REFRIGERATION PUMP SERIES CNF

Structural characteristics Series CNF refrigeration pump is one with a single stage and in a high-pressure Internal circulation mode. Part of medium is diverted from the high-pressure Zone at the impeller outlet, and capacity through a filter net into The shaft central hole, where it is further...

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Structural characteristics

Series CNF refrigeration pump is one with a single stage and in a high-pressure

Internal circulation mode. Part of medium is diverted from the high-pressure

Zone at the impeller outlet, and capacity through a filter net into

The shaft central hole, where it is further pressurized by the auxiliary impeller

Before coming into the rotor chamber of the canned motor, and finally, it

Returns to the high-pressure zone at the impeller outlet. This kind of high-pressure

Internal circulation mode ensures sufficiently the pressure in the rotor

Chamber of the canned motor to keep media from vaporizing in the pump

(See Figure 2). That diversion also has a function of cooling the canned motor,

Lubricating the slide bearing.

In traditional refrigeration canned motor pump (see Figure 3), the vaporizing

Point is the most likely to get very close to saturation vapor pressure or even

Go beyond the pressure line sometimes, resulting in a reduced pressure in

The motor chamber leading to a vaporization phenomenon. The slide bearing

Becomes worn easily due to generation of dry friction. Furthermore, gas

Exhaust piping should be provided during field installation.

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