Features
* Modular assembly system, suitable for ‘Build Program’.
* Maximum operating pressure 400 Bar. ( higher pressure on request)
* Different spool types up to 1000 L/min.
* Compact sandwich design, suitable for mobile applications.
* Pressure compensated for simultaneous multi users.
* Several inlet plate types available for different types of pumps.
* Operating control in any combination (Electric-, Hydraulic-manual override).
* Adjustable ΔP for setting the maximum flow for maximum proportional range.
* Several user options as primairy-, shock relief, suction valve and remote control functions.
* Designed for customization.
Technical Data
Max. flow: Port P or P1 1500 L/min.
Port P + P1 2000 L/min.
Port A / B 1000 L/min.
Max. pressure: Port P / A / B 400 Bar
Port T 35 Bar
Pressure setting range 20-400 Bar
Pressure drop over 2-way compensator (A,B) 0-16 Bar
Internal pilot pressure supply 28 Bar
Pilot pressure for electric and hydraulic control 6-20 Bar
Spool stroke 16 mm
Spool overlap (dead band) 3,5 mm (22% of spool stroke)
Fluid Minaral oil according to
DIN 51524/51525
Fluid temperature range -30°C…+80°C
Viscocity range 10…500cSt, optimal 30cSt
Contamination level max. According to NAS 1638 Class
8 or ISO 4406: 18/16/13
Port connections
Port P 2” SAE flange
Port T 2” SAE flange
Port A/B 1.1/2” SAE flange
Port Ls G1/4” BSP
Port L G3/8” BSP
Port YA,YB G1/4” BSP
Electric connection
AMP Junior Power Timer ( optional Deutch connector)
Nominal voltage 12 VDC or 24 VDC
Nominal current 12 VDC (1350 mA)
24 VDC (675 mA)
Coil resistance 12 VDC (5,3 ± 5% Ω)
24 VDC (21,2 ± 5% Ω)
Recommended dither frequency 100 Hz
Type of protection IP 65
Duty cycle 100%
Hysteresis 3%
Technical information
The unique modularity of the APV enables system solutions for manufacturers of mobile machines,
as a wide range of functions can be integrated/changed by the customer in an easy, flexible and cost-
effective way.
Inlet Plate
Inlet plates are available for fixed and variable displacement pumps, and constant pressure networks.
Functions as:
- anti-saturation;
- pump unloading;
- pressure relief;
- LS signal amplifier and combinations thereof; can be integrated into the inlet plate.
- pilot feeding point for hydraulic joysticks (A0).
Control Valve
The control valve consists of spool section and connection block.
Spool Section
The main advantage of the APV-series is the standardization of the spool section. Different types of
spools and control methods are available. Up to 6 control valves, with or without a 2-way
compensator can be stacked. For perfect system stability the 2-way compensator can be equipped
with a damping function. Check valve function is also available within this compensator. Stroke
limitation per port and Δp-setting per section is standard.
Connection Block
A very wide range of optional functions can be delivered using several, easy to mount, low cost,
connection blocks. Besides a basic connection block, optimized customization can be achieved by the
following functions:
- remote controlled pressure setting/unloading per port;
- adjustable secondary pressure setting per port;
- suction valves and shock/suction valves per port;
- adjustable primary port relief per port with excellent relieving characteristic.
Any other special functions can be easily integrated into special connection blocks on request.
End Plate
Also the end plates for different control methods can be equipped with optional functions as:
- additional P- and T port;
- Z-port to enable a LS-cascade with another valve;
Safety
To comply with national and international safety regulations, special safety functions can be
integrated as described above.
Serviceability
The modular concept improved the servicing of the APV.
All orifices and shuttle valves are directly attainable from the outside of the valves.
Symbols and Terminology
Graphic symbols in accordance with ISO1219-1.
Identification of valve ports in accordance with ISO 9461.
For the purposes of this document, the definitions and terminology given in ISO 5598 and the
following definitions apply:
- LS: load sensing
- Primary relief: relief function in the flow line, e.g. the 3-way compensator in the
inlet plate and the shock/suction valve in the connection block.
- Secondary relief: relief function in the signal line, e.g. max. load pressure relief in the
inlet plate.
