Unique Pump Systems, Kailash Industrial Complex, Vikhroli (W)

uniquepump@gmail.com +91 9820625476 +91 9819830689
Unique Pump Systems, Kailash Industrial Complex, Vikhroli (W)

Buy Gear Pump — UA Series

UNIQUE PUMP SYSTEMS®
Model UA Series (UA-5 to UA-800 including SP variants)
Material Mild Steel · Stainless Steel · Cast Iron · Gun Metal · Bronze · Super Alloys · Carbon Steel / Stainless Steel (Hardened Gears & Shafts)
Specification
Up to 70 kg/cm² 2–6000 LPM High temp fluids (Steam Jacketed) Up to 100,000 CST 50–1500 RPM 3/8"–8" connections
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📞 Speak to an Expert - Free ⭐ Industrial grade · 2 year warranty
Unique Pump Systems Rotary Gear Pump - Model 9
Unique Pump Systems Rotary Gear Pump - Model 10
Unique Pump Systems Rotary Gear Pump - Model 11
Unique Pump Systems Rotary Gear Pump - Model 12
Unique Pump Systems Rotary Gear Pump - Model 1
Unique Pump Systems Rotary Gear Pump - Model 2
Unique Pump Systems Rotary Gear Pump - Model 3
Unique Pump Systems Rotary Gear Pump - Model 4
Unique Pump Systems Rotary Gear Pump - Model 5
Unique Pump Systems Rotary Gear Pump - Model 6
Unique Pump Systems Rotary Gear Pump - Model 7
Unique Pump Systems Rotary Gear Pump - Model 8
Unique Pump Systems Rotary Gear Pump - Model 13

Unique Pump Systems UA Series — Rotary Gear Pump Range

India's Trusted Rotary Gear Pump Manufacturer — Now Serving Kolkata

Kolkata and its surrounding industrial belt cover a wide mix of manufacturing — heavy engineering units, jute and tea processing, and chemical plants across Howrah and the Haldia corridor. Each of these needs a different kind of fluid handling, from lubrication on an engineering line to process chemical transfer in a Haldia plant, and our UA Series range is built to cover both ends. See our full Gear Pump range below.

We manufacture from our Mumbai facility and have supplied into the Kolkata region for years. Below is our complete specification range, working principle and performance data, followed by what's specific to sourcing here.

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How Does a Gear Pump Work?

Understanding the working principle of a rotary gear pump helps you select the right unit and maintain it effectively. Here is a step-by-step breakdown of the operating cycle:

Gear pump working principle diagram - oil flow through gear pump

Schematic diagram of an external rotary gear pump showing the fluid path from inlet to outlet

1

Fluid Enters at the Inlet

As the gears rotate and unmesh on the inlet side, expanding cavities between gear teeth create a low-pressure zone. This draws fluid in from the suction port smoothly — no priming required for most viscous fluids.

2

Fluid is Trapped and Carried

The fluid is captured within the pockets formed between each gear tooth and the pump casing. As the gears rotate, this trapped volume is carried around the outer casing — from the low-pressure inlet toward the high-pressure outlet.

3

Gears Re-mesh and Build Pressure

At the outlet side, the gear teeth come back into mesh, squeezing the fluid out of the tooth pockets and forcing it through the discharge port under controlled, consistent pressure — up to 70 kg/cm² in our UA Series.

4

Constant, Pulse-Free Delivery

The result is a steady, metered flow that varies only with rotational speed — not pressure fluctuations. This predictability makes gear pumps ideal for metering, dosing, and applications where a constant delivery rate is critical to your process.

UA Series Gear Pump — Complete Product Range & Specifications

Our UA Series covers the widest capacity range available from any single rotary gear pump manufacturers in India — from compact 2 LPM units for precision dosing to heavy-duty 6,000 LPM models for bulk fluid transfer. Every model is manufactured to the same exacting standards at our Mumbai facility.

Model No. Suction X Delivery Size Capacity Range LPM Std. Pump Speed RPM
UA-5 3/8" x 3/8" 2 To 5 1440
UA-10 1/2" x 1/2" 6 to 20 1500
UA-15 3/4" x 3/4" 21 to 30 1500
UA-15SP 3/4" x 3/4" 31 to 50 1500
UA-20 1" x 1" 51 to 75 1500
UA-25 1 1/2" x 1 1/2" 76 to 100 1500
UA-25 SP 1 1/2" x 1 1/2" 101 to 160 1500
UA-50 2" x 2" 161 to 225 1500
UA-50 SP 2 1/2" x 2 1/2" 226 to 350 1500
UA-100 3" x 3" 351 to 550 1500
UA-100 SP 3" x 3" 351 to 750 1500
UA-200 4" x 4" 751 to 1200 1500
UA-400 4" x 4" 1201 to 1800 960
UA-600 6" x 6" 1801 to 2500 960
UA-800 8" x 8" 2501 to 6000 720

Operating Speed Recommendations Based on Viscosity

Running your gear pump at the correct speed for your fluid viscosity is critical to achieving maximum efficiency, seal life, and longevity. Use this guide — or consult our engineers for a precise recommendation:

