Enerpac PRV-8 User manual

POWERFUL SOLUTIONS. GLOBAL FORCE.
Instruction Sheet
PRV-8, PRV-9 PRESSURE REDUCING VALVES
PRVM-2 MANIFOLD
L3062 Rev. A 05/11
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 oce.
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.
WARNING: Wear proper personal
protective gear when operating
hydraulic equipment.
DANGER: To avoid personal
injury keep hands and feet away
from cylinder and workpiece
during operation.
WARNING: Do not exceed equipment
ratings. Overloading causes
equipment failure and possible
personal injury. The pressure reducing valve is
designed for a maximum operating pressure of
350 bar [5000 psi]. Do not use the valve in
circuits where higher pressures are present.
DANGER: 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. Do not remove relief valve.
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.
Index: Page
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1

2
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 with 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.
4.0 PRV-8 AND PRV-9 PRESSURE
REDUCING VALVES
The PRV-8 and PRV-9 remote mount pressure
reducing valves can be used with fittings
and tubing or can be manifold mounted. The
valve section is normally open, and closes
when the cylinder pressure downstream of the
valve reaches the customer adjusted pressure
setting.
When pressure in the incoming side drops
below that of the cylinder side, reverse flow is
allowed, enabling clamped cylinders to unclamp.
Pressure adjustment is through an adjustment
screw. Adjustment is clockwise to increase
the pressure setting and counterclockwise
to reduce the pressure setting. A locknut is
provided to secure the setting.
A 1/8"-27 NPT port on the manifold body allows
the mounting of a gauge to read the cylinder
pressure past the valve section.
Refer to figures 1 and 2 for additional
information.
WARNING: Maximum allowable
system pressure for the PRV-8 and
PRV-9 valves is 350 bar [5000 PSI].
Do not exceed this pressure rating.
5.0 PRVM-2 MANIFOLD
The PRVM-2 manifold is included as part of the
PRV-8 and PRV-9 pressure reducing valves.
If desired, the PRVM-2 manifold may also be
purchased separately.
• Assembling a PRVM-2 manifold and a PRV-3T
valve module will create a PRV-8 pressure
reducing valve.
• Assembling a PRVM-2 manifold and a PRV-4T
valve module will create a PRV-9 pressure
reducing valve.
Refer to figures 3 and 4 for additional
information.
AP
Figure 1, PRV-8 and PRV-9 Valve Function

3
PRV-8 and PRV-9 PRESSURE REDUCING VALVE SPECIFICATIONS
Fluid Temperature Range -13°-176°F [-25°-80°C]
Viscosity Range 150-165 S.U.S. [15-250 cSt]
Hydraulic Oil HLP 23 ISO 3448-1975
Flow Rate 427 Cu.in/min [7,0 l/min] max
Maximum Operating Pressure 5,000 psi [350 bar] {35 MPa}
Adjustment Range (PRV-8) 435-4,350 psi [30-300 bar] {3-30 MPa}
Adjustment Range (PRV-9) 70-2000 psi [5-138 bar] {5-13.8 MPa}
Weight 2.85 lbs [1,3 kg]
AP
A
2.00
1.75
1.56
Ø1.18
.18
8.00
.75
1.32
.50
1.40
.80
.75
.80
.46
.25
.65
1.00
.60
.95
Note: Dimensions are for reference only. All dimensions are in inches unless otherwise indicated.
1/8-27 NPT
GAUGE PORT PLUG
(INCLUDED)
(2) G1/4" PORT PLUGS
(included)
PRESSURE
REDUCING
ADJUSTMENT
(2) 1/16-27 NPT
MANIFOLD PLUGS
(INCLUDED)
(2) MANIFOLD
O-RINGS (INCLUDED)
Figure 2, PRV-8 or PRV-9 Pressure Reducing Valve (includes PRMV-2 Manifold)
With seal nut loose, torque valve tower
lock nut to 52-67 ft-lbs. [70-90 Nm].
(2) M6 X 1 X 45mm
MOUNTING SCREWS
(INCLUDED)
Torque seal nut to
45-60 ft-lbs. [61-81 Nm]
after torquing valve
tower lock nut.

AP
A
2.00
1.75
.18
.75
1.32
1.56
.50
1.40
.80
.75
.80
.46
.25
.65
1.00
.60
.95
Note: Dimensions are for reference only. All dimensions are in inches unless otherwise indicated.
1/8-27 NPT
GAUGE PORT PLUG
(INCLUDED)
(2) G1/4" PORT PLUGS
(INCLUDED)
(2) M6 X 1 X 45mm
MOUNTING SCREWS
(INCLUDED)
(2) 1/16-27 NPT
MANIFOLD PLUGS
(INCLUDED)
(2) MANIFOLD
O-RINGS
(INCLUDED)
4
AP
NOTE: MTG. SURFACE FINISH TO BE AND
63
.004
.25
.65
1.00
.60
.95
(2) Ø 25" FEED HOLES MAX.
Figure 4, Manifold Mounting Pattern
Figure 3, PRMV-2 Manifold Details
Note: Dimensions are for reference only. All dimensions are in inches unless otherwise indicated.
(2) M6 X 1 TAP X 0.50" DEEP MINIMUM

Notes:

Notes:

Notes:

A
ustralia and New Zealand
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ctuant Australia Ltd.
Block V Unit 3
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391 Park Road
Regents Park NSW 2143
(P.O. Box 261) Australia
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ctuant Canada Corporation
6615 Ordan Drive, Unit 14-15
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Toll Free:
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ctuant (China) Industries Co. Ltd.
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WS10 8LQ
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All Enerpac products are guaranteed against
defects in workmanship and materials for as
long as you own them.
For the location of your nearest authorized
Enerpac Service Center, visit us at
www.enerpac.com
Enerpac Worldwide Locations e-mail: [email protected] internet: www.enerpac.com
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