HIGH PERFORMANCE

Multi Purpose IVEX Range

The inter valve IVEX-Range is based on a unique quarter-turn design. The double offset shaft and disc configuration to the seat together with the advanced high technology seat systems brings in a multipurpose IVEX-butterfly range.

Main Design Features

• Double offset disc design.
• At the initial point of disc opening, the double offset disc provides a cam-like action. Thus preventing excessive seat wear and creating the possibility for frequent operation.
• Sizes range from 2″ to 48″
• Class 150 & 300 lbs.
• Body design can be lug (single flanged) and wafer design
• Asbestos free design
• Metal header prevents cold flow of packing and centers the disc exactly in the seat (trust bearing)
• Metal to Metal seat for high temperature service
• Reinforced PTFE seat-ring with secondary metal seat for fire-safe protection
• Seat removal without disassembly of shaft and disc
• Body insert protects seat from abrasion and erosion
• Grafoil seal-ring & packing
• Shaft bearing in PTFE or AISI 316
• 2 Piece stem for extra flow
• The IVEX Valves will be supplied with an actuator bracket according to ISO 5211, which allows replacement of the stem seals without removal of the actuator
• Power Seal Valve Produces the IVEX range in three main executions:
• IVEX T: PTFE Seat System
• IVEX F: PTFE Metal seat system, bidirectional sealing and fire safe design
• IVEX M: Metal to metal seat system for high temperature service
• PTFE-Seat system
• In the preferred flow-direction, the PTFE- Seat system will bring its optimum performance. In this design, the line pressure act as a positive force in the seat-system even at fluctuating working condition. The seat ring is well protected by the valve-body, thus preventing distortion at a negative, non-preferred flow direction.
• PTFE-Metal Seat system
• Bi-directional sealing and fire safe design
• Bi-directional
• The primary PTFE- seat ring will be replenished with a secondary metal back up ring. This metal seat provides a mechanical load to energize the PTFE- seat. In combination with the line pressure a Bi-directional sealing against the design pressure is obtained.
• Fire Safe
• After a fire, when the PTFE- seat ring has burned away, the secondary metal seat gives bi-directional sealing. This sealing system meets the fire test requirements API 607 and BS5146.
• Metal to Metal Seat
• High Temperature service
• The primary metal seal enables this execution to be used up to 670 grade C. Seat- rings available are stainless steel ANSI 316 L-chromium plated, (maximum allowed temperature: 310 grade C) and Inconel 625 (maximum allowed temperature: 760 grade C). As a result the IVEX M-Metal to Metal range meets the full pressure temperature rating according to the ANSI class 150 and class 300 rules.