SENTRY closures are a quick-opening, internal door design with a one-piece seal, and easy one-person operation. SENTRY is the most popular internal door closure due to its versatile features, rugged construction, economical price and quick availability.

Yale quick-opening high pressure closures are the industry leader. Yale closures were the first to include a threaded design for unparalleled safety and operating ease. With state-of-the-art manufacturing, outstanding engineering, superior quality control procedures and complete service after the sale, Yale Fig. 500® & Fig. 500R® closures are the smart choice for productivity, durability and safety. Yale Closures have over 60 years of reliable field service and are available in all sizes, lugged or lugless designs, and a flanged design.