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C5 anti-corrosion and salt spray rating is an international standard related to metal surface coating and anti-corrosion, mainly used to measure the corrosion resistance of metal objects in harsh environments. valves with C5 anti-corrosion and salt spray grade is usually applied to metal components and equipment in industries such as marine, coastal, oilfield, and chemical industries that require high anti-corrosion requirements.

Nozzle Check valves also called axial flow check are very important for non-return fluid purpose with non-slamming and fast closing

characteristics. 

Stainless steel valves, duplex stainless steel valves, and Hastelloy valves are applied in different high corrosion environments, harsh working condition.Stainless steel valve are mainly for petrochemial industry, sanitary industry and some times treated sewage water TSE, Duplex Stainless steel are mainly for sea water. Hastelloy valve for severe corrossion and even high temperature and high pressure. 

Butterfly valves have shorter body length compared with same size ball valves.

So Butterfly valves is more compacted and and space-saving during the installation.

The Butterfly valves length (Face to Face Dimension) meets standard of EN558 series 20, Series 13, Series 14. The longest face to face dimension is Series EN558 series 14. (It is equal to DIN3202 F4), Other series are much more common used and their length is much shorter then EN558 series 14, especially EN558 series 20, it is very short and thin body includes wafer and lug and U section design.

Fusion Bonded Epoxy is a one-part, heat cured, thermosetting epoxy coating that is applied as adry powder to the sandblasted surface of a pre-heated valve and then fused and cured in a high-temperature oven. The result is a durable coating with exceptional abrasion and chemical resistanceideally suited for valves in water and wastewater applications.

A pipe sight glass — which is also called a sight window or view port, is a transparent window that provides a means of seeing inside a process pipe or tank.