MK70 is a diaphragm operated Control Valve manufactured in the US by Jordan Valve. The valve is metal/metal seated (Ansi class IV) and utilises the same sliding gate seats found in Jordan’s range of Pressure Regulators (MK50/MK60) and Temperature Control Valves (MK80).
It is available in sizes ½”→ 2″ (Cv 2.5 to 30) and up to 6″ in model 711. The standard valve has threaded (BSPT or NPT) but can be flanged on request. The valve is actioned by a multi-spring pneumatic actuator and can be used for on/off or modulating for liquids, gases, chemicals and steam. Flow is controlled by the movement of the gate/disc which moves in response to a 3-15 psi pneumatic signal received from a controller.
Where the signal is in milliamps, an I/P transducer can be fitted (i.e. converts a 4-20mA signal to 3-15 psi) or, for even more precise control, the pneumatic actuator can be fitted with a pneumatic or I/P positioner.
* Options: MK701/702 Cv 50/70 High Flow version, equal % seats, low flow seats for all sizes, side or top mounted positioner, flanges to AS or Ansi. Many more options, flanged MK711 (sizes to DN150)
Technical Specifications| Brand | Jordan |
| Model | MK70 |
| Type | Pneumatic Control Valve |
| Style | Sliding Gate |
| Size Range | 1/2" (DN15) - 2" (DN50) |
| Pressure Rating | Up to 1440 PSI |
| Positioner | Side or Top Mount (Various Options for Communication Standards) See Positioner Tech Sheet |
| End Connections | Threaded (FNPT, BSPT, BSPP) ANSI Flanges (150#, 300#) DIN Flanges (PN10/16, PN25/40) JIS (10K, 20K) |
Material Specifications| Body | Ductile Iron Bronze (1/2" - 2") Carbon Steel Stainless Steel Cast Iron (2-1/2" - 6") |
| Diaphragm | Buna N (Standard to 93 Degree C) |
| Seat | Jorcote on SST (Standard) |
| Trim | 303 Stainless Steel (Standard on Ductile Iron, Bronze, Carbon Steel, Cast Iron) 316 Stainless Steel (Standard on Stainless Steel Valves) Monel, Hastelloy & other Alloys available. |
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Control Valve Overview
