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20” full opening pressure manhole, general purpose access door for non-code applications <= 12PSI for cargo tank / industrial / bulk storage tanks.
Knappco Industrial Product Catalog
20" Pressure Manhole Covers
Civacon is dedicated to designing, manufacturing and distributing world-class solutions for the safe handling and transporting of petroleum products.
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Civacon systems set the standard for real-world performance in the most rigorous and demanding applications.
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Covering the full gamut of systems and accessories that are required for electrical monitoring and overfill detection during the loading and unloading of hazardous liquid products.
Providing the widest range of interconnect ability and highest level of reliability while ensuring operator and facility safety during loading or unloading of products from cargo tanks.
These products are precision-engineered and manufactured to meet the product-handling requirements of a wide range of dry-bulk industries and applications.
Optimizing the handling of a wide variety of commodities, including salt, cement, sand chemicals, crude oil, dry food products and plastic pellets.
Products engineered to be used in general-purpose applications on cargo tanks, industrial tanks and bulk-storage tanks.
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