge ports. The meshing of the idler gear and rotor creates closed chambers containing the liquid, ensuring full volume control.
3. The pump in a fully primed state, discharging liquid through the discharge port.
![]() |
Legend: 1. Pinion Hub. 2. Pump Cover. 3. Pinion. 4. Pump Casing. 5. Impeller. 6. Gland Nut. 7. Intermediate Housing. 8. Shims. |
![]() |
Mechanical seal, type V
Single mechanical seal for oils, emulsions, detergents and others.
|
![]() |
Packing seal, type F
Asbestos-free, PTFE-impregnated seal for low and high viscosity liquids.
|
![]() |
Packing seal, type R
Pure graphite gland packing packing rings with conventional gland packing and gland packing bolts.
|
![]() |
Packing seal, type FK
Special version for belt drive with short shaft and bearing bracket (only for size TG L 095) |
![]() |
Double lip seal, type L
Double PTFE lip seals with cooling or flushing. For hazardous and difficult liquids e.g. isocyanates, solvents, paints and to prevent crystallization.
|

| Pump capacity: | 8 m3/h | |
| Max. rotational speed: | 1400 rpm | |
| Max. discharge pressure: | 25 bar | |
| Temperature: | 250 °C | |
| Max size of solids: | 0.04 mm | |
| Viscosity: | 60,000 mPa·s | |
| Impeller type: | gear, made of stainless steel | |
| Pump materialss: | cast iron or AISI316 stainless steel | |
| Mechanical seal: | single mechanical seal gland packing packing with PTFE gland packing packing with short shaft and bearing housing (version for belt drive) gland packing packing made of pure graphite double lip seal with graphite reinforced PTFE |
|