What is the difference between sleeved and lined plug valves?

It is their design that sets plug valves apart from the rest of what’s on catalogs. This layout is cylindrical or conically-tapered, that which you can rotate within the valve body to control the flow across the valve. 

Regarded as less pricey compared with those others, these plug valves are categorized into various types. Two of them are the sleeved and the lined variants. Learn more about them in this discussion that will tackle these pointers:

– Sealing mechanism

– Internal protection

– Resistance to corrosion

– Ease of operations

– Industrial applications

– Maintenance requirements

Sealing Mechanism

The first point of difference between sleeved and lined plug valves is their sealing mechanism. While the former uses a soft sleeve – such as elastomer and PTFE – for sealing around the plug area, the other is completely lined with PTFE, PFA, and rubber for total isolation of the fluid’s metal parts. This is what valves that are sleeved lined plug valves don’t possess.

Internal Protection

Regarding internal protections, sleeved plug valves maneuver against the sleeve for sealing, with the metal parts still exposed to fluids, while in your lined plug valves, both the plug and the body are lined completely, providing protection to every internal surface.

Resistance to Corrosion

Considering resistance against corrosion, lined plug valves overshadow the other. With your sleeved plug valves, resistance is at its finest, but there’s some exposure to process fluid, depending on the sleeve material. On the other hand, lined plug valves offer better resistance to aggressive chemicals, perfect for highly corrosive media. 

Ease of Operations

Sleeved plug valves are low in friction due to their sleeve material. Thus, smoother operations. Meanwhile, lined plug valves could also have low friction, but this may not be as smooth as the former. 

Industrial Applications

The sleeved type is best for abrasive and corrosive media, particularly in petrochemicals and other relevant industries. Conversely, especially in the case of a PFA-lined plug valve, they are ideal for extreme environments.

Maintenance Requirements

Which requires industries to give it higher maintenance? It’s the lined variant. They need careful handling since damages to the lining may take your industry to exposing the metal parts. Meanwhile, the easier maintenance for sleeved plug valves are due to the sleeve’s capability to lubricate itself. 

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Versatile flow control with anti-blowout design and full PFA lining.

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Thanks to these contrasts, industries can determine which of these two are better for their intended applications. If you are in search of industrial valves that contribute to the fulfillment of your industry’s objectives, then consider sourcing them out from YOUFUMI. 
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