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The MIDLAND INDUSTRIES CDC-300-DP is a Type DC dust cap designed to protect female cam and groove couplers from contamination when not in use. Constructed from ductile iron, this cap threads or snaps onto a 3-inch female coupler to seal the connection and prevent debris ingress during storage or transport. It handles a maximum operating pressure of 150 psi and carries a casting temperature range of -20 to 500 degrees F, making it suitable for demanding industrial and fluid-transfer applications. Plumbers, pipefitters, and industrial maintenance technicians typically install this type of fitting.
This dust cap is used in cam and groove hose coupling systems commonly found in industrial fluid transfer, bulk liquid handling, chemical processing, and general-purpose hose line assemblies. The 3-inch connection size fits standard Type DC female coupler ports. Its ductile iron construction provides the durability needed in heavy-use environments where repeated connection and disconnection occur. The gasket temperature rating of -40 to 212 degrees F ensures the internal seal remains functional across a wide range of service conditions.
Designed as an OEM-style replacement or standard accessory for 3-inch female cam and groove couplers in iron cam and groove hose fitting systems.
Installation is performed by pipefitters or industrial maintenance technicians familiar with cam and groove coupling systems. Depressurize and drain the hose line completely before attaching or removing any cam and groove fittings or dust caps. Inspect the gasket for wear or damage before each installation to ensure a proper seal. Follow applicable facility safety procedures and any relevant local plumbing or industrial piping codes when servicing fluid transfer lines.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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