Fisher instruction manual Reassembly, Taper Pin Details for 9500 Series Valves

Instruction Manual

Form 2433

November 2007

9500 Valve

Table 5. Taper Pin Details for 9500 Series Valves

VALVE	SHAFT	AMERICAN
		STANDARD
SIZE,	DIAMETER		DRILL SIZE
		TAPER
NPS	mm (Inches)
		PIN SIZE
2	12.7 (1/2)	2	#20 (0.161 Inches)
3, 4	15.9 (5/8)	3	#16 (0.177 Inches)
6	19.1 (3/4)	4	13/64 Inches
8, 10	25.4 (1)	6	9/32 Inches
12	31.8 (1-1/4)	7	21/64 Inches

Reassembly

Before reassembling the valve, clean and inspect all parts. Key number locations are shown if figure 7. Refer to the Parts List section to obtain replacement parts.

c.Insert the liner into the valve body. Align the liner shaft holes with valve body shaft holes. Remove excess bonding agent from shaft holes and exposed liner surfaces.

d.Insert the disc (key 3), thrust sleeve assemblies (key 6), and shaft (key 4) into the valve body. Be sure the thrust sleeve assemblies engage the liner recesses to ensure proper liner positioning. Rotate the disc to the closed position.

e.Lay the valve on one valve face and add weights to the other face to ensure a tight bond. Allow to cure for 24 hours. Then, proceed with the following reassembly steps.

2.Insert the thrust sleeve assemblies into the valve body. Be sure that the thrust sleeve assemblies enter the liner recesses to align the shaft holes, by temporarily inserting the shaft(s) (key 4).

WARNING

Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or property damage.

1.Insert the liner (key 2) into the valve body. A small amount of silicone grease applied to the outside surface of the liner will aid insertion of the liner. However, do not use grease if the valve is to be used for oxygen service.

In vacuum service applications, upon customer request, you may use Eccobondr 285/24LV bonding agent (Fisherr part no. G1414006992) to bond the liner to the valve. Though bonding is not required use the lettered steps below when bonding the liner to the valve body. If a different agent is to be used, follow instructions furnished by the bonding agent manufacturer. In absence of instructions, consult your Emerson Process Management sales office.

a.Roughen bonding surface of liner with a stiff wire brush. De-grease bonding surfaces of the liner and valve body with solvent.

b.Mix the two epoxy components thoroughly and spread a thin coat [approximately 0.38 mm (0.015 inches) thick] of the mixture over all bonding surfaces of the valve body and liner.

3.A new disc and shaft should be installed if the taper pin holes have been widened by loosening of the taper pins (key 15).

Omit the following steps 4 through 8 if a new disc and shaft assembly is to be installed or if the old disc and shaft are to be reused. Use new taper pins whenever the disc has been removed.

CAUTION

If a new disc is required, a complete disc/shaft assembly must be purchased to avoid damage to valve parts. The old valve shaft cannot be used with a new disc.

If a new shaft (without disc) has been purchased, be sure to mark the shaft to indicate the disc position as shown in figure 2.

4.Making certain the taper pin holes are on the actuator side of the valve body, insert the disc into the valve body. Position the disc at the fully closed position.

5.Installing splined shaft:

a. If the old shaft is available, insert it into the valve body and disc. Line up the taper pin holes in the disc and shaft; measure and record the distance between the valve body and the splined end of the shaft. Remove the old shaft and insert the new, un-drilled shaft. Position the shaft so that there is the same distance between the valve body and the end of the shaft as noted above.

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