Flowserve PT Series Limitorque User Manual

Page 8

Limitorque PT Series Worm Gear Operator FCD LMENIM2001-00 – 01/10

2.5 Setting Position Limit Stops - PT12, 14, 30, 40, 50, 75

Refer to Figure 2.2.

1. Remove the two Stop Screw Caps (pc# 10) (if supplied) to expose the Stop Screws (pc# 11).

2. Loosen the Stop Adjusting Nut on the Stop Screw and adjust the screw by turning it counterclockwise to back the

screw away from the Worm Gear Quadrant (pc# 12)

3. Place the valve disk in the full closed position

4. Turn the Stop Screw (pc# 11) in the clockwise direction until the end of the screw contacts the Worm Gear

Quadrant (pc# 12)

5. Tighten the Stop Adjusting Nut to secure the closed set position

6. Move the valve disk to the full open position

7. Follow steps 2 through 5

CaUTIOn: If the valve is operated with an electric actuator/gear operator combination, and the valve is position-
seated, set the actuator limit switches to trip prior to engagement of the PT Drive Sleeve/Worm Gear with the
Stop Screws. Damage to the operator could result from the Drive Sleeve/Worm Gear contacting the Stop Screw
under motorized operation.

note: The stops are adjustable to +/- 5º of total travel to allow for proper positioning of the worm gear quadrant.

Figure 2.2 – Setting Position Limit Stops – PT12, 14, 30, 40, 50, 75

5 5

SERIAL No:

FULLY GREASE

DIVISION OF

02B

17 18

09B

12A

16B