Thermal power station pipeline contractors, heating system manufacturers and petrochemical plant equipment buyers always face two core troubles when selecting large-diameter cut-off valves for high-temperature steam pipelines.Most stainless steel ball valves on the market have a maximum continuous working temperature limited to 300℃. If they are used on heat-conducting oil and superheated steam pipelines above 300℃, the valve body and sealing parts will age rapidly, triggering frequent leakage and unplanned production shutdowns. Besides, many ordinary carbon steel ball valves do not reserve ISO5211 unified mounting bases on the top. When factories need to upgrade to automatic control later, they need customized transition brackets, which increases extra procurement and construction costs.This DN100 WCB cast steel high platform flanged ball valve solves both pain points at once. Clients who have deployed this valve on boiler auxiliary pipelines, central heating trunk lines and heavy oil delivery systems mention that WCB carbon steel material maintains stable mechanical performance under long-term high temperature up to 425℃. The integrated ISO5211 top platform supports direct assembly of electric and pneumatic actuators without secondary processing. The two-piece split body design allows maintenance teams to replace damaged sealing seats without removing the whole valve from large DN100 pipelines, effectively cutting downtime losses caused by equipment overhaul.
1. Full Set Industrial Standard for Design, Production & Inspection
This WCB carbon steel flanged ball valve strictly follows a complete set of national industrial standards covering design, structural length, flange connection and factory pressure test. All standards are accepted by third-party testing laboratories and global export customs authorities:
• Shell & Seat Tightness Test Standard: GB/T26480Our factory has full production lines including precision casting, CNC machining, rust-proof sand blasting and hydrostatic testing. Every finished DN100 ball valve passes shell strength test and high-pressure sealing test before delivery. Material certificates, pressure test reports and dimension drawings can be supplied for overseas project bidding and customs clearance documents.
2. Complete Optional Material Matching for All Components
Multiple material collocations are available to match different temperature, pressure and medium requirements, all raw materials come with traceable quality certification:
Graphite Composite Gasket / Metal Spiral Wound Gasket
Bolt & Nut Fasteners
35# Carbon Steel / 304 Stainless Steel
Manual Operating Handle
QT450 Ductile Iron / Cast Steel
3. Structural Dimension Parameter Definition
• L: Total flange-to-flange length of valve body, unified per GB/T12221 standard
• H: Overall total height of complete ball valve
• A: Mounting height of ISO5211 standard high platform on valve top
• Φd: Outer diameter of flange; Φd1: Flange sealing surface diameter; Φd2: Full port inner bore diameter
• n-Φh: Flange bolt quantity & bolt hole diameter
• T: Flange thickness; f: Height of flange sealing surface bossFull-port straight flow channel reduces fluid resistance and avoids viscous medium accumulation. Multi-layer flexible graphite packing plus limit anti-blowout stem design prevents high-temperature steam ejection leakage. Two-piece split body allows on-site disassembly and seal replacement without pipeline cutting.
Standard Pressure & Temperature Performance Specification
Three pressure grades can be customized, all test pressure values strictly implemented in accordance with GB/T26480 inspection rules:
Performance Item
PN1.6 (1.6MPa)
PN2.5 (2.5MPa)
PN4.0 (4.0MPa)
Nominal Working Pressure
1.6MPa
2.5MPa
4.0MPa
Shell Hydrostatic Test Pressure
2.4MPa
3.75MPa
6.0MPa
High Pressure Seat Tightness Test Pressure
1.76MPa
2.75MPa
4.4MPa
Applicable Medium
Saturated & superheated steam, heat conduction oil, heavy fuel oil, clean industrial water, non-corrosive gas
Continuous Operating Temperature Range
-20℃ ~ 425℃
Global Industrial Application Scenarios
1. Thermal Power & Central Heating ProjectsMain pipeline cut-off valve for boiler auxiliary pipelines, municipal heating trunk lines, heat exchange station equipment. WCB carbon steel withstands long-term high-temperature steam above 300℃, far better than stainless steel valves in high-temperature stability.
2. Petrochemical & Heavy Oil Delivery SystemsOn-off control for crude oil, heavy fuel oil, heat conduction oil transportation pipelines, suitable for dry, non-acid-base industrial production environments.
3. Industrial Furnace & High Temperature Gas PipelinesSwitch valve for high-temperature flue gas, heating furnace circulating pipelines, stable structure under high temperature and medium pressure.
4. Factory Steam Circulation SystemWorkshop steam supply main pipe cut-off equipment, ISO5211 platform supports later automation upgrade without valve replacement.
5. Large-Scale Industrial Pipeline Automation RenovationReserved standard high mounting base matches all mainstream electric and pneumatic actuators, ideal for DN100 large-diameter automatic control transformation of old factories.
6. Non-corrosive Clean Water Circulation PipelinesIndustrial circulating cooling water, boiler feed water pipelines, cost-effective choice for indoor dry working conditions.
Core Trustworthy Product Advantages
1. WCB Cast Steel Body with Excellent High Temperature ResistanceMax continuous working temperature up to 425℃, mechanical strength will not decline under long-term superheated steam and heat conduction oil medium, solves the high-temperature aging defect of stainless steel valves.
2. ISO5211 Integrated Standard High PlatformUniversal international actuator mounting interface, direct installation of electric/pneumatic actuators without custom transition brackets, saves renovation cost for automatic control.
3. Two-Piece Split Body for Easy Large Pipeline MaintenanceOnly loosen connecting bolts to split valve body, maintenance workers can replace worn graphite and PTFE seals without cutting DN100 large pipelines, reduce overhaul downtime.
4. Optional Multi-Type Sealing ConfigurationsPTFE soft seal for medium and low temperature clean medium; RPTFE reinforced PTFE or metal hard seal for working temperature above 300℃, flexible matching for different thermal conditions.
5. Complete Size & Pressure Customization SupportFull DN range DN15-DN200, PN16/PN25/PN40 three pressure grades available, support OEM logo engraving and customized special anti-high temperature accessories.
