Mark 50 Series

Company Name : Jordan

Sizes:(1/4″ & 3/8″ sizes use 1/2″ body with reducers)
  • Mark 50: 1/4″ through 4″ (DN8 through DN100)
  • Mark 500C: 1/4″ through 2″ (DN8 through DN50)
  • Mark 51: 1/4″ through 3/4″ (DN8 through DN20)
  • Mark 50HP: 1/4″ through 4″ (DN8 through DN100)
End Connections:
  • Threaded – FNPT, BSPT, BSPP (1/4″ – 2″ only, DN8- DN50)
  • ANSI Flanges (150#, 300#, 600#)
  • DIN Flanges (PN10/16 , PN25/40)
  • JIS Flanges (upan request)
Spring Housing:
  • Ductile lron – 1/4″ – 2″ (DN8 – DN50)
  • Ductile lron – 2-1/2″ – 4″ (DN65 – DN100)
Body Materials:
  • Ductile lron
  • Bronze (1/2″ – 2″, DN15-DN50)
  • Cast lron (2-1/2″ – 4″, DN65-DN100)
  • Carbon Steel (A216 WCB)
  • Stainless Steel (A351/CF8M)
Trim Materials:
  • 303SST – Standard on Ductile lron, Bronze, Carbon Steel valves
  • 316SST – Standard on Stainless Steel valves
  • Monel, Hastelloy and other Alloys available
Pressure Control Ranges: Select a range to match your setpoint. For optimal performance , your setpoint should fall in the upper portian of the selected range.


Seat Materials:

  • Jorcote on SST – Standard
  • Other materials available – Consult factory

Seat Materials:

  • Jorcote on SST – Standard
  • Other materials available – Consult factory

Diaphragm Materials:

  • Jorlon – Standard
  • Stainless Steel – Standard
  • Buna-N – Standard
  • Vitan – Optional

Service: Steam, water, oil, gas, air and chemicals

Shutoff: ANSI Class IV


  • Double Bolting: improves the pressure rating of the valve and ensures a tight seal between the spring housing and the body for services with high inlet pressures.
  • High Pressure Spring Housing: the HP option is an elongated spring housing that features a
    large spring for high pressure setpoints (up to 450 psi/31bar).
  • Handwheel: the H option is a handwheel that is mounted on the adjusting screw to allow for easy setpoint changes.
  • Exotic Alloys: where service conditions dictate the use of specialty materials, the Mark 50 Series can be produced with bodies, trim and seats in Monel, Alloy 20, Hastelloy B, Hastelloy C, Titanium and others.
  • GP Option: grain processing modification for starch cookers and other viscous services.
  • Cryogenic Service: CR option is a special spring housing for use if valve is in cryogenic conditions.

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