A Guide To Lubricated vs. Non-Lubricated Plug Valves

Mid-Atlantic Helps You Learn Everything You Need To Know

Here’s our guide to lubricated vs. non-lubricated plug valves. Last month, we took an in-depth look at ball valves, how they function, and their use across multiple industries. This month we are going to give a complete guide to lubricated and non-lubricated plug valves. We will also discuss how our team at Mid-Atlantic, Inc. can be a solution for any equipment maintenance product.


Get A Better Seal With Less Effort

The major difference is that lubricated valves have the ability to seal tighter. The lubricant reduces the force required to open or close the valve and allows smooth movement of the plug. It also prevents corrosion of the plug.


Also with plug valves, all maintenance and repair can take place without removing it from the pipeline. These types of valves are excellent for quick shutoff in the event of an emergency. The high friction resulting from the design limits their use for accurate modulating of material flowing through the valve. Ball valves are a better fit for when flow rate requires some for sort of quick adjustability.


Lubricated Plug Valves Require Special Lubricant To Work Properly

The lubricating material must be compatible with the product running through the pipeline. It should not dissolve or wash away by the flowing material. This is extremely critical in oil, gas, and food and beverage manufacturing. Also, the sealant used must be able to withstand the temperature of the flowing material. Without a lubricant, surfaces inside the valve cab wear out very fast.


Plug Valve Lubricants Available at Mid-Atlantic, Inc.

Lubricants also prevent oxidation or corrosion; therefore, Mid-Atlantic, Inc. is are proud to provide the best sealants in the natural gas industry. We carry a wide variety of sealweld products for our customer’s specific needs. Sealweld’s line of synthetic valve lubricant will remain soft and pliable over time while not breaking down or hardening.


The Purpose of Non-Lubricated Plug Valves

Non-lubricated plugs operate better in lower pressure pipeline systems. Non-lubricated plug valves are chosen for use over their lubricated counterparts because they require minimal maintenance. A downside to using non-lubricated valves is the quick deterioration of their valve seats. Dirt and other debris that may flow through the pipeline system and cause the valve seat to wear down.


For more information, give Mid-Atlantic Inc. a call at (724) 220-5415. We are happy to talk to you about lubricated vs non-lubricated plug valves.