What is a closed coupled pump?

Close-coupled pumps are characterised by a common motor and pump shaft or by their motor shaft and pump shaft being rigidly connected in a pump casing. The pump casing is bolted to the drive flange rather than being installed on pump feet.

What is the difference between a close coupled and a long coupled pump?

Whilst close coupled pumps benefit from a compact, cost effective design, they are less preferable for heavy duty, high power, continuous use as there is more strain put on the common bearings and the size of the motor is usually limited. For heavier duty applications, long coupled pumps are more suited.

What is closed coupling?

: a coupling of two electrical circuits such that any change of current in one produces a relatively large change in the other.

Does a close coupled pump have bearings?

Close-coupled pumps do not need couplings, making this option less expensive than its frame mounted counterpart. With no bearings in this pump design, the motor bearings must handle the axial and radial loads of the application. This limits the size and power of the motor used.

What is a pump coupling?

Pump couplings connect the pump shaft and motor shaft together in order for the motor to efficiently transmit power to the pump. Like everything else on the pump, selecting the right coupling for the application can have positive or negative impact on the pump’s lifetime performance.

What is motor coupling?

Coupling is a component used to connect a drive shaft and a driven part, for example, a motor shaft and a ball screw for the purpose of transmitting the torque. As a result, this coupling flexibility can prevent uneven wear, vibration, and other mechanical troubles due to misalignment.

What is the difference between a close coupled toilet and a back to wall toilet?

With a close coupled toilet, the pan and cistern all come as one complete unit. The flush on a close coupled toilet will be located either on top or to the side of the cistern, whereas with a back to wall toilet, the flush will be wall or unit mounted.

What is an overhung pump?

Overhung Impeller Type: The impeller is mounted on the end of a shaft which is “overhung” from its bearing supports. – Close Coupled pumps where the impeller is mounted directly on the motor shaft – Separately coupled or frame mounted where the impeller is mounted on a separate pump shaft supported by its own bearings.

What’s the difference between close coupled and separately coupled pumps?

–Close Coupled pumps where the impeller is mounted directly on the motor shaft –Separately coupled or frame mounted where the impeller is mounted on a separate pump shaft supported by its own bearings. • Impeller Between Bearings Type: The impeller is mounted on a shaft with the bearings at both ends.

Where is the impeller located on a close coupled pump?

Close-coupled pumps have a single shaft (instead of two connected shafts) that extends from the motor to the pump body through an opening in the cover plate. The mechanical seal, shaft sleeve, and impeller are all mounted on the motor shaft.

What kind of coupling does a centrifugal pump use?

Centrifugal HVAC and plumbing pumps may be direct closed coupled or flexibly coupled. Pump couplings serve an important purpose, the greatest of which is to connect the pump to the motor for the efficient transfer of power.

How big of a motor does a close coupled pump need?

Close-coupled pumps can be as large as 60 or 75 HP, but no larger. Motor manufacturers offer motors designed for this type of pump only up to 60 or 75 HP, and a larger motor would be an expensive, custom-design with a very long lead time.