Special features/product 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

Design type

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

Application

• Fully automatic water supply and pressure boosting in residential, commercial and public buildings, hotels, hospitals, department stores and for industrial systems.
• 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
• Galvanized base frame with height-adjustable vibration damper for insulation against structure-borne noise
• Gear-operated shut-off ball cock/annular shut-off valve on every pump, on the suction and pressure side
• Non-return valve, pressure side
• Diaphragm pressure vessel 8 l, PN16, 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, connection-ready 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
• Ambient temperature max. 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"
• Nominal speed 2750 rpm
• Protection class IP 44
• Fuse protection on mains side [AC 3] according to motor power and EVU regulations
• Approved fluids (other fluids on request):Note on fluids: Approved fluids are generally water mixtures which do not chemically or mechanically attack the materials used and do not contain either abrasive or fibrous matter
• Drinking water and domestic hot water
• Cooling water
• Fire water

Materials

• Impellers 1.4301 stainless steel
• Stage chambers 1.4301 stainless steel
• Pump housing 1.4301 stainless steel
• Shaft 1.4122 stainless steel
• Seal EPDM (EP 851)
• Lower housing section stainless steel 1.4301
• Pressure shroud 1.4301 stainless steel
• Bearing carbon, synthetic resin impregnated
• Pump base 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 shut-off ball cock, 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