How to Distinguish Between Gray Iron Valves and Ductile Iron Valves

Under Chinese national standards (GB), ductile iron is typically designated as QT400-15, QT400-18, etc. Here, "QT" is the abbreviation for ductile iron (spheroidal graphite iron), "400" indicates the tensile strength, and "15" or "18" indicates the elongation percentage. International designations vary widely; for example, European standards use EN-GJS-400-15/18, while German standards use grades such as GGG40, GGG40.3, and GGG50.

HDPE Sheet

HDPE, scientifically known as high-density polyethylene, is a thermoplastic made from the polymerization of ethylene monomers. HDPE sheet is made primarily from HDPE resin through processes such as extrusion or compression molding.

PTFE SHEET

As the leading stockists and manufacturers of high-performance fluoroplastics, here at WEITEN we are constantly striving to develop new and exciting products for our customers. PTFE sheets are one of our most recent developments, and like our specialist fluoropolymer tubes and rods, they are highly effective in a variety of business scenarios.

Manual Gear-Operated Stainless Steel Butterfly Valve

1. This valve utilizes a triple-offset sealing structure; there is virtually no wear between the valve seat and the butterfly plate, and the sealing performance improves as the valve closes tighter.

Rubber-steel Flange Gaskets

Rubber-steel gaskets have amassed a wide range of applications in sealing technology. Wherever the secure sealing of media with an exceptionally low leak rate, as well as low bolt loads at relatively low temperatures is required, rubber-steel gaskets provide the optimal solution.The steel support ring prevents a blow out of the gasket and increases stability, allowing the rubber-steel gasket to be handled easily, even in difficult fitting conditions.The rubber sealing material ensures a secure seal is created, even in uneven locations, as it has an excellent ability to adapt to sealing surfaces.

What is the PTFE Packing with Kynol Fiber Corners？

In harsh industrial environments, standard packing materials often struggle to maintain reliable sealing. PTFE offers excellent chemical resistance and low friction but lacks mechanical strength and high-temperature stability. Aramid fibers provide strength but may not withstand extreme heat or certain aggressive media.