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Fisher® D and DA Valves

Fisher® D and DA Valves
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Instruction Manual Fisherr D and DA Valves Contents Figure 1. Fisher D Valve with 657 Actuator Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Educational Services . . . . . . . . . . . . . . . . . . . . . . . . . 2 Ceramic Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 6 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Trim Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Lapping Metal Seats . . . . . . . . . . . . . . . . . . . . . . 8 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts information for Fisher D and DA valves. Refer to separate manuals for instructions covering the actuator, positioner, and accessories. Do not install, operate, or maintain a D or DA 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. Unless otherwise noted, all NACE references are to NACE MR0175-2002. Description The D globe-style (figure 1) and DA angle-style (figure 5) valves are single-port, metal-seated valves for high-pressure applications.

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Instruction Manual Table 1. Specifications Maximum Inlet Pressures and Temperatures(1) Maximum Service Temperature If the valve nameplate shows an ASME pressure-temperature class, maximum inlet pressure and temperature is consistent with applicable ASME class per ASME B16.34. If the nameplate does not show an ASME class, it will show a maximum cold working pressure at 38_C (100_F) (for example, 3600, 6000, 9000, or 10,000 psi) 232_C (450_F) Flow Characteristic Equal Percentage Flow Direction Maximum Allowable Pressure Drops(1) D Valve: Flow up through the seat ring and out past the valve...

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Instruction Manual Ceramic Trim Some types of ceramic trim, including the VTC (very tough ceramic) variety, can create a spark under certain circumstances. When the edge of a ceramic part is struck against a second ceramic part with enough force, a spark can be created. WARNING Avoid personal injury and property damage from ignition of process fluid caused by sparks from ceramic trim. Do not use ceramic trim where the process fluid is unstable or if it is an explosive mixture (such as ether and air). Installation WARNING Always wear protective gloves, clothing, and eyewear when performing...

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Instruction Manual CAUTION Depending on valve body materials used, post-weld heat treating might be needed. 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 needed, remove all trim parts. Contact your Emerson Process Management sales office for additional information. For screwed end connections, apply pipe compound to pipeline threads. 4. To allow continuous operation during inspection or maintenance, install a three-valve bypass around...

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Instruction Manual Maintenance WARNING Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations: D Do not remove the actuator from the valve while the valve is still pressurized. D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal injury. D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve. D Use bypass valves or completely shut off the process to isolate the...

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lubricant. Do not lubricate packing used in oxygen service. To operate the lubricator, turn the cap screw clockwise to force the lubricant into the packing box. The lubricator/isolating valve operates the same way except open the isolating valve before turning the cap screw. Close the isolating valve after lubrication is completed. Packing Maintenance Refer to figures 3, 4, and 5 for key number locations. For spring-loaded single PTFE V-ring packing, the packing spring (key 9) maintains a sealing force on the packing. If you find leakage around the packing follower (key 10), check to be...

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Instruction Manual Figure 3. Packing Arrangements UPPER WIPER MALE ADAPTOR LANTERN RING ASSEMBLY 1 ASSEMBLY 2 ASSEMBLY 3 ASSEMBLY 1 ASSEMBLY 2 ASSEMBLY 3 (POSITIVE (VACUUM) (POSITIVE (POSITIVE (VACUUM) (POSITIVE PRESSURES) PRESSURES PRESSURES) PRESSURES & VACUUM) & VACUUM) FEMALE ADAPTOR LANTERN RING DOUBLE PTFE 8. Install a new bonnet gasket (key 7), making sure the gasket seating surfaces are clean and smooth. Carefully install the valve plug/stem assembly into the valve body. Then slide the bonnet over the stem and thread it tightly into the valve body, per the torque values in table 4....

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Instruction Manual Table 5. Torque for Seat Ring (Key 2) VALVE SIZE, NPS 10. Slide the packing follower, upper wiper, and packing flange (keys 10, 21, and 12) into position. Lubricate the packing flange studs (key 13) and the faces of the packing flange nuts (key 15). Install the packing flange nuts. 11. For spring-loaded PTFE V-ring packing, tighten the packing flange nuts (key 15) until the packing follower (key 10) contacts the bonnet. For other packing arrangements, tighten the packing flange nuts (key 15) alternately in small equal increments. Continue until one of the nuts reaches the...

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