The GB Series is an extra high flow mechanical diaphragm metering pump designed for large-scale industrial chemical dosing. With flow rates up to 2000 L/h and a robust PTFE diaphragm with dual-diaphragm rupture detection, it delivers safe and reliable performance for demanding high-volume applications.
Widely used in petroleum, chemical, oil refining, power generation, food processing, environmental protection, mining, water treatment, textile, plastic foaming, papermaking, pharmaceutical, defense, and scientific research institutions.

| Model | Flow Rate (L/h) | Pressure (MPa) | Port Size | Stroke Speed (spm) | Power (KW) | Diaphragm (mm) | Weight (KG) |
|---|---|---|---|---|---|---|---|
| GB-350/1.0 | 350 | 1.0 | DN25 | 140 | 0.75 | 114 | 42 |
| GB-460/0.8 | 460 | 0.8 | 140 | 114 | |||
| GB-580/0.7 | 580 | 0.7 | 140 | 114 | |||
| GB-650/0.7 | 650 | 0.7 | 140 | 114 | |||
| GB-1000/0.4 | 1000 | 0.4 | 180 | 1.1 | 150 | ||
| GB-1200/0.4 | 1200 | 0.4 | 180 | 150 | |||
| GB-1400/0.3 | 1400 | 0.3 | DN40 | 180 | 160 | ||
| GB-1600/0.3 | 1600 | 0.3 | 180 | 160 | |||
| GB-1800/0.3 | 1800 | 0.3 | 180 | 1.5 | 180 | ||
| GB-2000/0.3 | 2000 | 0.3 | 180 | 180 |
| Flow Rate | 350–2000 L/h |
| Max Pressure | 1.0 MPa |
| Power | 0.75 / 1.1 / 1.5 KW |
| Stroke Speed | 140–180 spm |
| Diaphragm Size | 114 / 150 / 160 / 180 mm |
| Weight | 42 KG |
| Port Connection | DN25 / DN40 |
| Wetted Materials | PVC / PVDF / PTFE / 304 / 316 SS |
| Gearbox Material | High-Strength Aluminum Alloy |
High-strength PTFE diaphragm with excellent corrosion resistance and long service life, suitable for hazardous and corrosive fluids.
Dual-diaphragm design with rupture detection for safe handling of flammable, explosive, toxic, radioactive, and highly corrosive liquids.
Precision check valve structure with accurate metering, compact design, excellent sealing, long life, and high interchangeability.
Supports VFD motor with 4–20mA signal for flow adjustment; compatible with digital controller or stroke controller for external automatic control.
Motor mounted vertically above the gearbox to effectively prevent lubricant leakage and improve transmission reliability.
Widely used in petroleum, chemical, water treatment, food, pharmaceutical, power, environmental protection, mining, textile, papermaking, defense, and research institutions.
The GB Series Mechanical Diaphragm Metering Pump is a precision fluid delivery system designed for accurate and reliable metering of various liquids, including corrosive, viscous, and sensitive chemicals. It is commonly used in water treatment, chemical processing, pharmaceutical manufacturing, food and beverage processing, and other industrial applications where precise chemical dosing is critical for process efficiency and safety.
The GB Series Mechanical Diaphragm Metering Pump ensures accurate dosing through its design that features a mechanical diaphragm actuation, which provides a precise, repeatable stroke volume. The pump's adjustable stroke length and frequency allow for fine-tuning the flow rate, and the use of high-quality components and materials minimizes wear and tear, maintaining calibration and reliability over time. Additionally, the pump can be equipped with advanced control systems and sensors to monitor and adjust dosing in real-time, further enhancing accuracy.
The key advantages of the GB Series Mechanical Diaphragm Metering Pump include high accuracy and repeatability in dosing, capable of handling a wide range of fluids from watery solutions to highly viscous materials and corrosive chemicals. It offers excellent chemical resistance due to the diaphragm seal, minimizing the risk of leaks and contamination. The pump also features easy maintenance, with replaceable wetted parts, and can operate at various pressures, making it suitable for different industrial applications.
Yes, the GB Series Mechanical Diaphragm Metering Pump is designed to handle hazardous chemicals effectively. Its mechanical diaphragm design and use of chemically resistant materials ensure that the pump can meter corrosive, toxic, and flammable liquids safely and reliably. The pump's sealed fluid path minimizes the risk of leaks, and it can be configured with additional safety features such as leak detection and fail-safe mechanisms to ensure safe operation in critical environments.
The GB Series Mechanical Diaphragm Metering Pump requires regular maintenance to ensure optimal performance and longevity. This typically includes periodic inspection and replacement of the diaphragm and other wetted parts, lubrication of mechanical components, and cleaning of the pump and fluid lines. It is recommended to follow the manufacturer’s maintenance schedule and guidelines to prevent wear and ensure the pump operates efficiently. Regular maintenance also helps in identifying and addressing potential issues before they become critical.
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