Product Description
Wilden P.025 Clamped Plastic Pump for Chemical Transfer
The Wilden P.025 Clamped Plastic Pump is a compact 6 mm (¼-inch) air-operated double-diaphragm pump designed for low-flow chemical and industrial applications.
Its rugged clamped construction allows rapid access to wetted components. Moreover, polypropylene or PVDF housings provide corrosion resistance for many compatible chemicals. Consequently, the pump suits applications requiring simple installation, dependable operation and frequent servicing.
P.025 AODD Pump Flow and Pressure
The compact AODD pump provides a maximum published flow of 18.1 lpm or 4.8 gpm with rubber, TPE or PTFE diaphragms.
In addition, maximum discharge pressure reaches 8.6 bar or 125 psi. However, actual output depends on the available compressed-air supply, liquid viscosity, discharge resistance and operating speed.
Key Features and Benefits
The Wilden Pro-Flo clamped plastic pump provides:
- 6 mm or ¼-inch liquid inlet and discharge
- 1/8-inch FNPT compressed-air inlet
- Maximum flow up to 18.1 lpm
- Maximum pressure of 8.6 bar
- Solids passage up to 0.4 mm
- NPT or BSPT threaded connections
- Polypropylene or PVDF wetted housings
- Rubber, TPE and PTFE diaphragm options
- Rotatable inlet and discharge
- Clamped construction for faster servicing
- Disassembly using a single tool
- Compact and lightweight configuration
- Lube-free Pro-Flo air system
- Simple installation and operation
Together, these features make the Wilden P.025 Clamped Plastic Pump suitable for compact chemical transfer, sampling, circulation and container-unloading systems.
Pro-Flo Air Distribution System
The P.025 chemical pump uses the Pro-Flo Air Distribution System, which has a simple pneumatic design with only three primary moving parts. Consequently, the pump supports dependable cycling and straightforward maintenance.
Moreover, its plastic centre section operates without external airline lubrication. Therefore, facilities can avoid routine lubricator servicing while reducing maintenance requirements and the risk of lubricant entering the exhaust air.
Polypropylene and PVDF Construction
The Wilden P.025 Clamped Plastic Pump is available with polypropylene or PVDF wetted housings.
Polypropylene suits many compatible acids, alkalis and general process chemicals. Alternatively, PVDF provides different chemical, temperature and abrasion resistance for selected aggressive liquids.
However, neither material is universally compatible. Therefore, users should verify the liquid concentration, operating temperature and complete chemical composition before selecting the pump.
Clamped Pump Maintenance
Clamp bands hold the manifolds, liquid chambers and centre section together. As a result, technicians can dismantle and reassemble the P.025 pump quickly using a single tool.
Moreover, the clamped configuration suits installations requiring regular inspection, cleaning or elastomer replacement. In contrast, bolted pumps generally prioritise enhanced containment for more hazardous chemical duties.
Therefore, users should select the construction style according to the fluid risk, maintenance frequency and operating environment.
Diaphragm and Elastomer Options
The compact plastic diaphragm pump supports:
- Rubber diaphragms
- TPE diaphragms
- PTFE diaphragms
Available elastomer materials may include:
- Buna-N
- FKM
- Neoprene
- PTFE
- Wil-Flex
Each material has different chemical, abrasion and temperature limits. Consequently, the diaphragm, valve balls, valve seats and seals must all match the transferred liquid and operating conditions.
Quarter-Inch Threaded Connections
The Wilden P.025 Clamped Plastic Pump uses ¼-inch NPT or BSPT threaded inlet and discharge connections.
In addition, the inlet and discharge manifolds can be rotated to improve piping flexibility. Therefore, the pump can fit compact equipment skids, laboratory systems and restricted installation spaces more easily.
However, users should confirm the required thread standard and compatible sealing material before ordering.
Solids-Handling Capability
The P.025 AODD pump can pass compatible particles measuring up to 0.4 mm or 1/64 inch.
Therefore, it is primarily intended for clean or lightly contaminated liquids rather than heavy slurries. Nevertheless, small particles may still affect valve and seat performance.
Consequently, the complete fluid condition should be reviewed during technical selection.
P.025 Suction Performance
Maximum published dry suction lift varies by diaphragm:
- Rubber: Up to 2.74 metres
- TPE: Up to 3.05 metres
- PTFE: Up to 2.44 metres
Meanwhile, maximum wet suction lift reaches approximately 9.45 metres with rubber and 8.84 metres with TPE or PTFE.
However, actual suction capability also depends on viscosity, inlet-pipe losses, installation elevation, atmospheric conditions and operating speed.
Wilden P.025 Applications in India
The Wilden P.025 Clamped Plastic Pump may support low-flow applications across India such as:
- Chemical sampling
- Laboratory fluid transfer
- Small dosing systems
- Pilot-production equipment
- Drum and container emptying
- Water-treatment chemicals
- Cleaning-chemical transfer
- Ink and coating circulation
- Equipment skids
- Small filtration systems
- Acid and alkali transfer
- General low-flow processes
For example, a polypropylene P.025 pump may suit compatible general chemicals. Alternatively, a PVDF configuration may handle selected aggressive liquids after a complete material-compatibility review.
Selecting the Correct Wilden P.025 Pump
Correct selection depends on:
- Required flow and discharge pressure
- Chemical name and concentration
- Operating temperature
- Liquid viscosity
- Particle size and concentration
- Polypropylene or PVDF housing
- Diaphragm and valve materials
- NPT or BSPT thread standard
- Suction conditions
- Available compressed-air pressure and volume
Therefore, users should configure the Wilden P.025 Clamped Plastic Pump around the complete hydraulic and chemical duty.
Otherwise, unsuitable materials, excessive suction lift or inadequate compressed-air capacity may reduce output, containment reliability and component life.
Why Choose the Wilden Pro-Flo P.025?
The Wilden Pro-Flo P.025 combines compact thermoplastic construction with quick clamped servicing and dependable lube-free pneumatic operation.
Moreover, its rotatable connections, strong wet suction capability and broad elastomer selection support varied low-flow duties. Consequently, this quarter-inch AODD pump provides a practical solution for facilities across India requiring economical and reliable chemical transfer.
Product Enquiries in India
The Wilden P.025 Clamped Plastic Pump is presented through Pumps Bharat for laboratories, pilot plants, water treatment, chemical sampling, cleaning systems, coating circulation, dosing skids and general low-flow industrial applications across India.
When submitting an enquiry, please provide the liquid, concentration, temperature, required flow, discharge pressure, particle content, thread standard and available compressed-air supply. With this information, the available housing, diaphragm and valve configurations can be evaluated against the application requirements.




















