俄罗斯采购需求：DO计，溶解氧仪，在线溶解氧仪，便携式溶解氧仪，光学溶解氧仪，溶解氧分析仪

We are seeking a manufacturer for 53 general-purpose industrial filters for Leningrad NPP-2, specifically for power units No. 3 and No. 4. These filters are essential for various applications, including turbine condensate purification, condensate polishing regeneration, and cooling system corrosion removal. Key requirements include operation within 1.0 to 1.6 MPa pressure and 35 to 50 °C temperature. We need filters made from austenitic stainless steel, with a service life of 60 years and a warranty period of 24 months post-commissioning. Please provide specifications and pricing at your earliest convenience.