Bathers’ paradise in the desert sands
“Basically it’s like a fairytale from the 1001 Nights,” says Bernd Thören of ROWO GmbH in Krefeld, describing impressions from his first visit to Al Ain, the United Arab Emirates’ oasis city near the country’s mountainous border with Oman. He probably would never have come to know the desert town if the President of the United Arab Emirates had not had the idea of building the Green Mubazzarah near to the Rub al-Khali desert. And it is indeed a bizarre contradiction when, in the midst of the desert landscape, the outline of a bathing centre suddenly appears.
16 bronze pumps ordered
The country, which has become wealthy through its large oil deposits, has with great technical and financial investment been able to erect a number of green, blossoming man-made leisure oases along the coast of the Arabian peninsula. The pleasure of swimming and bathing is important here. And at the Green Mubazzarah, enormous quantities of water have to be continuously circulated and sucked in for filtering. The centre is made up of four separate swimming halls: two screened-off halls for the women, and two halls for men. Mixed bathing is forbidden in the desert state. 16 pumps are used to circulate the water. When choosing the pumps, Bernd Thören of the ROWO Team opted for units made by Herborner Pumpenfabrik: “I have known the company and its pumps since 1979. Their perfect workmanship, technical expertise and of course their almost legendary ‘Herborner Durability’ were once again the factors that led us to choose Herborner Pumpenfabrik for this project in the Emirates.”
In the end they chose the new UNIBAD 72 which has recently been added to the range of small swimming pool pumps. There was a special feature: the self-priming pump had to be made completely from bronze, since the swimming baths are all filled with salt water. This did not present a problem to the market-leader in swimming pool pumps, since they have their own foundry which can respond with the necessary flexibility to all material requests.
Managing Director Wolfram Kuhn says of this, “we produce tailor-made solutions, not just pumps from a brochure, and this philosophy has once again helped the customer in this particular situation”.
Compact pump developed for multiple uses
This bathing water circulation pump, with an integrated pre-filter, can circulate and filter bathing water, fresh water, thermal base water, sea water, industrial water and other liquids contaminated with coarse substances. It is ideal not only for water leisure centres and public swimming pools, but also for ice sports halls and leisure parks. The single-stage rotary pump with a block-type construction is also designed for use in industrial settings and in heat recovery systems. One of its major advantages alongside its durability is its easy-to-install, easy-to-service compact design which can circulate large amounts while taking up very little space.
Once filled for the first time, the pump is self-priming. The filter basket can be removed easily without tools, an additional benefit of the bathing water pump with integrated hair and fibre filters. The shaft is sealed by a maintenance-free bearing ring seal which is specially adapted to the medium involved. The pump is very quiet, producing much less noise than the permissible acoustic limit stipulated for electrical motors. If combined with a water-cooled “Model C” motor, noise output can be reduced to an absolute minimum. This option is especially attractive to hotels and health-spas so that their clients can relax in absolute peace and quiet. It also saves energy, since the heat generated by the motor is used to heat the bathing water.
The ETS X4.2 protection system
The company’s wide range of products includes their own electronic run-dry protection system, the ETS X4.2. It employs a sensor to prevent the pump from running dry, which would destroy the bearing ring seal, and it ensures that the pump keeps on working. The sensor measures the fill level near the bearing ring seal, and ensures that the sliding surfaces are submerged. Not until the correct level is achieved does the electronic system start the pump motor. If the seal becomes no longer submerged while running, the sensor detects this and electronically interrupts the motor’s operation. If air collects in the area around the bearing ring seal, it is released through a solenoid valve. Manual de-aeration is not necessary. The solenoid valve is protected against blockages by a special sieve.
Information about the company:
Herborner Pumpenfabrik has been pioneering the pump industry since 1874. Quality, reliability and a performance philosophy oriented around the customer – all of these things are characteristic of the traditional Hessen-based firm. Herborner Pumpenfabrik has 150 employees at two sites who develop and manufacture long-lasting specialist pumps for swimming pools, drainage and sewage, and shipping. Their comprehensive range is also complemented by pumps for machinery construction, for water processing, and for installation and maintenance in municipal supply and waste removal.
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J.H. Hoffmann GmbH & Co. KG
Tel.: +49 (0)2772 933 103
Fax: +49 (0)2772 933 100
Sascha Korupp, Technical Director
Tel. ext.: +49 (0)2772 933 170
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Welke Consulting Gruppe
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