SR1A-B2/HxLx-CE1017_Instruction manual for the use of_Gebrauchsanweisung_Návod k použití_31832500_5en_de_cz_07/2021
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Before commissioning the hydraulic circuit, check that the valve is properly tightened in the chamber. If the valve was set by the manufacturer, only
check the integrity of the seal.
Setting the valve cracking pressure
If the valve is set by the user after installation into the hydraulic circuit, the procedure is as follows:
6.3 Commissioning
After removing the plastic cover using a size 17 wrench, loosen the M10x1 locking nut by turning it counter clockwise. Using a size 5
Allen key, turn the adjusting screw (position 4) to set the required valve cracking pressure at the given volume flow. Turning the
adjusting screw clockwise increases the cracking pressure value. Either a manometer or a pressure sensor must be connected to the
circuit (at least temporarily) to check the set pressure. Check the correct setting of the cracking pressure several time. Reduce the
system pressure below the set cracking pressure. Slowly increase the pressure value and read the value when the valve opens and the
system pressure drops. After adjusting the pressure, secure the position of the adjusting screw with the Allen key and tighten the
locking nut by turning it clockwise using a size 17 wrench. Check the setting again to ensure that it has not changed while tightening
the nut. Feed the sealing wire through the hole in the adjusting screw and the plastic cover and fit the cover. Use sealing pliers to
secure the position of the seal. This protects the valve setting against unintentional change.
Normal operation of the system does not require any valve manipulation.
The valve automatically limits the maximum value the pressure in the circuit and protects it against pressure overload.
6.4 Normal operation
DO NOT EXCEED THE MAXIMUM PARAMETERS
, listed in table 3.3.
OBSERVE OPERATING RESTRICTIONS AND AVOID RISKS
, referred to in paragraph 2.
USE PROTECTIVE EQUIPMENT
When working with hydraulic fluid, we recommend using safety goggles, protective rubber gloves and safety shoes with non-slip soles.
In the event of a system power failure the valve remains set.
Based on the results of the risk analysis, two potential defects were identified:
› External leakage of the valve due to seal damage associated with leakage of working fluid
› Loss of valve function usually manifested as a drop in system pressure.
6.5 Extraordinary and emergency situations
CAUTION
Switching off the pressure source and relieving the circuit
In the event of an emergency, switch the power source off (pump) and relieve all parts of the hydraulic circuit,
including the hydraulic accumulators, by connecting them to the tank. Before any work on the circuit, such as
removing a valve ensure that the circuit is depressurized. Otherwise there is a risk of leakage of the working
fluid and contamination of personnel.
Defective valves must be replaced / repaired. Before disassembly, clean and degrease the hexagon size 27 on the valve body.
This will prevent the wrench from slipping when loosening the valve and avoid possible injury.
The valve is released with a size 27 wrench by turning it counter clockwise.
17
5
+p
p
Locking nut
secured
Adjuster
screw (4)
