Industrial Chemical Dosing Pumps
Engineered for continuous, highly accurate chemical injection with ±1% repeatability. Built with corrosion-resistant PP, PVDF, PTFE, and SS316 wetted parts.
Zero-Leakage Sealless Design for Aggressive Chemicals
Sando Rotary dosing pumps utilize chemically inert PTFE diaphragms with hydraulic or motorized backing, completely eliminating mechanical shaft seals and preventing hazardous liquid leaks in aggressive acid, alkali, and oxidant dosing duties.
Micrometer Stroke Adjustment
Linear flow modulation from 0% to 100% while pump is running or stopped.
Multi-Liquid Compatibility
Handles sulfuric acid, sodium hypochlorite, PAC, caustic soda, polymers, and antiscalants.
Industrial Heavy-Duty Drive
Oil-bath lubricated worm gear mechanism ensuring continuous 24/7 industrial uptime.
Automated Metering Skid
Available as standalone pumps or skid-mounted packages with dosing tanks, agitators, calibration columns, and pulsation dampeners.
Electronic Solenoid
Compact, cost-effective dosing for flow rates up to 50 LPH. Ideal for water treatment & RO systems.
Motorized Diaphragm
Continuous industrial mechanical drive for capacities up to 1,500 LPH and pressures up to 10 Bar.
Plunger / Piston
High pressure chemical injection up to 100 Bar for boilers, oil & gas, and process reactors.
Hydraulic Diaphragm
Double diaphragm with rupture detection for toxic, hazardous and critical process lines.
Tailored Dosing Solutions for Every Process Demand
Whether requiring micro-volume chlorination in municipal drinking water, flocculant dosing in wastewater plants, or high-pressure chemical injection in refineries, Sando offers the exact pump technology matching your pressure and chemistry requirements.
Compare Pump Configurations →Available Dosing Pump Models
Select a model below to review full technical datasheets, dimensions, and flow curves.
Dosing
Dosing Metering Pumps
Dosing Metering Pumps are precision pumps designed to accurately inject chemicals and additives into fluid systems at controlled flow rates.
Industrial Applications & Typical Chemicals
Reliable performance across water treatment, chemical manufacturing, and heavy process industries.
Water & Wastewater
Chlorine, PAC, Alum, Polymers, pH neutralizing acids.
Chemical Processing
Catalysts, reactants, aggressive acids, solvent injection.
Boiler Feed Treatment
Oxygen scavengers, hydrazine, phosphate scale inhibitors.
Agriculture & Food
Fertigation, flavor additives, preservative dosing, CIP chemicals.
Frequently Asked Questions
Essential guidance for selecting and operating dosing pumps.
How do I select the right dosing pump capacity?
Select a pump where your normal operating flow falls between 30% and 85% of maximum rated capacity. Operating in this range delivers the highest metering linearity and diaphragm longevity.
What accessories are recommended for accurate dosing?
We recommend a backpressure valve (to prevent siphoning), a pressure relief valve (safety protection), a pulsation dampener (for smooth laminar flow), and a calibration cylinder for regular flow rate verification.
Can Sando dosing pumps handle viscous liquids like polymers?
Yes. For viscous polymers and flocculants up to 3,000 cP, we supply specialized spring-loaded check valves, oversized suction connections, and low-stroke-speed configurations.
Need Technical Sizing or a Fast Quotation?
Our application engineers will recommend the exact head material, stroke mechanism, and control interface for your chemical.