Control Seal Non-Contact Rising Stem Ball Valves (RSBV) provide friction-free operation. The RSBV’s design helps eliminate issues often associated with trunnion mounted, floating ball, and other conventional valve types under extreme conditions such as:
|DESIGN||API 6D, ASME B16.34|
|FACE to FACE||API 6D, ASME B16.10, B16.47|
|FLANGES||ASME B16.5, B16.25|
|FIRE SAFE||ISO 10497, API 6FA, BS 6755|
|FUGITIVE EMISSION||ISO 15848, TÜV, Shell MESC SPE 77-312|
|TESTING||API 598, API6D, ISO 5208|
Rising Stem Ball valves are typically used in applications such as:
Control Seal RSBV features a HELIXSTEM® rotating mechanism that eliminates friction between the ball and seat’s sealing surfaces during rotation. The stem’s linear movement is transferred into two ball movement stages, causing it to tilt and then rotate. Due to the HELIXSTEM® design, the linear stem movement enables fast opening and closing, and it also minimizes the stress on the packing rings (no rotation). Features include:
Control Seal HELIXSTEM® RSBV has metal to metal sealing. The metal to metal sealing provides 100% shut-off without the need for Teflon or any other soft material inserts, increasing the longevity of the valve, especially in applications with entrained particles.
Control Seal High Performance rising stem ball valves are fully bi-directional to the following leak rates:
Control Seal pneumatic actuators are piston-type double-acting actuators with a control panel including limit switches, solenoid valves, and other accessories.
No external tie rods: frequently, the double-acting piston actuators supplied with RSBVs have external tie rods that, when exposed to the environment, can corrode over time, potentially resulting in severe actuator damage and leakage. Control Seal’s double-acting piston actuators do not require any external tie rods.
Non-sticking design: commonly, rubber seals are used as the main seals in piston actuators. These may stick to the cylinder wall during a long standstill, causing fatal actuator leakage. Control seal solved this issue by using special non-stick Teflon reinforced seals. Moreover, all the internals are nickel plated instead of commonly used chrome plating to optimize the unique seal design benefits and ensure that the actuator performs seamlessly after long periods of inactivity.
Integrated Hydraulic Dampener: for smooth actuator operations. Control Seal’s piston actuators have an integrated hydraulic dampener system located on top of the actuator (Non-Intrusive) and are a closed-loop system with an external accumulator.