Installing Flat Metal Seals; Installing Hd Ball Seals - Fisher Vee-Ball V150 Instruction Manual

Vee-Ball Valves
June 2017

Installing flat metal seals:

a. Install 12 shims in the valve and install the flat metal seal on top of the shims.
b. Install the spring seal (key 13) on the flat metal seal (key 11) with the convex side of the spring seal facing the
ball.
c. Install the seal protector ring, and install the protector ring screws and washers (keys 21 and 22). Tighten the
screws.
d. Add or remove shims under the ball seal as necessary to obtain zero ball seal deflection as accurately as possible.
Note
Zero ball seal deflection for a flat metal seal is the point at which the addition of one 0.13 mm (0.005 inch) thick shim causes
contact between the ball and ball seal to be broken. Hold the parts tightly together when determining zero deflection, or improper
zero deflection might result.
e. After zero deflection is reached, remove the seal protector ring, spring seal, seal and 4 shims. Final assembly of
the control valve should not exceed a maximum of 9 shims for zero deflection. If more than 9 shims are required,
contact your Emerson sales office
f. Install the gasket (key 15) on the valve body.
g. Install the seal protector ring (key 3) into the valve body. Now go to step 5 in this procedure.

Installing HD ball seals:

Note
The older and newer designs of the NPS 1 and 1-1/2 seal protector ring are functionally the same, but are different lengths and not
interchangeable. All NPS 1 and 1-1/2 sizes of V150 and V300 valves are the newer design. The change in seal protector ring length
occurred in the 1992/1993 timeframe and affects NPS 1 and 1-1/2 V200 valves only. To determine whether you have the older or
newer design, measure the length of the seal protector ring (key 3, figure 26) from its pipeline flange mating surface to its
opposite end. Compare your measurement to those listed in figure 7.
a. For NPS 1 and 1-1/2 valves: The older and newer designs of the NPS 1 and 1-1/2 seal protector rings are
functionally the same, but are different lengths and not interchangeable. Refer to figure 7 for protector ring
dimensions.
D Install the wave spring (key 13) onto the ball seal.
D Lubricate and install the radial seal (key 37) onto the ball seal (key 11). Make sure the open side of the radial
seal faces away from the ball.
D Push the ball seal assembly into the seal protector ring (key 3).
D Go to step 5 in this procedure.
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Instruction Manual
D101554X012