FLOW CONTROLS
FR50-28 Regulator, Pressure-Compensated,
USASI/ISO:
SYMBOLS
PERFORMANCE
5.320.1
DESCRIPTION
A screw-in, cartridge-style, adjustable, pressure-compensated, restrictive-type
hydraulic fl ow regulating valve.
OPERATION
The FR50-28 maintains a constant fl ow rate out of ➁ regardless of load pressure
changes in the circuit downstream of
➁ or upstream of ➀.
The regulated fl ow increases from closed to fully open with counter-clockwise rotation
of the adjustment screw. The valve will maintain the set fl ow regardless of pressure
variations on the regulated or inlet port. Reverse fl ow from
➁ to ➀ bypasses the
control orifi ce.
FEATURES
• Hardened parts for long life.
• Quiet, modulated response.
• Cost-effective cavity.
RATINGS
Operating Pressure: 345 bar (5000 psi)
Flow Rating: 0.8–34 lpm (0.2–9.0 gpm)
Flow Maintenance: ±10% through full pressure range
Internal Leakage
➀ to ➁: 35 ml/minute (2.5 cu. in./minute) at 345 bar (5000 psi)
Temperature: -40 to 120°C
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: VC10-2; See page 9.110.1
Cavity Tool: CT10-2XX; See page 8.600.1
Seal Kit: SK10-2X-M; See page 8.650.1
HYDRAFORCE
.com
®
1
2
26.5/7
30.3/8
34.1/9
37.9/10
22.7/6
11.4/3
15.1/4
18.9/5
7.6/2
3.8/1
245
TURNS
FLOW lpm/gpm
13
FLOW vs. TURNS
35 bar/500 psi Inlet Pressure
32 cSt/150 sus oil at 40nC
Regulated Flow vs. Pressure Drop
32 cSt/150 sus oil at 40nC
69
1000
PRESSURE DROP bar/psi
207
3000
276
4000
345
5000
138
2000
26.5/7
30.3/8
34.1/9
37.9/10
22.7/6
11.4/3
15.1/4
18.9/5
7.6/2
3.8/1
FLOW lpm/gpm
Pressure Drop vs. Reverse Flow
from to ~
32 cSt/150 sus oil at 40nC
27.6/400
20.7/300
13.8/200
6.9/100
PRESSURE bar/psi
7.6
2.0
FLOW lpm/gpm
30.3
8.0
22.7
6.0
15.1
4.0
CLOSED
OPEN
HALF
OPEN
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