Pos. Description:
1 Inlet plate, several types available for different types of pumps
1A Adjustable load pressure relief, standard on all types of inlet plate
1B Pump relief function
1C Pressure reducing valve, for electrical control
1D LS amplifier, for strong signal and perfect stability of the LS-pump
1E Electrical proportional pressure relief
2 Spool section, basic section for different main spool types
2A 2-way compensator for load-independent control and simultaneously operation
2B Flow adjustment by regulating the pressure drop across the main spool
2C Control method: Electrical proportional
2D Control method: Hydraulic Proportional
2E Additional manual override control
2F Main spool type
2G Adjustable stroke limitation for adjusting the max. flow per port
3 Connection block, separate block for all different types of options
3A Remote control connection on port A and B
3B Adjustable pressure setting on port A and B
3C Shock/Suction valves port A and B (optional)
4 End plate, complete with P1, T1 and Z
4A Without P1 and T1
Instruction for pressure and flow setting:
Pos.1: Main LS-relief valve
Function description:
The setting of the LS-relief valve pos.1 defines the main pressure setting of the valve block.
Setting:
Pull of the rubber screw protector.
Loosen the nut of the setting screw pos.1 and set the maximum LS-pressure.
Turning the screw clockwise increases the pressure.
Turning the screw anticlockwise decreases the pressure.
One full turn increases the pressure with about 100 bar.
Pos. 2: Delta-p setting screw
Function description:
The delta-p setting screw of the integrated 2-way compensator enables to set the flow to the user
ports by changing the delta pressure across the main spool.
The flow can be increased by increasing the delta pressure.
Setting:
Loosen the nut of the setting screw pos.2 and set the delta-pressure of the 2-way compensator.
Turning the screw clockwise increases the delta-pressure.
Turning the screw anticlockwise decreases the delta-pressure.
Pos. 3: Stroke limitation screw port B
Function description:
The stroke limitation screw of the main spool enables to set the flow to the user port B. The flow can
be decreased by decreasing the stroke of the main spool.
Setting:
Loosen the nut of the setting screw pos.3 and set the flow across the main spool.
Turning the screw clockwise decreases (limits) the flow.
Turning the screw anticlockwise increases the flow.
Pos. 4: LS-amplifier setting
Function description:
The LS-amplifier creates a much stronger signal than the actual LS-signal of the valve (concerning the
amount of oil).
The reason is that the mounted LS-amplifier regulator creates a copy of the actual LS-signal of the
valve (due to feeding by orifices) which is created directly from the p-line.
The use of the LS-amplifier enables to compensate losses of long LS-tubes between the valve and the
LS-pump, eventually at cold temperatures.
Also eventually occurring losses in the regulator of the LS-pump (LS>T connection for unloading) can
be compensated.
Setting:
The LS-amplifier pre-set at factory set and is normally not necessary to change.
Note:
Connect the LS-pump to the LS-connection of the LS-amplifier block itself and not the standard LS-
connection of the inlet section (plugged).
Pos.5: LS-relief valve port B
Function description:
The setting of the LS-relief valve pos.5 defines the main pressure setting of the valve block.
Setting:
Pull of the rubber screw protector.
Loosen the nut of the setting screw and set the maximum LS-pressure.
Turning the screw clockwise increases the pressure
Turning the screw anticlockwise decreases the pressure.
One full turn increases the pressure with about 100 bar.
Pos.6: LS-relief valve port A
Function description:
The setting of the LS-relief valve pos.6 defines the main pressure setting of the valve block.
Setting:
Pull of the rubber screw protector.
Loosen the nut of the setting screw and set the maximum LS-pressure.
Turning the screw clockwise increases the pressure
Turning the screw anticlockwise decreases the pressure.
One full turn increases the pressure with about 100 bar.
Pos. 7: Setting of the counterbalance valve port B
Function description:
The counterbalance valve represents the load holding function.
Setting:
The counterbalance valve should be set at about 1.3 times the maximum load induced pressure.
The counterbalance valve is set to 200 bar, turning the setting screw clockwise decreases the
pressure setting.
Pos. 8: Setting of the counterbalance valve port A
Function description:
The counterbalance valve represents the load holding function.
Setting:
The counterbalance valve should be set at about 1.3 times the maximum load induced pressure.
The counterbalance valve is set to 200 bar, turning the setting screw clockwise decreases the
pressure setting.
Pos. 9: Stroke limitation screw port A
Function description:
The stroke limitation screw of the main spool enables to set the flow to the user port A. The flow can
be decreased by decreasing the stroke of the main spool.
Setting:
Loosen the nut of the setting screw pos.9 and set the flow across the main spool.
Turning the screw clockwise decreases (limits) the flow.
Turning the screw anticlockwise increases the flow.
