Brochure

13
GENERAL DATA GRUNDFOS SERIES UP
Applications
The Grundfos circulator pumps, Series UP, are
specifically designed for heating systems. The
pumps are also suitable for circulation of hot
domestic water and for circulation of liquid in
cooling and air-conditioning systems.
Heating systems
Common Uses:
Boiler/ Hydronic Heating
Ground Source Heat Pumps
Radiant Floor Heating
Hydronic & Fan Coil Heating
Solar Heating
Heat Recovery / Heat Pumps
Pump types with cast iron housing are generally
used for these applications, considered to be
closed systems pumping water or water/glycol
mixtures. However, when water conditions exist that
are not compatible with cast iron, bronze, brass, or
stainless steel is recommended.
Optional variable speed and mixing reset controls
are available to customize heat output vs heat
demand for increased comfort.
Domestic Hot Water Systems
Common Uses:
Solar Water Heating
Hot Water Recirculation
Domestic Hot Water Heating
Pump types with bronze, brass or SS housing are
used for these applications, considered to be open
systems pumping potable water.
Optional timer and thermostat controls are
available to limit pump operation to periods when
hot water is required and to save energy.
Cooling Systems
Common Uses:
Chilled Water Pumping
Pump types UP25, 26, 43, 50 and pump housings
compatible with the pumped fluids are
recommended for chilled water due to their motor
construction, which is suitable for 32°F (0°C) water.
Construction
The UP pumps are of the canned rotor type, i.e. pump
and motor form an integral unit without shaft seal and
with only two gaskets for sealing. The bearings are
lubricated by the pumped liquid.
The pumps are characterized by:
• Ceramic shaft and radial bearings.
• Carbon thrust bearing.
• Stainless steel rotor can and bearing plate.
• Impeller in corrosion-resistant material.
• Pump housing in cast iron, bronze or stainless steel.
Materials of Construction
Description
(UP Closed Systems)
Material
Inlet Cone, Bearing Plate, Bearing
Retainers, Rotor Can, Rotor Cladding,
Shaft Retainer
304 Stainless Steel
Stator Housing Aluminum
Shaft, Upper and Lower Radial Bearings Aluminum Oxide Ceramic
Thrust Bearing Metal Impregnated Carbon
Check Valve
ACETAL with 302 Stainless Steel Spring
and Nitrile Rubber Seats
Pump Housing (Volute) Cast Iron
O’Ring & Gaskets EP (Ethylene Propylene Rubber)
Impeller
PES Composite (30% Glass Filled), PP
(Polypropylene) 30% Glass filled on
models UP15-100F & UP26-120U only
Terminal Box Noryl®
Description
(UP Open Systems)
Material
Inlet Cone, Bearing Plate, Bearing
Retainers, Rotor Can, Rotor Cladding,
Shaft Retainer
304 Stainless Steel
Volute Retainer (SU & SF Models) &
Stator Housing
Aluminum
Shaft, Upper and Lower Radial Bearings Aluminum Oxide Ceramic
Thrust Bearing Metal Impregnated Carbon
Pump Housing (Volute) Silicon Bronze C875 or Stainless Steel
O’Ring & Gaskets EP (Ethylene Propylene Rubber)
Impeller PES Composite (30% Glass Filled)
Terminal Box Noryl®
Description
(BUC5 & BUC7)
Material
Inlet Cone, Bearing Plate, Bearing
Retainers, Rotor Can, Rotor Cladding,
Shaft Retainer, Check Valve Spring
Stainless Steel
Stator Housing Aluminum
Shaft, Upper and Lower Radial Bearings Aluminum Oxide Ceramic
Thrust Bearing Lead Free Bronze (Alloy C875)
Pump Housing (Volute) Silicon Bronze
Tail Piece and Union Nut Brass (UNS C36000)
O’Ring & Gaskets EP (Ethylene Propylene Rubber)
Impeller PES Composite (30% Glass Filled)
Terminal Box Noryl®
Check Valve Housing, Valve & Torpedo POM (polyoxymethylene)
Union Gasket Non Asbestos Fiber
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