{"id":1585779,"date":"2025-01-16T11:49:14","date_gmt":"2025-01-16T09:49:14","guid":{"rendered":"https:\/\/artem.steiner.com.ua\/?post_type=product&p=1585779"},"modified":"2026-09-30T10:58:56","modified_gmt":"2026-09-30T07:58:56","slug":"hidrostal-axial-diffuser-pumps","status":"publish","type":"product","link":"https:\/\/steiner.com.ua\/en\/catalog\/hidrostal-axial-diffuser-pumps\/","title":{"rendered":"Hidrostal \u2013 axial pump \u2013 column and vertical turbine pump for high water flow rates (Axial Diffuser)"},"content":{"rendered":"

The Hidrostal axial-flow pump is an axial-flow pump designed for pumping large volumes of water at a low head. The Axial Diffuser Pumps group comprises two designs: the axial column pump and the vertical turbine pump. The manufacturer is Hidrostal Holding AG, Neunkirch, Switzerland. General information about the technology and the company can be found on the brand page Hidrostal<\/a>.<\/p>\n

What is a Hidrostal axial pump and how is it designed?<\/h2>\n

The axial column pump uses the same screw-centrifugal impeller as Hidrostal volute pumps, but the volute casing is replaced by an axial-discharge casing. As a result, the pump is installed in a vertical pipe or concrete chamber rather than on a foundation with a side discharge pipe.<\/p>\n

The unit is assembled on the basis of the standard range of Hidrostal submersible motors. The motor is cooled by the pumped liquid.<\/p>\n

The head characteristic is steep and stable, and the power consumption curve is flat across the entire operating range. Because of this, the motor does not overload when the operating mode changes.<\/p>\n

The single-channel screw-centrifugal impeller provides a large free passage, meaning the hydraulics are largely resistant to clogging. This same passage makes the pump suitable for fish-friendly pumping.<\/p>\n

What are the technical specifications of the Hidrostal axial pump?<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Capacity<\/td>\n6\u20131500 l\/s (21.6\u20135400 m\u00b3\/h)<\/td>\n<\/tr>\n
Pressure<\/td>\nup to 20 m<\/td>\n<\/tr>\n
Diameter of the tube chamber<\/td>\n400\u20131500 mm (16\u201360 inches)<\/td>\n<\/tr>\n
Shaft power<\/td>\n1.5\u2013250 kW<\/td>\n<\/tr>\n
Shaft speed<\/td>\n375\u20131500 rpm<\/td>\n<\/tr>\n
Power supply<\/td>\n50 Hz, 60 Hz or frequency inverter<\/td>\n<\/tr>\n
Hydraulic efficiency<\/td>\nover 82%<\/td>\n<\/tr>\n
Shaft seal<\/td>\ndual mechanical seal, tandem, with barrier fluid<\/td>\n<\/tr>\n
Impeller<\/td>\nmixed-flow, axial direction of flow<\/td>\n<\/tr>\n
Pump materials<\/td>\ncast iron, spheroidal graphite cast iron, Hidrohard, stainless steel, duplex steel<\/td>\n<\/tr>\n
Engine materials<\/td>\ncast iron, stainless steel, duplex steel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

The introductory description on the manufacturer's website gives a narrower range: a head of up to 15 m and a flow rate of 30\u20131400 l\/s. The specification and brochure provide 6\u20131500 l\/s and up to 20 m. The operating point for a specific project is confirmed by the manufacturer during selection.<\/p>\n

For duties exceeding 1500 l\/s, the Hidrostal Group offers submersible axial flow pumps from its sister company, Bedford Pumps, with capacities up to 10,000 l\/s (36,000 m\u00b3\/h).<\/p>\n

How does a vertical turbine pump differ from a column pump?<\/h2>\n

A vertical turbine pump is a mixed-flow centrifugal pump. The manufacturer does not describe it as a screw-centrifugal pump: this is a different hydraulic design, intended for a different range.<\/p>\n

It is used when the water level is below the operating limits of a volute centrifugal pump \u2014 for example, from a borehole or a deep reservoir. The vertical layout takes up little floor space.<\/p>\n

Priming issues do not arise: the impellers are submerged in the liquid. The first impeller can be lowered further by increasing the sump depth, thereby providing the required NPSH margin.<\/p>\n

The multi-stage design yields a higher efficiency at conditions with a high head and lower flow rate. The modular construction allows the pump to be adapted to a specific application. Numerical ranges of flow rate and head for this execution are not provided by the manufacturer on the product page \u2014 they are determined during selection.<\/p>\n

Where is the Hidrostal axial pump used?<\/h2>\n

The manufacturer lists seven typical tasks for an axial column pump:<\/p>\n