High Pressure Back Pressure Regulator

The Mark 5850HP is a high pressure, back pressure regulator designed to maintain upstream pressure of gases and liquids. With a robust piston design, the Mark 5850HP can handle setpoints up to 5000 psig (345 bar) at 450°F (232°C) with ease. USDA and FDA approved soft goods available upon request.

  • High pressure vessel venting
  • High pressure injection applications
  • Gas/liquid sampling station
  • Compressor skids
  • Test standards


  • Gas chromatography
  • Flame ionization detectors
  • Industrial controls
Features & Benefits
  • Completely barstock construction – ensures body/trim material quality and facilitates usage of alloy materials
  • High flow – Cv 1.0 9Kv 0,9) in a compact design
  • Full pressure rating across entire temperature range – maximum setpoints available at maximum pressures
  • T-bar handle – permits usage of lighter, more sensitive spring
  • Proof tested to 12,000 psi (827 bar) – nearly five times pressure rating, ensures safety when working with high pressures
  • A variety of seal materials ensure compatibility with medium setpoint

Seat Type: Teflon

Size: 1/2″ (DN15)

End Connections: Threaded, socket weld, flanged, others

Body Materials: 316L Stainless Steel, Hastelloy C, Monel, Alloy 20, others

CV (Kv): 0.4 (0,34)

Spring Range: 800 – 5000 psi (55 – 345 bar)


ATEX Certified

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