EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009H-280.A
An Eaton Brand
H
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
PFR12-16 - Flow Regulator
Adjustable, priority type, pressure compensated
114 L/min (30 USgpm) • 350 bar (5000 psi)
Description
These valves are priority flow
regulators. The flow (and
actuator speed) will be largely
independent of the load and
the pressure conditions.
If used to regulate flow from
a fixed supply, for example
a standard gear or piston
pump, the valve will pass the
required flow and any surplus
flow will be diverted to the
bypass port. The bypass flow
may be used for a secondary
circuit whether the secondary
pressure requirement is higher
or lower than the regulated
pressure.
The valve inlet pressure will
be approximately 7 bar (100
psi) more than the regulated
or bypass pressure, whichever
is higher.
Operation
Inlet flow passes through the
fixed orifice and the radial
holes in the spool/sleeve
assembly then out of the
regulated port. The pressure
drop across the orifice is
sensed at each end of the
spool, producing a force
which, at the required flow
rate, overcomes the spring
force. The resultant movement
of the spool regulates the flow
by opening the radial valve
ports to the bypass port and
closing the regulated flow
ports.
The valve will pass flow in
the return direction but this
is restricted by the flow path
through the control orifice.
Features
Cartridge construction gives
versatility of application. A
valve may be fitted into a
line body, a custom designed
Hydraulic Integrated Circuit or
directly into a cylinder or other
actuator. Leakproof adjust
screw gives easy, accurate
adjustment to required flow
setting. Hardened and ground
working parts give accurate
flow control and long
working life.
Sectional View
Back pressure - psi
0 500 1000 1500 2000 2500 3000
Priority flow rate - USgpm
(105 SUS oil @ 120
0
F)
15
10
5
0
25
20
Priority flow rate - L/min
(21,8 cSt oil @ 49
0
C)
0
20
40
60
80
100
Back pressure - bar
0
210
35 70 100 140 175
A
A
B
B
Ratings and Specifications
Performance data is typical with fluid at 21,8 cSt (105 SUS) and 49° C (120° F)
Typical Application pressure (all ports) 350 bar (5000 psi)
Cartridge fatigue pressure (infinite life) 350 bar (5000 psi)
Rated flow Maximum inlet flow 151 L/min (40 USgpm)
Maximum regulated flow 114 L/min (30 USgpm)
Flow regulation accuracy 1,9-10,9 L/min (0.5-2.9 USgpm) ±15%*
11,4-114 L/min (3-30 USgpm) ±10%*
* Factory set maximum priority flow rate accuracy under standard test conditions and within the above ranges
Temperature range -40° to 120°C (-40° to 248°F)
Cavity C-16-3
Fluids All general purpose hydraulic fluids such as:
MIL-H-5606, SAE 10, SAE 20, etc.
Filtration 18/16/13
Standard housing materials Aluminum or Steel
Weight cartridge only 0,43 kg (0.95 lb.)
Seal kit 565811 (Buna-N)
889610 (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Typical Flow Regulation
Performance Data
A - Port 3, priority (regulated outlet) pressurized.
B - Port 2, (bypass outlet) pressurized.
1
3
2
3
2
1
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 H-281.A
An Eaton Brand
H
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
PFR12-16 - Flow Regulator
Adjustable, priority type, pressure compensated
114 L/min (30 USgpm) • 350 bar (5000 psi)
Code Port Size Housing Number- Body Only
Aluminum
Fatigue rated Steel
0 Cartridge only
A10H SAE 10 876721
A12H SAE 12 876723
A4G 1/2” BSPP 876720
A6G 3/4” BSPP 876722
S4G 1/2” BSPP 02-175131
S6G 3/4” BSPP 02-175132
S10T SAE 10 02-175129
S12T SAE 12 02-175130
See section J for housing details.
Dimensions
mm (inch)
Model Code
1 Function
PFR12 - Priority flow
regulator
2 Size
16 - 16 Size
3 Seals
Blank - Buna-N
V - Viton
®
4 Adjustment Means
C - Cap
K - Knob
S - Screw
6 Factory set ow rate,
nominal
(Specify in USgpm)
Range 1,9-114 L/min
(0.5-30 USgpm)
7 Special features
00 - None
(Only required if valve has special
features, omitted if “00.”)
PFR12 16 (V) * ** *.* 00
1 2 3 4 5 6 7
WARNING
Aluminum housings
can be used for
pressures up to 210 bar (3000
psi) Steel housings must be
used for operating pressures
above 210 bar (3000 psi).
•
5 Port Size
Note: Torque cartridge in
aluminum housing to
108-122 Nm (80-90 ft. lbs)
Note: Torque cartridge in steel
housing to 136-149.6 Nm
(100-110 ft. lbs)
Cartridge Only
Basic Code
PFR12-16
Installation Drawing (Steel)
– – – ––
3
2
1
"K" Adjustment,
Ø51 (2.0)
38,1
(1.50)
hex
Ø26,95 (1.061)
Ø28,55 (1.124)
108.2
(4.26)
1.312" -12 Thd.
73,0
(2.87)
"S" Adjustment
9,6 (0.37) hex
112.1
(4.41)
"C" Adjustment
19,0 (0.75) hex
88.9
(3.50)
76.20
(3.000)
12.7
(0.50)
101.6
(4.00)
2 X Ø 10.31
(0.406)
25.4
(1.00)
1
3
25.4
(1.00)
25.4
(1.00)
54.0
(2.13)
2
108.0
(4.25)
100.8
(3.97)
