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Fisher® EH and EHA Control Valves

Fisher® EH and EHA Control Valves
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Product Bulletin Fisherr EH and EHA Control Valves EH (globe) J EHS (NPS 1-1/2x1 through 8x6), J EHD (NPS 2 through 20), and J EHT (NPS 2 through 16x12) EHA (angle) J EHAS (NPS 3 through 6), J EHAD (NPS 3 through 8), and J EHAT (NPS 3 through 8) EH Series Valves These valves are specially designed for high-pressure applications. Fisher EH valve configurations incorporate proven techniques in flow-stream contouring for higher capacities and in valve trim design for reliability in severe applications. The temperature limits of EHT valves can be extended above 232_C (450_F) by using PEEK (PolyEtherEtherKetone) anti-extrusion rings in combination with a spring-loaded PTFE seal. The PEEK anti-extrusion rings expand to close off the clearance gap between the plug and the cage where the PTFE seal may extrude at high temperatures and pressures. The temperature limits are extended to 316_C (600_F) for non-oxidizing service and to 260_C (500_F) for oxidizing service. Unless otherwise noted, all NACE references are to NACE MR0175-2002. Contact Emerson Process Management for information on NACE MR0175/ISO 15156 or NACE MR0103. Improved Cage Design–Drilled-hole cages, offering excellent strength and additional resistance to destructive vibration, are standard. Special materials of construction are readily available. O-ring Seat Ring Gasket Construction–Use of O-ring construction provides excellent shut-off with minimal seat ring installation torques for temperatures up to 232_C (450_F). O-ring

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Product Bulletin construction is standard on EHT valves. The flat sheet seat ring gasket construction is available for elevated design temperatures and/or NACE constructions where a suitable O-ring material is not available. valve plug can be used. For low-flow applications where cavitation damage may occur and the minimum required Cv is equal to or greater than 0.05, Cavitrol III with Micro-Flat trim can be used in both EH and EHA valves. Please contact your Emerson Process Management sales office for more information. Increased Pressure/Temperature Ratings–Steel EH and EHA valves with...

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Product Bulletin Available Configurations See table 1 Common Characteristics: EH valves are single-port, high-pressure, globe-style valves with metal seats, cage guiding, and push- down- to- close valve plug action. EHA valves are angle versions of EH valves EHD/EHAD: Uses a balanced valve plug(1) with graphite valve plug piston rings; also, see tables 3 and 4 EHS/EHAS: Uses an unbalanced valve plug. For low-flow applications, smaller valve sizes are available with specialized valve plug designs. See tables 3(1) and 4 EHT/EHAT: Uses a balanced valve plug(1) with a pressure-assisted PTFE...

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Product Bulletin Specifications (continued) Flow Coefficients Shutoff Classifications See table 8 For NPS 20 valves, one-half of Class IV leakage (0.005% of valve capacity at full travel) per ANSI/FCI 70-2 and IEC 60534-4 Noise Levels See Fisher Catalog 12, section 3 for noise predictions methods Material Temperature Capabilities(3) EHD/EHAD and EHS/EHAS: Up to 593_C (1100_F) unless limited by selection of standard trim materials (table 9 and 10 and figures 20, 21, and 22), Cavitrol III and Whisper Trim III trim materials (table 9), or other parts (table 11) EHT/EHAT: Up to 316_C (600_F)...

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Product Bulletin Specifications (continued) Yoke Boss Diameters for Actuator Mounting See table 18 NPS 8 and 10 CL2500 Valves: 127 mm (5 inch H(10)) yoke boss diameter All Other Sizes and Ratings: J 127 mm (5 inch H(10)) or J 178 mm (7 inch) yoke boss diameter NPS 20 Valve: 178 mm (7 inches) Approximate Weight See tables 19 and 20 Options J Flat sheet seat ring gasket constructions(6), J driver for removing and installing of seat ring retainer, J Class V shutoff for EHT above 232_C (450_F) to 316_C (600_F) by using PEEK anti-extrusion rings, J Class V shutoff for EHD up to 593_C (1100_F)...

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Product Bulletin Table 1. Availability Chart Valve Size, NPS(1) EHD, EHS, EHT EHD, EHS, EHT EHAD, EHAS, EHAT EHAD, EHAS, EHAT EHD, EHS, EHT EHAD, EHAS, EHAT --EHD, EHS, EHT EHAD, EHAS, EHAT EHAD, EHAS, EHAT EHD, EHS, EHT EHAD, EHAS, EHAT EHAD, EHAS, EHAT EHD, EHS, EHT EHAD, EHAS, EHAT EHD, EHS, EHT EHAD, EHAS, EHAT 1. Two numbers indicate end connection by nominal valve size. For example, 3 x 2 indicates 3 inch end connection with NPS 2 valve size. 2. CL2185 (including 14x12 and 16x12) EH Series valves very economical for high-pressure, high-flow service. Actuator selection for NPS 20...

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maintenance downtime normally associated with slant configurations. Installation with the stem vertical above the bonnet also makes trim removal and installation easy. Product Bulletin 51.2:EH June 2014 characterization and efficient flow passages provide close control for low flow, high pressure drop conditions as well as high flow, low pressure drop conditions. A choice of actuator styles allows wide selection of power and control capabilities. Figure 3. NPS 3 Fisher EH Valve with 657 Actuator NPS 1-1/2 x 1 through 6 Globe Valves NPS 3 through 8 Angle Valves EH Series valves (figure 3)...

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Product Bulletin Trims (NPS 1-1/2 x 1 through 6 Globe Valves) Figure 5. Fisher EHS Trim with Micro-Form Valve Plug Figure 6. Fisher EHS Trim with Micro-Flute Valve Plug Figure 7. Diverter Cone Plug Used in NPS 6 Fisher EHD and EHT Valves (Flow Up Only) Diverter cone valve plug used for flowing P 207 bar (3000 psi) or for Whisper Trim III Level A, B, or C cages.

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Product Bulletin Figure 8. Fisher EHD Valve Assembly (NPS 8 through 14 Globe Valves) VALVE STEM CAGE PISTON RINGS PIN VALVE PLUG SEAT RING CAP SCREW SEAT RING Figure 9. NPS 8 Fisher EH Valve with Welded Pipe Expanders and 585C Actuator NPS 8 through 14 Globe Valves EH Series control valves (figure 9) are large, high-pressure globe valves that incorporate proven techniques in flow-stream contouring and in seat ring and valve plug design. These features, along with rugged cage guiding and hardened trim materials, make the EH Series valves reliable high-capacity valves. These valves are used...

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