SR1A-B2/HxLx-CE1017_Instruction manual for the use of_Gebrauchsanweisung_Návod k použití_31832500_5en_de_cz_07/2021
Page 5
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The valve consists of housing (1), a cone (poppet) with a damping piston (2) and a spring (3). The pressure is set manually via the screw (4). The
spring presses the cone (poppet) into the seat (5) keeping the valve closed. If the system pressure in P channel rises above the value set by spring
compression, the cone (poppet) slides out of the seat and transfers fluid from P channel, to T channel, connected to the tank, until the pressure drops
again. Due to the relatively high pressure loss of the valve, we do not recommend using the valve for continuous pressure regulation. It leads to
energy loss and overheating of the working fluid.
3. Product description
Valve body, seat, spring holder, adjusting screw, locking nut – low carbon steel
Cone (poppet) – direct hardened steel
Sealing – NBR, FPM, PU
Cover – PE
Compression spring– patented steel wire for the production of springs
The materials used are not listed in the lists of prohibited and mandatory documented substances of
Directive 2011/65/EU (RoHS) and EU regulation no. 1907/2006 (REACH).
3.1 Material used:
Body, seat, adjusting screw and locking nut: galvanized surface with corrosion protection 1000 h in NSS according to ISO 9227
The surface protection does not contain hexavalent chromium Cr+6.
3.2 Surface protection against corrosion:
3.3 Basic technical parameters
Parameter
Unit
Value
Maximum pressure in inlet channel P
bar (PSI)
420 (6100)
Maximum pressure in outlet channel T
bar (PSI)
250 (3600)
Maximum volume flow through the valve
l/min (GPM)
60 (16)
Maximum internal volume loss of the closed valve when reducing
inlet pressure to 80% of the set opening pressure
cm
3
/min
0.1
Working fluid temperature range for NBR, PU sealing material
°C (°F)
-30 ... + 100 (-22...212)
Working fluid temperature range for FPM sealing material
°C (°F)
- 20 ... +120 (-4 ... 248)
Range of kinematic viscosity of the working fluid
mm
2
s
-1
10 ... 500
Required minimum purity of working fluid
class
21/18/15 ISO 4406
Lifespan
cycles
10
7
Weight
kg (lbs)
0.27 (0.60)
The valve is designed for common hydraulic working fluids:
› mineral oils of performance classes HM and HV according to ISO 6734-4
› non-flammable and highly flammable hydraulic fluids according to ISO 12922
› environmentally acceptable hydraulic fluids according to ISO 15380
3.4 Working fluid
according to the information from the seal manufacturer, Polyurethane AU is not suitable for working fluids based on glycols and esters.
In case of uncertainty, we recommend performing a test of mutual tolerance on both the sealing material and the working fluid.
ATTENTION:
3.5 Valve characteristics
Characteristics
measured at
ν
= 32 mm
2
/s (156 SUS)
Relief pressure related to flow rate
Pr
essur
e p [bar (PSI)]
Flow Q [l/min (GPM)]
Pressure range
8
42
7
35
6
25
5
16
4
10
3
6
2
2
1
Min. pressure setting
( )
2611
( )
3481
( )
870
( )
6092
( )
6962
( )
4351
( )
5221
1 0
2
1 0
8
60
3 0
6
480
2 0
4
300
( . )
2 6
( . )
5 3
( .0)
8
(
. )
10 6
(
. )
13 2 (
.9)
15
10
20
30
40
50
60
0
420
( )
1740
8
6
7
5
3
4
2
1
