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Application |
 | Valve size |
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| Required valve operating thruster torque |
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| Media being handled, e.g., liquid, gas, slurry, or solid |
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| End connections, e.g., screwed, ranged/lugged, wafer, butt-weld, mechanical joint, etc. |
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| Power supply. e.g., voltage, available air supply |
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| Corrosiveness of atmosphere |
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| Materials of construction, e.g., carbon steel, resins, steel or other alloys, cast iron, etc. |
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| On/off, throttling, or proportional control |
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| Flow (velocity, capacity, Cv, direction) |
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| Body |
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| Corrosive resistance: materials, coating, tubing |
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| Pipe size |
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| Trim |
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| Speed of operation |
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| Media temperature (maximum to minimum) |
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| Seats |
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| Speed of operation |
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| Pressure: maximum operating pressure; maximum differential pressure |
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| Bolting |
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| Special requirements, tagging, testing |
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| Operation: e.g., manual/automatic, on-off throttling |
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| Frequency of operation |
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| Accessories, e.g.' limit switches, positioner, solenoid valve, transducers, manual overide |
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| Installation constraints |
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| Packing |
|
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| Envelope dimensions |
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| Special requirements, e.g., testing, tagging, coating |
|
Service Requirements |
| Weight |
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| Accessories, e.g., stem/shaft extensions, locking device, position indicator, jacketing |
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| Testing |
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| Accessibility |
|
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| Source inspection |
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| Conformance to approprate standards, e.g., API, AWWA, ANSI, FM, UL, OSHA, etc. |
|
Valve Actuation |
| Availability of replacement valves, actuators, or parts |
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| Tightness of shutoff required |
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| Type, e.g., manual, electric, pneumatic, hydraulic |
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| Documentation, e.g., certified prints, dimension drawings |
|
|
Valve Requirements |
| Motion required |
|
| Installation and maintenance instructions |
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| Type of valve, e.g., ball, butterfly, gate, check, control, globe, plug, relief, regulator, pinch, diaphragm, etc. |
| Rotary, e.g., quarter-turn, multi-turn |
|
| Delivery requirements, e.g., timing, packaging |
|
| |
| Linear |
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| Availability of engineering service, e.g., application, field, factory |
|
| |
| Mode of operation |
|
|
| |
| Double acting |
|
|
| |
| Spring return: spring-to-closed, spring-to-open |
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