Emerson Fisher SS-264 Instruction Manual page 22

SS-264 Valve
September 2021
Figure 12. Ball Angle and Travel Stop Reference
NEGATIVE (-)
BALL ANGLE
POSITIVE (+)
BALL ANGLE
¼ TURN = 0.3 DEG BALL ROTATION
1 TURN = 1.2 DEG BALL ROTATION
8. With water or process fluid in the valve, lap the ball and seal by cycling the ball/shaft assembly into and out of the
seal 3 times. During the opening of the valve, note the pressure that the ball begins to move. It should be between
26-30 psig. If the pressure noted is outside this range, then the following section can be followed to fine tune the
travel stops.
9. After cycling the valve perform a seat leak test as described in the Ball Seating Check section.
Ball Seating Check
1. Rotate the valve into the closed position (apply actuator air).
WARNING
The following step, if done incorrectly, could severely damage the seal ring or the ball. Do NOT allow a differential pressure
across the valve greater than 66 psi.
2. Perform a 5-minute seat leakage test with 60 (+6/-0) psi differential pressure.
a. If seat leakage more than Class V allowable in the first 5 minutes is detected, then skip to step 3 below.
b. If seat leakage meets Class V criteria in the first 5 minutes, then allow 5 additional minutes to stabilize.
c. After the stabilization period, perform seat leakage test to confirm Class V leakage requirements are met. If Class
V leakage requirements are met skip to step 5; If seat leakage does not meet Class V requirements in the initial
22
FLOW
(-)
(+)
CLOSED TRAVEL STOP
(FRONT VIEW)
SEAL RING
BALL
BALL RANGE
OF MOTION
Instruction Manual
D103565X012
TOP VIEW