In Below Sealed Valves, conventional gland packing is replaced by a bellows cartridge welded to the valve bonnet and stem. A bellow is a long accordion-like tube. As the valve stem strokes, the bellows expands or compresses with the stroke movement. There are no sliding or rotating seals through which process fluid can pass.
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Ng Tommy (encord sdn bhd)
No1 Jalan TP1, Taman Perindsutrian UEP Subang Jaya, Malaysia
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