Warning For Disassembly And Inspection; Disassembly - Yoshitake GD-26G Product Manual

4.6 Warning for disassembly and inspection

1. Completely discharge the pressure inside of the product, piping and equipment before disassembly
and inspection. Disassembly and inspection must be done by experienced professional or valve
manufacturer.
* Failure to follow this notice may result in scalds, injury or contamination on the surroundings due
to the residual pressure.

4.7 Disassembly

1. Exhaust pressure in the piping completely and check if pressure is 0 MPa by pressure gauge.
2. Remove the domed cap nut, turn the adjusting screw [14] counterclockwise, and set the spring
[15] free (no load).
3. Remove the bolts of the spring chamber [2] and remove the spring chamber [2]. Then take out the
spring [15] and the spring plate [13].
4. Remove the nut, and then the diaphragm shell [12], and diaphragm [9].
5. Remove the set screws of the valve seat [3], and remove a set of the valve seat.
Nominal size 15A to 50A: Attach the diaphragm shell [12] to the spindle [4], and pull it up.
Nominal size 65A to 100A: Screw the bolt into the valve seat [3], and pull it up.
Warning
10
■ EP D T-088■