Last month's column concluded with my recommendation that you ensure your hydraulic cylinder is rated for the hydraulic psi being used. In cases where this cannot be done—for example having a cylinder rated for 1500 psi and using 2000 hydraulics psi—you can add an inline pressure-limiting valve on the mold to protect the cylinder from failure. For example, with some hydraulic valve gates, the cylinders are not rated for high pressures. In situations where the cylinder may be rated for the pressure, but that amount of pressure is not needed, you can add this valve to protect your moving component.
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