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

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5-2 Pressure and piping
① Composition of hydraulic equipment system WARNING
When a pump, high-pressure hose(s), cylinder, valve, couplings are connected together,
always check product limitations regarding pressure ratings and load capacities. The
system operating pressure must not exceed the pressure rating of the lowest rated
component in the system.
② Pressure gauges
Always install or prepare a pressure gauge in-line form the pump in order to check
pressure developed.
③ Piping CAUTION
Use wrapping of Teflon tape on hoses fittings, valves and couplers. Make sure all hose
connections are tight-use proper tools to tighten connections with reference to the
following table. Do not over tighten the connections.
NPT,PT sizes Tightening torque N-m(kgf-m)
1/8” 13-14 (1.3-1.4)
1/4” 30-40 (3.0-4.0)
3/8” 60-70 (6.0-7.0)
1/2” 100-110 (10.0-11.0)
Make sure that tape not shed into hydraulic system, causing damage. Trim loose ends.
5-3 High pressure hoses
① Hose installation WARNING
Install hoses, leaving something in reserve, because high-pressure hoses expand and
contract more or less when full pressure is applied. Be careful that the hoses do not rub
against other solid materials.
Never allow the hoses to kink, twist, curl or bend so tightly that oil flow within hoses are
blocked or restricted. Do not clamp the hoses, causing troubles.
② Hose handling DANGER
Never drop heavy things against the hoses, causing bursting of hoses or serious accident.
Do not subject the hoses to any potential hazard (fire, extreme heat or cold, heavy impact
or sharp surfaces), which might rupture or weeken the hoses. Never pull hoses to move or
lift equipment connected with hoses.
Should a hose ever burst or ruptured, immediately stop operating the pump before
attempting to remedy the situation. Never attempt to grasp a leaking hose under
pressure with your hands. The force of the escaping hydraulic fluid could cause serious
and permanent injury.