Available materials
- SS304
- SS316
- PP
- PVDF
- Application-selected elastomers
Petrox EngineeringPrecision chemical injection
Metering Pumps
Accurate, repeatable chemical injection configured around the fluid, flow, pressure and control requirement.
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Product overview
Selected around the complete duty.
Petrox Engineering supplies positive-displacement metering pumps for controlled chemical injection in continuous and batch processes. Selection begins with the required capacity, discharge pressure, chemical compatibility, suction conditions and turndown.
The available portfolio includes plunger and hydraulically actuated diaphragm configurations, with single- or multiple-head arrangements and manual or automated capacity control.
Flow rangeUp to 5,000 LPH
Pressure rangeUp to 100 bar
Control0-100% stroke adjustment
AccuracyUp to +/-1% at steady state
Typical applications
- Chemical injection
- pH correction
- Coagulant dosing
- Boiler-water treatment
- Process additive dosing
Industries served
- Water and wastewater
- Power
- Chemicals and petrochemicals
- Oil and gas
- Pharmaceuticals
- Pulp and paper
Standards & documentation
- API 675 configurations available
- Hydraulic Institute guidance
- Customer-approved QAP and inspection requirements
Selection considerations
Information that leads to a better selection.
Share these details with Petrox so the recommendation is based on the actual process rather than a generic catalogue match.
- 01Required minimum and maximum flow
- 02Normal and maximum discharge pressure
- 03Chemical concentration and temperature
- 04Viscosity, solids and vapour pressure
- 05Required turndown and control signal
- 06Available NPSH and suction arrangement
Technical resources
Review the Petrox-VK product brochure.
Download brochure
For a model-specific data sheet, share the fluid, flow, pressure and operating conditions.
Frequently asked questions
Practical answers before selection.
What is a metering pump?
A metering pump is a positive-displacement pump designed to deliver a controlled and repeatable flow of liquid, commonly for chemical injection.
How is capacity adjusted?
Capacity may be adjusted through stroke length, operating speed or an automated control arrangement, depending on the selected model.
Can Petrox select the wetted materials?
Yes. Petrox reviews the chemical, concentration, temperature and duty conditions before recommending wetted materials and seals.
Application support
Share the duty. We’ll help define the solution.
Send the fluid, required flow, suction conditions, discharge pressure and operating temperature for a focused technical response.