Diaphragm Pumps
Twice the head of a standard AODD pump - ~16 bar liquid pressure with a 2:1 pressure ratio and 160 m head - the reliable solution for long lines.
About the High Pressure Series
High pressure diaphragm pumps are a specially designed series that doubles the discharge head of a standard AODD pump from 80 m to 160 m. Manufactured with aluminum, cast iron, and AISI 316L stainless steel body options, these models are designed to overcome the challenges of long pipe lines, transfers to high buildings, and filter press feeding circuits in the chemical, petrochemical, paint-coating, wastewater, and mining sectors. Four sizes ranging from the PP 100 model with 1'' connection to the PP 300 model with 2.5'' diameter meet different flow rates and process requirements.
In a standard AODD pump, an air pressure of 8.4 bar produces a liquid pressure of approximately 8.4 bar with a 1:1 ratio, which corresponds to a head of roughly 80 m in clean water. The high-pressure series exceeds this limit with its 2:1 pressure ratio design: the surface area of both diaphragms acts on a single liquid chamber, doubling the air pressure. This translates into an air inlet pressure of 8.4 bar into a liquid outlet pressure of approx. 16 bar and a static head of approx. 160 m for clean water - at the cost of about half the flow rate compared to a standard pump. This difference is a decisive selection criterion for transfers to a building roof, silo top or overhead storage tank and for horizontal pipelines of more than 500 meters.
Wide operating temperature range between -18°C and +100°C and resistance to dry operation make these pumps reliable under demanding process conditions. In filter press feed applications, the cyclic variability of process pressure necessitates compatible operation with the pressure adaptation of diaphragm pumps; centrifugal pumps in this scenario either experience cavitation or cannot provide constant flow rate. High-pressure diaphragm pumps therefore rank among the essential equipment of the filter press cycle.
Technical Specifications
This series, which doubles the 80 m discharge height of a standard AODD pump, compensates for pressure losses at the end of the line in roof tank transfers of high-rise buildings, top storage silo feeding, and long horizontal piping lines.
As the system resistance increases in the filter press cycle, the pump flow rate automatically decreases while the pressure remains constant. This natural pressure-flow characteristic of diaphragm pumps provides a decisive advantage over centrifugal pumps in filter press circuits; the risk of excessive pressure and filter cake damage is eliminated.
It provides sufficient end-point pressure in 500+ meter pipe lines within chemical plants, in mining field surface-underground transfers, and in inter-floor chemical distribution lines in buildings. It eliminates the need for additional booster pumps and reduces facility costs.
Thanks to its -18°C operating capacity, it works safely in outdoor installations in cold climate conditions and in cooled chemical storage transfers. The metal body maintains its structural integrity at low temperatures.
Non-electric AODD principle and ATEX certified configuration provide safe installation in Zone 1–2 and Zone 21–22 explosive atmospheres of petrochemical and solvent paint facilities. Conductive metal housing prevents static electricity accumulation.
In long-distance line transfers, resistance to dry running in case of level drop or pump emptying prevents body and diaphragm damage. When the line is refilled, the pump comes into operation smoothly; no additional startup procedure is required.
Model Comparison
| Model | Connection | Maximum. Debut | Maximum Pressure | Height of Basma | Body |
|---|---|---|---|---|---|
| PP 100 | 1'' | 80 lpm | ~16 bar (2:1) | 160 m | AL / DD / SS |
| PP 150 | 1.5'' | 200 lpm | ~16 bar (2:1) | 160 m | AL / DD / SS |
| PP 200 | 2'' | 280 lpm | ~16 bar (2:1) | 160 m | AL / DD / SS |
| PP 300 | 2.5'' | 440 lpm | ~16 bar (2:1) | 160 m | AL / DD / SS |
Product Series
Frequently Asked Questions
Information Center
Suction and discharge stroke step by step, AODD/EODD comparison, material selection guide.
ReviewPP or PVDF body, 7 bar, 16–894 lpm. First choice if chemical resistance is a priority.
ReviewAL / Cast Iron / SS316, 8.4 bar, −18°C. For heavy industry and petrochemistry.
ReviewAISI 316L, CIP/SIP compatible. FDA approved solution for food, pharmaceutical and cosmetic processes.
Review380V electric drive, no compressor required. For 250-500 lpm constant flow requirement.
ReviewCheck the chemical resistance of the pump casing and diaphragm material as A/B/C/D from the table.
