Globe Valve
Forged Globe Valve
Specification
Pressure Rating
Class 150 – 2500 (PN16 – PN420)
Body Material
A105 / A350 LF2 / A182 F11 / F22 / F304 / F316 / F316L / F51
Disc Material
SS410 / SS316 / Stellite Overlay
Seat Material
13Cr / Hard Facing
Size Range
DN15 – DN600 (½" – 24")
Manufacturing
Casting / Forged
Operation
Handwheel / Gear / Electric / Pneumatic actuator
End Connections
Flanged / Butt-weld / Socket-weld
Details
In the picture is a forged globe valve, DN100 Class 25, body material marked F11 (A182 F11 — Chrome Moly alloy steel), blue epoxy coated. F11 is specified for high-temperature service — typically steam lines, boiler feed, and process piping operating above 400°C where carbon steel loses mechanical strength. OS&Y rising stem with bolted bonnet and packed gland seal. Raised face flanged ends with full bolt circle. Cast iron handwheel. This is a high-temperature critical service valve commonly specified in power plant and refinery EPC projects where chrome moly material is mandatory per piping class.
Globe valves are specified where flow must be throttled and regulated. Their disc-and-seat geometry produces a near-linear flow characteristic, giving precise and repeatable control over flow rate under sustained partial-open conditions without accelerating seat wear. This makes them the standard selection for pressure letdown stations, bypass lines, minimum flow protection circuits, boiler feedwater regulation, and chemical injection service. In high-cycle isolation duty, the seating geometry maintains tight shut-off performance over extended service life, reducing maintenance intervention in critical process lines.
Cast Globe Valves is usually designed for larger bore general and heavy process service — oil & gas, power, and chemical plant piping. Cast body construction suits sustained throttling, pressure letdown, bypass, and high-cycle isolation duty across standard to high-pressure applications. On the other hand, Forged Globe Valves are usually specified for small-bore, high-pressure, high-temperature critical service. Forged body eliminates casting porosity, making them the correct choice for hydrogen service, high-pressure steam, boiler trim, and chemical injection where leakage integrity is non-negotiable. Standard selection for Class 800 and above.
Low Pressure — PN16 / PN25 / Class 150–300
For utility and non-critical process service — cooling water, low-pressure steam, and general plant piping. Cast WCB or ductile iron body with standard trim. Cost-effective for high-volume EPC procurement.
High Pressure — PN100–PN420 / Class 600–2500
For critical process lines, high-pressure steam, wellhead, and reactor feed service. Hard-faced or Stellite-overlay trim for erosive and high-velocity conditions. Forged body standard at Class 1500 and above. Compliant with ASME B16.34 and API 623.