Heavy Pattern Cast Iron Globe Valve
Heavy Pattern Cast Iron Globe Valve - Image 2
Heavy Pattern Cast Iron Globe Valve - Image 3

Heavy Pattern Cast Iron Globe Valve

Categories: ,

Description

CAST IRON GLOBE VALVE – TECHNICAL DATASHEET

Design & Manufacturing Standard: MSS SP-85
Supporting Standards: ASME B16.34, MSS SP-25, MSS SP-55, API 598

PARAMETER SPECIFICATION
Valve Type Globe Valve (Bolted Bonnet, Outside Screw & Yoke – OS&Y)
Size Range 2″ to 24″ (DN50 to DN600)
Pressure Rating Class 125 / 150 (PN16/PN20)
Body/Bonnet Material Gray Iron: ASTM A126 Class B
Ductile Iron: ASTM A395 (Optional)
Trim (Standard) Disc & Seat: Bronze (C83600)
Stem: Bronze (C36000) or SS410
Trim (Optional) Disc & Seat: SS304/SS316
Stem: SS304/SS316 (ASTM A276)
Seat Seal Type Standard: Metal-to-Metal
Optional: PTFE or Flexible Graphite Insert
End Connections Flanged: ASME B16.1 Class 125/150
Face-to-Face: ASME B16.10
Bonnet Joint Bolted (ASTM A307 Bolts)
Gasket: Spiral Wound SS/Graphite (MSS SP-44)
Pressure Testing Shell Test: 1.5 × Class Rating
Seat Test: 1.1 × Class Rating (Per API 598)
Seat Leakage Class IV (MSS SP-61) / Class VI Optional (Zero Leakage)
Temperature Range Standard: -29°C to 232°C (-20°F to 450°F)
With Graphite Seal: ≤454°C (850°F)
Operation Handwheel (Rising Stem, OS&Y)
Gear Operator (Mandatory for ≥10″)
Design Compliance Wall Thickness: Per MSS SP-85 Appendix A
Flange Drilling: ASME B16.1
Quality Control MSS SP-55 (Visual Inspection)
Liquid Penetrant Testing (Critical Castings)
Applications Steam, Hot Water, Non-corrosive Gases/Oil, HVAC Systems

KEY FEATURES PER MSS SP-85

  • Structural Integrity: Body minimum wall thickness calculated per Appendix A of SP-85.

  • Interchangeability: Face-to-face dimensions comply with ASME B16.10.

  • Sealing Reliability: Metal seat design ensures stability in thermal cycling; Optional soft seats for bubble-tight shutoff (Class VI).

  • Bonnet Safety: Bolted joint with controlled torque sequence to prevent overloading iron components.

  • Stem Guidance: Renewable brass bushings in yoke to prevent galling (Sec. 5.4 of SP-85).

CRITICAL NOTES

  1. Material Restriction: Cast iron valves shall not be used in:

    • Piping systems subject to water hammer or thermal shock (SP-85 Sec. 8.1).

    • Corrosive fluids (pH <6.5 or >8.5) or hydrocarbon services below -29°C.

  2. Pressure-Temperature Limits: Max. operating pressure derated per ASME B16.34 for temperatures >120°C (248°F).

  3. Installation Warning: Support piping near valve – avoid using valve as pipe hanger (SP-85 Sec. 8.3).

  4. Certification: Manufacturer must provide certification of compliance with MSS SP-85 (Marking per MSS SP-25).

*For sour service (H₂S environments) or cryogenic applications, use ductile iron/steel valves meeting NACE MR0175/ISO 15156.*

Marking Requirement (Per MSS SP-25):
SP-85 | CLASS 150 | DN300 | WCB | ↑↓ | [MFG ID] | HEAT NO.

Related products