Top 10 Manufacturers Of Hydraulic Diaphragm Metering Pump In China 2026

As global industries continue to demand higher precision, safety, and automation in fluid handling systems, hydraulic diaphragm metering pumps have become essential equipment in sectors such as petrochemical processing, water treatment, pharmaceuticals, power generation, mining, and chemical dosing. China has emerged as one of the world's leading manufacturing hubs for hydraulic diaphragm metering pumps thanks to its strong industrial supply chain, advanced engineering capabilities, and competitive production costs.

In 2026, Chinese manufacturers are not only competing on price but also on innovation, API compliance, intelligent control systems, corrosion resistance, and long-term operational reliability. For international buyers, selecting the right supplier requires evaluating production capability, certification standards, export experience, R&D strength, and after-sales service.

Below is an industry overview of the top hydraulic diaphragm metering pump manufacturers in China that are attracting attention from global procurement professionals.

A hydraulic diaphragm metering pump is a positive displacement dosing pump designed to deliver precise volumes of liquid under high pressure. Unlike mechanical diaphragm pumps, hydraulic diaphragm pumps use hydraulic oil to actuate the diaphragm, providing higher accuracy, better pressure stability, and enhanced diaphragm protection.

These pumps are widely used for:

Chemical dosing systems

Petrochemical injection applications

Wastewater treatment

Oil & gas processing

Boiler water treatment

Pharmaceutical production

Food and beverage processing

Key advantages include:

Leak-free operation

High dosing precision

Strong corrosion resistance

Ability to handle hazardous liquids

Long service life under continuous operation

When sourcing hydraulic diaphragm metering pumps from China, overseas buyers should pay attention to the following factors:

API 675 certification ensures the pump meets international standards for controlled-volume positive displacement pumps used in critical industrial applications.

Manufacturers should offer various wetted materials such as SS316, duplex stainless steel, PTFE, PVDF, Hastelloy, and titanium for aggressive chemical environments.

High-quality hydraulic diaphragm metering pumps typically provide accuracy within ±1%.

Modern dosing systems increasingly require PLC integration, remote monitoring, VFD control, and smart flow adjustment.

Suppliers with global project experience generally provide better documentation, certifications, logistics support, and after-sales service.

Founded in Hangzhou National Economic & Technological Development Zone, the company specializes in metering pumps, high-pressure reciprocating pumps, pneumatic diaphragm pumps, chemical dosing systems, and water treatment equipment. The company introduced advanced German technology and management systems in the early 1990s and has continuously invested in fluid transportation R&D for decades.

Depam is particularly attractive to overseas buyers because of its strong engineering capability and international certifications. The company has obtained multiple patents, built advanced digital testing platforms, and developed numerous proprietary diaphragm pump technologies. Its products comply with API standards and are widely used in petrochemical, nuclear energy, oil & gas, environmental protection, and industrial water treatment industries.

Another important advantage is the company's large-scale manufacturing capacity and technical strength. According to company information, Depam operates multiple assembly lines and testing platforms with annual production capacity reaching tens of thousands of pump units. The company also maintains cooperation with universities and research institutes to continuously improve intelligent fluid equipment solutions.

For international procurement teams seeking reliable hydraulic diaphragm metering pump suppliers in China, Depam offers several core advantages:

Advanced German-influenced hydraulic diaphragm technology

API, CE, ISO, and EAC certifications

Strong OEM and customized project capability

Complete chemical dosing package solutions

Experience serving oil & gas, petrochemical, and nuclear industries

Export coverage across more than 50 countries and regions

Professional after-sales support and rapid response service

Its growing international presence and high-end industrial application experience make Depam one of the most competitive hydraulic diaphragm metering pump manufacturers in China for 2026.

Shanghai Kaiquan is one of China's best-known industrial pump manufacturers, offering metering pumps and industrial fluid solutions for municipal and industrial applications. The company has strong R&D capabilities and extensive domestic infrastructure project experience.

Ligao focuses on dosing pumps, chemical injection systems, and hydraulic diaphragm pumps. Its products are widely exported to Southeast Asia, the Middle East, and Europe.

Ailipu is recognized for precision metering technology and automated dosing systems. The company provides complete chemical dosing packages for water treatment and industrial process control.

Nanfang Pump Industry manufactures various industrial pumps, including dosing pumps for water treatment and chemical transfer applications. The company emphasizes energy efficiency and intelligent control systems.

Dongkai specializes in diaphragm metering pumps, plunger pumps, and dosing skids. The company has built strong competitiveness in customized chemical dosing solutions.

As part of an international dosing technology group, SeKO China offers advanced diaphragm metering pumps and digital dosing systems for industrial automation and water treatment applications.

Yonjou supplies industrial pumps for oil, chemical, pharmaceutical, and environmental industries. The company provides customized diaphragm pump solutions with international certifications.

Shanghai Chengduan manufactures precision metering pumps and high-pressure dosing systems with applications in power plants, wastewater treatment, and petrochemical industries.

ProMinent China is well known for intelligent chemical dosing technology, digital metering pumps, and integrated fluid control systems for industrial processing applications.

China continues to dominate the global industrial pump supply chain because manufacturers can provide:

Competitive manufacturing costs

Mature industrial ecosystems

Flexible OEM/ODM production

Fast delivery times

Advanced CNC machining capability

Strong export logistics infrastructure

Increasingly sophisticated R&D capabilities

Additionally, many Chinese manufacturers are shifting from low-cost competition toward high-value engineering solutions, especially in petrochemical, energy, and environmental protection industries.

The hydraulic diaphragm metering pump industry in 2026 is increasingly influenced by:

Smart monitoring systems

Industrial IoT integration

Energy-efficient pump design

AI-assisted dosing control

Corrosion-resistant composite materials

Remote maintenance capabilities

Modular chemical dosing skids

Manufacturers capable of integrating intelligent automation with reliable hydraulic diaphragm technology will continue gaining global market share.

China's hydraulic diaphragm metering pump industry has evolved into a globally competitive sector supported by strong engineering expertise, mature manufacturing infrastructure, and continuous technological innovation. For international buyers seeking reliable industrial dosing solutions, Chinese suppliers now offer excellent combinations of quality, customization, certification, and cost efficiency.

Among the leading companies, Depam (Hangzhou) Pump Technology Co., Ltd. stands out for its advanced hydraulic diaphragm technology, strong R&D investment, international certifications, and extensive application experience in demanding industrial sectors such as oil & gas, petrochemical processing, nuclear energy, and water treatment. Its commitment to innovation, quality control, and global customer service makes it a highly recommended partner for overseas procurement professionals looking for dependable hydraulic diaphragm metering pump solutions from China.