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KSB Cast Stainless Steel Globe Valve Class 150/300/600

A351 CF8 (SS 304) and CF8M (SS 316) body materials for corrosion-resistant service. BS 1873, bolted bonnet. Suitable for chemical, pharmaceutical, food processing, and cryogenic applications up to 537°C.

Stainless Steel CF8/CF8MClass 150, 300, 600NPS 2–10 (DN 50–DN 250)IBR Certified

Specifications

ParameterSpecification
SeriesSICCA 150-600 GLC
Body MaterialA351 CF8 (SS 304) / A351 CF8M (SS 316)
Pressure ClassClass 150, 300, 600
Size RangeNPS 2–10 (DN 50–DN 250)
Max Temperature537°C (1000°F)
Max Pressure99 bar (1440 psi)
Design StandardBS 1873
End ConnectionsFlanged RF/RTJ, Butt Weld
Bonnet DesignBolted bonnet, outside screw & yoke
TrimMatching SS 304/316 trim with Stellite option
IBR CertifiedYes
✓ Stellite Hard-Faced Seats✓ IBR Certified✓ BS 1873

Material & Applications

Why Stainless Steel CF8/CF8M: CF8 (SS 304 casting) offers excellent general corrosion resistance. CF8M (SS 316 casting) adds 2–3% molybdenum for superior resistance to pitting, crevice corrosion, and chloride attack. Choose CF8 for general chemical service, CF8M for chloride-containing or marine environments.

Typical applications: Chemical plants, pharmaceutical manufacturing, food processing, seawater/marine, LNG/cryogenic, and any application requiring corrosion resistance. CF8M (316) adds molybdenum for pitting and chloride resistance. Both grades suitable up to 537°C with carbon content ≥0.04%.

Pressure/Temperature Ratings

Permissible operating pressures per ASME B16.34:

RatingPermissible Operating Pressure at Temperature
CF8 — 150-29 to 38°C: 19 bar204°C: 13 bar316°C: 10 bar537°C: 1 bar
CF8 — 300-29 to 38°C: 50 bar204°C: 34 bar316°C: 30 bar537°C: 24 bar
CF8 — 600-29 to 38°C: 99 bar204°C: 69 bar316°C: 61 bar537°C: 49 bar
CF8M — 150-29 to 38°C: 19 bar204°C: 13 bar316°C: 10 bar537°C: 1 bar
CF8M — 300-29 to 38°C: 50 bar204°C: 36 bar316°C: 31 bar537°C: 25 bar
CF8M — 600-29 to 38°C: 99 bar204°C: 71 bar316°C: 62 bar537°C: 50 bar

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Other Globe Valve Materials

Carbon Steel WCB — Class 150/300/600 Alloy Steel WC6 — Class 150/300/600 Forged SS F304/F316 — Class 800 All Globe Valves →

Service & Spares

Seat lapping, packing replacement, and genuine KSB spares for globe valves.

Repair Service → Genuine Spares →

Service Area

Pune, Ahmednagar & Beed, Maharashtra.

Stainless Steel CF8/CF8M Globe Valve FAQs

What is the difference between CF8 and CF8M?
CF8 is the cast equivalent of wrought SS 304 (18Cr-8Ni). CF8M is the cast equivalent of wrought SS 316 (18Cr-10Ni-2Mo). The key difference is molybdenum — CF8M contains 2–3% Mo which provides superior resistance to pitting corrosion and chloride attack. For chloride-containing fluids, seawater, or chemical environments with halides, always specify CF8M.
Can stainless steel globe valves be used for steam?
Yes. Both CF8 and CF8M are suitable for steam service up to 537°C, provided the carbon content is 0.04% or higher for sustained use above 538°C. However, for standard steam applications, carbon steel WCB (up to 425°C) or alloy steel WC6 (up to 593°C) are more cost-effective choices. Use SS only when corrosion resistance is also required.
What is the pressure rating of CF8M Class 300 at 300°C?
CF8M Class 300 is rated at approximately 31 bar at 316°C. The full P/T curve is available in the ASME B16.34 tables. Note that stainless steel ratings are slightly lower than carbon steel at elevated temperatures due to lower yield strength.
Are these suitable for cryogenic service?
CF8 and CF8M have excellent low-temperature toughness and are suitable for cryogenic applications. The minimum permissible temperature is 0°C per standard rating. For sub-zero temperatures down to -196°C, special impact testing and certification are required — contact us for cryogenic-rated valves.

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