Installation Specifications
1. The cylinder must be encased in an assembly of polyvinyl chloride
(PVC) pipe. The pipe wall thickness must not be less then 0.03
inches. The inside diameter of the pipe should be large enough
to allow not less then one inch (1") of UnionGARD 160 to completely
surround the cylinder.
2. The PVC pipe assembly must be capped at the bottom and all joints
must be solvent welded or heat welded according to the pipe
manufacturer's recommendations to insure water tightness.
3. The elevator shaft must permit the cylinder and PVC casing to be
set plumb in the proper location.
4. Install the pipe and cylinder assembly in the shaft and obtain set
plumb location. Back fill the outside of the PVC casing with clean sand
and simultaneously fill the inside of the annulus with UnionGARD 160.
These operations must be performed simultaneously in order to maintain
pressure equilibrium on the PVC wall. The hydraulic cylinder may touch
the PVC pipe to obtain vertical plumb.
5. Seal the well opening at the pit floor with hydraulic quick-setting cement.
An inspection orifice must extend through the cement seal into the annulus
between the PVC pipe and the elevator cylinder.
See Diagram ⬇️
