Description
TECHNICAL DATA SHEET: PN63 MOD-FORGED STEEL GLOBE VALVE
- GENERAL SPECIFICATION
- Valve Type: Bolted Bonnet Globe Valve, Outside Screw & Yoke (OS&Y), Rising Stem
- Operation: Handwheel (Standard), Gear Operator (Optional), Electric/Pneumatic Actuator (Optional)
- Flow Direction: Flow Under Plug (Standard, as per API 602/ASME B16.34)
- Design Code: API 602 / ASME B16.34
- Face-to-Face: ASME B16.10
- Inspection & Testing: API 598 / Shell MESC SPE 77/300
- PRESSURE & TEMPERATURE RATINGS
- Pressure Class: ASME 300 LB (PN 50 Equivalent)
- Max. Working Pressure (MWP): Per ASME B16.34 for Group 1.1 Materials
- Temperature Range:
- Min. Temp: -29°C (-20°F) (Standard)
- Max. Temp: +425°C (+800°F) (For A105, limited by seat material)
- Pressure-Temperature Ratings: As per ASME B16.34 Tables for A105 Material.
- MATERIAL SPECIFICATION (PER ASTM STANDARDS)
- Body & Bonnet: Carbon Steel, ASTM A105 (Forged)
- Stem: Stainless Steel, ASTM A182 F6a (13Cr) or F316, with Hardened Surface
- Disc (Plug): ASTM A105 + Hardfaced Sealing Surface: Stellite 6 (AWS ERCoCr-A) applied by overlay welding. (Minimum 1.5mm thickness after machining).
- Seat Ring: ASTM A105 + Hardfaced Sealing Surface: Stellite 6 (AWS ERCoCr-A) applied by overlay welding. (Integral or welded-in).
- Gasket: Spiral Wound Gasket, Stainless Steel (SS316) Filler + Flexible Graphite Filler, SS316 Inner/Outer Ring. (Alternative: Ring Type Joint (RTJ) per ASME B16.20).
- Bolting: ASTM A193 B7 Studs / ASTM A194 2H Nuts
- Packing: Flexible Graphite (Standard), PTFE or Graphite/PTFE Composite (Optional for lower temps)
- Packing Box: Live-loaded packing gland (Standard) for reliable sealing.
- Yoke: ASTM A216 WCB (Cast) or A105 (Forged)
- Handwheel: Ductile Iron (ASTM A536) or Carbon Steel (AISI 1018)
- CONNECTIONS & SEALING
- End Connections:
- Standard: Raised Face (RF) Flange per ASME B16.5 Class 800.
- Alternative: Ring Type Joint (RTJ) Flange per ASME B16.5 Class 800.
- Face Finish: ASME B16.5 RF Finish (125-250 µin Ra)
- Body-Bonnet Sealing: Spiral Wound Gasket (as above) or RTJ (if specified).
- STELLITE SEALING (CRITICAL FEATURE)
- Sealing Surfaces: Both Disc (Plug) and Seat Ring mating surfaces.
- Material: Stellite 6 (Cobalt-Chromium-Tungsten-Carbon Alloy, ASTM F75 equivalent).
- Application Method: Plasma Transferred Arc (PTA) or TIG Overlay Welding.
- Thickness: Minimum 1.5mm (0.060″) after final machining.
- Hardness: Approx. 40-45 HRC.
- Benefits: Excellent galling resistance, high erosion resistance, good high-temperature strength, superior corrosion resistance compared to base A105.
- DESIGN FEATURES
- Bonnet Joint: Bolted Bonnet (Standard). Welded Bonnet (Optional for severe service).
- Stem Design: Rising Stem, Non-Rotating. Backseat Feature (API 602 Requirement).
- Stem Sealing: Multiple rings of flexible graphite packing, gland follower, live-loading springs.
- Stem Nut: Bronze or CuNi alloy (self-lubricating).
- Leakage Class: Class IV (Metal Seat) per API 598 (Standard). Class V or VI achievable with lapping (Consult Factory).
- Fire Safe Design: API 607 / API 6FA compliant packing & secondary metal seals (Optional).
- TESTING (PER API 598)
- Shell Test: 1.5 x Class Rating Pressure (1200 PSI) with water.
- Seat Test: 1.1 x Class Rating Pressure (880 PSI) with air or water (both directions for globe valve).
- Backseat Test: 1.1 x Class Rating Pressure (880 PSI) with air or water.
- High Pressure Gas Test (Optional): Per customer specification.
- Documentation: Certified Test Reports (CTRs) available.
- MARKING & IDENTIFICATION
- Marked per MSS SP-25 / ASME B16.34. Includes:
- Manufacturer Name or Trademark
- Pressure Class (800)
- Material Designation (A105)
- Size (e.g., 2″ NPS)
- Heat Number (Body/Bonnet)
- “OS&Y” or “RS”
- Unique Serial Number (Traceable)
- Direction of Flow Arrow
- “Stellite Trim” (or Trim Code per API 600/602)
- Tag: Stainless Steel tag with key data.
- PAINTING & PACKING
- External Surface Preparation: Blast cleaned to Sa 2½ (ISO 8501-1).
- Primer: High-quality epoxy primer.
- Finish Coat: Epoxy paint, RAL 7012 (Standard Grey) or customer-specified color.
- End Protection: Plastic or Metal Caps/Blinds suitable for Class 800 pressure.
- Packing: Wooden crate or export-quality plywood case suitable for marine transport.
- OPTIONS
- Gear Operator (Bevel or Worm Gear)
- Electric / Pneumatic / Hydraulic Actuators
- Extended Bonnet/Body for Cold Box or Insulation
- Cryogenic Service Design (-196°C / -320°F)
- Bellows Seal Stem
- Position Indicators (Mechanical/Electric)
- Locking Device
- Special Painting (e.g., Offshore, High Temp)
- NACE MR0175/ISO 15156 Compliance (H2S Service)
- Fugitive Emission Certification (ISO 15848-1, TA-Luft, SHELL SPE 77/312)
GUATANTEE
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.
