Views: 0 Author: J-VALVES Publish Time: 2026-10-01 Origin: Site
For heavy‑duty industrial projects including oil refineries, natural gas transmission, power plants and coal‑to‑chemical facilities, 28‑inch Class 900 represents a large‑bore high‑pressure pipeline condition. Conventional gate valves and standard butterfly valves often suffer from excessive operating torque, seat abrasion, internal leakage and high maintenance cost under bidirectional pressure differential and high‑temperature service.
The 28" 900LB WCB triple offset metal‑seated butterfly valve is engineered per authoritative standards API 609, ASME B16.34 and API 598. Cast WCB carbon steel body is structurally reinforced for harsh high‑pressure piping, delivering bidirectional metal‑to‑metal tight shut‑off for both isolation and throttling service. It acts as a lightweight reliable alternative to bulky large‑size gate valves.
Since 2009, J‑VALVES has specialized in heavy‑duty industrial valves. Complete units of 28" Class 900 triple offset butterfly valves are fully assembled in‑house as shown in workshop photos. Every valve undergoes full shell hydro‑test and seat leakage test before shipment to guarantee long‑term on‑site performance.
Thanks to three‑dimensional offset geometry, disc and metal seat keep separated during 0‑89° stroke, making contact only at full closure. This design drastically reduces operating torque and extends sealing service life, achieving bidirectional bubble‑tight shut‑off to ANSI Class VI and solving leakage risk caused by frequent operation under high pressure.
Body material ASTM A216‑WCB cast carbon steel, pressure rating Class 900, operating temperature range from ‑29℃ up to 425℃. Suitable for steam, crude oil, natural gas and process fluid. Flange dimensions follow ASME B16.5 for correct high‑pressure piping mating.
Manual worm‑gear operator is standard for this large‑size 900LB model. Electric or pneumatic actuators are available on request. High‑strength anti‑corrosion stem material is adopted. Fire‑safe construction complying with API 607 can be supplied for refinery and oil‑gas hazardous service.
This 28‑inch 900LB triple offset butterfly valve is widely adopted in:
‑ High‑pressure isolation for oil & gas transmission pipelines and gathering stations
‑ High‑temperature process lines for refinery & hydro‑processing units
‑ High‑pressure steam systems for thermal power & nuclear power plants
‑ Coal‑to‑chemical and heavy chemical process piping
‑ Off‑shore platform energy‑related projects
Note: For Class 900 large‑bore valves, confirm process temperature, bidirectional differential pressure and flange standard before final selection to avoid specification mismatch.
Founded in 2009, J‑VALVES manufactures API‑compliant industrial valves with full‑cycle quality control for large‑size high‑pressure triple offset butterfly valves:
1. Spectroscopic inspection for incoming WCB castings
2. Shell strength test and bidirectional seat leakage test per API 598
3. Complete unit assembly and gear operator adjustment before ex‑factory inspection
4. Custom options: special seat material, upgraded stem alloy, fire‑safe design, SIL‑capable configuration
If you are seeking proven triple offset butterfly valve solution for your 28" 900LB high‑pressure pipeline project, contact J‑VALVES for complete drawings, technical datasheet and commercial quotation.
