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APTech Miscellaneous Instructions #12365701

AP3657, Panel Mount

Revision 2

February 5, 2013

Page 1 of 2 12365701.doc

* A printed copy of this document is uncontrolled unless it shows a CONTROLLED COPY stamp in red. *

Note: This procedure is intended for panel mount of AP/AZ/AK/3657/4657 Series valves.

Note: Recommended panel hole diameter: 0.78 inch (19.8 mm).

A. Required Tools and Equipment

• 1/8 inch hex bit and 20 in·lbf (2.3 Nm) torque wrench. Optionally a 1/8 inch hex key may be

used if an appropriate torque wrench cannot be obtained.

• 5/64 inch hex bit and 20 in·lbf (2.3 Nm) torque wrench. Optionally a 5/64 inch hex key may be

used if an appropriate torque wrench cannot be obtained.

• 1 inch wrench (open end or adjustable).

B. Knob Removal (Refer to Figure 1)

1. Remove the valve from the double plastic bag.

2. Close the valve by turning the knob (#1) fully clockwise. The valve is completely closed when

the roller on the side of the indicator plate (#2) slides into the vertical slot on the bottom of the

knob. At the same time word “CLOSED” becomes fully visible through the knob window.

Note: Remember the orientation of the knob in the “closed” position so that it may be re-oriented

in the same position during re-assembly.

3. Use a 1/8 inch hex key to unscrew the shoulder screw (#3). Remove the lock stem (#6) together

with the shoulder screw from the valve.

4. Remove the spring (#5) from the valve.

5. Lift up the knob (#1) to remove it from the valve.

6. Use a 5/64 inch hex key to loosen the two set screws (#4) a couple of turns.

7. Lift up the indicator plate (#2) to remove it from the valve.

C. Panel Mount (Refer to Figure 1)

1. Remove the panel mount nut (#8) from the unit.

2. Place the valve through the panel hole, position the valve as desired, connect the valve into piping

system and replace the panel mount nut onto the unit.

3. Using a 1inch wrench, tighten the panel mount nut firmly against the panel.

D. Knob Replacement (Refer to Figure 1)

1. Place the knob (#1) on top of the indicator plate (#2) so that the vertical slot on the bottom of the

knob fits onto the roller on the side of the indicator plate.

Note: the word “CLOSED” should be visible through the knob window.

2. Holding both parts just above the stem (#7), orient the knob window to the desired “closed”

location and then slide the knob down to engage the spline connection with the stem. Verify

again that the roller is inside the vertical slot and “CLOSED” reads through the knob window.

3. Holding the indicator plate down, tighten the two set screws (#4) to 20 in·lbf (2.3 Nm) using a

5/64 inch hex bit.

4. Place the spring (#5) inside the knob center hole, and then put the lock stem (#6) on the top of

the spring.

5. Secure the knob with the shoulder screw (#3), tightening it to 20 in·lbf (2.3 Nm) using a 1/8 inch

hex bit.

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