Diaphragm Metering Pumps (Standard, Heavy Duty, Explosion-Proof, Double Diaphragm, Overpressure Protection)
Diaphragm pumps change the volume of the pump chamber by driving the diaphragm to achieve the suction and discharge of liquids. Our products are designed to be leak-free and suitable for conveying corrosive, hazardous, or high-purity liquids. NEWater offers 13 series of diaphragm metering pumps, covering almost all application scenarios, especially for water treatment and chemical processing industries. Click to explore more details of different series easily.
Flow: 1.3L/H-128L/H.
Upgraded motor grade to F level with IP55 protection.
Flow: 1.3L/H-128L/H.
Features four-ball check valve design for enhanced sealing stability.
Flow: 4.2L/H-75L/H.
Made of PPS or LCP material, lightweight with excellent strength and corrosion resistance.
Flow: 12L/H-150L/H.
Flow can be manually adjusted during operation or at rest.
Flow: 4L/H-30L/H.
Equipped with a laser-printed flow scale dial, IP54-rated protection.
Flow: 4.2L/H-5800L/H.
Utilizes gear reduction for enhanced efficiency, quieter operation, and extended lifespan.
Flow: 4.2L/H-4500L/H.
High-pressure version available with optional 5-60Hz variable frequency motor.
Flow: 60L/H-400L/H.
Optional automatic pressure relief device with fully plastic steel construction except for the motor.
Flow: 4.2L/H-5800L/H.
Suitable for flammable and explosive environments.
Flow: 4L/H-5800L/H.
Simple structure with precise flow control and easy maintenance.
Flow: 10L/H-400L/H.
Ensures 100% personnel safety with zero leakage design.
Flow: 10L/H-400L/H.
Mechanically driven for safe handling of hazardous chemicals.
Flow: 4.2L/H-5800L/H.
Includes overpressure protection and diaphragm rupture alarm for enhanced safety.
Custom Metering and Dosing Pumps for Your Business
We offer a wide range of metering pumps for a variety of applications, including high pressure, explosion proof, gear, micro, mini, super, ceramic, adjustable, digital and automated models. Whether manual or electric, our pumps are carefully designed to ensure accuracy and reliability. We offer customizable options to meet the unique needs of different industries, providing the best solution for each application. Browse our product range to find the perfect pump for your specific needs.
Other Metering Pumps (Smart/Double Head Metering Pumps)
Are you looking for a highly automated, intelligent metering pump to reduce manual intervention? As a trusted metering pump manufacturer, we offer three series, including horizontal and vertical models to meet different space requirements. In addition, we also offer double-head metering pumps, which provide a larger flow option and complement our single-head solutions. Contact us now for more details or to get a free quote.
Motor-driven, with a maximum flow rate of 5800L/H, manual flow adjustment available.
LED display, temperature resistance ≥90℃, manual/automatic switching, flow and fault alarms.
Horizontal design for high-demand industrial applications supports various fluid delivery.
Precise flow control, widely used in industries like oil, chemicals, and water treatment.
Same flow and pressure with 50% power saving, self-lubricating bearings for efficiency, manual adjustment available.
Can deliver two different chemicals simultaneously, flow independently adjustable, cost-effective solution.
What is a Dosing Pump?
A dosing pump, also known as a metering pump, precisely delivers acids, alkalis, corrosive liquids, and viscous liquids. It consists of a pump head and a motor to automate dosing tasks. Dosing pumps are available in plunger pumps, chemical metering pumps, diaphragm pumps, and peristaltic pumps. These pumps control flow rates to deliver precise amounts of liquid to a system or process. They are commonly used in water treatment, chemical dosing, and other industries that require precise fluid control.
How does a Metering/Dosing Pump Work?
Metering pumps work by using a pump driver to draw liquid from a source and push it into a discharge port. Flow is controlled by adjusting stroke length and frequency to maintain consistent liquid concentration. The pumps feature manual or automatic flow control. Check valves at the inlet or outlet prevent backflow and ensure consistent liquid delivery.
Metering pumps can operate continuously or intermittently, depending on the application requirements.
Applications
- Water Treatment: Precise dosing of disinfectants (e.g., chlorine, ozone), coagulants, and pH adjusters.
- Chemical Industry: Accurate addition of reactants, catalysts, additives, and corrosive/volatile chemicals.
- Oil & Gas: Injection of scale inhibitors, corrosion inhibitors, biocides, catalysts, and additives.
- Desalination: Dosing of anti-scaling agents and disinfectants.
- Pharmaceuticals: Precise delivery of raw materials, solvents, additives, and reagents.
- Food & Beverage: Adding preservatives, colorants, flavorings, syrups, acidity regulators, and CO₂.
- Power Industry: Boiler and cooling water treatment with oxygen scavengers, corrosion inhibitors, and anti-scaling agents.
