1
q
Cartridge design
q
Flow rate setting with adjustment screw
q
For use in meter-in, meter-out
and bleed-off applications
Pressure compensated flow control valves VSS3-062
are employed in hydraulic systems where only small
speed or revolution variation due to load changing are
required.
The valve consists basically of throttling orifice (1),
pressure compensator (2), bushing (3), adjustment
screw (4) and spring (5).
Throttling in direction A ® B takes place on the throttling
orifice. The flow rate depends on the orifice diameter
and on the pressure difference at the orifice. The
pressure difference can be adjusted in a certain range
through preloading the spring (5), which results in the
respective flow change. The allocation of the orifice
diameters and the corresponding flow rates is apparent
from the respective characteristics. The flow rate
adjustment can be accomplished by adjustment screw
(4). The clockwise rotation increases the flow rate, the
anticlockwise rotation decreases the flow rate.
The flow rate stabilization is provided for by pressure
compensator (2), which is situated behind the throttling
orifice and mounted into bushing (3). The pressure
compensator continuously compares the pressure
difference at the throttling orifice (1) with the value given
by the spring parameters and the spring preloading and
accomplishes the necessary control actions, thus
holding the flow rate constant.
The valve cannot be closed. As mentioned above, only
small flow rate adjustments can be realized.
In flow direction B ® A, the valve works as an ordinary
throttle valve. The pressure losses depend on the orifice
diameter – see the respective characteristics.
The valve housing (7), the nut (6) and the adjustment
screw (4) are zinc coated.
HA 5057
5/2006
Replaces
HA 5057 1/2000
Size 06 · p
max
up to 320 bar · Q
max
up to 45 L/min
2-way cartridge flow control
valves
VSS3-062
Functional Description
AA
B
2
HA 5057
Ordering Code
VSS3-062/S-
Nominal size
2-way design
Flow control valves
Cartridge
Seals
without designation
V
Standard (NBR)
Viton (FPM)
Nominal flow rates
1.6
4
6.3
10
16
20
1.6 L/min
4.0 L/min
6.3 L/min
10 L/min)
16 L/min)
20 L/min)
Nominal size mm 06
Nominal flow rates L/min 1,6 4 6,3 10 16 20
Flow range see Q-Dp characteristic
Maximum working pressure bar 320
Pressure difference bar see Q-Dp characteristic
Pressure drop B - A bar see Q-Dp characteristic
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range (NBR) °C -30 ... +80
Fluid temperature range (Viton) °C -20 ... +80
Viscosity range mm
2
/s 20 ... 400
Maximum degree of fluid contamination Class 21/18/15 to ISO 4406 (1999)
Weight kg 0.192
Mounting position optional
Dp-Q Characteristic Measured at n = 35 mm
2
/s and t =40 °C
Flow directional B ® A (Throttling without stabilization)
Pressure drop Dpinbar
Flow Q in L/min
Technical Data
Æ2.5
Æ3
Æ(3.5
3
HA 5057
Dp-Q Characteristics Measured at n = 135 mm
2
/s and t = 40 °C
Flow directional A ® B (Controlled flow)
Nominal flow rate 1.6 L/min Nominal flow rate 4 L/min
Nominal flow rate 6.3 L/min Nominal flow rate 10 L/min
Nominal flow rate 16 L/min
Nominal flow rate 20 L/min
Recommended flow
range
Recommended flow
range
Recommended flow
range
Recommended flow
range
Recommended flow
range
Recommended flow
range
Flow Q in L/minFlow Q in L/min
Flow Q in L/min
Flow Q in L/min
Flow Q in L/min
Flow Q in L/min
Pressure difference Dp bar Pressure difference Dp bar
Pressure difference Dp bar Pressure difference Dp bar
Pressure difference Dp bar Pressure difference Dp bar
19
4
HA 5057
Valve Dimensions Dimensions in inches and millimeters (in brackets)
Caution!
The packing foil is recyclable.
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.
1 Type designation (stamped)
2 Screw for fine flow adjustment
- inside hexagon 6 mm
- anticlockwise rotation = flow decrease
- clockwise rotation = flow increase
3 Wrench flats size 24 mm,
tightening torque 60 Nm
4 Sealing: O-ring 19.4 x 2.1
supplied with valve
5 Combined sealing: O-ring 14x1.78
Back-up ring BBP80B015-N9
14.73 x 17.43 x 1.14
Seal kit
Type
Dimensions, quantity
Ordering number
O-ring Back-up ring
Standard - NBR
19.4 x 2.1 NBR80 (1 pc.) 17.4 x 1.3 (1pc.)
520-029917.17 x 1.78 NBR90 (1pc.) 14.73 x 17.43 x 1.14 (1 pc.)
14 x 1.78 NBR90 (1pc.) -
Viton
19.4 x 2.1 (1 pc.) 17.4 x 1.3 (1pc.)
520-029817.17 x 1.78 (1pc.) 14.73 x 17.43 x 1.14 (1 pc.)
14 x 1.78 (1pc.) -
2
3
1
4
5
Spare Parts
Subject to alteration without notice!
ARGO-HYTOS a. s. CZ - 543 15 Vrchlabí
Tel.: +420-499-403111, Fax: +420-499-403421
E-mail: sales.cz@argo-hytos.com
www.argo-hytos.com
