New Headwall Installation Method

Step-by-Step Guide for Installation

1. Secure all anchor bolts in proper position in the forms, check the size, projection and alignments to conform to requirements show in our illustration. Do not mount penstock to misaligned bolts.
2. Each bolt has been provided with 2 nuts for proper mounting of penstock. In setting the forms, provide a recess around the perimeter of the gate. Allowing easy adjustment of the back nut and make sure the sufficient grout space must be left for adjustment of the back nut.
3. After concrete has been poured and form has been stripped, place one nut on the anchor bolt. Place the completely assembly penstock into position carefully. Place the second nut on the anchor bolt and bring bolt nuts into finger-tight contact with the penstock’s frame, aligning is as necessary. Figure #1.
4. Check the clearance between gate and frame by the 0.1mm feeler gauge. If find out some gaps, check to see if penstock has been warped during install. Adjust the nuts to bring the penstock into flatness. Figure #2.
5. After the penstocks properly set, grout in the space between frame and headwall using a non-shrink material. Figure #3. Check for voids carefully.
6. Tighten all nuts uniformly. Do not over tighten cause the uneven surface. Penstock now is ready for install operation. Figure #4.

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