Flowserve LY Series Limitorque - Manual (Page 24)

Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
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5.9.3 Setting the OPEN Mechanical Stop on the LY 1001
Piece numbers refer to Figure 5.10.
1. With the valve in the full OPEN position, set OPEN Mechanical Stop Set Screw (piece #58) by
removing the Set Screw (piece #59). (See Figure 5.9 for orientation.)
2. Using the Handwheel, turn the valve to the OPEN position. Verify the valve is fully open before
setting the Mechanical Stop Set Screw.
3. Rotate Mechanical Stop Set Screw (piece #58) in the CW direction until contact with the Torque Nut
(piece #32) occurs.
4. Back-off Mechanical Stop Set Screw (CCW direction) approximately 11/2 turns.
5. Reinstall Set Screw (piece #59).
6. Manually operate the actuator through the open limit to assure setting is correct.
5.9.4 Setting the OPEN Mechanical Stop on the LY 2001/3001
Piece numbers refer to Figure 5.11.
1. With the valve in the full OPEN position, set OPEN Mechanical Stop Screws (piece #58) (Hex Head
Cap Screw) by loosening Locking Nut (piece #59) (Hex Head Nut). (See Figure 5.10 for orientation.)
2. Using the Handwheel, turn the valve to the OPEN position. Make sure the valve is fully open before
setting the Mechanical Stop.
3. Rotate Mechanical Stop Screw (piece #58) in the CW direction until contact with the Stop Pin (piece
#28) occurs.
4. Back-off Mechanical Stop Screw (CCW direction) approximately 11/2 turns.
5. Retighten Locking Nut.
6. Manually operate the actuator through the open limit to assure setting is correct.
NOTE: The Mechanical Stops are intended to protect the equipment from overtravel if a Limit Switch
fails. The valve should not torque-out against the Mechanical Stop Screw during normal OPEN/
CLOSE cycles.
5.10 Setting the MDPI (Mechanical Dial Position
Indicator)
Piece numbers refer to Figure 5.12.
1. After setting the Limit Switch and Mechanical Stop Settings, manually position the valve in the fully
CLOSED position.
2. Loosen Screw (piece #147) on MDPI.
3. Make sure the MDPI Dial Plate (piece #146) is aligned properly with the Dial Window Retaining
Plate Arrow (piece #108), usually 0% (CLOSED) should align with the arrow. (See Figure 5.12.)
NOTE: If your application uses CW handwheel rotation to OPEN, flip the MDPI Plate over to properly
orient the OPEN and CLOSED position on the MDPI Plate.