ASTM A217 WC6 Globe Valve

ASTM A217 WC6 globe valve is a forced seal valve designed for high temperature and high pressure conditions with a chromium-molybdenum alloy steel casting valve body.
‌Valve body and valve cover‌
It is cast with ASTM A217 WC6 chromium-molybdenum steel (containing Cr 1.0-1.5%, Mo 0.45-0.65%), normalized + tempered, and the high temperature strength retention rate is >80% (538℃).
‌Valve disc sealing structure‌:
The conical sealing surface is welded with hard alloy (such as Stellite 6), with a thickness of ≥2mm and a hardness of up to HRC55-60;
The valve disc and the valve stem are rigidly connected through a T-slot to prevent high pressure impact from falling off.
‌Transmission and sealing system‌
The valve stem is forged with chromium-molybdenum steel, and the surface is nitrided to enhance wear resistance;
Flexible graphite + stainless steel winding packing, temperature resistant to 550℃ and meets ANSI VI grade sealing standards.

• Pressure rating: Class 150-1500 (PN10~420);
• Applicable temperature: -29°C ~ 570℃ (short-term peak 593℃);
• Nominal diameter: DN15~DN200 (casting process limitation);
• Sealing standard: Pass API 598 high pressure test (zero leakage);
• Connection method: Flange end complies with ASME B16.5, socket welding/butt welding optional.

 

ASTM A217 WC6 Globe Valve in stock

 

Applications

‌Petroleum refining‌: Hydrogenation reactor inlet and outlet pipelines (pressure Class 1500, temperature 538℃);
‌Thermal power generation‌: Supercritical unit main steam pipeline (pressure PN160, temperature 566℃);
‌Chemical synthesis‌: Methanol/ammonia synthesis tower high temperature medium cut-off (anti-hydrogen embrittlement corrosion);
‌Nuclear power auxiliary system‌: High temperature feed water regulation loop (radiation oxidation resistance).

Advantages‌

Long-term safety‌
The chromium-molybdenum steel body has no casting defects, and the bursting pressure is ≥4 times the rated pressure;
The fireproof design complies with API 607 ​​and can still maintain sealing after a fire.
‌High economic efficiency‌
The high temperature working life is >10 years, reducing the frequency of shutdown maintenance;
The full-bore (Full Port) design reduces flow resistance by %, saving pumping energy consumption.
‌Easy maintenance‌
The top-mounted bonnet design supports online replacement of sealing components;
Standardized valve stem/seal ring spare parts, high interchangeability.

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