A lined valve carries a corrosion-resistant layer, usually PTFE, PFA, glass or rubber, bonded or loose-lined inside a cast or ductile iron body. The body provides strength and the lining provides chemical resistance.
Chlor-alkali, acid, brine, hypochlorite, pharmaceutical and food plants use lined valves where a metal body would corrode. They are expensive, specified carefully, and replaced on condition rather than on schedule.
We buy lined valves in any quantity — single items, mixed pallets or whole cribs, including valves that need repair and assemblies that are missing parts. We do not require a clean inventory before reviewing a list.
| Common patterns | PTFE and PFA lined plug and ball, Glass lined butterfly and ball, Rubber and ebonite lined butterfly, Lined diaphragm valves |
|---|---|
| Typical service | Chlor-alkali, Acid and brine service, Pharmaceutical |
| What we look at | Lining material, body material, pattern, size and the condition of the lining. We ask for photographs inside the bore, and whether the valve was flushed before removal. |
| What to keep | Do not drop them and do not store them with the lining under load. Photograph the lining through the bore, because that is what a buyer needs to see first. |
Patterns and variants
What turns up most often
Variants matter because they change the buyer pool. A standard pattern sells to a rebuilder or a plant with the same service; a specialised trim sells to a much smaller group but often at a higher price. If you are unsure which variant you have, the nameplate or the trim marking will usually say.
Before it leaves site
How to protect the value
Do not drop them and do not store them with the lining under load. Photograph the lining through the bore, because that is what a buyer needs to see first.
Where they come from
Industries and services
- Chlor-alkali
- Acid and brine service
- Pharmaceutical
Most of the surplus we see comes from plants that have replaced equipment for a reason that has nothing to do with the valve: a unit was re-rated, a line was re-piped, a control loop was upgraded or a project was re-scoped. The valve is simply the part that has to move.
Related patterns
Other valve types
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Read →Questions sellers ask
Do you buy valves with lining damage?
Sometimes. A small blister is different from a breached lining, so describe it precisely and send a photograph.
Which lining holds value best?
PFA and PTFE generally, followed by glass and hard rubber. All of them are worth reviewing in the right pattern.
Are lined valves worth more than stainless?
Often, in the right service. The comparison is not straightforward, which is why we look at each lot.