Conical disc design
Benefit from the cone and streamline shape design, the disc can remove the impurity, keep valve in reliable seal and longer service life.
Double seal design (bellows+packing)
Bellow from a metal seal to prevent leakage, and packing can provide seal if the bellow failed.
Patented central locate design. It can protect stem from tremble and lower noise, so the bellow is with stable performance and long service life.
Coated sand casting technology
Sand mixed with binder and other additives, which makes the rough casting with less defects like pore, trachoma and cracks, and better tensile strength.
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