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J-VALVES
Construction Features
316L Low-Carbon Stainless Steel Material: The body is cast from ASTM A351 CF3M (316L) stainless steel with a carbon content ≤ 0.03%, delivering excellent intergranular corrosion resistance. It is especially suitable for applications where solution treatment cannot be performed after welding, as well as highly corrosive media environments such as seawater, chloride-containing media, acids and alkalis.
Y-Type Flow Passage Design: Fluid enters the screen at a 45° angle with a low flow resistance coefficient (typically 1/3 to 1/2 that of T-type strainers), low pressure drop and high flow capacity, making it ideal for high-flow conditions.
Flanged Connection: Equipped with RF (Raised Face) flanges complying with EN 1092-1 / DIN standards. The PN16 pressure rating ensures reliable connection under medium and low-pressure conditions, facilitating system installation, maintenance and replacement.
Replaceable Screen Design: Built-in stainless steel woven wire mesh or perforated plate screen with selectable filtration ratings (normally 20–400 mesh). The flanged cover design allows quick screen removal and replacement without detaching the strainer from the pipeline.
Blowdown Port Design: A blowdown port (NPT or G thread) is provided at the bottom of the body, which can be fitted with a blowdown valve or blind plug to enable online blowdown without system shutdown for cleaning.
Optional Magnetic Adsorption: For applications with ferromagnetic particles, a permanent magnet adsorption device is available to enhance filtration performance and protect precision equipment.
Pressure Balanced Design: Inlet and outlet flanges are coaxial with no directional restriction for installation (normally low inlet and high outlet), ensuring stable flow conditions.
Compact & Lightweight Design: The DN50 size features a compact, lightweight structure ideal for installation in space-restricted piping systems.
Technical Parameters
Nominal Diameter: DN50 (2 inches)
Pressure Rating: PN16 (1.6 MPa)
Temperature Range: -29℃ to +425℃
Body: ASTM A351 CF3M (316L) stainless steel
Bonnet / Cover: CF3M (316L) stainless steel
Screen: 304 / 316 / 316L stainless steel woven mesh or perforated plate
Screen Support: 316L stainless steel
Gasket: PTFE, flexible graphite, spiral-wound gasket (selected according to temperature)
Bolts / Nuts: A2-70 / A4-70 stainless steel (matching 316L) or galvanized steel
Connection Type: Flanged (RF, conforming to EN 1092-1 / DIN 2501)
Filtration Rating: 20, 40, 60, 80, 100, 150, 200, 300, 400 mesh (customizable)
Mesh Opening Size: 0.04~0.9 mm (corresponding to different mesh counts)
Effective Filtration Area: ≥ 3~5 times the pipeline cross-sectional area (reduces pressure drop and extends cleaning intervals)
Blowdown Port: G 1/2" / NPT 1/2" (standard), optional ball valve for blowdown
Design Standard: GB/T 12235, HG/T 21637
Inspection Standard: GB/T 13927
Face-to-Face Dimension: Complies with GB/T 12221
Applications
Chemical Industry: Filtration of corrosive chemical media including acids, alkalis and salts, protecting downstream equipment such as pumps, valves, heat exchangers and metering instruments.
Water Treatment Industry: Filtration for reverse osmosis, ultrafiltration, water softening and circulating water systems. Resists chloride corrosion and protects membrane modules and precision equipment.
Offshore Engineering: Filtration for seawater desalination and offshore platform piping systems. 316L material provides excellent resistance to seawater corrosion.
HVAC: Filtration for cooling water and hot water systems, preventing impurities from clogging heat exchangers, valves and terminal units.
General Industrial Use: Filtration of water, oil, gas and weakly corrosive media, ensuring stable operation of downstream precision equipment.
Advantages & Value
Excellent Corrosion Resistance: 316L low-carbon stainless steel offers significantly better intergranular corrosion resistance after welding than 316, extending service life in highly corrosive environments.
Low Pressure Drop & High Efficiency: Y-type flow passage minimizes flow resistance; large effective filtration area ensures low pressure drop and high flow capacity, reducing pumping energy consumption.
Convenient & Fast Maintenance: The flanged cover allows screen replacement without pipeline removal. The blowdown port supports online cleaning, minimizing system downtime.
Economical & Practical: DN50 medium size balances filtration performance and cost efficiency. 316L provides superior cost-performance compared to higher-grade alloys in corrosive applications.
Flexible Installation: Standardized flanged connection ensures high interchangeability. Y-type design permits horizontal or vertical installation to adapt to various pipeline layouts.
Downstream Equipment Protection: Effectively removes solid particles and impurities, extending the service life of pumps, valves, heat exchangers, instruments and other precision components while reducing system failure rates.
Strong Functional Expandability: Optional accessories including magnetic adsorption, differential pressure gauges and blowdown valves enable intelligent monitoring and automatic maintenance.
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