Nittoh UP-45SV Series, Руководство по эксплуатации и обслуживанию

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5-7 Relief valve adjustment
Range of standard pressure adjustment available is form 58.8 to 68.6MPa. different kind
of a spring is needed to adjust and set at lower pressure than the standard. Contact
NITTOH authorized distributor.
Loosen lock screw on the relief valve and turn the adjusting screw a few turns
counter-clockwise to decrease pressure setting to a lower desired pressure. Clockwise
rotation of the adjusting screw will increase pressure.