Keystone F410/419 Handles

The Keystone™ F410 and F419 Handles, engineered by Emerson, are manual operating devices designed for reliable and efficient control of Keystone butterfly valves and other compatible quarter-turn valves. These handles provide precise manual operation, ensuring smooth valve opening, closing, and throttling across a wide range of industrial applications. Constructed from robust, corrosion-resistant materials, the F410 and F419 handles are engineered for long-term durability, even in harsh environments such as chemical processing plants, water treatment facilities, and marine systems. The F410 model features a notched quadrant plate for secure multi-position locking, enabling accurate flow control and isolation. The F419 model, on the other hand, is equipped with a padlockable locking mechanism, providing additional safety and tamper resistance for critical service applications. Both models are designed for ergonomic handling, ease of operation, and simple installation with Keystone’s industry-standard valve mounting interfaces. The F410/419 handles are ideal for manual control applications where precision, reliability, and operator safety are essential.

Feature of

• Ergonomic grip ensures efficient and easy operation of quarter turn valves
• Corrosion resistant material
• Clear indication of disc position
• Various versions for elevated or low temperature applications
• High strength materials like steel, stainless steel and composite materials
• Innovative mounting design
• Raised above insulation piping
• Lever lock in 10 positions
• Provisions for padlock device