- Agriculture: Dosing fertilizers, pesticides, herbicides, disinfectants, and nutrients.
How to Start Your Order
- Share Your Requirements
Specify application, flow rate, quantity, and manual/automatic preference. - Receive Pump Recommendation
We provide suitable models or custom options based on your needs. - Confirm Selection
Approve the suggested model and order details. - Production & Quality Check
Your pump is manufactured and tested for reliability after payment confirmation. - Shipping & Delivery
Arrange shipment after final payment and share delivery details.
Pump Head
Transmission Components
Bearings
Motor Winding Wires
- Installation Display Site
- Company Strength
- FAQs
- Catalog
1️⃣ What is your business scope?
We are a professional water treatment solution provider and a sourcing service for parts and standalone equipment. We supply water quality analyzers, dosing pumps, diaphragm pumps, water pumps, PH/ORP controllers, and dosing systems.
2️⃣ Can I visit your factory?
Of course! Our factory is located in Suzhou, and you’re welcome to visit us.
3️⃣ How do you package my orders?
We use export-standard cartons or steel frame packaging with transport labels to ensure safe delivery during long-distance shipping.
4️⃣ How do you handle shipping? What terms do you offer?
We work with international logistics companies and offer EXW, FOB, and CIF terms. Samples and small orders are shipped via DHL, FedEx, UPS, or TNT, while bulk orders are shipped by sea or air according to your needs.
5️⃣ How do you customize pumps and mechanical seals?
You can send us your application data, and we will select the right pumps and seals for you. Alternatively, provide us with drawings—we excel in OEM and ODM services.
6️⃣ What is your warranty period?
Most of our main products come with a 1-year warranty.
7️⃣ What is your delivery time?
If in stock, typically 3-8 days. For non-stock items, 15-20 days depending on the quantity.
8️⃣ What payment methods do you accept?
We accept T/T, PayPal, Western Union, and Trade Assurance. Generally, we arrange shipment within 7 days after payment.
9️⃣ Who handles after-sales service?
NEWater has a professional after-sales team. We respond promptly during working hours, addressing customer feedback and providing effective solutions.
🔟 What is the minimum order quantity?
This depends on your location. We can ship even a single pump, but please consider that shipping costs may be higher than the product price, as we are based in China.
Why Buy From Us
NEWater is a reliable sourcing partner with 20 years of industry experience, offering high-quality dosing pumps at competitive prices. We are dedicated to providing exceptional service, with a professional after-sales team available 24/7 to offer customized solutions that meet your specific needs, ensuring customer satisfaction throughout the process.
We are a water treatment company based in Singapore and have built a long-term partnership with NEWater. By using their efficient and energy-saving dosing pumps, we’ve been able to increase our production efficiency by 25%. We’re extremely satisfied with both the performance of NEWater’s products and their after-sales service.
With over 10 years of industry experience, we have provided reliable solutions to customers in various countries, establishing a strong reputation for quality and service.
Our professional technical team offers comprehensive assistance from pump selection to installation, ensuring smooth operations and customer satisfaction throughout the process.
We leverage a strong supplier network to ensure timely delivery and competitive pricing, while staying informed of market trends to offer the best value.
We hold key certifications such as ISO and Explosion-proof certification, ensuring compliance with industry standards and reliability in all our offerings.
You May Also Concern
Metering pumps are categorized by attributes, applications, and working principles to meet diverse industrial needs:
By Attributes
- High-Pressure Metering Pumps
- Explosion-Proof Metering Pumps
- Compact Metering Pumps
- High-Flow Metering Pumps
By Applications
- Chemical Metering Pumps
- Industrial Metering Pumps
- Chlorine Dosing Pumps
- Pharmaceutical Metering Pumps
By Working Principles
- Diaphragm Metering Pumps
- Double Diaphragm Pumps
- Peristaltic Metering Pumps
- Piston Metering Pumps
- Gear Metering Pumps
- Solenoid-Driven Metering Pumps
Key Differences
| Type | Primary Function | Key Applications | Material/Design |
| Chemical Injection Pumps | Precise chemical injection into systems | Oil & gas, water treatment, chemical processing | High-pressure, precise dosing |
| Chemical Resistant Pumps | Handling corrosive/abrasive chemicals | Chemical manufacturing, wastewater, pharma | Chemically resistant materials (PTFE, PVDF) |
| Chemical Feed Pumps | Controlled delivery of chemicals | Water treatment, agriculture, industrial | Adjustable flow rates, automation-ready |
As a leading manufacturer and supplier of pumps, we provide a comprehensive range of chemical metering pump accessories to enhance the performance, reliability, and versatility of your systems. Here’s what we offer: pump heads, diaphragms, valves, tubing and piping, controllers and automation, seals and gaskets.
EN 
RU 
ES 
DE 
AR 
TH 
PT 
FR 
IT 
KO 
JA 