Enerpac MVP-5 User manual

Company Registered in England No: 4167649 VAT Registration No: 732 5692 25 BS EN ISO 9001:2008 No: LRQ 0964389
[phone]
[email protected]
Hyquip Limited New Brunswick Street Horwich Bolton Lancashire BL6 7JB UK
www.hyquip.co.uk/web/index
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.
ACAUTION is used to indicate correct operating or maintenance
procedures and practices to prevent damage to, or destruction of
equipment or other property.
AWARNING indicates a potential danger that requires correct
procedures or practices to avoid personal injury.
ADANGER is only used when your action or lack of action may
cause serious injury or even death.
WARNING: Wear proper personal protective gear when
operating hydraulic equipment.
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.
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.
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.
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.
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.
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.
DANGER: Do not handle pressurized hoses. Escaping oil
under pressure can penetrate the skin, causing serious
injury. If oil is injected under the skin, see a doctor
immediately.
WARNING: Only use hydraulic cylinders in a coupled
system. Never use a cylinder with unconnected couplers. If
the cylinder becomes extremely overloaded, components
can fail catastrophically causing severe personal injury.
IMPORTANT: Hydraulic equipment must only be serviced
by a qualified hydraulic technician. For repair service,
contact the Authorized ENERPAC Service Center in your
area. To protect your warranty, use only ENERPAC oil.
WARNING: Immediately replace worn or damaged parts by
genuine ENERPAC parts. Standard grade parts will break
causing personal injury and property damage. ENERPAC
parts are designed to fit properly and withstand high loads.
®
®
Instruction Sheet
Sequence Valves
MVP-5,WVP-5, MVPM-5
EIS 57.111-2 Rev. A 10/00

Company Registered in England No: 4167649 VAT Registration No: 732 5692 25 BS EN ISO 9001:2008 No: LRQ 0964389
[phone]
[email protected]
Hyquip Limited New Brunswick Street Horwich Bolton Lancashire BL6 7JB UK
www.hyquip.co.uk/web/index
2
3.0 DESCRIPTION
The MVP-5, WVP-5 and MVPM-5 pressure sequence valves will
not provide hydraulic pressure to the cylinder until the pre-
determined pressure setting is met. When the valve opens,
pressure on the secondary side (going out of the valve) will
increase to the pressure coming into the valve. The MVPM-5 can
be both pipe connected or manifold mounted.
The start of the secondary operations is controlled by an
adjustment screw at the top of the valve. Turning the set screw
clockwise will increase the setting.Turning the set screw counter-
clockwise will decrease the pressure setting.This pressure setting
can be adjusted between 35 bar [500 psi] and 350 bar [5000 psi].
An internal bypass check valve is used to provide reverse free oil
flow through the valve. The maximum flow rate is 6 l/min
[366 in3/min].
4.0 INSTALLATION
Sequence valves should be mounted either vertically with the
spindle pointing upwards, or horizontally. Mount the sequence
valve on the secondary branch of the circuit with input flow from
the primary line plumbed into the“P”port and the output flow to the
branch plumbed to the “A” port. Provisions should be made for
reading pressure at both the “P” and “A” ports of the valve.
Set the sequencing pressure by connecting the “A” port of the
sequence valve to tank. Use a tee fitting in the branch line to
accomplish this.Adjust the spindle until the proper pressure is read
from a gauge at the “P” port.
ATTENTION: Do not unscrew the spindle body (see
illustration 1) when adjusting the valve. Unscrewing the
spindle body will influence the performance of the valve.
Disconnect the tank line from the “A” port branch. Cycle the
hydraulic circuit and confirm correct operation.
NOTE: Air may need to be bled from the system.
Illustration 1 - MVP-5, WVP-5 and MVPM-5
Illustration 2 - Pressure Drop vs Oil Flow
Illustration 3
4.0 TROUBLESHOOTING TABLE
1.04
[26,5]
1.97
[50,0]
.49
[12,5]
.51
[13,0]
ø .557 2X
[14,15]
Manifold Port
-110 O-ring
TYP. 2X
1.46
[37,0]
1.97
[50,0]
00123456789101112
61 122 183 244 305 366 427 488 549 610 671
5
10
15
20
25
30
35
0
73
145
218
290
363
435
508
Oil Flow (in3/min)
Oil Flow (l/min)
Pressure Drop (psi) Pressure Drop (bar)
P-A
A-P
Opening pressure of check valve (A-P) is 1,4 bar [20 psi]
A
Spindle Body
P
Problem Possible Causes
Premature valve shifting. Check that the setting was not
inadvertently changed or that the
valve is bound with contaminants.
Delayed valve action. Check that the setting was not
inadvertently changed, that the valve
is bound with contaminants or that
the flow rate has increased.