Tritech Merlin, Руководство по эксплуатации продукта

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Installation Merlin
0711-SOM-00001, Issue: 03 9 © Tritech International Ltd.
Fittings
Use standard heavy-duty worm drive clips. Use of heavy-duty two bolt clamps will result in
damage to the hose connections on the pump unit.
Clean Suction Intake Screen
It is recommended that a
Tritech International Ltd
supplied suction strainer is used with the
pump. If using another strainer it must meet the following specifications:
• Maximum hole size: square mesh of 4mm aperture or circular perforations of 6mm
diameter.
• Minimum total free flow area: 0.025m²
The pump should not be operated in any circumstances without a suction screen.
Dredge Suction Nozzle
Suction nozzles should be designed with a nozzle cross-section area of approximately
80000mm²
Smaller nozzles may be used but material removal rates will be reduced. Larger nozzles are
of no benefit and will reduce performance.
A nozzle guard should be fitted that will pass a maximum of a 60mm diameter sphere or
50mm sided cube. The pump can pass single objects of a larger size, but if it takes in a
stream of objects then blockages can occur.
Jet Nozzle
The recommended sizes are 12 to 18mm diameter or an equivalent area.
The optimum size will need to be determined by trial because the water output from the power
pump will vary depending on the oil pressure and flow available from the ROV hydraulic
system.
3.3. Hydraulics
Oil
The pump should be operated using a premium grade mineral based hydraulic oil of ISO
VG 22 to 23
Filtration
The hydraulic system filtration must be to a minimum of 10μm absolute standard. A 10μm
nominal standard is regarded as inadequate.