Electric Diaphragm Pump

Description

The KNKE Electric Diaphragm Pump uses an efficient cycloid reducer for driving power. It operates with a crank and slider mechanism, which drives dual diaphragms in a reciprocating motion. This action creates alternating volume changes in the working chambers. The pump can continuously suction and discharge fluids. Recent advancements in diaphragm materials and production processes have significantly enhanced diaphragm durability. As a result, electric diaphragm pumps are used more frequently in the petrochemical, ceramics, and metallurgy industries. They are often replacing centrifugal and screw pumps, especially in low-pressure applications where discharge pressure is ≤3 kgf/cm².

KNKE Electric Diaphragm Pump Specifications

Parameter	Range
Nominal Diameter	10-100 mm
Flow Rate Range	0-30 m³/h
Head Range	0-60 m
Power Range	0.75 kW – 850 kW
Temperature Range	-40°C – 200°C

Main Applications of KNKE Electric Diaphragm Pump

The KNKE Electric Diaphragm Pump, with its excellent performance, is suitable for various industrial applications. Below are its main uses:

1. Corrosive Liquid Transfer

The pump efficiently handles corrosive liquids like strong acids and alkalis. This makes it ideal for harsh chemical environments, ensuring reliable and safe operations.

2. Toxic, Flammable, and Volatile Liquid Transfer

It is perfect for handling toxic substances and flammable chemicals. This application helps avoid safety hazards common in traditional pumps.

3. Construction Material Handling

The pump is highly suitable for transporting ceramic slurries, cement grouts, mortar, and other thick materials. Its excellent flow capabilities help maintain stability and reduce downtime.

4. Chemical Liquid Processing

The pump efficiently transports rubber slurry, latex, organic solvents, and fillers. It supports chemical manufacturing processes by offering a versatile and dependable solution.

5. Food and Beverage Processing

The KNKE diaphragm pump transfers hops, fermentation slurries, syrups, and molasses safely. Its food-grade features maintain the hygienic conditions required for food production.

6. High-Temperature Media Transfer

This pump is capable of transferring fluids at temperatures up to 150°C, which is beneficial for high-temperature industrial applications.

7. Food Processing Applications

It handles jams, mashed potatoes, and chocolate while preserving product consistency and texture.

8. Coatings and Chemicals

The pump can transport paints, resins, pigments, and adhesives, making it highly efficient for use in paint and chemical industries.

9. Pre-Feed for Filter Presses

It acts as a pre-feed system for filter presses, which helps enhance the overall efficiency of the system.

10. Oil Tank Cleaning

It effectively clears residual wastewater and remaining oil from oil barges. This reduces waste, improves resource efficiency, and ensures thorough cleaning.

11. Hot Water Recovery and Circulation

The pump is used for hot water recovery and circulation in industrial production. This application helps increase energy efficiency.

12. Oil Tank Loading and Unloading

It provides efficient loading and unloading of oil between tankers and storage facilities. This reduces operation times and enhances safety.

13. Mine and Tunnel Sewage Treatment

The pump effectively removes wastewater and sediment from mines, tunnels, and sewage systems, ensuring a safer and cleaner work environment.

14. Special Media Transfer

It also handles special media, making it ideal for diverse process requirements across different industries.

Key Features of KNKE Electric Diaphragm Pump

1.Strong Self-Priming Capability

The pump has a self-priming ability of up to 5 meters. This eliminates the need for priming, making it easier and more convenient to operate.

2.High Passage Capacity

The pump can pass particles up to 10 mm in diameter. It handles particulate and impurity-laden media with ease, reducing wear and improving efficiency.

3.Seal-Less Design

The pump does not use mechanical seals. Its diaphragms are chosen based on fluid properties, which extend its service life and lower maintenance needs.

4.Customizable Materials

The pump’s wetted parts can be made of cast iron, aluminum alloy, stainless steel (201, 304, 316L), rubber-lined, or fluorine-lined materials. The motor can be a standard, explosion-proof, or speed-adjustable type, ensuring suitability for varied industrial environments.

