Summary
The Electric Diaphragm Pump is a new type of pumps. In recent years break-through progress has been made in the diaphragm material, so more and more industrialized countries in the world have adopted such a pump type to replace some centrifugal or screw pumps to be appiied in such industries as petrochemicals, ceramics and metallurgy. Our diaphragm pumps include QBY pneumatic and DBY electric types, and all of our product designs are based on reference of the prototypes of American-based ABEL and have been appraised by the Ministry of Coal Industry. DBY diaphragm pumps are applicable for low pressure applications. namely the outlet pressure ≥ 3kgf/cm2, whiie QBY applicabie for applications with the outlet pressure ≥ 5kgf/cm2. This manual is for DBY disphragm pumps.
Perormanceand Characteristics
DBY series of electric diaphragm pumps has the following characteristics:
l.There is no need for water filling or diversion. and its self-priming capacity is above 7m.
Il. Its trafficability is good, and those grains, slurry or others with a diameter less than 10mm can all be passed easily.
lll.The diaphragm will be separated by the working medium and the transmission machinery. so the medium can by no means leak outwards. Besides, the pump itself has no shaft seal, so its service life is extended greatly. According to different medium types, the diaphraqm can be divided into neoprene, fluorine rubber, chemigum and so on, which can meet requirements of different users completely.
IV.Compact and light: with a planetary cycloid transmission structure, the pump can be small-size, and compared with similar pump types, both of its volume and weight are half or so.
V.The medium flow-through part on the pump body can adopt cast iron, stainless steel, rubber lining or fluorine lining, as required by users, and the motor includes three types: common, explosion-proof and speed requlation. At present the pumps is being used in the following applications.
Main Applications
1.Different kinds of virulent, inflammable or volatile liquids.
2.Different kinds of strong acid, alkali and strong-corrosion liquids.
3.Transporting high-temperature media:150℃.
4.Recovery and circulation of hot water.
5.Loading and unloading of oil tankers, oil depots and oil products.
6.Pumping of pickle, jam, mashed potato, chocolate, etc.
7.Pumping of oil paint, wood gum and pigment adhesive.
8.Different kinds of porcelain glaze, cement grout, mortar and slurry.
9.Different kinds of latex, organic solvents and packing.
10.Pumping of sewage and remaining oil from cabins of oil tankers or barges for cabin emptying.
11.Hops, yeast slurry, syrup and molasses.
12.Pumping of sewage and sediment from shafts, adits, tunnels and sewer culverts.
13.Suction and transportation of different kinds of special media.
Working Principle Diagram
The motor (3) drives the diaphragm (2) on the plungers on left and right ends through the reducer (4) to make reciprocating motions from left to right. Inside the left and right pump cavities, there are four upper and lower non-return ball vaives (1) making motions to change volumes of the working cavities and drive the four non-return ball valves to open and close alternately, thus sucking (5) and discharging (6) the liguid continually.
Installing and Overall Dimensions
Installation Dimension Diagram
Installing and Overall Dimensions
Specialnotes
(1)Oil bearings and piston shafts;
(2)The outlet pressure shall not exceed 0.3MPa
(3) It's prohibited from installing any valve at the outet:
(4) In pumping of media vulnerable to being frozen, the media inside the pump body shall be emptied and washed away after use to avoid damages.
Characteristic Durve Diagram
Key Properties and Specifications
Select the Diaphragm COrrectly
The diaphragm is a major part of this diaphragm pump and correct selection of the diaphraam can get twice the result with half the effort. The users shall note nature of their working medium in their orders so as to provide appropriate diaphragms. Generally the diaphragms include the following types:
I. Butyronitrile diaphragm, mainly for oil-proof applications.
II.Neoprene 5031#, specially made by our company, mainly for resistance to acetone and different kinds of acid and alkaline
Ill. Fluorine rubber 6021#, specially made by our company, mainly for high temperature 150℃ and resistance to methylbenzene and corrosion, but more expensive than other diaphragm types.
IV. Food rubber exclusively for transportation of food and beverage.
Structural Diagramof DBY - 15 - 25 - 40 - 50
Listof Major Partsof DBY - 15 - 25 - 40 - 50
Structural Diagramof DBY - 80 - 100
Structural Diagramof DBY - 80 - 100
Characteristicofdiaphragm
Note:○-means the long service life, △-means common service lifex, ×-means use forbidden. This table is only considered from the anti-corrosion. Because the PTFE elasticity is worse than that in rubber. The actual use life will be affected because of the pressure and pump stroke factors. The food rubber specially uses for beverage industries.
Electric Diaphragm Pump: Comprehensive Product Guide
The Electric Diaphragm Pump is a versatile and high-performance pumping solution designed for efficient and precise transfer of liquids across industrial, chemical, and commercial applications. Unlike Pneumatic Diaphragm Pumps, this electric version operates without compressed air, providing energy-efficient, low-noise, and maintenance-friendly performance.
Its design ensures compatibility with corrosive liquids, viscous fluids, and chemically aggressive solutions, making it ideal for industries such as chemical processing, water treatment, and manufacturing.
