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5.17.2 Pressure Disk Installation
1. Install the manifold to the nozzle.
2. Refer to the General Assembly drawing for pressure disk dimensions
before calculating the pressure valve disk height.
3. Grind equal amounts from each side of the pressure disk to give 0 to
0.025 mm (0.001 in.) cold clearance and retain maximum strength of
the ‘V’ form. Some systems require a larger air gap, refer to the General
Assembly drawing.
4. Remove the sharp corners after grinding and clean the disk well to ensure
no grinding dust remains on the disk.
5. Install the pressure disk spring dowel to the manifold.
6. Install the pressure disk to the manifold.
Grind equal amounts Stone sharp corners
5.17.3 Pressure Disk: Final Grinding Not Required
Figure 5-30 Optional pressure disk mounting detail
Alternate Method - Air gap adjustment from top clamp or hydraulic plate.
1. Calculate and machine the nozzle bore seat with additional air gap value.
(Example: Flange Manifold Pressure disk Air
gap value)
2. Install the nozzle into the manifold plate.
3. Install the manifold to the nozzle.
4. Refer to the General Assembly drawing for pressure disk locations.
5. Measure the gap between the top of the manifold plate and the top of the
pressure disk. Ensure that it matches the air gap value on the General
Assembly drawing.
5-38
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Hot Runner User Manual