1. What is the value of flow coefficient Kv? What is the flow coefficient Cv?
Volumetric flow of water flowing between 5 ° C (40 ° F) and 40 ° C (104 ° F) through the valve to produce a pressure loss of 1 bar (14.7 psi), expressed in cubic meters per hour.
Kv = Cv / 1.156
Flow coefficient Cv: It is the mass flow rate when water flows through the valve at 15.6 ° C (60 ° F) to produce 1psi, expressed in gallons per minute.
2. What is a pressure bearing?
Design parts that can withstand the pressure of pipeline media, such as valve body, bonnet, packing gland, valve stem, gasket and stud.
3. What is a pressure control part?
Refers to those parts used to prevent or allow the flow of media, such as valve seats, balls, discs, gates, discs and other seals.
4. What is ferritic stainless steel? What is austenitic stainless steel? What is the difference between the applicable media?
The solid-solution solid-centered cubic lattice of carbon in α-iron in stainless steel is ferritic stainless steel; the solid solution of carbon in γ-iron forms face-centered cubic lattice is austenitic stainless steel.
Ferritic stainless steel is suitable for corrosive media such as acetic acid and lactic acid; austenitic stainless steel is suitable for corrosive media such as nitric acid, sulfuric acid and acetic acid.