CRANE CHEMPHARMA & ENERGY · PUMPS
DEPA Air Operated Diaphragm Pumps (AODD) – Crane ChemPharma
DEPA air operated diaphragm pumps from Crane - ideal for abrasive, viscous & shear-sensitive media. Supplied by PC Engineering India.
Overview
DEPA air operated diaphragm pumps (AODD pumps) from Crane ChemPharma are positive displacement pumps designed for demanding industrial applications. With over 30 years of proven performance, these pumps are engineered for reliable, efficient handling of challenging media including abrasive, viscous, and shear-sensitive fluids.
The pumps operate using compressed air to alternately pressurize two back-to-back pump chambers separated by flexible diaphragms. This oscillating action enables gentle product conveyance without dynamic seals, making DEPA pumps suitable for media containing entrained solids and for processes requiring dry self-priming capability.
DEPA pumps feature a modular construction that allows quick adaptation to different applications by changing diaphragms, valve seats, and valve balls. All products are manufactured under DIN EN ISO 29001 quality assurance standards.
Key Features
- Dry self-priming with suction lift up to 9 m WC (with filled suction pipe)
- Tolerant of dry running – no damage from running without media
- No dynamic or pressure-loaded seals – reduced maintenance
- Handles abrasive, viscous, and shear-sensitive media
- Suitable for fluids with entrained solids
- Infinite regulation of pumping capacity via air supply
- Can run against closed discharge valves
- Submersible designs available
- ATEX-compliant options for explosive/hazardous areas
- Oil-free compressed air control system
- Portable/mobile or fixed installation options
Specifications
| Parameter | Options/Values |
|---|---|
| Housing Materials | Aluminium (FA), Cast Iron (CA/CX), Stainless Steel 316L (SA/SX/SF/SU/UE), Stainless Steel 304 (SL), Polypropylene (PP/PL/PM), PVDF (PV), PTFE (PT/TL) |
| Centre Block Materials | Aluminium, Bronze, Nickel-coated Aluminium, Stainless Steel (option), Polypropylene, Electrically Conductive Polypropylene |
| Diaphragm Materials | NRS (B), EPDM (E/G/U), FKM (F), Nitrile (N), PTFE (P/T), Hytrel (H), NRR (L) |
| Valve Ball Materials | NRS, EPDM, FKM, Nitrile, Stainless Steel, PTFE, Steel-core variants |
| Valve Seat Materials | NRS, EPDM, FKM, Nitrile, Stainless Steel, PTFE |
| Max Suction Lift | Up to 9 m WC |
| Max Inlet Pressure (Suction Side) | 0.7 bar |
| Quality Standard | DIN EN ISO 29001 |
| Installation Types | Fixed, portable, submersible, drum-mounted (DF 25) |
Applications
DEPA air operated diaphragm pumps are used across a wide range of industries and applications:
- Chemical processing – acids, alkalis, solvents, slurries - Paints and coatings – pigments, resins, viscous coatings - Food and beverage – syrups, pastes, food-grade fluids - Pharmaceutical and cosmetics – sanitary pumping requirements - Wastewater treatment – sludge, effluent transfer - Mining and minerals – abrasive slurries, tailings - Pulp and paper – coatings, adhesives, waste streams - Ceramics and clay – slip, glazes, abrasive suspensions - Drum and container unloading – using DF 25 drum pump configuration
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