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RPC*
PRESSURE AND TEMPERATURE
COMPENSATED
FLOW CONTROL VALVES
OPERATING PRINCIPLEHYDRAULIC SYMBOL
— The RPC
*
valve is a pressure and temperature
compensated flow control valve.
— The flow rate is adjusted with a calibrated knob that
modulates the opening of the control gap and can be
locked in any adjustment position by a screw.
— The flow rate adjustment range is carried out with six
turns of the knob, with indication of the number of turns
made. A one-turn adjustment on the knob, RPC*/M, is
available upon request.
32 300/118 ED
RPC2 RPC3
Maximum operating pressure
Check valve cracking pressure
Minimum pressure difference between E and U
bar
320
0,5
10
250
0,5
12
Maximum controlled flow rates
Minimum controlled flow rate
l/min
22 - 38 -70
0,050
100 - 150
0,120
Ambient temperature range °C -20 / +60
Fluid temperature range °C -20 / +80
Fluid viscosity range cSt 10 ÷ 400
Fluid contamination degree According to ISO 4406:1999 class 20/18/15
Recommended viscosity cSt 25
Mass kg 3,6 7,8
PERFORMANCES
(obtained with mineral oil with viscosity of 36 cSt at 50°C)
SUBPLATE MOUNTING
RPC2 ISO 6263-06
RPC3 ISO 6263-07
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RPC*
1
- IDENTIFICATION CODE
Seals: omit for
mineral oils
V = viton for special
fluids
Series No.
31 for RPC*2
44 for RPC*3
(the overall and mounting
dimensions remain unchanged
from 30 to 39 and from 40 to 49)
Size:
2 = ISO 6263-06
3 = ISO 6263-07
2 - CHARACTERISTIC CURVES
(
values obtained with viscosity of 36 cSt at 50°C)
Pressure compensated
flow control valve
M = single-turn adjustment knob
(omit for six-turn adjustment)
C = incorporated check valve
(Omit if not required)
Temperature compensation
Controlled flow: Size 2 Size 3
N = 22 l/min 100 l/min
S = 38 l/min 150 l/min
70 = 70 l/min
RC = compensating stroke governor
(Omit if not required)
ADJUSTMENT
PRESSURE DROPS ∆p-Q U→E
R P C - T / / / /
KNOB TURNS
( M version )
3 - HYDRAULIC FLUIDS
Use mineral oil-based hydraulic fluids HL or HM type, according to
ISO 6743-4. For these fluids, use NBR seals. For fluids HFDR type
(phosphate esters) use FPM seals (code V).
For the use of other kinds of fluid such as HFA, HFB, HFC, please
consult our technical department. Using fluids at temperatures
higher than 80 °C causes a faster degradation of the fluid and of the
seals characteristics.
The fluid must be preserved in its physical and chemical
characteristics.
4 - PRESSURE COMPENSATION
Two throttles in series are in the valve. The first is an opening
regulated by the knob; the second, piloted by the pressure
upstream and downstream of the first throttle, assures a constant
pressure drop across the adjustable throttle.
In these conditions, the set flow rate value stays constant within a
tolerance range of ± 3% of the maximum flow controlled by the
valve for the maximum pressure variation between inlet and outlet
chambers of the valve.
5 - TEMPERATURE COMPENSATION
A device located on the first throttle which is sensitive to the
temperature fluctuations corrects the position keeping the controlled
flow more or less unaltered even should the oil viscosity change.
The fluctuation of the set flow rate stays within ± 2,5% of the
maximum flow controlled by the valve.
6 - REVERSE FREE FLOW
The RPC* valves, upon request, are supplied with an incorporated
check valve to allow free flow in the direction opposite of the
controlled flow. In this case the valve code becomes RPC*-CT.
7 - COMPENSATING STROKE GOVERNOR
In order to avoid jumps in the actuator when it is started, the RPC
valve can be equipped with a special accessory that controls the
compensating stroke, thus preventing it from making uncontrolled
movements.
Add the suffix RC to the identification code to request this governor.
See paragraph 1.
4
3
E
2
9.5
27
U
76
95
5
82.5
101.5
9.5
2
ø6
1
650
110
ø8.5
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RPC*
8
- RPC2 OVERALL AND MOUNTING DIMENSIONS
dimensions in mm
9 - RPC3 OVERALL AND MOUNTING DIMENSIONS
dimensions in mm
1
Adjustment knob.
Anticlockwise rotation to increase flow rate
2
Mounting surface with sealing rings:
n° 2 OR type 119 (15.08x2.62)
3 Indicator of number of knob turns
4 Compensating stroke governor (optional)
5 Knob locking screw
1
Adjustment knob.
Anticlockwise rotation to increase flow rate
2
Mounting surface with sealing rings:
n° 2 OR type 3106 (26.65x2x62)
3 Indicator of number of knob turns
4 Compensating stroke governor (optional)
5 Knob locking screw
MOUNTING SURFACE:
ISO 6263-06-05-*-97
(CETOP 4.5.2-2-06-320)
MOUNTING SURFACE:
ISO 6263-07-09-*-97
(CETOP 4.5.2-2-07-250)
Fastening bolt:: 4 SHC screws M10x90 - ISO 4762
Tightening torque:: 40 Nm (A8.8)
Threads of mounting holes: M10x16
Fastening bolt: 4 SHC screws M8x60 - ISO 4762
Tightening torque: 20 Nm (A8.8)
Threads of mounting holes: M8x13
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RPC*
REPRODUCTION IS FORBIDDEN. THE COMPANY RESERVES THE RIGHT TO APPLY ANY MODIFICATIONS.
10 - SUBPLATES
(see catalogue 51 000)
RPC2 RPC3
Type
PMRPC2-AI4G
rear ports
PMRPC3-AI6G
rear ports
Port dimensions 1/2” BSP 1” BSP
