Functional Description
Pressure compensated flow control valves VSS2-062 are designed
to provide adjustable controlled flow rates independent of changes
in pressure and temperature.
They consist basically of housing (1), sleeve (2), throttling spool (3),
spring (4), pressure compensator (5) and hand knob (7) with the
respective setting mechanism.
The valve housing is phosphate coated.
Flow control valve VSS2-062-xxQ/Jx0-1
(without external pilot closing of pressure compensator)
Flow throttling in direction A ® B takes place at the throttling area (8)
which can be adjusted by hand knob (7). To ensure the flow rate
stability in port B, a pressure compensator (5) is located behind the
throttling area (8).
The spring (4) pushes both the throttling spool (3) and the pressure
compensator (5) into their extreme positions, and provided that there
is no flow through the valve, holds the pressure compensator open.
An introduction of flow to port A exposes inlet pressure through
orifice (9) to the bottom area of the compensator spool and causes
this spool to move in closing direction, thus decreasing the pressure
difference at the throttling area (8). The movement of the
compensator spool stops as a new equilibrium is reached. The
pressure compensator compares continuously the pressure
difference at the throttling area (8) with the amount preset by the
spring preloading and accomplishes the required control, thus
holding the flow rate constant.
HA 5041
5/2014
Replaces
HA 5041 6/2012
Size 06 · p
max
320 bar · Q
max
32 L/min
2 Way Flow Control Valves
VSS2-206
AB
q
2 way pressure compensated flow control valve
with integral reverse check valve
q
Subplate mounting
q
Flow rate setting:
- with adjustment knob
- with adjustment knob and keylock
q
For use in meter-in, meter-out or bleed-off
applications
q
External pilot closing of pressure compensator
q
Installation dimensions to ISO 4401-03-02-0-94
and DIN 24 340-A6
q
Subplates - see catalogue HA 0002
HA 5041
2 way design
Nominal size
Flow Control Valve
Design
Variant
A with external pilot closing of the
pressure compensator
O without external pilot closing of the
pressure compensator
Adjustment
Z
O
hand knob with keylock
hand knob without keylock
Built-in check valve
VSS2-206- /J -1
Seals
no designation
V
NBR
FPM (Viton)
T
P
Flow control valve VSS2-206-x/JxA-1
(with external pilot closing of pressure compensator)
This model functions on the same principle as the previous one.
However, with this type of valve, the bottom surface area of the
compensator is connected to an external port P via orifice (10),
rather then being internally connected to port A. This arrangement
enables external pilot closing of pressure compensator, which
function can be described using the circuit diagram shown.
When there is no flow through the valve (directional valve (11) in its
middle position), pressure in port P acts at the bottom area of the
compensator via orifice (10) and holds the compensator in its upper
closed position. When the directional valve is shifted to its left
position, the port A is connected to the system pressure, but the
closed compensator avoids abrupt flow increase in port B. Hence,
lunge of the actuator during start-up is prevented. The function of
the compensator is the same, as the function described above.
This model with external pilot closing of the compensator can only
be used in meter-in circuits.
Reverse free-flow from port B to port A, with both types of the flow
control valves, is provided for by a built-in check valve (6).
Ordering Code
11
Max. flow rate in L/min
0,6
0,6Q
1,6
3,2
6,3
16
32
1,6Q
3,2Q
6,3Q
16Q
32Q
HA 5041
Nominal size mm 06
Maximum flow L/min 0,6 1,6 3,2 6,3 16 32
Minimum flow cm
3
/min 10 15 20 25 60 250
Maximum working pressure at port A bar 320
Maximum working pressure at port B bar 320
Pressure drop bar 8.5 ... 14
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range for (NBR) °C -30 ... +100
Fluid temperature range for ( Viton) °C -20 ... +120
Viscosity range (mm
2
/s) 20 ... 400
Maximum degree of fluid contamination
- for Q £ 1 L/min
- for Q > 1 L/min
Class 20/17/14 to ISO 4406
Class 21/18/15 to ISO 4406
Permissible flow rate variation
for Q > 2.5 Q
min
at pressure change 6 to 100%
%± 5
Weight kg 1.1
Mounting position unrestricted
Technical Data
Functional Symbols
Flow control valve: simplified
without external pilot with external pilot
Flow control valve: detailed
without external pilot with external pilot
ABAB
ABAB
P
P
Spare Parts
Seal kit
Type
Dimensions, quantity
Ordering number
Square ring O-ring
Standard NBR 70 9,25 x 1,68 (4 pcs.) - 15608800
Viton V90 - 9,25 x 1,78 (4 pcs.) 20152400
HA 5041
Dp-Q Characteristic Measured at n = 32 mm
2
/s
Throttling area closed
Dependency Flow-Temperature
Flow in cm
3
/min
Temperature °C
Pressure drop Dp [bar]
Flow Q [L/min]
Temperature °C
Flow Q [L/min]
Scale divison on valve
Flow rate A ® B dependent upon scale adjustment setting
Characteristics Measured at n = 32 mm
2
/s
4
12
16
20
24
28
0 1 2 3 4 5 6 7 8 9 10
8
32
0,5
1,5
2,0
2,5
3,0
3,5
1,0
4,0
0 1 2 3 4 5 6 7 8 9 10
1,6Q
3,2Q
6,3Q
32Q
16Q
0,6Q
Check valve
Pressure difference Dp related to flow from B ® A
Flow Q [L/min]
Scale divison on valve
0,30
0,40
0,50
0,60
0,70
0,80
0,20
0,10
HA 5041
Flow rate dependent upon pressure
Model 1,6Q
Flow Q [L/min]
Inlet pressure [bar] Inlet pressure [bar]
Inlet pressure [bar] Inlet pressure [bar]
Inlet pressure [bar]
Model 3,2Q Model 6,3Q
Model 32Q
Model 16Q
Flow Q [L/min]
Flow Q [L/min]
Characteristics Q = f(p) Measured at n = 32 mm
2
/s
Inlet pressure [bar]
Model 0,6Q
Flow Q [L/min]
Flow Q [L/min]
Flow Q [L/min]
HA 5041
Caution!
The packing foil is recyclable.
Mounting bolts M5x30 DIN 912-10.9 (4 pcs.) must be ordered separately.
Tightening torque of the bolts is 8.9 Nm.
The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should
not be construed in any case as a guaranteed representation of the product properties in the sense of the law.
Valve Dimensions Dimensions in millimeters
1 Port A (inlet)
2 Port B (outlet)
3 Port P(hole
Æ5.2 mm solely with type
permitting external closing of the compensator,
otherwise just the counterbore for O-ring)
4 Counterbore for O-ring (position for T port)
5 Name plate
6 Square ring 012 - KANTSEAL (4 pcs.)
(9.25x1.68 NBR70)
7 Flow adjustment knob
8 Height of the valve with hand knob without keylock
9 Height of the valve with hand knob with keylock
10 Distance required to remove the key
Subject to alteration without notice!
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
Tel.: +420-499-403 111
E-mail: info.cz@argo-hytos.com
www.argo-hytos.com
10
9
8
7
6
1432
5
Required surface finish of
interface
