The JNF torsion bar double action spring hinge can be adjusted by simply turning the torsion bar and inserting the locking pin.
The top hinge should always be placed higher than you would normally fit a standard butt hinge. Its fine to locate the bottom hinge where a butt hinge would generally sit These torsion bar hinges are often used to replace both Rising Hinges and Falling Hinges as they can do the job of both by the way that you tension the torsion bar. Rising hinges are not used much these days due to the situation where the doors can be lifted of and used to vandailize property.
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