Your advantages

• Easy-to-use system in accordance with all requirements of DIN 1988
• 2 – 6 vertical MVIS series full stainless steel high-pressure multistage centrifugal pumps switched in parallel
• Virtually noiseless system thanks to glandless stainless steel high-pressure centrifugal pump of the MVIS series
• Up to 20 dB[A] quieter than conventional systems with comparable hydraulic output

Construction

Pressure-boosting system with 2 to 6 non self-priming stainless steel high-pressure multistage centrifugal pumps connected in parallel with glandless motor

Application

• Fully automatic water supply and pressure boosting in inlet mode, either from the public water supply network or from a tank, for domestic, commercial, industrial and municipal applications (e.g. residential, office, administration buildings, hotels, hospitals, trades, industry, water supply companies).
• Pumping of drinking water and process water, cooling water, fire water (apart from fire-extinguishing systems in accordance with DIN 14462 and with the approval of the local fire safety authorities) or other types of industrial water that do not attack the materials either chemically or mechanically and do not contain abrasive or long-fibre constituents.

Equipment/function

• 2-6 pumps per system
• Automatic pump control via CC Controller
• Components that come in contact with fluid are corrosion-resistant
• Galvanised base frame with height-adjustable vibration absorber for insulation against structure-borne noise
• Gear-operated ball valve/annular shut-off valve on every pump, on the suction and pressure side
• Non-return valve, pressure side
• Diaphragm pressure vessel 8 l, PN 16, on the pressure side
• Pressure sensor, on the discharge side
• Optional pressure gauge (suction side)
• Pressure gauge (discharge side)
• Optional low-water cut-out switchgear

Scope of delivery

• factory-mounted, ready for connection pressure-boosting system checked for functionality and impermeability
• Packaging
• Installation and operating instructions

Type key

Technical data

• Mains connection 3~230/400 V ± 10%, 50 Hz (other versions on request)
• Max. fluid temperature 50 °C
• Max. ambient temperature of 40 °C
• Operating pressure 16 bar
• Inlet pressure 6 bar
• Nominal connection diameters on discharge side Rp 2" - Rp 3"
• Nominal connection diameters on inlet side Rp 2" - Rp 3"
• Rated speed 2750 rpm
• Protection class IP44
• Fuse protection on mains side [AC 3] according to motor power and EVU regulations
• Approved fluids (other fluids on request): Note regarding fluids: Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents.
• Drinking water and hot water
• Cooling water
• Firefighting water

Materials

• Impellers of stainless steel 1.4301
• Stage chambers made of 1.4301 stainless steel
• Pump housing made of 1.4301 stainless steel
• Shaft 1.4122 stainless steel
• Gasket EPDM (EP 851)
• Housing bottom made of 1.4301 stainless steel
• Pressure shroud made of 1.4301 stainless steel
• Bearing made of carbon, synthetic resin-impregnated
• Pump support foot made of EN-GJL-250
• Pipework made of 1.4571 stainless steel

Description/construction

• Base frame: galvanised and provided with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
• Pipework: complete pipework made of stainless steel, suitable for the connection of all piping materials used in building services; the pipework is dimensioned according to the overall hydraulic performance of the pressure boosting system
• Pumps: 2 to 6 parallel-switched pumps from the MVIS 2.., MVIS 4.. and MVIS 8.. series are used; all pump components in contact with fluid are made of stainless steel
• Valves: each pump is fitted on the suction and pressure side with a shut-off valve with DVGW approval mark and a pressure-side DVGW-approved non-return valve
• Diaphragm pressure vessel: 8 l/PN 16 located on the discharge side with a butyl rubber diaphragm, completely safe in accordance with food safety laws; for testing and inspection purposes, with ball valve, with drain and throughflow fitting according to DIN 4807
• Pressure sensor: 4 to 20 mA, located on the discharge side for activating the central Comfort Controller
• Pressure display: suction- and discharge-side pressure gauge (ø 63 mm); additional digital display of discharge pressure in the touchscreen of the Comfort Controller
• Switchgear/controller: the system is equipped with a Comfort Controller CC as standard; on COR systems, it is fitted with a frequency converter for speed control of the base-load pump