FLOW CONTROLS
FR12-33 Flow Regulator, Pressure Compensated
USASI/ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
5.374.1
Flow vs. Turns at 104 bar/1500 psi
75.6/20
60/16
45/12
30/8
15/4
245
TURNS
FLOW lpm/gpm
13
DESCRIPTION
A screw-in, cartridge-style, adjustable orifi ce, pressure-compensted, manually-
operated, bypass-type hydraulic fl ow regulating valve. It can be used as a priority-type
fl ow regulator or a restrictive-type 2-way fl ow regulator when the bypass port
is blocked.
OPERATION
The FR12-33 maintains a constant fl ow rate from ➂ regardless of load pressure
changes in the system downstream of
➂, or in the bypass leg at ➁. Reverse fl ow
(
➂ to ➀) bypasses the control orifi ce.
The regulated fl ow increases from closed to fully open, with counter-clockwise
rotation of the knob.
Note: When used as a bypass fl ow control in applications where the priority fl ow port
will be blocked by external valving, bypass pressure drop will increase unless a small
amount of leakage is provided for the priority port. Consult factory.
FEATURES
• Bypass port ➁ may be fully pressurized.
• Hardened steel parts for long life.
• Quiet, modulated response.
• Industry common cavity.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow Rate: 3-ported regulated fl ow: 0 to 68 lpm (0 to 18 gpm)
2-ported regulated fl ow: 0 to 45 lpm (0 to 12 gpm)
Input Flow: 3-ported: 76 lpm (20 gpm) nominal; 114 lpm (30 gpm) max.
Internal Leakage: 0.12 lpm (7.3 cu. in./minute) at port 3, at 207 bar (3000 psi)
Adjustment Torque Required: 1.7 Nm (15 inch-pounds) at 207 bar (3000 psi)
Operating Temperature: -40 to 100°C with standard Buna N seals
-26 to 204°C with Fluorocarbon seals
-54 to 107°C with Polyurethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-3; See page 9.112.1
Cavity Tool: CT12-3XX; See page 8.600.1
Seal Kit: SK12-3X-MM; See page 8.650.1
Knob Kit: Part Number 6113160
3-Ported:
Regulated Flow vs. Pressure
at 76 lpm/20 gpm Input Flow
32 cST/150 ssu oil at 40°C
60/16
76/20
91/24
45/12
30/8
15/4
FLOW lpm/gpm
PREG > PBYPPBYP > PREG
276
4000
276
4000
138
2000
0 bar
0 psi
138
2000
1 TURN
2 TURNS
3 TURNS
4 TURNS
5 TURNS
Pressure Drop vs. Reverse Flow
from ➂ to ➀
240 bar/3500 psi Inlet Pressure
32 cST/150 ssu oil at 40°C
34.5/500
27.6/400
20.7/300
13.8/200
6.9/100
PRESSURE DROP bar/psi
15.1
4
FLOW lpm/gpm
60.6
16
75.7
20
45.4
12
30.3
8
CLOSED
5
TURNS
HYDRAFORCE
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Cartridge: Weight: 0.34 kg. (0.70 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
0.98 kg. (2.15 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.012.1.
DIMENSIONS
MATERIALS TO ORDER
FR12-33
5.374.2
Porting
Cartridge Only 0
SAE 10 10T
SAE 12 12T
SAE 16 16T
1/2 in. BSP* 4B
3/4 in. BSP* 6B
*BSP Body; U.K. Mfr. Only
FR12-33__ - __ __ __ - __
Adjustment Option
Extended Shaft Only
Blank
3/16" Hex Allen Head A
Option “A” with Cover Cap C
Plastic Knob E
Seals
N Buna N (Std.)
V Fluorocarbon
P Polyurethane
®
HYDRAFORCE
HYDRAFORCE
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®
Blue rectangles are links to other catalog pages.
