UP(S) Series 200 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. Attention has been focused on using as few materials as possible, and the use of materials that might cause problems in connection with disposal have been omitted.

Features:

• UPS motors are two- or three-speed motors. UP motors are single-speed, dual-voltage motors.
• Stainless steel rotor can, bearing plate and rotor cladding.
• Stator housing in aluminum alloy.
• Cast iron or bronze pump housing.
• Stator with built-in thermal overload switch.

Motor

The motor, pos. 4, is a 2- or 4-pole, asynchronous squirrel-cage motor. As the motor is cooled by the pumped liquid, the noise level is very low.

Stator housing

Pressurized die-cast aluminum stator housing can be turned to change the position of the terminal box. The stator housing has eight drain holes to enable condensed water to escape. The vent hole under the terminal box allows the water to evaporate from the stator. The drain holes must point downwards. The permissible terminal box positions are shown in the drawing below. The positions apply to both vertical and horizontal mounting.

	Possible terminal box positions Note: The terminal box must only be turned to the above positions.
	The drawing on the left shows the standard box position. Standard terminal box position

The nameplate can be turned in steps of 45°. The positions of the terminal box and the nameplate are changed as described above. The stator wires are self-bonding. The wires and the terminal box are connected by a terminal plug. The stator incorporates a thermal overload switch for protection of the motor if the winding temperature becomes too high.

Rotor can

The rotor can, pos. 7, is made of drawn steel sheet and fitted with an inspection screw directly at the top. There is an O-ring seal between the inspection screw and the rotor can. For reasons of safety, the hole for the inspection screw will deflect a possible jet of liquid if the inspection screw is removed. The outer radial bearing is fitted into the top of the rotor can.

Shaft with rotor

The shaft, pos. 8, is made of stainless steel and equipped with two tungsten carbide bearings. To further improve the internal circulation of the pumped liquid in the rotor can, the shaft of 4-pole motors is fitted with a small rotor impeller. The rotor is made of soft-annealed iron lamination and provided with copper or brass bars. The short-circuit rings are made of copper. The rotor is encapsulated in a thin stainless steel cladding and dynamically balanced. The thrust bearing is secured to the shaft in a spherically flexible suspension.

Bearing plate

The bearing plate, pos. 10, is made of stainless steel. The inner radial bearing is pressed into the bearing plate, ground and honed. The relatively large bearing plate surface means that motor heat is effectively carried away by the pumped liquid.

Impeller

The stainless steel impeller, pos. 13, is of the radial type with curved blades. It is secured to the shaft by a split cone and nut (left-hand thread).

Pump housing

The pump housing, pos. 16, is available in cast iron or bronze. All pump housings are flanged for the individual markets. See also Product range concerning flanges and Product numbers concerning port-to-port lengths. The pump housing is of the in-line type. A stainless steel/PTFE neck ring minimizes the recirculation and improves pump efficiency. The bottom of the housing has threaded holes for fastening to a base plate.