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How does bellow seal globe valve work

How does bellow seal globe valve work

Submitted by • August 13, 2020 www.ntgdvalve.com

The key component of the bellows globe valve is the metal bellows. The lower end and the stem assembly are welded by automatic seam welding, and the upper end is welded by automatic seam welding to the connecting plate, forming a metal barrier between the fluid medium and the atmosphere, ensuring zero leakage of the valve stem . The sealing surface of the valve disc and the valve body is precisely ground, and after the assembly is completed, the pressure test is 100%, and all have reached zero leakage. As an auxiliary seal, the stuffing box is still retained on the bellows, which increases reliability and safety. The metal bellows of the high-pressure valve are of multi-layer structure, and through hydroforming, it can guarantee the open/close life of 10000 times under the maximum pressure .

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