Depamu (Hangzhou Depamu Pump Technology Co., Ltd.) is a major, highly reputable industrial pump manufacturer based in China.
Here is a comprehensive breakdown of what you need to know about Depamu metering/dosing pumps:
1. Core Product Line
Depamu offers three primary types of reciprocating metering pumps tailored to different pressure, fluid, and safety requirements:
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Hydraulic Diaphragm Metering Pumps: Best for highly toxic, corrosive, volatile, or radioactive fluids.
Because the diaphragm is driven hydraulically, these pumps feature excellent leak-free safety margins and can handle very high pressures. -
Mechanical Diaphragm Metering Pumps: A more cost-effective option widely used in water and wastewater treatment.
These are great for lower pressure applications, offering excellent corrosion resistance (often equipped with PVC or PVDF pump heads). -
Plunger/Piston Metering Pumps: Designed for high-precision and extreme pressure environments. The plunger comes into direct contact with the fluid, yielding steady-state accuracy up to ±0.5%. They are ideal for clean fluids like glycol injection in oilfields.
2. Key Features & Performance Metrics
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API 675 Compliance: Their industrial pumps are built to meet international standards, notably API 675 (the global benchmark for positive displacement metering pumps), as well as CE and ISO certifications.
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High-End Capabilities: Some of their heavy-duty models can handle maximum pressures up to 50 MPa (around 500 bar) and flow rates reaching 100 m³/h, managing fluid viscosities up to 3,000 cp and temperatures up to 150°C.
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Flexible Flow Control: Flow rates are adjustable from 0% to 100% using manual, electrical, pneumatic, or variable frequency (VFD) controls.
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Multi-Head Configuration: They support modular parallel configurations, meaning up to 12 pump heads can be linked together.
This is useful either for minimizing pulse flow or blending multiple fluids proportionally.
3. Primary Applications
Depamu doesn't typically build tiny, residential pool pumps; they focus on heavy industrial sectors:
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Oil, Gas, & Petrochemicals: Chemical Injection Packages (e.g., injecting methanol, glycol, or corrosion inhibitors into wells).
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Water & Sewage Treatment: Precise dosing of flocculants, acids, bases, and disinfectants.
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Power Plants: Boiler phosphate dosing and water sampling systems.
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New Energy & Materials: High-accuracy fluid transfer for lithium battery manufacturing.
Summary: The Verdict
If you are looking for an industrial-grade dosing solution that meets international safety standards (like API 675) but want to avoid the premium price tag of top-tier American or European brands (like Milton Roy or Lewa), Depamu is a strong middle-ground contender.
Are you looking at a specific model for a project, or trying to solve a particular fluid-handling issue?