Viscosity Range (CST) Recommended Pump Speed (RPM)
Up to 400 1440
400 to 1000 960
1000 to 3500 720
3500 to 10000 500
10000 to 50000 200–300
50000 & above Please Consult Our Engineers

GENERAL TECHNICAL SPECIFICATIONS FOR GEAR PUMP

Unique Pump Systems — Complete engineering data, viscosity guidelines, multi-speed performance, and model options

Speed Recommendation for Various Viscosities

Viscosity Range (CST) Pump Speed (RPM)
up to 400 1440
400 to 1,000 960
1,000 to 3,500 720
3,500 to 10,000 500
10,000 to 50,000 200 - 300
50,000 & Above Please Consult

UNIQUE PUMP SYSTEMS - GEAR PUMP SPECIFICATIONS @ 1440 RPM

Model Size Capacity (LPM) Pressure (Kg) LPM @ Pressure HP RPM
UA 5 3/8" X 3/8" 5 3 Kg 5 0.5 1440
5 Kg 4.5 0.5 1440
7 Kg 4 0.5 1440
UA 10 1/2" X 1/2" 12 3 Kg 11 0.5 1440
5 Kg 10 0.75 1440
7 Kg 9 1 1440
UA 15 3/4" X 3/4" 25 3 Kg 23 1 1440
5 Kg 22 1 1440
7 Kg 21 1.5 1440
UA 15 SP 3/4" X 3/4" 45 3 Kg 42 1.5 1440
5 Kg 38 1.5 1440
7 Kg 35 2 1440
UA 20 1" X 1" 60 3 Kg 57 3 1440
5 Kg 55 3 1440
7 Kg 52 3 1440
UA 25 1.5" X 1.5" 125 3 Kg 120 3 1440
5 Kg 115 5 1440
7 Kg 110 5 1440
UA 25 SP 1.5" X 1.5" 175 3 Kg 170 3 1440
5 Kg 165 5 1440
7 Kg 160 7.5 1440
UA 50 2" X 2" 250 3 Kg 240 7.5 1440
5 Kg 230 7.5 1440
7 Kg 215 10 1440
UA 50 SP 2.5" X 2.5" 325 3 Kg 315 10 1440
5 Kg 305 12.5 1440
7 Kg 290 15 1440

UNIQUE PUMP SYSTEMS - GEAR PUMP SPECIFICATIONS @ 960 RPM

Model Size Capacity (LPM) Pressure (Kg) LPM @ Pressure HP RPM
UA 20 1" X 1" 42 3 Kg 40 3 960
5 Kg 39 3 960
7 Kg 36 3 960
UA 25 1.5" X 1.5" 88 3 Kg 84 3 960
5 Kg 81 5 960
7 Kg 77 5 960
UA 25 SP 1.5" X 1.5" 123 3 Kg 119 3 960
5 Kg 116 5 960
7 Kg 112 7.5 960
UA 50 2" X 2" 175 3 Kg 168 7.5 960
5 Kg 161 7.5 960
7 Kg 151 10 960
UA 50 SP 2.5" X 2.5" 228 3 Kg 221 10 960
5 Kg 214 12.5 960
7 Kg 203 15 960

UNIQUE PUMP SYSTEMS - GEAR PUMP SPECIFICATIONS @ 720 RPM

Model Size Capacity (LPM) Pressure (Kg) LPM @ Pressure HP RPM
UA 20 1" X 1" 60 3 Kg 29 3 720
5 Kg 28 3 720
7 Kg 26 3 720
UA 25 1.5" X 1.5" 125 3 Kg 60 3 720
5 Kg 58 5 720
7 Kg 55 5 720
UA 25 SP 1.5" X 1.5" 175 3 Kg 85 3 720
5 Kg 83 5 720
7 Kg 80 7.5 720
UA 50 2" X 2" 250 3 Kg 120 7.5 720
5 Kg 115 7.5 720
7 Kg 108 10 720
UA 50 SP 2.5" X 2.5" 325 3 Kg 158 10 720
5 Kg 153 12.5 720
7 Kg 145 15 720

High Capacity & Special Models

Model Size Capacity Range (LPM) Pressure / Remarks
UA 100 3" X 3" 350 to 550 Please consult our Application Engineer.
UA 100 SP 3" X 3" 350 to 750 Please consult our Application Engineer.
UA 200 4" X 4" 750 To 1200 Please consult our Application Engineer.
UA 400 4" X 4" 1200 to 1800 Please consult our Application Engineer.
UA 600 6" X 6" 2000 Please consult our Application Engineer.
UA 500 (Special) 3" X 3" 700 Please consult our Application Engineer.
UA 800 (Special) 4" X 4" 1750 Please consult our Application Engineer.

Model Options & Configuration Codes

Coding System: UA V M F X SJ HP SS — Each suffix adds specific functionality to the base pump.