KNKE Electric Diaphragm Pump Technical Specifications

Parameter	Range
Flow Rate	0-20 m³/h
Head	30 m
Suction Lift	3-5 m
Power	0.55-5.5 kW
Speed	1450 r/min
Diameter	10-100 mm
Temperature	-15 – +150℃

Operating Conditions

1. Temperature:
   • For pumps made of cast iron, the maximum fluid temperature is ≤100°C.
   • For aluminum alloy pumps, the maximum fluid temperature is ≤80°C.
   • For stainless steel pumps, the maximum fluid temperature is ≤150°C.
2. Power Requirement: The pump requires a three-phase power supply of 380V, 50Hz. For other power requirements, please contact our technical team.

Performance Parameters of KNKE Electric Diaphragm Pump

Flow Rate (m³/h)	Head (m)	Discharge Pressure (bar)	Suction Lift (m)	Power/Speed (kW/rpm)	Inlet & Outlet Size	Operating Temperature (℃)
0.5	30	3	3	0.55/1450	3/8″ Threaded	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
0.75	30	3	3	0.55/1450	1/2″ Threaded	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
3.5	30	3	4	1.5/1450	1″ Threaded	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
4.5	30	3	4	1.5/1450	1 1/2″ Threaded	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
6.5	30	3	4.5	3/1450	50 mm Flanged	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
8	30	3	4.5	3/1450	65 mm Flanged	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
16	30	3	5	5.5/1450	80 mm Flanged	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150
20	30	3	5	5.5/1450	100 mm Flanged	Cast Iron: 90, Aluminum Alloy: 80, Stainless Steel: 150

Available Materials

Pump Body Material	Diaphragm Material
Cast Iron	NBR (Nitrile Rubber), Neoprene, PTFE, FEP
Cast Steel	NBR, Neoprene, PTFE, FEP
Aluminum Alloy	NBR, Neoprene, PTFE, FEP, Fluorine Lined
Stainless Steel	NBR, Neoprene, PTFE, FEP, Fluorine Lined
Reinforced Polypropylene (RPP)	NBR, Neoprene, PTFE, FEP
PVDF	NBR, Neoprene, PTFE, FEP

Characteristics of Different Diaphragm Materials

Medium Type	NBR	Neoprene	Fluorine Rubber	PTFE
Fuming Nitric Acid	×	×	△	△
Concentrated Nitric Acid	×	×	△	△
Concentrated Sulfuric Acid	×	×	○	△
Concentrated Hydrochloric Acid	×	△	△	△
Dilute Sulfuric Acid	△	△	△	△
Dilute Hydrochloric Acid	×	○	△	△
Benzene	×	×	○	○
Gasoline	○	○	○	○
Petroleum	△	×	○	○

Note: ○ indicates a longer lifespan, △ indicates an average lifespan, and × indicates it is not suitable. This table considers only corrosion resistance, while the actual service life depends on pressure, pump stroke, and impurities.

Usage Precautions

1. Valve Installation: Do not install standard valves at the pump outlet. If a valve is necessary, use a safety valve, ensuring the pressure does not exceed 4 bar to avoid damage.
2. Lubrication Maintenance: Regular lubrication is required to keep the system operating smoothly and reliably.
3. Temperature Control: Maintain an ambient temperature of no more than 40°C. The motor’s temperature should not exceed 75°C.
4. Medium Requirements: Ensure the medium being transported is within the pump material’s tolerance range to prevent damage.
5. Timely Cleaning: When transferring crystallizing or sediment-prone media, clean the pump immediately after use to prevent clogging or damage during the next operation.

The KNKE Electric Diaphragm Pump offers high performance, reliability, and customizable materials. It is ideal for handling complex fluid applications in multiple industries. Its versatility and robust design enable efficient and safe operations even in challenging environments.