Mark 37 and Mark 377 Series Final Control Element Valve
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- Sliding gate seats to enable straight flow through to reduce turbulence and noise.
- Fast operating speed due to a shorter stroke than globe or plug-style valves.
- Stem packs four times deeper than the stem travel to supply long stem and packing life.
The Mark 37 Series control valve couples an electronic linear actuator with Jordans sliding gate seat technology to produce a highly accurate controller. This means that the Mark 37 is the ideal final control element for distributed process control systems.
Advantages of sliding gate seats
Sliding gate seats help to provide a greater level of accuracy than other controller designs as they have a shorter stroke due to the straight flow through of the system. Faster responses are also given by having a shorter stroke than globe or plug-style valves.
Seats are easily interchangeable and provide a tight shutoff that is ANSI Class IV rated. 306SST / Jorcote and 316SST / Jorcote are used as the seat materials while the body materials used are carbon steel, stainless steel, bronze and ductile iron.
Temperature ranges for the controller are between -20°C and 66°C with the option for a low temperature spec which can operate till -40°C. The enclosure is explosion proof for Class I, Div.1 Group C, D and is Dust-ignition-proof for Class II, Div. 1, Groups E, F, G.
Key specifications
| Sizes | 1/4" through 6" (DN8 through DN150). Note: 1/4" & 3/8" sizes uses 1/2" body with reducers. |
| End connections |
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| Body materials |
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| Trim materials |
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| Seat materials |
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| Yoke material | Cast Iron |
| Stem Packing | Spring loaded Teflon (to 500°F/260°C); braided (above 500°F/260°C) |
| Service | steam, water, air, oil, gas and chemicals |
| Shutoff | ANSI Class IV |
| Flow characteristic |
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| Action |
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| Actuators |
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Full specifications and further information can be found by downloading the spec sheet here.
Model numbers
- 37
- 377
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Data sheets and manuals
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- View manual
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