BENTLY 3500/33 149986-01

Description

BENTLY 3500/33 149986-01

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The 3500/33 149986-01 butterfly valve adopts soft seals such as “O” rings, sealing rings, and liners. When the valve is closed, the deformation of the soft seals causes the valve plate to close in place and wrap around the valve plate, achieving a very ideal cutting effect. But when the valve is about to open, the force required by the actuator to open the valve plate continues to increase. When the frictional force of the soft seal on the valve plate is equal, the valve plate starts. Once activated, this frictional force decreases sharply. To achieve force balance, the valve plate opens violently. When the unbalanced torque of the force acting on the corresponding opening medium is balanced with the opening torque of the actuator, the valve stops at this opening. This violent and sudden jump can open up to 30-50%, which will cause a series of problems. At the same time, due to significant changes in the soft seal during closure, it is prone to permanent deformation or being crushed or pulled by the valve plate, which can affect its lifespan. The solution for 3500/33 149986-01 is to adjust the friction force of the soft seal on the valve plate during start-up, which can ensure the required cut-off and enable the valve to start normally. The specific methods include:

① Adjust the interference fit;

② By limiting or adjusting the pre tightening force and output force of the actuator, the difficulty caused by excessive valve plate closure on opening can be reduced.

Please contact us for the best price. Email: 【sauldcsplc@gmail.com】

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Mailbox：sauldcsplc@gmail.com | BENTLY 3500/33 149986-01
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