Z98P High Temperature Floating Ball Valve

  • Stainless Steel, alloys, Carbon Steel – selected to meet temperature and application. ASME B16.34 listed cast or forged material for the valve body and ends.
  • Surface treatments & coatings – LTPN, HVOF Cr₃ C₂ (Chromium Carbide), HVOF WC-Co (Tungsten Carbide) and Stellite.
Robust design:
  • Pressure containing parts are in compliance with ASME B16.34 (with modifications for some series).
  • Leak rate to EN12266-1 Rate B (factory tested) is achieved by accurate grinding and lapping processes.
  • Constant preloading of ball/seats set obtained by Inconel 718 Belleville spring.
Pressure tested:
  • Designs are burst proof tested for 4 times the maximal working pressure.
  • Designed and tested per testing & acceptance criteria ANSI/FCI 70-2.


Size Range: 1/4″ to 6″ (DN8 – DN150)

Pressure Range: Class 2500

Temperature Ratings: -76°F to 752°F

Trunnion Valves Only Temperature Ratings: -40°F to 620°F

Design Features

  • High Pressure
  • High Temperature
  • Class 2500
  • Full differential pressure for sizes up to and including 2″ (DN50)
  • Differential pressure of up to 255 bar (3700 psi) for sizes 2½” (DN65) and above with hybrid seats.

Pressure containing parts are in compliance with ASME B16.34, for wall thickness, design type-tested for burst testing of four times the pressure rating for 5 minutes. A one-size-up stem made of high tensile material complies with ASME B16.34 and API 6D for drive train requirements which provides sufficient safety factor during operation. A special hybrid seat design is comprised of a metal housing and polymer insert machined as a single unit provides bubble tight shut-off (Rate A), combined with lower operating torque.