Fisher 9500 instruction manual That must be taken to protect against process media

Instruction Manual

Form 2433

November 2007

9500 Valve

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.

These valves may be installed in many positions by referring to the Actuator Mounting procedures and figure 6 in this manual. For conventional discs, flow may be in either direction. For Fishtail discs, the leading edge of the disc must be located in the upstream end of the valve (see figure 2).

CAUTION

As noted in the following paragraphs, improper use of additional gasketing materials will damage the valve liner.

The valve body liner extends past or overlaps the valve face producing the partial O-ring shown in figure 3. It also acts as the flange gasket. Improper use of additional gasketing materials will damage the valve liner.

Care must be taken during installation to ensure that the pipe flanges are properly supported. Pipe flange support is required to avoid liner flange joint leakage or problems during valve operation. Slip-on pipe flanges may be used with NPS 2, 3, or 4 valves. An NPS 6 valve or larger will require flange adapters for complete liner support.

Mating flanges or pipe flanges with inside diameters smaller than the minimum shown (see table 3) may interfere with the opening of the disc. Flanges or pipes with an inside diameter larger than the maximum shown (see table 3) may not be in full contact with the liner. Install flange adapters in each case, either to provide disc clearance or to fully contact the liner.

Flexible, plastic flanges, fiberglass, slip-on, or weld-neck with other than standard inside diameters may not provide adequate support for the liner. Also, flexible mating flanges can be warped with excessive line bolt load. They may fail to support the liner at the inside diameter of the valve body. Use flange adapters, available from Emerson Process Management, during installation to avoid these problems. Whenever a flange adapter is used, a standard flange gasket must be installed between the line flange and flange adapter. Do not use a

flange gasket between the valve and flange adapter. The partial O-ring on the liner acts as the flange gasket and any additional gasket here will damage the liner.

The Type 9500 valve may be used as part of a three-way valve assembly. The actuator-valve linkage is adjusted at the factory; you won’t need to adjust the linkage before placing the valve in service. If the valve and actuator are being re-installed, after removal, or if you suspect that the linkage is out of adjustment, refer to the Linkage portion of the Adjustments section before installing the valve in the pipeline. If the valve has been purchased separately, or if the actuator has been removed, complete the procedures in the Actuator Mounting section of this manual before proceeding.

WARNING

Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations:

DAlways wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal injury.

DDisconnect 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.

DUse bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure on both sides of the valve. Drain the process media from both sides of the valve.

DVent the power actuator loading pressure and relieve any actuator spring precompression.

DUse lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

DThe valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the pipeline. Process fluids may spray out under pressure when removing the packing

3