Views: 0 Author: J-VALVES Publish Time: 2026-06-23 Origin: Site
When sourcing industrial trunnion ball valves, buyers prioritize two key factors: in-house production capacity and controllable machining craft. Established in 2009, J-VALVES specializes in high-pressure trunnion ball valve R&D and manufacturing, with a 10,000㎡ independent factory separated into dedicated forging, precision machining, hand lapping, assembly and testing workshops. Combined with real photos of valve forgings and finished assemblies, this article demonstrates our production capacity and full quality control system.
1. Forged Valve Body CNC Machining Workshop (Matching the forging photos attached)
We stock forged body blanks ranging DN50 to DN1200. 5-axis CNC lathes integrally machine flange bolt holes and flow channels with precision up to 0.01mm. Every machined body undergoes MPI & UT non-destructive testing to detect internal forging cracks, with laser-etched material grade, heat number and production serial number for permanent traceability.
Unlike trading companies purchasing outsourced blanks, we forge valve bodies in-house, adjusting forging density to boost burst resistance under ultra-high pressure. All stacked large bore valve bodies waiting for assembly in the pictures are fully forged and machined within our factory.
2. Manual Sealing Lapping & Final Assembly Workshop
Machined ball and seat components are transferred to exclusive lapping stations. Senior technicians with over 10 years experience polish sealing surfaces with professional grinding tools to eliminate machining tool marks, achieving mirror finish for metal hard sealing. Assembly follows step-by-step API 6D bolt tightening standards with uniform preload to prevent gasket leakage under high pressure.
Every finished trunnion valve goes through dedicated test benches: 1.5 times body hydrostatic strength test and 1.1 times seat pneumatic bubble tight test. Full video records of test data are archived, with qualified valves anti-corrosion coated and packaged for shipment.
Direct manufacturer without middlemen, offering better cost performance than valve trading companies for identical quality trunnion valves;
Complete special equipment manufacturing licenses & international API 6D certification, compliant for domestic tender bidding and overseas export;
Annual output capacity of 12,000 high-pressure trunnion ball valves, abundant semi-finished large bore body stock for stable bulk order scheduling;
Global buyers are welcome for on-site factory inspection with full access to all workshops: forging, CNC machining, sealing lapping and pressure testing;
Independent R&D lab develops customized body material and sealing solutions for special corrosive, cryogenic extreme working conditions.
In 2025, J-VALVES supplied bulk Class2500 ultra-high pressure duplex steel trunnion ball valves for an onshore oilfield expansion project in the Middle East, handling high-sulfur crude oil under desert high-temperature environment. We completed full in-house forging, manual hard-seat lapping and fire-safe anti-static assembly. All valves passed SGS third-party API 6D inspection and shipped via full containers. No quality complaints received after delivery, with consistent repeat orders from the client.
Domestic chemical EPC contractors and overseas oil & gas valve traders can book a free guided factory tour to inspect our forged valve body stock, technician sealing lapping craft and full assembly testing process. Free product catalog, project reference portfolio and customized quotation available upon request.
