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Liners
Liner for Iris Valves
Product Details
A useful option to use in conjunction with a Mucon Iris Valve is a LINER. A Liner is simply a tube of flexible material, which passes through the valve, which is constricted (or throttled) by a closing diaphragm.
Why use a Liner?
- To assist diaphragm opening
- To combat diaphragm wear
- To isolate the valve and sleeve from the product
- To provide a means of sealing against a fine product where a high head-load is involved when a rubber liner is used in conjunction with a fabric sleeve.
TYPES OF LINER
- Single flanged liner -fits between valve and mounting flange.
- Double flanged liner - usually clamped either side of the valve or between spacer pieces to make a "pinch valve" arrangement. Isolates valve from product.
- Ringed liner - to clamp into the upper half of an AD or ED Valve with just a single diaphragm in lower.Â
LINER "HEM" OPTIONS
As already mentioned liners can be fitted with flanges at both ends. i.e. Double Flanged liners. Free hanging liners can be furnished with a variety of "hems".
- Plain hem - fine for most products.
- Weighted hem - Stainless Steel ring sewn into hem, also useful to locate liner into neck of a container etc.Â
DIAPHRAGM / LINER COMBINATIONS
For the majority of applications a rubber liner (abrasion resistant or Food Quality) is used in conjunction with a fabric diaphragm. The fabric diaphragm giving the best "strangling" characteristics. - Fabric Diaphragms / Fabric liners are O.K. - Fabric Diaphragms/ Coated Fabric and Rubber liners are O.K. - Coated Fabric or Rubber Diaphragms/ Coated Fabric or Rubber liners can be problematic and should be avoided. Liners can be fitted to series AS,AD,BS,BD,C,ED,and H valves and are fabricated from the following sheet materials:
- Nylon 2oz,4oz and 7ozÂ
- Terylene 4oz and 7ozÂ
- Anti Static Nylon and Black Anti Static RubberÂ
- Polyurethane coated 2oz & 4oz NylonÂ
- Neoprene coated Mockleno, Hypalon Coated Nylon and Viton Coated Terylene
- White FDA approved Natural Rubber and T893 Red Abrasion resistant RubberÂ
- Teflon
Variations of construction of some liners is available for applications that may involve liquids.
Please refer to Process Components for advice.
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