شیر یکطرفه بالابر پیستونی برودتی CNG LNG بدون آهنگری

The CNG LNG cryogenic piston lifting check valve free forged is engineered to ensure backflow prevention in ultra-low temperature environments commonly found in liquefied gas systems such as CNG and LNG applications. Its piston-type lifting mechanism provides precise, responsive flow control and seals tightly upon flow reversal, which is critical for protecting downstream equipment in cryogenic conditions. The free forged body enhances the valve’s structural strength, pressure resistance, and resistance to thermal shock, which is vital for maintaining performance at temperatures as low as -196°C. Designed with an extended bonnet, it isolates the stem and packing from direct contact with cryogenic fluids, minimizing leakage risks. This valve is widely used in LNG terminals, gas liquefaction plants, and cryogenic storage tanks where safety, durability, and zero leakage are non-negotiable. Its compact size, low cracking pressure, and robust sealing performance make it ideal for high-integrity gas systems under extreme conditions.