American standard gate valve _ American standard globe valve

The following is a comparative analysis of American standard gate valves and American standard globe valves, combined with technical parameters, application scenarios, and market data:

1、 Product Definition and Standards
American standard gate valve
Compliant with API 600 standard, using flange connection (ASME B16.5), pressure rating covering Class 150-2500 (1.9-76MPa), with a diameter range of 2 "to 48".
Fully open/fully closed control is achieved through vertical lifting of the gate, with low flow resistance but not suitable for flow regulation.
American standard globe valve
Following ANSI B16.34 and API 600 standards, pressure rating Class 150-4500, diameter NPS 1/2-24 (DN15-600).
The valve disc rises and falls along the centerline of the valve seat, with both cutoff and flow regulation functions, but with high flow resistance.
2、 Core performance comparison
Features: American standard gate valve, American standard globe valve
Sealed structure wedge-shaped elastic gate plate+Stellite alloy overlay metal hard seal or soft hard composite seal
Operating torque ≤ 800N · m (DN20) requires higher torque (due to flow channel design)
Applicable temperature -40~593 ℃ (chromium molybdenum steel) -196~649 ℃ (depending on the material)
Leakage level API 598 Zero leakage API 598 Low pressure gas seal No bubbles
3、 Materials and processes
Gate valve
Valve body/gate: Chromium molybdenum steel (A182 F11/F22) or duplex steel, hard alloy sealing surface hardness ≥ HRC60.
Valve stem: quenched and tempered+nitrided treatment, improved corrosion resistance.
Globe valve
Valve body: A105 carbon steel/F304 stainless steel/F11 chromium molybdenum steel, sealing surface roughness ≤ Ra0.8 μ m.
Packing: flexible graphite or PTFE, with cover bolts tightened to prevent leakage.
4、 Suggested application scenarios
Prioritize gate valves
A system that requires full open and full closed operation and is sensitive to flow resistance (such as long-distance pipelines).
Containing granular media (the gate can scrape the sealing surface).
Prioritize the selection of shut-off valves
Frequent adjustment of flow or high pressure differential conditions is required (such as steam systems).
Low temperature (-196 ℃) or ultra-high temperature (>593 ℃) environment.

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