product

Trunnion Nextech R

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Technical Data
Sizes
2 – 42"
Pressure Classes

ASME / ANSI Class 300 – 900

Materials of Construction

Carbon steel (A352 LCB) – standard
Stainless steel (A351 CF8M) – standard
Duplex steel
Exotic alloys
Other materials available upon request

In Compliance

ASME B16.34
API 6D
API 607
NACE MR-01-75/ISO 15156
NACE MR-0103
ISO 15848-1, Fugitive Emissions
PED
SIL-3

End Connections

ANSI raised-face flange – standard
ANSI ring type joint flange – standard
Other end connections available upon request

Shutoff

Inconel 625 & Incoloy overlay on seat pockets and stem area
Complete body overlay
Bleed ports
Sealant injection ports
Body cavity drain and vent ports
Double-piston effect seats
Actuator mounting

The Next Generation in Trunnion Technology

The cost-efficient, side-entry NexTech® R is in stock and ready for tough duty, leak prevention and increased productivity.  It has been engineered to resist abrasion and corrosion using diamond mate-lapped tungsten/chromium carbide coatings via our proven HVOF RiTech® process on sealing surfaces. You get bubble-tight shut-off, low operating torques – even with low differential pressures – and long periods of effective operation. That capability is reinforced using seal surfaces with the highest possible integrity.

Design Features

ValvTechnologies’ low pressure, trunnion-style, metal-seated ball valve incorporates many of the features of the traditional integral seat design into a lower-torque, bi-directional valve. The Nextech® R features a readily adjustable stem sealing design with a four-stud, live-loaded, industrial-grade packing gland assembly and offers diamond mate-lapped tungsten or HVOF RiTech™ coating on sealing surfaces. The Nextech® R is available in a variety of end connections to meet customer’s specifications.

    1. Live Loaded Gland Area. Nextech® R’s gland packing design features a four stud, live-loaded assembly designed for heavy industrial applications. The packing material is high purity Grafoil® surrounded by Carbon Fiber / Inconel anti-extrusion rings. The six Bellville springs (per stud) provide constant load pressure through extreme thermal shocks and prevent wear leaks in high cycle service.
    2. Carbide Sealing Surfaces. The sealing surfaces are overlaid with tungsten or chromium carbide using our exclusive HVOF RiTech™ process. These surfaces have a hardness of 68 – 72 Rc to allow long periods of operation in the most severe conditions.
    3. High Integrity Seat Surfaces. To prevent leaks around the seats, ValvTechnologies has developed an innovative double seal design for high temperature operation and/or high cycling applications. In low temperature, high cycling service, a secondary elastomer seal is installed on the seat perimeter
    4. Solids Resistance. In addition to the carbide coatings which will allow the valve to function in highly abrasive applications, the individual valve parts have additional seals to prevent interference from solids in the system. This provides for outstanding performance in catalyst systems, streams with solids contamination and polymers.

  • Heavy-duty service assured with four-stud, live-loaded packing assembly
  • Two-piece side-entry body offers proven weight and space savings
  • Optimized 2 to 24″ sizing offers flexibility in operating regimes, locations
  • Outstanding performance in catalyst systems, polymers and stream with solids contamination

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