EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009H-270.A
An Eaton Brand
H
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
PFR2-16 - Flow Regulator
Limited range adjustable, priority pressure compensated
114 L/min (30 USgpm) • 210 Bar (3000 psi)
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
Typical Flow Regulation
Cartridge only
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.
0 1000 2000500 1500 2500
25
20
15
10
5
0
100
80
60
40
20
0
75 100 175 210
Back pressure - psi
Back pressure - bar
0
3000
A
B
A
B
14035
Priority (regulated) flow rate - L/min
(21,8 cSt oil @ 49°C)
Priority (regulated) flow rate - USgpm
(105 SUS oil @ 120°F)
Sectional View
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.
Ratings and Specification
Performance data is typical with fluid at 21,8 cSt (105 SUS) and 49°C (120°F)
Typical application pressure (all ports) 210 bar (3000 psi)
Cartridge fatigue pressure (infinite life) 210 bar (3000 psi)
Rated flow Maximum inlet flow 151 L/min (40 USgpm)
Maximum regulated flow 114 L/min (30 USgpm)
Temperature range -40° to 120°C (-40° to 248°F))
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 flow rate accuracy under
standard test conditions and within the above ranges
Cavity C–16–3
Fluids All general purpose hydraulic fluids such as
MIL-H-5606, SAE 10, SAE 20 etc.
Filtration
Cleanliness code 18/16/13
Standard housing material Aluminum or Steel
Weight cartridge only 0,43 kg (0.95 lbs)
Seal kit 565811 (Buna-N)
889610 (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
A - Port 3, priority (regulated) outlet pressurized
B - Port 2, bypass outlet pressurized
Note: The flow adjustment
is from the factory - set
maximum flow rate down to
50% of that factory set flow
rate.
1
3
2
3
2
1
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 H-271.A
An Eaton Brand
H
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
10.3
(0.41)
114.6
(4.50)
93.68
(3.688)
2 x 8.74
(0.344)
88.9
(3.50)
114.3
(4.50)
57.0
(2.24)
28.4
(1.12)
31.8
(1.25)
31.8
(1.25)
107.9
(4.25)
19.0 HEX
(0.75)
38.1 HEX
(1.50)
3
1
2
PFR2-16 - Flow Regulator
Limited range adjustable, priority pressure compensated
114 L/min (30 USgpm) • 210 Bar (3000 psi)
Dimensions
mm (inch)
3
2
1
"K" Adjustment,
Ø51 (2.0)
38,1
(1.50)
hex
Ø26,95 (1.061)
Ø28,55 (1.124)
104,0
(4.09)
1.312" -12 Thd.
73,0
(2.87)
"S" Adjustment
9,6 (0.37) hex
107,2
(4.22)
"C" Adjustment
19,0 (0.75) hex
1
Function
PFR2 - Priority ow regulator
2
Size
16 - 16 size
3
Seals
Blank - Buna-N
V - Viton
®
4
Adjustment
C - Cap
K - Knob
S - Screw
Model Code
2 31
PFR2 16 (V)
5
***
6
*.*
4
*
7
00
Code Port Size Housing Number
Aluminium Aluminum
Light Duty Fatigue Rated
0 Cartridge only
12T SAE 12 566152 –
6B 3/4" BSPP 02-175465 –
10H SAE 10 – 876721
12H SAE 12 – 876723
4G 1/2" BSPP – 876720
6G 3/4” BSPP – 876722
See section J for housing details.
5
Port Size
6
Factory Set Flow Rate
(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”)
SS - 316 stainless steel
external components
Cartridge Only
Basic Code
PFR2-16
Torque cartridge in
aluminum housing to
108–122 Nm (80–90 ft lbs).
Installation Drawing
– – –––
