Views: 0 Author: J-VALVES Publish Time: 2026-06-05 Origin: Site
Standard triple eccentric butterfly valves cannot adapt to special piping layout, extreme temperature and high-pressure working conditions in petrochemical, coal chemical, thermal power and oil & gas processing industries, making custom triple offset butterfly valves the optimal choice for shut-off and throttling on heavy-duty industrial pipelines. Based on finished workshop photos of 28” and 34” Class900 WCB triple eccentric butterfly valves, this article introduces core customization advantages of J-VALVES and verified overseas project cases to support global buyers’ valve procurement.
As an integrated valve manufacturer with self-owned foundry, precision CNC machining workshop, independent seal R&D department and full-test lab, J-VALVES differs from valve trading companies without production capacity. Equipped with heavy-duty boring machine, vertical lathe and heat treatment line, we complete full in-house production for oversized 28” & 34” Class900 high-pressure butterfly valves, covering custom design, casting, machining, assembly and API598 leakage test. Our finished Class900 WCB butterfly valves adopt ASTM A216 WCB precision cast body with normalized heat treatment to eliminate casting stress and prevent body deformation under high pressure. Both RF raised face and RTJ ring joint flange can be customized as required, while Stellite hardfaced metal seat is optional for high-temperature, abrasive or H₂S-containing harsh medium.
After clients submit working condition details including medium temp, nominal pressure, pipe size and actuator dimension, our engineering team calculates wall thickness and triple offset structure parameters, delivers 2D drawings and 3D models in 24 hours. For 34IN Class900 heavy-duty custom valves, we thicken body wall per ASME B16.34 and optimize trunnion design to avoid deformation and leakage under high fluid pressure.
Besides standard ASTM A216 WCB carbon steel, CF8/CF8M stainless steel, WC6/WC9 alloy steel and NACE anti-sulfur steel are available for corrosive, high-temperature or cryogenic working services to match all kinds of industrial medium.
Custom non-standard RTJ groove or RF flange processing; two sealing solutions: hard metal seal for high temp high pressure service and composite soft seal for general corrosive medium; customized top drive connection size to perfectly fit customers’ existing pneumatic, electric, hydraulic or manual gear actuators without on-site pipeline modification.
All custom triple eccentric butterfly valves pass API598 hydrostatic and air tightness test, supported with CE, ISO and API certificates for global market export. In-house production cuts manufacturing cycle by over 25% compared with outsourced foundry suppliers to guarantee on-time delivery for worldwide projects.
Original imported triple eccentric butterfly valves suffered frequent seat leakage and thermal deformation on 380℃ heat transfer oil pipeline. J-VALVES supplied customized 28” &34” Class900 WCB triple offset butterfly valves with full Stellite hardfaced sealing and reinforced valve body. The customized valves run continuously for 3 years with zero leakage and help customer reduce total procurement cost by 32%.
Existing pipeline features special deep-groove RTJ flange which cannot match standard stock butterfly valves. J-VALVES revised flange machining drawing and customized body connection dimension according to field measurement, all valves finish one-step installation without rework and ensure smooth project commissioning.
The pipeline contains hydrogen sulfide corrosive gas at 320℃. Instead of expensive European imported valves, plant owner selected J-VALVES custom NACE heat-treated WCB body plus full metal sealing triple eccentric butterfly valves. Our customized valves pass full third-party inspection with 40% cost saving vs imported alternatives.
Never use Class150 standard body for Class900 high-pressure application; customized thickened body wall is necessary for pressure resistance;
RTJ flange + metal hard seal is recommended for high temp heavy oil and steam service; RF flange + soft composite seal works for normal water and common gas to control purchase cost;
Submit complete working condition parameters before customization to avoid improper specification and subsequent production loss.