Specification Type Application
Without Pressure Relief Valve UA Standard pump
With Pressure Relief Valve V Protect system from discharge line obstruction
With Mechanical Seal M Positive Sealing / Minimum Leakage (Packed pump can be retrofitted)
Flange Mounted F Provides vertical mounting facility
With External Bearing X Externally lubricated pump recommended where liquid does not contain lubricating properties
Steam Jacketed Type SJ Suitable for LSHS, FO, HFO, Glucose, Soap stock, High viscosity Oils, Wax, Grease, Coal Tar, Bitumen, Adhesives etc.
Higher Pressure HP Precision profile ground gear enables pressure up to 70 kg/cm²
Stainless Steel SS For food products & liquids that react with CI & other materials

Note: Special Non-Standard Models — UA 500, UA 800 and other customized designs available for specific applications. Contact engineering team for tailored solutions.

Performance Curves of Rotary Gear Pump

Performance curves help you understand how your gear pump will behave across its operating range — and are essential for verifying that the selected model will deliver the required flow at your system's discharge pressure. Unlike centrifugal pumps whose flow drops sharply with increasing pressure, a gear pump's performance curve is nearly flat — confirming constant flow across a wide pressure range.

Rotary Gear Pump Performance Curves - Pressure vs Capacity, Pressure vs Power Consumption

Performance curves showing Pressure vs Capacity & Pressure vs Power Consumption for rotary gear pump

Input B.H.P. to Pump Calculation

BHP (Rated) = Work Done / (Constant × Efficiency)

Q = [Capacity in m³/hr × Pressure in kg/cm²] / [27 (Hydraulic Constant) × Efficiency]

Relief Valve Operation

Built in pressure relief valve is provided in pumps to operate at higher than rated pressure i.e. it starts operating at 1 kg/cm² higher than rated pressure and fully opens 20% higher than rated pressure, taking maximum 30% higher power than rated power.

For model-specific and application-specific performance curves with exact data for your selected UA Series model and fluid viscosity, please contact our application engineering team.

📄 Request Performance Data

Cross Section of Standard UA Series Gear Pump

Understanding the internal construction of a gear pump helps you appreciate the engineering precision that goes into every Unique Pump Systems product — and why our pumps outlast cheaper alternatives.

Cross section diagram of UA Series rotary gear pump

Illustrative cross-section of a UA Series external gear pump showing key internal components. Contact us for detailed engineering drawings.

Why Kolkata's Industries Choose Us

Engineering, processing and chemical units around Kolkata each look for something slightly different in a pump supplier. Here's what keeps them with us:

  • Robust cast iron and carbon steel models for lubrication duty in heavy engineering units
  • Chemical-resistant metallurgy options for process transfer around the Haldia corridor
  • Direct manufacturer pricing without a West Bengal dealer layer
  • Import-substitute manufacturing for units running an ageing imported pump
  • Wide capacity range (2-6000 LPM) covering both engineering and process-chemical applications
  • 2-year warranty with spares availability across the region

Other Products from Unique Pump Systems

Beyond our industry-leading range of rotary gear pumps, Unique Pump Systems manufactures a comprehensive portfolio of industrial pumps and sealing solutions — engineered to the same exacting standards that our customers have trusted since 1988.

Lobe Pump

Hygienic rotary lobe pumps for food, beverage, pharmaceutical, and cosmetic applications requiring gentle, shear-sensitive fluid handling.

Centrifugal Pump

High-efficiency centrifugal pumps for water, low-viscosity fluids, and large volume transfer applications across industrial sectors.

Mechanical Seal

Precision-engineered mechanical seals designed to eliminate leakage and extend pump shaft seal life across a wide range of process fluids.

AODD Pump

Air-operated double diaphragm pumps for safe handling of flammable, toxic, or abrasive fluids — no electricity required, inherently safe design.

Kolkata Gear Pump — Frequently Asked Questions

Questions we hear most often from Kolkata's engineers and buyers:

Yes, we regularly supply gear pumps for lubrication and hydraulic oil circulation to engineering units in the Howrah belt. Share your flow rate and viscosity and we'll recommend the right model.

Yes, we offer SS316, alloy 20 and other corrosion-resistant metallurgy options suited to process chemical transfer common in the Haldia corridor.

Standard UA Series models dispatch from our Mumbai works and typically reach Kolkata within 3-4 days. Custom configurations take longer, confirmed at the time of order.

Yes, send us the drawing or a sample and we'll manufacture a matching or improved import-substitute at our Mumbai facility.

Yes, as the manufacturer we hold spares for every UA Series model and can dispatch replacement parts directly to your facility.

Need a Gear Pump for Your Kolkata Facility?

Share your flow rate, fluid type and pressure requirement, and our application engineers will recommend the right UA Series model — with fast dispatch to Kolkata.

📄 Request a Quote 📞 Call Our Engineer

⭐ 2-Year Warranty  |  Serving Kolkata Since 1988  |  Free Application Engineering Support

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Unique Pump Systems also designs and manufactures import-substitute pumps based on drawings — and in certain cases manufactures gear pumps as per samples provided by customers.

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Unique Pump Systems

Kailash Industrial Complex, Vikhroli West, Mumbai

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