dot dot
bulletHeat Recovery Steam Generation (HRSG)
bulletCooling Tower
bulletNGV Completed Solutions
Sign up for News Updates


V1-1 article

Applied Reliability

The V1-1 seat delivers reliability cycle after cycle.  Its integral seat means leakage simply has no place to go. Every valve is tested with both water and nitrogen for three minutes, with zero bubbles, to assure that it’s delivering the ValvTechnologies Zero Leakage Guarantee to your application. It’s self-relieving, due to high-strength Belleville springs.

This forged model’s non-pinned stem is blowout-proof for even greater safety on the job.  A choice of RAM® hard coatings improved wear resistance over ordinary pressure valves.

Key Benefits

  • Long-life service reduces maintenance in hard-to-access locations
  • Order in sizes from ¼ to 4 inch to match the need and the location
  • Available in ASME/ANSI pressure classes 900 to 4500 for precise choice
  • Proven sealing under every operating condition up to 1400°F (760°C)
  • Seat leak paths eliminated with integral metal downstream seat

Design Features

  1. Integral Metal Seat. With our patented Ceramet and Rocket Applied Metallic (RAM) coatings, the integral seat in ValvTechnologies’ rotary operating valves are resistant from the attack of abrasive magnetite or ferrous oxides in the steam flow.
  2. Body Seal Ring. ValvTechnologies employs a field proven seal ring technology to ensure sealing under all operating conditions, up to 1400o F. The body seal ring is loaded at a pressure higher than 20,000 psi. In addition, valves sized 3 inch and above contain a secondary Grafoil seal to further guarantee reliability
  3. Patented Coating Process. The sealing surfaces are overlaid with Tungsten or Chromium Carbide using our exclusive RAM® process. These surfaces have a hardness of 68 - 72 Rc to allow long periods of operation in the most severe conditions.
  4. Live Loaded Gland Area. The V1 Series 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.
  5. Blow-out Proof Stem. ValvTechnologies design utilizes a one piece, hard-faced, blow-out proof stem that is inserted through the inside of the body cavity eliminating the possibility of blow-out through the gland area.



Technical Data


¼ - 4 inches

Pressure Classes

ASME / ANSI Class 900 - 4500

Materials of Construction

Carbon Steel (A105) - standard Alloy Steel (F22, F91) - standard Stainless Steel (316H) - standard Duplex Steel Exotic Alloys Other materials available upon request

In Compliance

ASME B16.34 PED N & NPT – Nuclear Authorized

End Connections

Socketweld – standard Buttweld – standard Other end connections available upon request


Oval hand wheel Actuator mounting



V1-2 article
V1-3 article
V1-4 article

Copyright @ 2013 IMI Industries Company Limited