1
HA 5236
7/2008
M27 x 2 • p
max
350 bar • Q 60 L/min
2 Way Flow Control Valves
with Free Flow Check Valves
SF2C2A-K2/l
q
Volumetric flow control independent to the load
q
Volumetric flow control independent to the viscosity
q
Large flow range
1
2
Functional Description
The valve consists of an adjustable measuring orifice
plate after which it is installed a stabilizer of pressure
drop and of an by-pass unidirectional valve formed
by a bushing of the stabilizer gate valve fitted with a seat
on the front surface.
During the flow from (1) to (2) the liquid flows through
the centre of the stabilizer gate valve and applies
pressure at the same time to the gate valve
of the unidirectional valve to press it in the seat and then
continues to flow through the throttling cross section to
the side channel (2). The stabilizer has been designed to
serve for maintaining a pressure difference arisen in front
of the measuring orifice plate and after the measuring
orifice plate at a constant level of approximately of 1.2
MPa given by the spring force so as to ensure a constant
rate of flow through the channel (2). The pressure in front
of the throttling orifice plate acts to the side part
of the stabilizer gate valve and the pressure in
the channel (2) acts to back side of the stabilizer gate
valve. Due to permanent equalizing the forces
the position of the stabilizer gate valve changes with
each change of pressure before and after the measuring
orifice plate and in this way it results in appropriate
decreasing or eventually appropriate increasing the flow
cross section in the channel (2).
In the direction from (2) to (1) the liquid flows through
the unidirectional valve with a small pressure drop.
As for appropriate basic surface finish the external parts
are zinc coated.
Replaces
HA 5236 9/2006
2
HA 5236
0 1000 2000 3000 4000 5000
100
80
60
40
20
0 70 140 210 280 350
25
20
15
10
5
0
Pressure p bar[]
Flow Q L/min[]
Flow Q US GPM[]
Pressure p PSI[]
Ordering Code
SF2C2A-K2/l
2 way flow control valve
with free flow check valve
Technical Data
Cavity M27 x 2
Adjustment range L/min 4 - 60
Max. pressure bar 350
Hydraulic fluid Hydraulic oil (HM, HV) according to DIN 51524
Fluid temperature range °C -20 ... +90
Viscosity mm
2
/s 20 ...400
Maximum degree of fluid contamination According to ISO 4406, Class 21/18/15
Weight kg 0.29
Maximum valve tightening torque
in valve body or in control block
Nm 75
+2
Mounting position Unrestricted
p-Q Characteristics Measured at n = 40 mm
2
/s
Adjustable flow range
4 - 40 L/min
4
6 - 60 L/min 6
Seals
no designation NBR
3
HA 5236
46.50 MIN REAM
6HR4
6HR17
6HR32
M27 x 2-6g
2
1
Cavity Measurements in millimeters
Dimensions Measurements in millimeters
HEX 4.0
HEX 17.0
HEX 32.0
M27 x 2.0 - 6g
4
HA 5236
ISO A
2x OTVOR 11,0
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.
Valve Bodies Measurements in millimeters
Seal kits on request.
Spare Parts
The use of aluminium bodies is limited to a maximum operating pressure of 210 bar.
2x HOLES Æ11.0 THRO¢
Body without valve
Material Ports Port size Type code
Aluminium
1, 2 G1/2 SB-K2-0105AL
1, 2 SAE 10, 7/8-14 SB-K2-0106AL
Steel
1, 2 G1/2 SB-K2-0105ST
1, 2 SAE 10, 7/8-14 SB-K2-0106ST
Subject to alteration without notice!
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
Tel.: +420-499-403111, Fax: +420-499-403421
E-mail: sales.cz@argo-hytos.com
www.argo-hytos.com
