Stainless Steel A351-CF8M Straight Globe Valve - DIN PN16, Flanged
Tengs Valve supplies high-quality Stainless Steel A351-CF8M Straight Globe Valves for DIN PN16 flanged applications. These globe stop valves feature rising stem, OS&Y, bolted bonnet design with plug or parabolic disc. Available in sizes from DN50 to DN450 with pressure rating PN16. End connections include flanged raised face (RF) or flat face (FF). Operated by handwheel, bevel gear, or bare stem. Ideal for water treatment, chemical, petrochemical, and industrial pipeline applications requiring excellent corrosion resistance.
Stainless Steel Straight Globe Valve Specifications
• Design Standards: DIN 3356
• Face to Face: DIN 3202
• Inspection & Test: DIN 3230
• Flange Standard: EN 1092, DIN 2543
• Type of Valve: Globe, Stop Valve, Straight Type
• Valve Size: DN50 to DN450
• Nominal Pressure: PN16
• End Connections: Flanged, Raised Face (RF), Flat Face (FF)
• Disc Type: Plug Disc or Parabolic Disc
• Bonnet Type: Bolted Bonnet (B.B.)
• Stem Type: Rising Stem (RS)
• Body Material: Cast Stainless Steel A351-CF8M
• Trim Material: SS316
• Drive Type: Handwheel, Bevel Gear, Bare Stem
• Sour Condition: NACE MR 0175
• Special Design: Available
✓ CF8M (316 stainless steel) offers excellent corrosion resistance in chemical and petrochemical service
CF8M vs CF8 vs CF3M: Stainless Steel Grade Comparison for Globe Valves
| Grade | Wrought Equivalent | Key Alloying Element | Corrosion Resistance | Typical Application |
|---|---|---|---|---|
| CF8 | AISI 304 | 18Cr-8Ni | General corrosion resistance | Water treatment, food processing, general industrial service |
| CF8M | AISI 316 | 18Cr-10Ni-2Mo | Improved chloride resistance | Chemical processing, petrochemical, marine, dye and paper |
| CF3M | AISI 316L | 18Cr-10Ni-2Mo (low C) | Superior intergranular corrosion resistance | Welded construction, seawater, chemical, LNG, pharmaceutical |
Reference: ASTM A351. CF8M (316) contains molybdenum for improved pitting and crevice corrosion resistance. CF3M (316L) is the low-carbon version for welded construction where intergranular corrosion is a concern.
Material of Construction
| Part Name | Material |
|---|---|
| Body | A351-CF8M (Stainless Steel 316) |
| Trim | SS316 |
Reference: DIN 3356, DIN 3202, DIN 3230. Materials may vary by model and pressure rating. Contact us for confirmed material certificate.
Typical Applications of A351-CF8M Stainless Steel Globe Valve
• Chemical processing: corrosive media handling where CF8M (316) provides resistance to acids, alkalis, and chlorides.
• Petrochemical and oil & gas: process lines requiring reliable flow regulation and corrosion resistance.
• Water treatment and desalination: pump discharge, bypass, and flow control in water and wastewater systems.
• Power generation: auxiliary systems, cooling water, and steam lines with moderate corrosion concerns.
• Pharmaceutical and food: hygienic service with clean stainless steel surfaces.
• Marine and offshore: CF8M offers better chloride resistance than CF8, suitable for coastal and offshore applications.
FAQ - A351-CF8M Stainless Steel Globe Valve DIN PN16
Q1: What is A351-CF8M stainless steel?
A: A351-CF8M is a cast austenitic stainless steel equivalent to AISI 316 wrought stainless steel. It contains molybdenum (2-3%) which significantly improves resistance to pitting and crevice corrosion, especially in chloride-containing environments. It is the most widely used cast stainless steel for industrial valves in chemical, petrochemical, and marine applications.
Q2: What is the difference between CF8M and CF8?
A: CF8 is the cast equivalent of 304 stainless steel (18Cr-8Ni), suitable for general corrosive service. CF8M is the cast equivalent of 316 stainless steel (18Cr-10Ni-2Mo) with molybdenum for improved chloride resistance. CF8M is preferred for chemical processing, marine, and petrochemical applications where chlorides are present.
Q3: What is the difference between CF8M and CF3M?
A: CF8M (316) has a maximum carbon content of 0.08%, while CF3M (316L) has a maximum carbon content of 0.03%. The lower carbon in CF3M prevents chromium carbide precipitation during welding, making it more resistant to intergranular corrosion. CF3M is preferred for welded valve bodies and severe corrosive environments.
Q4: What is the difference between a globe valve and a gate valve?
A: A globe valve uses a plug that moves along the flow axis, providing better throttling and flow regulation — ideal for modulating service. A gate valve uses a wedge that moves perpendicular to the flow, providing full bore flow with minimal pressure drop — ideal for on-off isolation only. Globe valves should be used for throttling, while gate valves should only be used fully open or fully closed.
Q5: What is BS 1873 standard?
A: BS 1873 is a British Standard for "Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical, and allied industries." It specifies requirements for cast or forged carbon and alloy steel outside screw and yoke globe valves, straight pattern, angle pattern, and Y pattern, in sizes DN15 to DN400 (½″ to 16″) and Classes 150 to 2500.
Q6: What is DIN 3356 standard?
A: DIN 3356 is a German industrial standard for "Globe valves for general requirements." It specifies requirements for design, materials, face-to-face dimensions, flange dimensions, and testing of industrial globe valves. It is widely used in European and international projects for flow regulation and throttling applications.
Get a Fast Quote for A351-CF8M Stainless Steel Globe Valve
Send us your size (DN50 – DN450), pressure rating, material grade (CF8 / CF8M / CF3M), end connection, actuation type, and quantity. Our team will reply within 24 hours with price, drawing, and delivery time.
Email: sales@tengsvalve.com
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