Transparent Mica Gasket Glass Assembly For Yarway Color Port Water Gage

Repair Kit Part No. 924329
Pressure Rating: 1050 psi
For use with Color-Port Figure Numbers 4570 thru 4580 and 4585

Glasses are accurately molded and tempered to Yarway specifications. The assembly of glass, mica and gasket is registered precisely in the gasket groove in the body.

At boiler pressures above 300 psig, high-temperature water will corrode unprotected gage glass. A thin sheet of high-quality ruby mica on the inner surface of each port protects the gage glass from the corrosive attack of steam, water and alkalis; however, this protection is not permanent. Continual exposure to high temperature, high-pressure water will also corrode the mica shield. The rate at which this corrosion occurs is significantly less than that of glass, and is dependent upon a number of factors. Generally, the higher the operating temperature, the higher the rate of attack.

WARNING: Replace immediately when glass appears white or opaque. Failure to promptly replace the mica-gasket-glass assembly that appears white or opaque can result in catastrophic failure of the glass with violent discharge of hazardous high velocity steam. The discharge of high-velocity steam can result in personal injury and property damage may occur.