Two-way threaded linear valve, DN25 (1 inch) specification, flow coefficient 11.7Kvs (about 11.7Cv), nominal pressure PN20 (20bar). The valve body is made of bronze, the valve stem and the valve core are stainless steel, and the sealing seat is replaceable. Stroke 20mm, the valve stem is closed downward (positive effect), the leakage rate is less than or equal to 0.05% Kvs, and the adjustable ratio is 50:1. The applicable temperature of the water medium is 2-120 ° C, the steam medium is less than or equal to 170 ° C. The maximum working pressure under steam conditions is 7bar, and the maximum working pressure under hydraulic conditions can reach 20bar. The weight is about 1.5kg, accurately matching the control requirements of small and medium flow pipelines.