Solon Mfg. Co. Flange Washers
are special high temperature Belleville Springs which were developed by Solon Manufacturing in 1968. Solon Flange Washers are designed to maintain sufficient bolt tension and resultant gasket pressure by compensating for bolt creep, gasket relaxation and differential expansion during pressure and temperature changes.
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- Flange joints are another area where live loading can be used to prevent fugitive emissions. Flange joints develop leaks for a variety of reason, such as differential thermal expansion, bolt creep and vibration. All of these cause extreme variations in bolt and gasket loads, which is the main cause of flange leaks. By installing Solon Flange Washers, the bolt and gasket loads are maintained well above the minimum seal gasket pressure. These high temperature Belleville Springs have been designed to maintain the high loads necessary to keep flange joints tight and leak free.
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- Thermal Shock produces differential axial expansion or contraction as the flange heats or cools at a faster rate than the flange bolts. The same differential expansion occurs in cryogenic flanges during start up and cyclic operations. High temperature creep in flange bolts and gaskets has the net effect of lowering the gasket load.
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- Vibration and Pressure Surges cause bolt deformation (stretching) and reduce gasket loading. Solon Flange Washers absorb vibration shocks preventing bolt stretching and reduce gasket compression.
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- Mechanical Shock creates peak shock stresses, which cause deformation in bolts and gaskets, thus loosening the joint enough to cause leakage. By absorbing peak stresses, Solon Flange Washers prevent damage to bolts and gaskets.