Device Description - Fisher ED Safety Manual

SIL Safety Manual
D103401X012

Device Description

Fisher ED single-port valves (figure 1) have cage guiding, quick-change trim, and balanced push-down-to-close valve
plug action. Valve configurations are as follows:
ED--Globe-style valve with metal-to-metal seating for all general applications over a wide variety of pressure drops and
temperatures.
EAD--Angle version of ED, used to facilitate piping or in applications where a self-draining valve is required.
Fisher ES single-port valves (figure 1) have cage guiding, quick-change trim, and unbalanced push-down-to-close valve
plug action. Valve configurations are as follows:
ES--Globe-style valve with metal-to-metal seating as standard for all general applications over a wide range of pressure
drops and temperatures, and metal-to-PTFE seating is optional for more stringent shutoff requirements.
EAS--Angle version of ES, used to facilitate piping or in applications where a self-draining valve is required.
Fisher ET single-port valves (figure 1) have cage guiding, quick-change trim, and balanced push-down-to-close valve
plug action. Valve configurations are as follows:
ET--Globe-style valve with metal-to-PTFE seating (standard for all except Cavitrol III cages) for stringent shutoff
requirements, or metal-to-metal seating (standard for Cavitrol III cages, optional for all others) for higher
temperatures.
EAT--Angle version of ET, used to facilitate piping or in applications which require a self-draining valve.
Fisher EZ valves (figure 1) are globe-style with integral end connections, post guiding, and quick-change trim. These
valves are used in chemical or hydrocarbon processing applications or in applications that require control of
nonlubricating, viscous, or other hard-to-handle fluids.
Fisher HP Series high-pressure globe and angle valves (figure 1) have metal seats, cage guiding, quick change trim, and
push-down-to-close valve plug action. HPD, HPAD, HPT, and HPAT valves use balanced valve plugs. HPS and HPAS
valves use an unbalanced valve plug. To provide a seal between the cage and a balanced valve plug, the HPD and HPAD
valve plugs use piston rings; the HPT and HPAT valve plugs use a pressure-assisted seal ring. A Whisper Trim cage can
be used with an HPD, HPAD, HPS, HPAS, HPT, or HPAT valve plug. A Cavitrol III cage can be used with an HPS, HPAS,
HPT, or HPAT valve plug.
ED, ES, ET, EZ, HP, HPA Valves w/ 657/667 Actuator
November 2011
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