Catalogs >
FISHER REGULATORS >
Fisher® EWD, EWS, and EWT Valves through NPS 12x8

Fisher® EWD, EWS, and EWT Valves through NPS 12x8
60Pages

Catalog excerpts

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 1

Instruction Manual Fisherr EWD, EWS, and EWT Valves through NPS 12x8 Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Educational Services . . . . . . . . . . . . . . . . . . . . . . . . . 4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Inverted Globe Valve Applications (Actuator below valve) . . . . . . . . . . . . . . . . . . . . . 6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 10 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . 11 Trim Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Lapping Metal Seats . . . . . . . . . . . . . . . . . . . . . 16 Valve Plug Maintenance . . . . . . . . . . . . . . . . . . 17 Trim Replacement . . . . . . . . . . . . . . . . . . . . . . 19 Retrofit: Installing C-seal Trim . . . . . . . . . . . . . . . . 20 Replacement of Installed C-seal Trim . . . . . . . . . . . 24 Trim Removal (C-seal Constructions) . . . . . . . 24 Lapping Metal Seats (C-seal Constructions) . . 25 Remachining Metal Seats (C-seal Constructions) . . . . . . . . . . . . . . . . . 25 Trim Replacement (C-seal Constructions) . . . 26 ENVIRO-SEALt Bellows Seal Bonnet . . . . . . . . . . . 27 Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 1. Fisher NPS 12x6 EW Series Valve With 667 Actuator Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts information for Fisher NPS 4x2 through 12x8 EWD, EWS, and EWT valves (figure 1). Refer to separate manuals for instructions covering the actuator and accessories. Do not install, operate, or maintain an EW valve without being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you have any questions about these instructions, contact your Emerson Process Management sales office before proceeding.

Open the catalog to page 1

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 2

Instruction Manual Table 1. Specifications End Connection Styles Flanged Ends: CL300, CL600, or CL900 Raised-face or ring-type joint flanges per ASME B16.5 Buttwelding Ends: Styles per ASME B16.25 schedules consistent with ASME B16.34 are: Schedules J 40 or J 80 for all CL300 and CL600 valves, Schedule J 80 or J XXS for NPS 8x6 CL900 valves, or Schedule J 80, J 100, or J 120 for NPS 12x8 CL900 valves. Maximum Inlet Pressures, Temperatures, and Pressure Drops(1) Consistent with applicable J CL300, J CL600(2), or J CL900(3) pressure/temperature ratings per ASME B16.34, but do not exceed the...

Open the catalog to page 2

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 3

Instruction Manual Figure 2. Cutaway Detail of the Fisher WhisperFlo Trim, Valve Body Typical Description These single-port globe-style valves have cage guiding, clamped seat rings, and push-down-to-close valve plug action. Valve configurations are as follows: EWD: Balanced valve plug with metal-to-metal seating for all general applications over a wide range of pressure drops and temperatures. C-seal trim is available for EWD valves, CL300 and CL600, in sizes NPS 6x4x2-1/2, 6x4, 8x4, 8x6, 12x6, 10x8, and 12x8. With C-seal trim, a balanced valve can achieve high-temperature, Class V shutoff....

Open the catalog to page 3

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 4

Instruction Manual Table 2. Shutoff Classification Per ANSI/FCI 70-2 and IEC 60534-4 Valve Shutoff Class II (standard) III (optional for NPS 6x4 through 12x6 valves with optional single graphite piston ring or for NPS 10x8 and 12x8 valves with optional double piston rings) IV (optional for NPS 6x4 through 12x8 valves with optional multiple graphite piston rings) EWT with all except Cavitrol III cages Standard Air Test (maximum leakage is 0.05 mL/min/psid/inch port diameter) IV (standard) V (optional, consult your Emerson Process Management sales office) EWT with 1-stage Cavitrol III cage...

Open the catalog to page 4

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 5

Instruction Manual Check with your process or safety engineer for any additional measures that must be taken to protect against process media. If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this instruction manual. CAUTION When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop and controlled fluid conditions. Responsibility for the safety of process media and compatibility of valve materials with process media rests solely with the purchaser...

Open the catalog to page 5

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 6

Instruction Manual 4. Use accepted piping and welding practices when installing the valve in the line. For flanged valve bodies, use a suitable gasket between the valve body and pipeline flanges. CAUTION Depending on valve body materials used, post weld heat treating may be required. If so, damage to internal elastomeric and plastic parts, as well as internal metal parts is possible. Shrink-fit pieces and threaded connections may also loosen. In general, if post weld heat treating is to be performed, remove all trim parts. Contact your Emerson Process Management sales office for additional...

Open the catalog to page 6

Fisher® EWD, EWS, and EWT Valves through NPS 12x8 - 7

2. Provide adequate support to the bonnet while removing the bonnet nuts. 3. Be aware that the bonnet/plug/cage may tip over as they are lowered from the valve body. Make provision to prevent tipping. 4. Be aware that the cage and seat ring may not come out with the bonnet and plug/stem assembly. If this occurs, make provision to support these parts, as they may fall out unexpectedly. Start this assembly procedure with the plug/stem assembly already installed in the bonnet. Put the gaskets and cage onto the bonnet and plug. Place the seat ring with the seat ring gasket onto the cage, if...

Open the catalog to page 7