Stainless steel check valves and ordinary check valves are made of different materials, with the former using stainless steel and the latter using plastic or galvanized carbon steel. Someone asked, can stainless steel check valves be replaced with ordinary check valves?
The answer is negative because their applicable scenarios are fundamentally different. For the usage scenario of stainless steel check valves, ordinary check valves have insufficient performance and cannot be replaced at all.
In terms of sealing, stainless steel check valves adopt a hard sealing structure, which is suitable for high-pressure and high-temperature working conditions; Ordinary plastic valves often use soft sealing structures, which are prone to aging and failure during use.
In terms of fluid resistance, the swing and double flap design of stainless steel check valves can reduce pressure loss; Ordinary plastic valves have smooth flow channels, but their strength limits the diameter size.
In terms of fire resistance, the stainless steel check valve has a fully metal structure that is flame-retardant and automatically locks at temperatures above 150 ℃; Ordinary plastic valves are prone to melting and causing secondary disasters when exposed to open flames.
In summary, stainless steel check valves are suitable for chemical pipelines containing corrosive media, power plant steam systems, and high-rise building fire and smoke exhaust ducts. Ordinary check valves are more suitable for low-pressure domestic water supply systems and temporary ventilation ducts.