Industrial pumps are at the heart of fluid handling in Indian factories. Yet, many engineers and procurement teams face confusion with technical jargon. This glossary explains the most common industrial pump terminology in simple words.
Whether you work in pharmaceuticals, food processing, chemicals, or water treatment, this guide will help you understand pump specifications, datasheets, and conversations with vendors more clearly.
Key Takeaways
- Pump terminology often uses abbreviations and technical phrases.
- A clear understanding improves pump selection and maintenance.
- This glossary covers positive displacement, centrifugal, and hygienic pump terms.
Pump Terminology Glossary
Below is an A–Z-style list of important industrial pump terms.
A
- AOD/AODD Pump – Air Operated (Double) Diaphragm pump that runs on compressed air and uses flexible diaphragms to move fluids.
- API 610 – International standard for centrifugal pumps in the petroleum and petrochemical industries.
- Air Chamber – A chamber in diaphragm pumps that balances pulsations and ensures smoother flow.
B
- Back Pressure – The resistance against which a pump must work, usually from pipework or system pressure.
- Bearing Housing – A section of a pump that contains and supports the bearings for the shaft.
- Baseplate – Mounting platform for securing a pump and motor.
C
- Cavitation – Damage caused when vapour bubbles form and collapse inside a pump due to low pressure.
- Centrifugal Pump – A pump that moves liquid using a rotating impeller.
- Check Valve – A one-way valve that prevents reverse flow.
D
- Dead Heading – Running a pump against a closed discharge line, which can damage certain pump types.
- Diaphragm – A flexible membrane in AODD pumps that displaces liquid during operation.
- Double Mechanical Seal – A sealing system with two seals used for hazardous or abrasive fluids.
E
- Efficiency – Ratio of pump output power to input power, expressed as a percentage.
- Elastomers – Rubber-like materials (such as EPDM and Viton) used in pump diaphragms and seals.
- Explosion Proof Pump – A pump designed to operate safely in explosive atmospheres (ATEX certified).
F
- Flow Rate – Volume of liquid pumped per unit of time, usually in liters per minute (L/min).
- Foot Valve – A check valve installed at the suction side to maintain prime.
- Flooded Suction – When the liquid source is positioned above the pump inlet to ensure gravity-fed priming.
H
- Head – A measure of the pressure a pump develops, expressed in metres of liquid column.
- Hygienic Pump – A pump built with smooth surfaces and a cleanable design for food and pharma use.
- Housing – The external casing of a pump.
I
- Impeller – Rotating part of a centrifugal pump that moves liquid.
- Inlet Pressure – Pressure at the suction side of a pump.
- ISO 2858 – Standard covering dimensions and performance of end-suction centrifugal pumps.
N
- NPSH (Net Positive Suction Head) – The pressure required at the pump suction to avoid cavitation.
- Nominal Diameter (DN) – Standardized size designation for pump connections.
P
- Positive Displacement Pump – A pump type that moves fluid by trapping a fixed amount and forcing it out.
- Priming – The process of removing air from the pump and suction line before starting.
- Pulsation Dampener – A device that smooths the flow in diaphragm and dosing pumps.
S
- Self-Priming – Pump’s ability to draw liquid into itself without external priming.
- Slurry – A mixture of liquid and solid particles, often abrasive.
- Stuffing Box – Part of a pump that holds packing material to prevent leakage along the shaft.
V
- Viscosity – A measure of a liquid’s resistance to flow, e.g., honey has high viscosity.
- Volute – Spiral casing in a centrifugal pump that converts velocity into pressure.
- Valve Ball/Seat- Key check valve parts in diaphragm pumps controlling flow direction.
Why This Glossary Matters for Indian Engineers
- Reduces confusion in vendor discussions
- Helps in reading pump datasheets
- Improves understanding of maintenance manuals
- Supports the training of new engineers and operators
Frequently Asked Questions
What does AOD stand for in pumps?
AOD means Air Operated Diaphragm.
What is the difference between head and pressure?
Head is expressed in meters of liquid column, while pressure is in bar or pascal.
Why is NPSH important?
It ensures a pump runs without cavitation and damage.
What is the most common industrial pump in India?
Centrifugal pumps are most common due to their efficiency and versatility.
Are hygienic pumps different from standard pumps?
Yes, hygienic pumps follow sanitary design for food and pharma use.