1. General Introduction
Fisher ED single port globe control valve is a balanced valve plug type with cage guide which suitable for wide range of general applications, available size from NPS 1 to 30; Trim temperature capability with standard metal seats to 427℃, the standard cage comes in three different flow characteristics as quick-opening, linear and equal percentage. It mainly come with typical features as below:
Balanced Valve Plug Construction: Balanced valve plug construction permits use of smaller, lower-cost Fisher actuators. Also, trim inventory costs are cut because dimensional standardization permits use of most standard easy-e trim parts.
Cage guide: Rugged cage guiding provides high valve plug stability, which reduces vibration and mechanical noise.
High-Temperature Capability with Class IV or Class V Shutoff: Use of multiple graphite piston rings and C-seal trim permit Class IV shutoff up to 593℃.
Multi material selectable: Carbon Steel, Stainless, Alloy
Process Connection Type: Flanged, Butt Weld, RTJ, Threaded, Socket Weld
2. Comparable table of Fisher E series Valve
Type | Guide type | Plug type | Shut off | Temperature | Soft Seat | Seal Ring | Others |
ED | Cage | Balanced | II to III | 427℃ | No | Graphite | C seal |
ET | Cage | Balanced | IV-V | 204℃ | Yes | PET | |
ES | Cage | Un-Balanced | VI | 538℃ | Yes | No | |
EZ | Cage/guide | Un-Balanced | VI | 427℃ | Yes | No | |
Notes: | 1. Dimension and pressure rating of E series valve is same, thus valves can be interchanged, but internal parts are different. | ||||||
2. E series valves are top guided type, also easy remove and change internal parts for maintenance. |
3. ED series Port Diameters, Valve Plug Travel, and Stem and Yoke Boss Diameters
Full-Sized Trim [NPS] | Port Diameter [mm] | Valve Plug Travel [mm] | Standard Stem [mm] |
1 | 33.3 | 19 | 9.5 |
1 1/2 | 33.3 | 19 | 9.5 |
2 | 58.7 | 29 | 12.7 |
2 1/2 | 73.0 | 38 | 12.7 |
3 | 87.3 | 38 | 12.7 |
4 | 87 | 51 | 12.7 |
6 | 177.8 | 51 | 12.7 |
8 | 203.2 | 51 | 19.1 |
4. Typical section drawings for ED series
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