External Gear Pump | Positive Displacement Gear Pump for Viscous Liquids
As a leading External Gear Pump Manufacturer, Fluid Tech Systems offers the trusted “ROTOFLUID” brand External Gear Pump, Model FTNX/FTBX. This high-performance Positive Displacement Gear Pump is specifically designed for handling viscous liquids in demanding industrial applications. The heavy-duty rotary pump features both flange and foot mounting options, ensuring flexible installation across various processing systems. The FTNX/FTBX series is an advanced upgrade of the earlier FTRN/FTRB models, developed to deliver higher pressure capability with improved efficiency.
This External Gear Pump is engineered with double helical finished gears and hardened, ground shafts, ensuring durability and reliable performance. The double helical gear design significantly reduces axial load and side thrust, resulting in smoother pump operation, reduced vibration, and longer service life. As a robust Positive Displacement Gear Pump, it provides consistent and accurate flow even under challenging industrial conditions.
Model FTBX is a bush-bearing type External Gear Pump, ideal for pumping viscous liquids that provide adequate lubrication, making it suitable for intermittent duty operations. For continuous duty applications, Model FTNX is equipped with precision needle roller bearings, allowing efficient handling of low viscosity liquids with limited lubricating properties.
The ROTOFLUID Positive Displacement Gear Pump range is available in sizes from ½" to 2" with threaded suction and delivery ports, offering both flange and foot mounting options. Larger models from 2.5" to 4" feature flanged suction and delivery connections and are supplied with foot mounting configuration.
These External Gear Pumps can operate at pressures up to 20 kg/cm², with flow capacities ranging from 5 LPM to 900 LPM. They are capable of handling liquids with viscosities up to 100,000 SSU and temperatures up to 200°C, making them an ideal Positive Displacement Gear Pump solution for chemical, oil, lubrication, and industrial fluid transfer applications.
External Gear Pump | Material of Construction
| Part | Material For FTNX | Material For FTBX |
| Pump Body | CI/CS | CI/CS |
| Front Cover | CI/CS | CI/CS |
| Back Cover | CI/CS | CI/CS |
| Gland Cover | CI/CS | CI/CS |
| Rotor/Stator Shaft | EN-19 | EN-19 |
| Gear | EN-24/EN-353 | EN-24/EN-353 |
| Needle/Bush Bearing | INA/IKO [Japan] | Non- Ferrous |
| Wear Plate | Non- Ferrous | Non- Ferrous |
| Sealing | “GFO” Pack Teflon / Mech. Seal | “GFO” Pack Teflon / Mech. Seal |
| R.V. Housing | Mild Steel | Mild Steel |
| R.V. Piston | EN – 8 | EN – 8 |
| R.V. Spring | Spring Steel | Spring Steel |
| R.V. AD. Screw | EN-8 | EN-8 |
| Key | EN-8 | EN-8 |
| Hex - Bolt | Mild Steel | Mild Steel |
External Gear Pump | Technical Specification
| Model FTNX/FTBX | Suction & Delivery Size | Capacity at 1440 RPM | ||
| LPM | US GPM | M³/hr | ||
| 050 - S | ½" x ½" | 05 | 1.3 | 0.3 |
| 050 - M | ½" x ½" | 8.3 | 2.2 | 0.5 |
| 050 - L | ½" x ½" | 16 | 04.4 | 1.0 |
| 100 - S | 1" x 1" | 25 | 06.6 | 1.5 |
| 100 - M | 1" x 1" | 33.3 | 08.8 | 2.0 |
| 100 - L | 1" x 1" | 41.6 | 11.0 | 2.5 |
| 125 - S | 1¼" x 1¼" | 50 | 13.2 | 3.0 |
| 125 - M | 1¼" x 1¼" | 60 | 16.6 | 3.6 |
| 125 - L | 1¼" x 1¼" | 83 | 22.0 | 5.0 |
| 150 - S | 1½" x 1½" | 100 | 26.5 | 6.0 |
| 150 - M | 1½" x 1½" | 125 | 33.0 | 7.5 |
| 150 - L | 1½" x 1½" | 150 | 39.7 | 9.0 |
| 200 - S | 2" x 2" | 166.6 | 44.1 | 10.0 |
| 200 - M | 2" x 2" | 200 | 53.0 | 12.0 |
| 200 - L | 2" x 2" | 250 | 66.2 | 15.0 |
| 250 - S | 2 ½" x 2 ½" | 300 | 79.5 | 18.0 |
| 250 - M | 2 ½" x 2 ½" | 333 | 83.3 | 20.0 |
| 250 - L | 2 ½" x 2 ½" | 350 | 92.7 | 21.0 |
| 300 - S | 3" x 3" | 400 | 106.0 | 24.0 |
| 300 - M | 3" x 3" | 450 | 119.0 | 27.0 |
| 300 - L | 3" x 3" | 600 | 159.0 | 36.0 |
| 400 - S | 4" x 4" | 700 | 185.5 | 42.0 |
| 400 - M | 4" x 4" | 800 | 212.0 | 48.0 |
| 400 - L | 4" x 4" | 900 | 238.5 | 54.0 |
External Gear Pump | Features
The External Gear Pump models FTNX and FTBX are designed with advanced features that make them reliable, durable, and highly efficient for demanding applications:
- Designed to handle high pressure up to 20 Bar.
- Heavy-duty construction ensures durability for continuous operation in industrial environments.
- Modified tooth profile enhances gear performance, reducing wear and increasing operational life.
- Optional floating gear design ensures uniform load distribution across gears.
- Double helical gear arrangement prevents axial load and minimizes side thrust for smooth functioning
- Shorter bearing span minimizes bending effects, ensuring stability during operation.
- Low leakage paths are achieved by design, improving volumetric efficiency and reducing energy losses.
External Gear Pump | Application
The External Gear Pump is widely used across various industries due to its ability to handle a broad range of liquids, from low-viscosity fuels to high-viscosity oils. Its robust design makes it an ideal choice for continuous industrial processes:
- Power plants for fuel oil transfer and lubrication systems.
- Steel plants for pumping heavy oils and lubricants.
- Cement plants for handling viscous additives and fuels.
- Bitumen plants for asphalt and tar pumping applications.
- Petroleum industries for transferring refined and crude products.
- Refineries for precise and continuous pumping operations.
- Pumping stations for bulk loading and unloading of liquids.
- General liquid transfer operations in industries requiring reliability and consistency.
FAQs about External Gear Pump
Q1. How durable is an external gear pump?
External gear pumps are highly durable due to their robust design and precision-engineered components, making them suitable for continuous operation in demanding conditions.
Q2. Can external gear pumps handle high-pressure applications?
Yes, external gear pumps are commonly used in high-pressure hydraulic and lubrication systems because of their efficient performance and consistent flow delivery.
Q3. What are the common industries using external gear pumps?
They are widely used in chemical, pharmaceutical, food processing, oil, and manufacturing industries for precise fluid transfer and circulation tasks.
Q4. Do external gear pumps support viscous fluids?
Yes, they are effective for handling a wide range of fluid viscosities, including oils, resins, and other thick liquids.
Q5. How much maintenance does an external gear pump require?
External gear pumps require minimal maintenance, typically involving periodic inspection, lubrication, and checking for wear in gears and bearings.
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