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PCE Pacific News

The Dangers of Non-OEM Valve Parts

September 21, 2020

The Dangers of Non-OEM Valve Parts


Although Non-Original Equipment Manufacturers (OEM) parts may look the same as an original part and may fit into the valve being repaired, the parts do not meet the original valve manufacturer’s design specifications. Because of this, replicated parts can cause leaks, prevent a valve from controlling properly, and often do not last as long as the OEM alternative would. The parts can also fail completely, preventing the valve from operating and causing an entire process to be shut down at a cost of hundreds of thousands of dollars per day. Below are the leading issues caused by dimensional and material problems in non-OEM valve parts.
 
 
Poor Control Around Setpoint
Friction is the enemy of good control and a dimensional issue can massively increase friction.This can make a valve harder to operate and can result in a valve actuator that is no longer able to position the valve to the set point sent out by the control system. The issue causes operational waste and is often difficult to trace back to the offending valve.
 
Reduced Service Life
Higher friction can quickly lead to increased wear and lower service life. It’s common for a valve manufacturer to harden mating or trim parts to increase their service life. Valve manufacturers have the equipment and engineering capabilities to perform hardening correctly, but non-OEM replicators may not, and usually don’t have access to the specifications for overlays and other critical processes for reducing friction.
 
Galling of Metal
Galling is a very common problem that needs to be addressed in the original valve design, as there are always mating parts. If a valve is installed in a process that requires hardened trim but the replicator doesn’t harden the parts, the parts can gall the surface and quickly fail.
 
Leaks
Leaks through the packing or flanges due to substandard parts can cause operational waste, process control, safety, OSHA or EPA issues. One critical manufacturing process that can’t be easily measured or duplicated by a replicator is stem finish, which relates to packing life and leakage. 
 
Valve Failure
A complete failure is rare but can happen when a replicator does not have the product expertise to understand design limitations. This can lead to a dangerous plant situation, causing a plant to shut down, or causing a more serious incident. Most safety systems will catch a critical control valve failure, but they are designed to bring a plant to a safe shutdown and that means lost production time.

Contact a PCE Representative today for your OEM parts needs.