WCB DN600 Worm Gear Hard Seal Flanged Ball Valve | Large Bore Industrial Shut Off Valve ：
Pipeline contractors and plant fluid maintenance supervisors across Southeast Asia, Middle East and Europe frequently share headaches when sourcing ultra-large DN400~DN600 pipeline isolation valves. Ordinary soft-seal ball valves can’t withstand high temperature steam, high-pressure oil and abrasive granular medium; PTFE soft seats deform and leak quickly under sustained high heat above 150℃, forcing frequent full valve replacement and unplanned factory shutdowns.Most cheap large-bore valves also adopt thin-wall casting with weak structural rigidity, which vibrates severely under high-flow medium flushing, accelerating bolt loosening and joint leakage. This DN600 WCB worm gear hard seal flanged ball valve solves these real-site pain points completely.Clients who deployed this model on thermal power boiler main steam lines, crude oil transmission trunk pipelines, municipal heating networks and refinery high-temperature medium pipes said the metal hard-to-hard sealing pair maintains zero leakage stably within -29℃~150℃, even under long-term PN16 full pressure load. The worm gear handwheel reducer amplifies operating torque greatly, so workers can perform smooth 90° open/close operation without heavy labor on DN600 ultra-large bore pipelines. Thickened WCB carbon steel casting body delivers outstanding high-temperature structural stability, with no deformation or vibration during continuous high-speed medium delivery. Full set of GB standard dimension drawings, material certificates and pressure test reports are provided to match local project bidding and customs clearance requirements in each target export region.
This DN600 large bore hard seal ball valve strictly complies with unified Chinese industrial standards recognized by third-party testing institutions and global export customs authorities, all specifications match overseas EPC project procurement acceptance rules:
• Shell & Seat Tightness Inspection Standard: GB/T26480Our factory runs full integrated production lines including WCB precision casting, heavy CNC machining, surface anti-rust coating and full hydrostatic testing. Every finished DN600 ball valve undergoes shell strength test and high-pressure bidirectional sealing test before shipment, all test records are traceable.
Multiple material collocations are available to match different medium temperature, abrasion and corrosion demands, all raw materials carry traceable mill test certificates (MTC):
Standard Pressure & Temperature Performance Specification
3 mainstream pressure grades PN16 / PN25 / PN40 support customized production, all test pressure data strictly executed following GB/T26480 inspection rules:
Global Industry Application Scenarios (GEO Region Targeted)
1. Thermal Power & Central Heating Projects (Europe, Middle East)Main pipeline shut-off valve for boiler auxiliary saturated steam trunk lines, municipal district heating large-bore networks. WCB carbon steel high temperature resistance & metal hard seal eliminate high-temperature steam leakage risk, worm gear slow switch prevents pipeline water hammer.
2. Oil & Gas Refinery Transmission Pipelines (Middle East, Southeast Asia)Isolation valve for crude oil, heavy fuel oil, high-temperature oil product delivery mains. Hard alloy sealing resists abrasion from impurity particles inside oil medium, stable zero leakage under long-term high pressure.
3. Municipal Industrial Water Treatment Large Trunk Pipelines (Southeast Asia, Europe)DN600 large flow shut-off equipment for factory circulating cooling water, urban industrial water supply networks, thickened cast body avoids vibration under continuous high-flow water impact.
4. Heavy Manufacturing Factory High-Temperature Medium Circulation Systems (All Export Regions)Cut-off valve for metallurgical plant heating circulation pipelines, chemical factory non-corrosive hot fluid delivery trunk lines, wide temperature range adapts variable production working conditions.
5. Large-Scale Energy EPC Engineering Projects (Global Bulk Export)Standard large-bore isolation valve for overseas energy turnkey projects, complete GB standard documents support international project tendering and local customs clearance in Europe, Southeast Asia, Middle East.
1. WCB Thickened Cast Carbon Steel Body, Excellent High Temperature StabilityMax continuous working temperature reaches 150℃, structural rigidity avoids deformation under long-term high-pressure & high-temperature medium impact, far superior to thin-wall cast ball valves.
2. Metal Hard Alloy Surfacing Hard Sealing Pair, Wear Resistant & High Temp ResistantHard-to-hard metal sealing structure solves soft seal valve high-temperature aging & leakage defects, suitable for steam, oil and granular abrasive medium.
4. Full Port Large Cv Flow Channel, Low Pressure LossUnobstructed straight through inner bore minimizes fluid resistance, meets large-volume continuous medium transmission demand for energy and heating projects.
