Flexible Rotor Pump Explanation

Product Details

Product Overview

The flexible rotor pump is a type of cam-type twin-rotor pump (HDRB). It is widely used and can replace various other pump types. Characterized by strong self-priming capability, large flow rate, small volume, and high cost-effectiveness, it is known as an energy-saving pump.

Product Performance:

Strong self-priming capability: Adopting an optimized structural principle, it can achieve dry self-priming up to 6 meters and material-containing self-priming up to a maximum of 9 meters.
Short self-priming time: Instant self-priming within the range of 6 meters, completed in just 2-3 seconds.
Simple structure and easy maintenance: No professional guidance is required for maintenance, and there is no need to disassemble the pump pipeline during maintenance work.
Long service life after one purchase: With few wearing parts, the pump can be used for a long time once purchased.
Small volume: Occupies minimal space in on-site equipment layouts.
Large flow rate and high efficiency: Under the same flow rate, it has the smallest power consumption and achieves the best energy-saving effect.
No noise during indoor operation: Operates quietly when installed indoors.
Ability to convey hard particles with impurities: Capable of transporting hard particles mixed with impurities.
Medium viscosity tolerance: Can convey media with a viscosity of up to 5000 centipoise (cP).

Features:

Small size, large flow rate: Generally, compared with competing pump models, it has the smallest volume under the same flow rate, facilitating installation and movement.
Instant full self-priming: No additional devices are needed, and there is no requirement for fluid replenishment before startup. The suction lift can reach 5 meters.
High-quality pump body material: The pump body is made of precision-cast stainless steel, and all wetted metal components are made of stainless steel (1Cr18Ni9Ti).
Medium viscosity adaptability: Can convey media with a viscosity of up to 2000 centipoise (cP).
Air and foam handling: Capable of conveying gas-containing liquids and foamy liquids without air lock.
Impurity resistance: Can convey media containing suspended soft and hard particles.
Gentle media protection: The gentle rotation of the rotor does not damage shear-sensitive media, such as papermaking dispersants.
Safety for flammable media: No metal contact occurs during the operation of the flexible rotor, eliminating spark generation. When equipped with an explosion-proof motor, it is particularly suitable for conveying solvents such as alcohol, gasoline, and acetone.
Aesthetic appearance, durability, and easy maintenance: Features an attractive design, long service life, and convenient maintenance.

Applications:

With its excellent self-priming performance and strong adaptability to working conditions, this pump is applied in various industrial scenarios. It is used for drum emptying, tank cleaning, suction and discharge of liquids in underground tanks, sampling, and transportation of various fluids and semi-fluids. For example, during drum emptying, it only needs to have the inlet hose inserted into the drum to completely suck out the liquid. It is widely used to replace centrifugal self-priming pumps, submersible pumps, gear pumps, single-screw pumps, and other pump types.

Chemical industry: Suitable for conveying a wide range of media, including weak inorganic acids, organic acids, alkalis, salts, oils, alcohols, ketones, and esters.

Technical Parameters

Specification	Rated Head (m)	Rated Flow Rate (m³/h)	Motor (KW)	Rotational Speed (r/min)	Power Supply (V)	Caliber
15-HDRB	30	1	0.37 (Standard / Explosion-Proof)	1400	380/220V	1/2 Inch
20-HDRB	30	2	0.55 (Standard / Explosion-Proof)	1400	380/220V	3/4 Inch
25-HDRB	30	5	0.75 (Standard / Explosion-Proof)	1400	380/220V	1 Inch
40-HDRB	30	12	1.5 (Standard / Explosion-Proof)	1400	380/220V	1.5 Inches
50-HDRB	30	18	3 (Standard / Explosion-Proof)	1400	380V	2 Inches

Working Principle

① There is an eccentric projection in the pump cavity. When the flexible blades move away from the eccentric projection, the volume between the blades continuously increases, creating a vacuum. This enables the liquid to be continuously drawn into the inlet part of the pump cavity.

② As the flexible blades rotate, the liquid is carried from the suction part of the pump cavity to the discharge part.

③ When the flexible blades come into contact with the eccentric projection again, they bend and perform a squeezing action, allowing the liquid to be discharged from the pump cavity continuously and without pulsation. This completes the entire suction and discharge process.

As the core technology of the flexible pump, the pump's impeller must have good elasticity, minimal long-term deformation, and the ability to withstand long-term high-frequency flexing without breaking or tearing. "It takes ten years to forge a single sword" — the excellent impeller elastomer technology determines the pump's outstanding performance and durability. Currently, the impeller is available in two materials: sanitary-grade nitrile rubber and EPDM (Ethylene Propylene Diene Monomer) rubber. Nitrile rubber impellers are mainly used in vegetable oil, mineral oil, oil-containing media, and fields with high hygiene requirements; EPDM rubber impellers are mainly used in a wide range of media such as weak inorganic acids, organic acids, alkalis, salts, alcohols, ketones, and sewage.