Wedge within Wedge Isolation Valve

Double disc wedge-within-wedge for extreme conditions

IMI Z&J introduced the wedge-within-wedge gate valve to the market, leveraging over 60 years of experience. This patented design, first launched in 1956, is ideal for extreme operating conditions such as high temperature, high pressure, line stresses, and high operational frequency. Its robust design makes it highly reliable for use in critical applications.

Double disc design: Available as double block and purge or double block and bleed, ensuring reliable isolation.
Metal-to-metal seating: Provides a positive seal that is resistant to wear and corrosion.
Rising stem (O&Y type): Ensures easy inspection and prevents the stem from binding.
Flexible connections: Available with flanges or butt-weld ends to fit various piping systems.

Benefits of Wedge within Wedge Isolation Valve

No jamming: The discs collapse and are free to move during actuation, preventing sticking even under extreme conditions.
Tightness and flexibility: Achieved through the central ball pressing the discs between internal wedges, providing a positive seal.
Minimal wear: Short travel contacts on the sealing seats reduce wear, extending valve life.
Low differential pressure: Seat surfaces remain free of wear due to axial pressing in the closed position, even under low-pressure conditions.
Actuator options: Available with electric, hydraulic, or pneumatic actuators.
No cooling water required: Simplifies operation in high-temperature environments.
Minimal spare parts: Designed to reduce maintenance requirements and downtime.
100% actuator redundancy: Ensures reliable operation without failure.