VersaFlo
Grundfos VersaFlo® UP(S) wet rotor circulators are designed so that the water being pumped surrounds the rotor, cooling and lubricating the shaft and bearings.
Grundfos VersaFlo® UP(S) wet rotor circulators have many advantages over “dry runners”:
- They do not require a fan to cool the motor.
Fans are often a source of noise and vibrations that can resonate throughout a building via the pipe work. - They are virtually maintenance-free.
Dry rotor pumps, on the other hand, require frequent oiling and coupler replacements, and seals on dry rotor pumps are prone to leakage. VersaFloŽ UP(S) are seal-less, which eliminates worries about hot water leakage. They're also oil-less, because the pumped water lubricates the shaft and bearings, and they have no couplers to change. - They are available in cast iron construction for closed (heating and air conditioning) and bronze construction for open (domestic hot water) systems.
Both cast iron and bronze VersaFloŽ UP(S) constructions utilize laser-welded stainless steel impellers to achieve high pump efficiency.
The standard VersaFloŽ UP(S) motors are suitable for variable speed drive applications. The VersaFloŽ UPS pumps have a 2- or 3-speed switch, which increases the comfort level for the application. Most VersaFloŽ UP(S) pumps can replace other manufacturers' 3-piece dry runners without piping modification. Contact Grundfos for details.