IRRIGATION
20Pages

MEASURING AND MONITORING IRRIGATION WATER COMBINING THE TRADITIONAL ROBUST DESIGN

Irrigation is the most important use of water. Almost 70% of the world's freshwater withdrawals go towards irrigation uses. Irrigated agriculture represents 16% of the total cultivated land but contributes 30-40% of the total agricultural products produced worldwide. It is estimated that in the next thirty years, 80% of the additional food available will come from irrigated crop fields. On the one side, irrigation plays a growing role in the availability of food; on the other, it is the major cause of water consumption. For instance, the amount of water used for irrigating a one-hectare...

Maddalena gained the know-how of SIGMA S.p.A over a decade ago. Maddalena, a world leader in the measurement of water, has become a leading company in the field of measurement, monitoring and regulation of irrigation water. Irrigation water often contains impurities which may not only affect the water measurement but also operation and regulation. Maddalena instruments are especially designed for the measurement, monitoring and regulation of irrigation water and provide accurate and reliable control of water resources. From self-clearing water meters to automated water supply units, from...

Water supply unit Automated water meter/flow limiter Water supply unit Water meter/flow limiter Self-clearing type water meter Tangential water meter Modulating flow limiter Hydrant gate valve for irrigation water Hydraulic irrigation valve A whole range of accessories for batching and remote reading systems

Automated water supply unit - water meter/flow limiter for irrigation purposes. HYDROMIL combines ease of use with flexibility and sophisticated management. Main components: • HYDROBLOC water supply unit. It consists of: • cast iron body; • 3-paddle wheel, self-clearing Woltmann water meter with removable register (Woltmann tangential type meter available upon request); • hydraulic membrane valve; • modulating ring flow limiter (optional); • outlet available with flanged, threaded or with spherical connection. • MIL-MEMORY electronic control unit; battery operated; designed for the supply,...

Water supply unit - water meter/flow limiter for irrigation purposes. WMVI supply units consist of: cast iron body, 3-paddle wheel, self-clearing Woltmann meter designed for vertical installation and with removable register (tangential type Woltmann meter available upon request); modulating ring flow limiter. The outlet is available with threaded, flanged or with spherical connection. The hydrodinamic design provides a free water passage resulting in low head loss and the ability to measure murky water carrying debris or filaments. WMVI supply units are especially designed to monitor water...

Axial 3-paddle wheel, self-clearing type Woltmann meter. Features include: mechanical drive, interchangeable sealed register and permanently Readability is ensured by the tempered mineral glass lens. Its flat and smooth surface, unlike plastic lenses, is scratch-resistant and does not turn opaque. The dial, the numbered drums, the inscriptions and the serial number are in a dry compartment which has no contact with water for continued readability. WMAPE meters are tamper-proof and are unaffected by external magnetic interference. WMAPE meters are recommended for irrigation purposes. The...

Tangential, magnetic drive water meter recommended for irrigation purposes. WT meters feature an interchangeable sealed register, a condensation-proof, 360-degree rotatable clockwork and metal lockable lid. The registration mechanism has no contact with the water The paddle wheel is located at the top of the water passage, therefore WT meters are recommended for irrigation, wastewater and water from treatment plants where debris may be encountered. WT meters can be installed in any position. Maximum measuring accuracy: +/- 5%. WT meters are available in sizes from 50 mm a 400 mm. Features...

LG modulating flow limiters consist of one or several deformable elastomer washers housed in a metal housing. Cast iron body. The wide water passage and the absence of mechanichal moving parts eliminate the risk of clogging. LG flow limiters are recommended for use with murky water carrying sand, debris or filaments. They are also ideal for use with fertilized, salty or waste water. LG flow limiters are available with cast iron body (up to 200 mm) or electro-welded steel body (larger sizes), flange or interflange design.

S58 self-sealing gate valves combine the typical features of a gate valve (minimum head loss, free passage, slow opening and closing) with the features of a valve (continuous modulation, sealing even with abrasive, calcareous liquids or with suspended particles). A shutter with parallel faces ensures no risk of deformation or clogging. Perfect sealing on the shutter and on the stem. A free passage and a slow opening and closing ensure no risk of water hammer. S58 self-sealing gate valves are recommended for irrigation purposes as well as for use in industrial and fire extinguishing systems....

HVM automatic control diaphragm valves are made up of a reduced number of components and have no moving parts. The elastic diaphragm adheres to the valve seat providing a tight seal. The valve can be operated manually or automatically, idraulically or electrically, locally o remotely. Introducing and exhausting water are slow and gradual in order to avoid water HWV valves are operated by introducing a flowing media which acts on the diaphragm and closes the valve. When the flowing media is discharged to atmosphere, the valve opens. HVM valves can be used as shut off-valves and are suitable...

MECHANICAL ACCESSORIES

MADDALENA'S PRODUCT RANGE Measuring and monitoring irrigation water combining the traditional robust design with the newest technologies Accurate, compact and functional water meters for easy and error free reading THERMAL ENERGY Constant monitoring of consumption to save all year round BULK METERS Bulk meters mean large numbers Versatile instruments to simplify industrial activities Special purpose instruments for accurate measurement of liquids Systems designed for monitoring, remote control, remote reading and metrological verification