Available materials
- SS304
- SS316
- Alloy options on request
- PTFE diaphragm options
- Application-selected valve materials
Petrox EngineeringSealed liquid end for critical fluids
Hydraulically Actuated Diaphragm Pumps
A hermetically sealed liquid end for demanding fluids where containment and diaphragm reliability are critical.
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Tell us what the pump needs to do.
Share your duty conditions for a suitable pump selection and quotation. Leave unknown details blank; our team can help.
Product overview
Selected around the complete duty.
Hydraulically actuated diaphragm pumps isolate the process liquid from the drive mechanism with a hydraulically balanced diaphragm. They are suited to hazardous, toxic, costly and difficult fluids where external leakage must be minimized.
VK configurations include diaphragm-activated hydraulic replenishment, automatic air bleeding, built-in relief protection and unrestricted liquid passages designed to support stable metering.
FlowSelected to process duty
PressureSelected to rated duty
Liquid endHermetically sealed
ProtectionBuilt-in hydraulic relief
Typical applications
- Hazardous chemical dosing
- Toxic fluid injection
- High-value chemical feed
- Slurry service
- High-pressure process dosing
Industries served
- Oil and gas
- Petrochemicals
- Power
- Fertilizers
- Chemicals
- Nuclear and research
Standards & documentation
- API 675 configurations available
- Hydraulic Institute guidance
- Project-specific 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.
- 01Containment requirement
- 02Fluid solids and viscosity
- 03Suction pressure and NPSH
- 04Maximum system pressure
- 05Diaphragm monitoring requirement
- 06Relief and back-pressure protection
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.
Why use a hydraulic diaphragm pump?
It provides a sealed process liquid end and hydraulically balances the diaphragm, making it suitable for critical containment duties.
Can it handle slurry?
Unrestricted liquid passages can improve slurry capability, but particle size, concentration and settling behaviour must be reviewed.
How is the diaphragm protected?
The hydraulic system includes replenishment and built-in relief features selected to maintain the correct hydraulic volume and protect the drive.
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.