Xactrol® Mark III Control Valves

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Technical Data
1/2 - 36 “
Pressure Classes

ASME / ANSI Class 150 – 4500

Materials of Construction

Carbon steel (A105, A216 WCB) – standard
Alloy steel (F22, F91, A217 WC9, A217 C12A) – standard
Stainless steel (316H, A351 CF8M) – standard
Duplex steel
Exotic alloys
Other materials available upon request

In Compliance

ASME B16.34
Nuclear ASME III Class 1, 2 and 3
Nuclear Safety Related – 10CFR50 Appendix B

End Connections

Socketweld – standard
Buttweld – standard
Raised- face flange – standard
Other end connections available upon request

Engineered for Precision.

The Xactrol® Mark III control valve uses a series of stacked discs to dissipate damaging energy upstream of critical internal sealing surfaces.

Xactrol cutaway pic 3

  1. Integral Metal Seat. With our exclusive HVOF RiTech® coating process, 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 1400°F. The body seal ring is loaded at a pressure higher than 20,000 psi. In addition, valves sized 3″ 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 HVOF RiTech® process. These surfaces have a hardness of 68 – 72 Rc to allow long periods of operation in the most severe conditions.
  4. The Xactrol® product group unites ValvTechnologies’ zero-leakage technology with special designs that allow rotary modulating control. From the Mark I’s design that features a characterized upstream seat to the Mark III’s precision engineered stacked disks, the Xactrol® allows the customer to combine precise flow control with tight shut-off. The Xactrol® is typically used in applications where minimum flow and relatively high differential pressures are required.

  • Superior failure resistance and reliability. Benefit: Enhanced process safety
  • Constant packing load maintained with four-stud, live-loaded packing assembly. Benefit: Increased safety, enhanced process efficiency, environmentally friendly
  • Custom-engineered. Benefit: Process optimization
  • Consistent flow-rates. Benefit: Reduced fluid costs
  • Control trim made from extremely hard components. Benefit: Reduced wear, increased life of the valve
  • Zero-leakage shutoff. Benefit: Enhanced process safety, increased efficiency
  • Resistance to small entrained solids. Benefit: Lower maintenance costs, increased reliability

Mark III Design
  • Designed for minimum/normal flow control conditions
  • Variety of characterized upstream seats available
  • Engineered to meet your control needs
  • For applications requiring very high-pressure drops
  • Includes a series of upstream pressure reducing plates
  • For the most difficult control applications

The Mark III is designed for high ΔP liquid applications where cavitation and flashing are a concern and for high ΔP gaseous applications where fluid is flowing at sonic velocity. Applications include: boiler feed pump re-circulation and bypass.

Trim Available:

  • Mark I – single stage pressure drop
  • Mark II – single stage pressure drop, continuous blowdown
  • Mark III – multi-stage pressure drop

Actuator mounting