C28 Cryogenic High Pressure Valve

Special mechanical design and construction
  • Solid one-piece high torque durable stem.
  • Tight stem-to-ball directional engagement, ensures relief hole alignment.
  • Strict materials and manufacturing tolerances control.
Efficient heat transfer
  • A narrow space between the extension ID and the stem OD allows the stem seal to remain at an ambient temperature.
No-Trap Cavity
  • Relief hole on the upstream sphere of the ball to prevent pressure buildup in the cavity.
  • Single-side or self-pressure-relief sealing for bidirectional full pressure service.
Flexible bonnet installation angle
  • Up to 45° from the vertical axis for the 12” bonnet (per BS6364 guidelines).
  • Up to 15° from the vertical axis for the 6” bonnet (not BS6364 compliant).
Flow direction indicators (for valves with preferred flow direction)
  • Highly visible arrows on body and bonnet top.
  • “T” mark on the stem, showing relief hole direction.
  • Double isolation / double block and bleed designs available upon request
  • Clean assembly and packing


Size Range: 1/4″ – 8″ (DN8 – DN200)

Pressure Range: Class 2500

Design Features

  • High Pressure Cryogenic Class 2500
  • Full differential pressure for sizes up to and including 2″ (DN50)
  • Sifferential pressure of up to 103 bar (1494 psi) for sizes 2½” (DN65) and above with hybrid seats

Pressure containing parts:

  • In compliance with ASME B16.34 for wall thickness
  • Design type-tested for burst testing of four times the pressure rating for 5 minutes.

One-size-up stem

  • Made of high tensile material complies with ASME B16.34 and API 6D for drive train requirements
  • Provides a sufficient safety factor during operation.

Special hybrid seat design

  • Comprised of a metal housing
  • Polymer insert machined as a single unit provides bubble tight shut-off (Rate A) combined with lower operating torque.