Repair Parts Sheets for this product are available from the Enerpac
web site at www.enerpac.com, or from your nearest Authorized
Enerpac Service Center or Enerpac Sales office.
1.0 IMPORTANT RECEIVING INSTRUCTIONS
Visually inspect all components for shipping damage. Shipping
damage is not covered by warranty. If shipping damage is found,
notify carrier at once. The carrier is responsible for all repair and
replacement costs resulting from damage in shipment.
SAFETY FIRST
2.0 SAFETY ISSUES
Read all instructions, warnings and cautions
carefully. Follow all safety precautions to
avoid personal injury or property damage
during system operation. Enerpac cannot be responsible for
damage or injury resulting from unsafe product use, lack of
maintenance or incorrect product and/or system operation.
Contact Enerpac when in doubt as to the safety precautions and
operations. If you have never been trained on high-pressure
hydraulic safety, consult your distribution or service center for a
free Enerpac Hydraulic safety course.
Failure to comply with the following cautions and warnings could
cause equipment damage and personal injury.
A
CAUTION
is used to indicate correct operating or maintenance
procedures and practices to prevent damage to, or destruction of
equipment or other property.
A
WARNING
indicates a potential danger that requires correct
procedures or practices to avoid personal injury.
A
DANGER
is only used when your action or lack of action may
cause serious injury or even death.
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WARNING:
Wear proper personal protective gear when
operating hydraulic equipment.
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WARNING:
Stay clear of loads supported by hydraulics.
A cylinder, when used as a load lifting device, should
never be used as a load holding device. After the load has
been raised or lowered, it must always be blocked mechanically.
DANGER:
To avoid personal injury keep hands and
feet away from cylinder and workpiece during
operation.
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WARNING:
Do not exceed equipment ratings. Never
attempt to lift a load weighing more than the capacity of
the cylinder. Overloading causes equipment failure and
possible personal injury. The cylinders are designed for a max.
pressure of 350 bar [5,000 psi]. Do not connect a jack or cylinder
to a pump with a higher pressure rating.
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Never
set the relief valve to a higher pressure than the
maximum rated pressure of the pump. Higher settings
may result in equipment damage and/or personal injury.
POWERFUL SOLUTIONS. GLOBAL FORCE.
Instruction Sheet
MHV-1 Manual Holding Valve
L1664
Rev. B
07/16
OPEN
OPEN
CL
OSED
OPEN
OPEN
CL
OSED
Top View
Side View
Plug
1/8-27 NPT
Hydraulic Inlet
1/8-27 NPT
Hydraulic Inlet
Mounting
Holes
The modular Holding Valve allows separate operation
of clamping fixtures with a single pressure source. This
valve is ideal for applications when fluid feed lines are
impractical. If system pressure is interrupted, the valve
will hold the pressure beyond the valve. To release system
pressure, rotate the valve handle in either direction 90° to
release and retract system pressure.
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WARNING:
The system operating pressure must not
exceed the pressure rating of the lowest rated component
in the system. Install pressure gauges in the system to
monitor operating pressure. It is your window to what is happening
in the system.
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CAUTION:
Avoid damaging hydraulic hose. Avoid sharp
bends and kinks when routing hydraulic hoses. Using a
bent or kinked hose will cause severe back-pressure.
Sharp bends and kinks will internally damage the hose leading to
premature hose failure.
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Do not
drop heavy objects on hose. A sharp impact may
cause internal damage to hose wire strands. Applying
pressure to a damaged hose may cause it to rupture.
IMPORTANT:
Do not lift hydraulic equipment by the
hoses or swivel couplers. Use the carrying handle or other
means of safe transport.
CAUTION:
Keep hydraulic equipment away from
flames and heat.
Excessive heat will soften packings and
seals, resulting in fluid leaks. Heat also weakens hose
materials and packings. For optimum performance do not expose
equipment to temperatures of 65 °C [150 °F] or higher. Protect
hoses and cylinders from weld spatter.