DGJY1 Mechanical Diaphragm Metering Pump

Working Principle

The electric motor delivers stable power, which is reduced in speed and increased in torque through a worm gear pair. The rotational motion is then precisely converted into linear reciprocating motion of the push rod via an eccentric mechanism, driving the mechanical diaphragm to achieve periodic elastic deformation. During contraction, the working chamber forms negative pressure, drawing in the medium. During expansion, positive pressure is generated, discharging the medium. Throughout the process, the flow remains stable and controllable, enabling high-precision metering and transfer.

Technical Specifications

Single Pump Head Flow Range: ≤2800 L/h

Pressure Range: ≤1.2 MPa

• For transporting highly corrosive, toxic, or other hazardous chemicals, a fluid end configuration with double diaphragms and a diaphragm rupture alarm device can be selected to prevent accidents caused by diaphragm failure.
• If no safety relief device is integrated, a safety valve can be installed on the pump discharge pipeline.
• Available pump head materials: PVC, PVDF, SS304, SS316, and other alloy materials.

Advantages & Highlights

• Fully Sealed, Zero Leakage
  Diaphragm static seal isolates interior from exterior—leak-free, contamination-free, enhanced corrosion resistance, ideal for complex media.

• Stable Structure, Low Maintenance
  Push rod directly drives diaphragm, minimizing failure rates. Only routine inspections and wearing parts replacement needed—high cost performance.

• Durable Diaphragm, Long Service Life
  Composite diaphragm with support plate resists wear and aging, achieving over 8,000 hours of service life—less downtime.

• Precise Adjustable Flow
  High-precision knob enables 0–100% stepless adjustment with ±1% accuracy. Adjustable during both startup and operation.

Application

Widely used in industries such as chemical processing, environmental protection, food, pharmaceuticals, wastewater treatment, municipal water supply, and new materials, the pump offers reliable performance and is capable of dosing a variety of chemical agents, including: Coagulants, bactericides, disinfectants, polymers, softeners, acid and pH control agents, corrosion inhibitors, oxygen scavengers, processing aids, and more.

Product Rendering

Company Profile

Elephant Machinery's products mainly consist of three series: plunger pumps, piston pumps, and diaphragm pumps. The power configurations for plunger pumps and piston pumps include hydraulic motors, electric motors, and diesel engines. Diaphragm pumps are available with hydraulic motor and electric motor drives. By adopting new technologies, new materials, and new processes, combined with advanced machining and testing equipment, our products feature compact structure, light weight, small footprint, appealing appearance, stable performance, long service life of wearing parts, and easy installation and maintenance.

Elephant Machinery adheres to the "Product Supremacy" philosophy, committed to providing customers across various industries with convenient, reliable, efficient, and intelligent reciprocating pump products and complete solutions. We have earned high recognition from numerous well-known enterprises both domestically and internationally.