Modco closures join NOV’s industry-leading Yale™ and Sentry™ closure brands. Known as the standard for quality and reliability, NOV closures provide access to closed systems for pipeline and pressure vessel inspection.  

Starting with Yale closures in 1958, our product suite has evolved from the original threaded Figure 500 closure providing operating ease and safety with its rugged design features to the Sentry closure with its simple locking ring, enabling quick-opening and fail-safe capabilities. 

Contact us at [email protected] for assistance with selecting the best closure for your application.