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The Aro PW Series is a dimensional-interchange range of air-operated diaphragm pumps designed to fit the exact footprint and port positions of Wilden P4, M4, and T4 pumps, as well as Versa-Matic E4 models. Available in 1″ and 2″ aluminium configurations, the PW Series lets operators switch from inefficient or leaking competitor pumps without re-plumbing or re-mounting. The 1″ model delivers up to 227.1 LPM through NPT porting.
Every PW pump uses Aro’s SimulShift valve and Quick Dump valve technology to deliver stall-free, ice-free operation even at low air supply pressures. Bolted construction replaces the band clamps found on competitor designs, eliminating the leak paths that drive repair costs up over time. Diaphragm options include Santoprene and PTFE, with wider material choice including Nitrile, Hytrel, and Viton available from the manufacturer.
The PW Series is aimed squarely at operators looking to cut the ongoing cost of running Wilden or Versa-Matic pumps without disrupting their installation. Faster trip-over, less pulsation, and longer diaphragm life mean fewer unplanned stops and lower parts consumption over the pump’s working life. Supplied through TF Pumps with full technical support and genuine service kits for straightforward ongoing maintenance.
Got a question about Aro pumps? Find the answers to our most common questions here.
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The PW Series is engineered as a dimensional drop-in replacement for Wilden P4, M4, and T4 pumps plus Versa-Matic E4 pumps. The footprint, mounting points, and fluid inlet/outlet positions match those competitor pumps exactly, so you can swap to the Aro PW without modifying pipework or the pump stand.
Common reasons include stalling at low air pressure, icing during continuous operation, and leaks from band-clamp construction. The PW Series addresses all three with SimulShift valve technology, Quick Dump valves, and bolted construction that together improve efficiency and reduce ongoing repair costs.
The PW Series is offered in 1″ and 2″ configurations. The 1″ PW10 delivers up to 227.1 LPM. Both sizes use NPT porting and aluminium construction as standard, matching the typical Wilden and Versa-Matic models they replace.
Santoprene and PTFE are the standard options on TF Pumps. The wider Aro range extends to Nitrile, Hytrel, and Viton for specific chemical compatibility needs. Our team can help match the right diaphragm material to the fluid you are currently pumping with your existing Wilden or Versa-Matic.
Absolutely! If you’re unsure which pump is the best fit for your application, our team is here to help. You can pop up to our live chat for instant support, or simply send your requirements and pump details to sales@tfpumps.com. One of our experts will quickly recommend the most suitable pump for your needs.
