Views: 0 Author: J-VALVES Publish Time: 2026-06-26 Origin: Site
Size Range: DN450(18") ~ DN750(30")
Pressure Class:Class 150 (150LB)
Standard Body Material: A216 WCB Carbon Steel (for oil, gas, water, steam without strong corrosion)
Design Standards: API 6D, ASME B16.5, ASME B16.34, GB/T 12236
End Connection: RF Raised Face Flange (mainstream for large bore pipeline, standard for J-VALVES)
Operation: Medium self-operated swing disc to prevent reverse flow
Most procurement engineers ignore three critical points: body wall thickness, disc hard facing, hinge pin anti-corrosion structure, which will shorten valve service life under long-term high flow & pressure. J-VALVES optimized full structure solution for 18-30 inch extra large size.
Long-distance Natural Gas / Coal Bed Methane Pipeline
Medium with tiny dust: WCB body + 316 stainless steel hinge pin + full Stellite hardfaced disc + optional slow-close damper to eliminate water hammer, widely used in Central Asia & South America gas trunk line.
Crude Oil & Refinery FCC Medium
Medium with catalyst particle & high temperature slurry: extra thick body wall, thickened Stellite seat face, bonnet inspection manhole for regular impurity cleaning, referenced million-ton domestic refinery project.
Power Plant Circulating Cooling Water
Ambient clean water: standard WCB body + stainless steel sealing face for cost control, large flow passage reduces pump back pressure loss, suitable for Southeast Asia coal power plant.
High Temperature Steam Pipeline (≤425℃)
WCB max working temperature 425℃, graphite metal spiral wound gasket for fire safe sealing, upgraded high tensile bonnet bolt to avoid flange leakage from high temperature creep.
Standard Reinforced Thick Wall for Large Bore Valve
Body wall thickness 20% thicker than API minimum standard for 18"-30" size, resist instantaneous pipeline pressure surge to avoid body deformation & crack, higher safety factor vs thin-wall cheap valves.
Integral Cast Disc with Stellite Hard Overlay
One-piece casting disc without welding seam, minimum 3mm Stellite 6 overlay layer, erosion & cavitation resistance service life 2-3 times longer than ordinary sprayed disc, cut frequent maintenance cost.
100% Full-Size Hydrostatic & Air Tightness Test
Most manufacturers only do sampling inspection, J-VALVES implement full 100% test for all 18-30" swing check valves: shell hydro test at 1.5 times rated pressure, zero leakage air seal test before delivery.
Free Engineering Drawing & Technical Support
Quick supply 2D CAD drawing, 3D valve model, P&ID symbol, full technical datasheet to assist EPC engineers prepare equipment list & technical tender document.
Global Project Delivery Experience to Avoid Engineering Risk
Rich delivery experience in Middle East, Central Asia, Southeast Asia, South America, familiar with local customs certification & third-party supervision process. Complete English material, NDT, test certificates sorted in advance to shorten project acceptance cycle.
24" 150LB WCB Swing Check Valve for Central Asia Gas Trunk Line: slow-close damper + full Stellite disc to solve compressor shutdown water hammer & reverse flow problem.
30" Class 150 Swing Check Valve for Coal Chemical Circulation Gas Pipeline: extra thick body + inspection manhole for particle-laden medium.
18" 150LB Flange Swing Check Valve for South America City Gas: standard WCB economical model for annual bulk repeat order.
Contact J-VALVES engineer for custom selection solution, quotation and drawing of any 18"-30" Class 150 WCB swing check valve. Please provide medium temperature, pressure, pipeline medium and installation condition for tailored technical proposal.
