Shafer RAP R61-SW-4 Series Limit Switch Adjustment Procedure Manuals & Guides

RAP R61: Limit Switch Adjustment Procedure

Limit Switch-107640-SW4
05/09/11

SW4 Series Limit Switch Adjustment
Procedure

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RAP R61: Limit Switch Adjustment Procedure

Limit Switch-107640-SW4

05/09/11

Sw4 Series Limit Switch Assembly

SW4 Limit Switch Adjustment Procedure

SERVICE

Shafer rotary position indicating switches, Switchpak Models SW4, are supplied with a
maximum of 8 switches, adjustable through 360 angular degrees of shaft rotation. The
enclosure is suitable for installation in Class I, Div. 1 Group C and D Hazardous Locations.

SETPOINT ADJUSTMENT

WARNING: Disconnect Electrical Power Supply Before Beginning Procedure

1. Determine valve operator position, open or closed, by comparing arrows on the Switch
Position Indicator to name tags on operator.

2. Once position is determined, remove the limit switch assembly’s Dome Cover by
rotating counter clockwise from base.

3. Located on the actuator shaft are both Actuator Cams and Spacer Rings. The Spacer
Rings have a smooth finish on the outer edge while the Actuator Cams have teeth
around the edge and an extended lobe on a portion of the edge to cam actuate the
switch. (See illustrations on sheet 2 and 3.)

4. Setpoints are factory set per wiring diagram. To adjust, loosen the top Jam Nut by ¼ to
½ turns counter-clockwise. Flats are provided on the camshaft for loosening the Jam
Nut.

5. The Actuator Cams are spaced so that they will operate one limit switch only. The limit
switches should be actuated from the Ramp Side of the actuating lever on the switch.

6. With the valve operator position determined, rotate the Actuator Cams so they trip the
limit switches on the appropriate side. The Actuator Cams can be adjusted by hand,
using a standard screwdriver. The Spacer Rings are keyed to the shaft. This allows
one Actuator Cam to be adjusted without disturbing the Cam above or below.

NOTE: The operator will rotate in a clockwise direction to close and counter-clockwise to
open the valve. Open Side switches are identifies as ZSOA through ZSOD and Close Side
switches as ZSCA through ZSCD.

7. With one set of cams positioned, partially tighten the Jam Nut and rotate the valve
operator to the end of the opposite stroke.

Page 1

RAP R61: Limit Switch Adjustment Procedure

Limit Switch-107640-SW4

05/09/11

Sw4 Series Limit Switch Assembly

8. Loosen the Jam Nut and repeat step #6.

9. With both sets of Cams positioned properly, tighten the Jam Nut. Torque the Jam Nut
to 35 Foot Lbs.

10. Before reassembling the Limit switch assembly, rotate the valve operator open and
closed to verify proper switch settings.

11. If the switch settings are found to be proper, reinstall the limit switch Dome Cover,
Weather Seal and Position Indicator.

12. Should the switch settings not be correct, loosen the Jam Nut and readjust accordingly.

I

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RAP R61: Limit Switch Adjustment Procedure

Limit Switch-107640-SW4

05/09/11

Sw4 Series Limit Switch Assembly

If any further information is required, please feel free to contact:

EMERSON PROCESS MANAGEMENT VALVE AUTOMATION, INC.

2500 Park Avenue West

Mansfield, Ohio 44906

Phone: [phone]

Fax [phone]

Please visit our website for up to date product data. www.shafervalve.com

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