Flowserve LY Series Limitorque Bedienungsanleitung PDF herunterladen (Seite 23)

Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11

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5.9.2 Setting the CLOSED Mechanical Stop on the LY 2001/3001

Table 5.6 – Mechanical Stop and Locknut Screw Sizes

Unit Type Stop Screw Size Locking Nut Size

LY 2001/3001 5/8-16 x 3" 5/8-11

All piece numbers refer to Figure 5.11.

1. Set CLOSE Mechanical Stop Screws (piece #58) (Hex Head Cap Screw) by loosening Locking Nut

(piece #59) (Hex Head Nut).

2. Using the Handwheel, turn the valve to the CLOSE position. Make sure the valve is fully seated

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 1½ turns.

5. Retighten Locking Nut.

6. Manually operate the actuator through the close 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.

Figure 5.11 – Mechanical Stop Set Screw Adjusted to Torque Drive Nut Contact Point on LY 2001

and 3001

#32 Torque Nut

#59 Locking Nut

#58 Mechanical Stop Screw

Mechanical Stop Screw

CLOSED OPEN

#28 Stop Pin and

Mechanical Stop

Screw positioned

at contact point

LY 2001/3001 Top View

CCW to Open

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Flowserve LY Series Limitorque Bedienungsanleitung Seite 23