Bulletin 51.1:ES
January 2001
Design ES and EAS Sliding-Stem Control Valves Design ES and EAS general-purpose control valves (figures 1 through 3) are used for throttling or on-off control of a wide variety of liquids and gases. Both valve designs have single ports, unbalanced valve plugs, and cage guiding. In both designs, metal-to-metal seating is standard for all general applications over a wide range of pressure drops and temperatures. Metal-to-PTFE seating is optional for more stringent shutoff requirements.
The easy-er Valve Family Design ES and EAS valves are part of the versatile easy-e family of industrial control valves from Fisher. easy-e valves share the following characteristics: D Multiple trim material choices D Trim temperature capability with standard metal seats to 427_C (800_F) D FGM gaskets D Interchangeable, restricted-capacity trims and full-flow trims to match variable process flow demands D Trim part interchangeability that permits reconfiguring the valve to a different design variation D Different cage/plug styles that provide particular flow characteristics for highly-specialized applications. The standard cage comes in three different flow characteristics: W2174–1/IL
Figure 1. Design ES Control Valve with Type 657 Actuator
D100021X012
D quick-opening D linear D equal percentage