External Gear Pump | Viscous Liquid Gear Pump
Fluid Tech Systems offers the “ROTOFLUID” brand External Gear Pump, Model “FTNX/FTBX” (Rotary Pump – Viscous Liquid Gear Pump). This heavy-duty, positive displacement rotary gear pump is designed with flange and foot mounting options for versatile installation. Model “FTNX/FTBX” is an advanced modification of the earlier “FTRN/FTRB” series, developed to deliver higher pressure with improved efficiency. The pump is built with double helical finished gears and hardened, ground shafts. This double helical gear arrangement effectively reduces axial load and side thrust, resulting in smoother operation, extended service life, and consistent performance even under demanding industrial conditions.
Model “FTBX” is a bush-bearing type pump ideal for viscous liquids that offer sufficient lubrication, making it suitable for intermittent duty cycles. For continuous duty applications, Model “FTNX” incorporates precision needle roller bearings, which ensure reliable handling of low viscosity liquids with limited lubricating value. The External Gear Pump range is available in sizes from ½" to 2" with threaded suction and delivery ends, offering both flange and foot mounting options. Larger sizes, from 2.5" to 4", feature flanged suction and delivery ends and are available with foot mounting only. These pumps operate at pressures up to 20 kg/cm², with flow capacities ranging from 5.0 LPM to 900 LPM. They are capable of handling liquids with viscosities up to 100,000 SSU and operating temperatures as high as 200°C, making them highly suitable for diverse industrial 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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