R&D Flex Coupling and Split Flange (2024)

FAQs

What are the disadvantages of flexible couplings? ›

However, they are more complex and expensive than rigid couplings, larger and heavier due to the flexible element, less reliable and durable due to repeated flexing, and require more maintenance and inspection.

Initially, flexible couplings divide into two primary groups… metallic and elastomeric. Metallic types are all-metal designs that gain their flexibility from movement of loosely fitted parts that roll or slide against each other, or from bending of non-moving metallic parts.

The coupling is simple in structure, easy in manufacture, convenient in assembling and disassembling and changing the elastic element without moving the two halves of the coupling.

Failure to correct excessive misalignment

Even flexible couplings which are designed for use on misaligned shafts have their limits. A common point of failure is the under-estimation of the degree of misalignment, creating loads that surpass the coupling specifications.

The basic function of flexible coupling is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. Various materials are used to make flexible couplings like as follows: Brass. Aluminum.

The purpose of a flexible coupling is to transmit torque from one piece of rotating equipment to another, while accepting at the same time a small amount of misalignment. Flexible coupling misalignment is expressed, as an order of magnitude, in thousandths of an inch.

*Maximum test pressure 4.3 PSI (29.6 KPA) Fernco flexible couplings can be used to couple pipe when there is a break or an insertions is needed.

Diaphragm couplings are great all-rounder shaft couplings. They can accommodate parallel misalignment as well as high angular and axial misalignment. They also have high torque capabilities and can transmit torque at high speeds without the need for lubrication.

The disc coupling would be a good choice for a flexible coupling application involving very high torque or high speed. Disc couplings are highly flexible and can handle high rotational speeds and torque without significant loss of power transmission.

Why are split couplings used? ›

PVC coated split couplings are used to connect two pieces of conduit where the conduit can't be turned because of limited clearance between runs or a wall or other obstruction.

Rigid couplings are used to connect two shafts that are aligned with each other. Flexible couplings are used to connect two shafts that are not aligned with each other. Flexible couplings are good for when the shafts are a little bit off, while rigid couplings can't tolerate any misalignment.

Flexible couplings are utilized to transmit torque starting with one shaft then onto the next when the two shafts are marginally misaligned. Flexible couplings can oblige fluctuating degrees of misalignment up to 3° and some parallel misalignment.

Flange couplings are normally utilized in pressurized piping systems where two pipes or tubing closes need to meet up. The associating methods for flange couplings are generally solid due to either the weight of the material or the occasionally dangerous nature of materials went through numerous modern piping systems.

They're accepted by a number of codes — including the Uniform Plumbing Code and the International Plumbing Code — for both above- and below-grade use. I've installed many of these couplings above and below grade and have never encountered a problem.

Jaw couplings excel at absorbing axial displacement. They can operate at very high speeds. The drawbacks are that they can only tolerate 0.5 deg or so of angular misalignment and almost no parallel misalignment.

However, roller chains also have some drawbacks. They are noisy, especially at high speeds. They require regular lubrication to prevent rust and wear. They are more expensive than bush chains and may stretch over time.