Centrifugal Pump - China Petroleum Chemical Equipment Network

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Centrifugal Pump – Core Components

Impeller Pump shaft & seal assembly Casing (volute) Suction & discharge nozzles Bearing housing

Three short English descriptions

A centrifugal pump uses a rotating impeller to generate flow and pressure. It is key equipment for liquid transfer in oil, gas and industrial systems. It features reliable structure and high efficiency for continuous operation.

Three English tags

Centrifugal Pump, Liquid Transfer Pump, Oilfield Pump Equipment

Pre-Start Preparation: Prime the pump and vent air (remove air inside the pump to avoid cavitation), close the outlet valve, open the inlet valve, and confirm the medium flow direction and valve status. Startup: Jog the motor to check the rotation direction. After confirmation, start the motor, and the impeller will gradually rotate at high speed. Conveying: Liquid is sucked in from the inlet, pressurized by the impeller, and discharged from the outlet. The flow rate is output stably according to the impeller speed. Flow Regulation: Precisely control the flow rate by adjusting the opening of the outlet valve or using a frequency converter to meet different working conditions; prolonged low-load operation is prohibited. Normal Operation and Shutdown: Monitor pressure, current and vibration parameters in real time for stable operation without abnormalities. When shutting down, close the outlet valve first and then stop the motor to prevent medium backflow from impacting the pump casing.

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产品介绍

It features simple structure, convenient operation and high efficiency, making it suitable for transporting water, oil, chemical media and other low-viscosity fluids. It is widely applied in petroleum, petrochemical, water supply, sewage treatment and industrial production systems.

Three short English descriptions

A centrifugal pump uses a rotating impeller to move liquids efficiently.

It converts mechanical energy into fluid pressure and flow.

It is widely used in oil, chemical, water and industrial processing systems.

Three English tags

Centrifugal Pump, Fluid Transfer Equipment, Industrial Liquid Pump

Types and Characteristics of Equipment

Type

Equipment Type: Applied in core fields including oil refineries, oilfield gathering and transportation, oil product storage and transportation, water plant water supply, chemical plants, and long-distance pipelines. Suitable for various working conditions from normal temperature to high temperature and from atmospheric pressure to high pressure.

Features

Core Features

Stable Operation: Adopts high-efficiency hydraulic model with low vibration and noise, suitable for long-term continuous operation (annual operation exceeds 8,000 hours). Easy Operation & Maintenance: Compact structure, simple assembly and disassembly, few wearing parts, enabling on-site personnel to perform quick maintenance and reduce overseas operation and maintenance costs. Strong Adaptability: Optional mechanical seal or packing seal, temperature resistant (-20℃ ~ 400℃), corrosion resistant (materials including 304, 316L and duplex stainless steel), and explosion-proof. Suitable for various media such as crude oil, diesel oil, chemical liquids and clean water. High Cost Performance: High localization rate, sufficient production capacity and short delivery cycle. It has obvious cost-performance advantages over similar imported pumps, making it the first choice for bulk procurement in markets such as Russia, the Middle East and Tanzania.

离心泵

A centrifugal pump transfers liquids through a high-speed rotating impeller.

离心泵

It provides stable flow and pressure for industrial fluid transportation.

离心泵

It is widely used in petroleum, chemical and water treatment systems.

Basic Principles and System Composition

Basic Working Principle

The motor drives the impeller to rotate at a high speed (usually at 1450–2900 r/min). Under centrifugal force, the liquid inside the impeller is thrown from the center to the edge, gaining kinetic energy and pressure energy simultaneously. The liquid is decelerated and pressurized in the pump casing passage before being discharged from the outlet. A low-pressure zone forms at the center of the pump casing, and external liquid is continuously drawn in under atmospheric pressure, achieving continuous fluid delivery.

Overall System Composition

Core Components: Pump casing (volute), impeller (core working component, open type / closed type), pump shaft (transmits power) Sealing System: Mechanical seal (leakfree, suitable for chemical / flammable media), packing seal (low cost, suitable for oil / water media) Support and Transmission: Bearing housing (equipped with rolling / sliding bearings), coupling (connects motor and pump shaft), base (absorbs vibration and fixes the overall structure) Auxiliary Parts: Inlet and outlet flanges, vent valve, drain valve, sight glass (for observing operating status)