The Electric Diaphragm Pump offers a range of performance advantages that make it a preferred choice for liquid transfer applications:
Energy Efficiency
Operates on electric power, eliminating the need for compressed air.
Provides consistent flow with reduced energy consumption.
High Reliability
Robust construction with stainless steel and reinforced polymer components.
Corrosion-resistant materials ensure long-term operation with minimal maintenance.
Versatile Application
Capable of handling chemicals, acids, alkalis, viscous fluids, and water-based solutions.
Suitable for intermittent or continuous pumping tasks.
Smooth and Safe Operation
Low operational noise compared to pneumatic pumps.
Equipped with safety features such as thermal overload protection and leak-resistant diaphragms.
Ease of Installation
Compact and lightweight design allows for flexible placement in confined spaces.
Compatible with various piping and connection types.
| Parameter | Typical Values / Options |
|---|---|
| Model | Electric Diaphragm Pump |
| Pump Type | Reciprocating diaphragm |
| Flow Rate | 1 – 500 L/min (depending on model) |
| Maximum Pressure | Up to 8 bar |
| Operating Temperature Range | -20°C to 80°C |
| Motor Power | 0.25 kW – 3 kW |
| Voltage Options | 110V, 220V, 380V AC |
| Material of Wet End | Stainless Steel, PTFE, PP |
| Seals & Diaphragm Material | PTFE, Santoprene, NBR |
| Inlet / Outlet Connection | Threaded, Flanged |
| Noise Level | <70 dB |
| Certifications | CE, ISO, RoHS (depending on model) |
To ensure safety, quality, and international compliance, the Electric Diaphragm Pump is manufactured under strict quality control standards:
CE Certification – Meets European safety and performance standards.
ISO 9001 Compliance – Ensures consistent manufacturing quality.
RoHS Compliance – Restricts hazardous substances for environmentally safe operation.
Optional ATEX Certification – Available for models used in hazardous or explosive environments.
These certifications guarantee that the pump can be safely used in various industrial and commercial applications while meeting global regulatory requirements.
Proper fault diagnosis and maintenance are essential to maintain pump efficiency and service life. Common issues and solutions include:
Possible Causes: Power supply issue, motor failure, thermal overload activated.
Solutions: Verify power supply, reset thermal overload, inspect motor connections.
Possible Causes: Clogged inlet or outlet, worn diaphragm, air trapped in the system.
Solutions: Clean the pump and piping, replace diaphragm, purge air from the system.
Possible Causes: Damaged seals or diaphragms, loose fittings.
Solutions: Replace damaged seals, tighten fittings, inspect diaphragm integrity.
Possible Causes: Cavitation, high-viscosity fluids, improper mounting.
Solutions: Check fluid compatibility, ensure proper mounting, adjust flow rate.
Inspect diaphragms, seals, and valves monthly for wear.
Lubricate motor bearings if applicable.
Perform calibration checks annually to verify performance.
Replace worn or damaged components promptly to avoid operational failures.
Install the pump on a stable and level surface to reduce vibration.
Ensure proper alignment of inlet and outlet piping.
Avoid installing near heat sources or in areas with excessive dust.
Start the pump gradually to avoid pressure spikes.
Monitor flow rate and pressure during initial operation.
For chemical or corrosive fluids, flush the system with compatible cleaning solutions after use.
The Electric Diaphragm Pump is widely used across multiple industries:
Chemical Industry – Transfer of acids, alkalis, solvents, and other chemical solutions.
Water Treatment – Dosing of flocculants, chlorine, and other water treatment chemicals.
Food and Beverage – Safe handling of syrups, juices, and other food-grade liquids.
Industrial Manufacturing – Lubrication, chemical injection, and process automation.
Laboratories and Research – Precise liquid transfer for experimental setups and testing.
Energy Efficient: Eliminates the need for compressed air.
High Reliability: Durable materials reduce maintenance frequency.
Versatile: Suitable for corrosive, viscous, and water-based liquids.
Safe Operation: Low noise, thermal overload protection, leak-resistant design.
Easy Installation: Compact design suitable for confined spaces.
Global Compliance: CE, ISO, RoHS, and optional ATEX certifications.
Pumps are securely packed in foam and corrugated boxes.
Wooden crates for larger models to prevent transport damage.
Moisture-proof wrapping for overseas shipments.
Labels include model number, serial number, voltage rating, and handling instructions.
Shipping via air, sea, or express courier.
Export packaging meets international shipping standards.
Bulk shipment options available for distributors.
The Electric Diaphragm Pump provides reliable, efficient, and versatile liquid transfer across a wide range of applications. With its durable construction, energy-efficient electric operation, safety features, and compliance with international standards, it is an ideal solution for industries that demand precise and safe liquid handling.
Whether for chemical processing, water treatment, food and beverage, or industrial automation, this pump delivers consistent performance, low maintenance, and long-term reliability, making it a trusted choice for global businesses.
Phone：+86 15868545868/+8618968868555/+8618815171262
whatsapp：+86 15868545868/+8618968868555/+8618815171262
Email：haiwan@haiwanpump.cn
Add：Meiao Street, Qiaoxia Town, Yongjia County Wenzhou City, Zhejiang, China
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