Slide 1: VA300 Training
VA300 Training Next Generation Load Sensing Valves
Slide 2: VA300 Valve Layout
VA300 Valve Layout Proportional, Load sensing, Pre-compensated End section Work section 4 • 1-11 work sections* Work section 3 • Combinable with VA Series valves Work section 2 VA450 & VA130 Work section 1 Inlet section • Each work section individually configurable • Custom manifold integration poss
Slide 3: VA300 Technical Data
VA300 Technical Data Pressure, Flow & Dimensions Max pressure, unlimited number of cycles: • Pump: 370 bar* • Work Port: 370 bar* • Tank: 20 bar Flow capacity: • Compensated flow to work port: 300 l/min • Uncompensated flow to work port: 350 l/min Dimensions: Section width • Inlet section LS300: 83,
Slide 4: VA300 Inlet section
VA300 Inlet section LS300 Pilot drain port, TP Pressure relief Pilot reducer valve valve, Tank Pressure relief valve, Pump Copy spool for Pilot supply Tank port, T1 load signal Load signal orifice check valve check valve Pump port, P1 Pilot supply port for external use, PF Pilot supply port, PS Load
Slide 5: Inlet section Functionality: pump and tank ports
VA300 Inlet section Functionality • Pump and tank ports • Connection ports: T1 • P1 – Pump port. T2 / Counter • PX – Pump pressure gauge port. pressure valve • T1 – Tank port. P1 • T2 – Tank port. Can be fitted with a counter pressure valve. • TX – Tank pressure gauge port. PX • Counter pressure val
Slide 6: Inlet section Functionality: pressure limitation
VA300 Inlet section Functionality • Pressure limitation Pressure relief valve, tank • Main pressure relief valve in pump gallery – Protects pump and valve from pressure peaks in the system. Pressure relief valve, pump • Pressure relief valve in tank gallery – Limits the pressure before the counter p
Slide 7: Inlet Section Functionality: load signal system
VA300 Inlet Section Functionality • Load signal system • Load signal copy function – Copies the highest load signal using pump oil and sends it to port LS. Avoids oil consumption from Internal load signal check valve workport. Internal load signal copy function • Load signal orifice check valve – Re
Slide 8: Inlet Section Functionality: pilot pressure system
VA300 Inlet Section Functionality • Pilot pressure system • Pilot pressure supply function – Reduces pump pressure to a set Internal check valve level to ensure that there is enough pressure to supply the spool Internal pressure reducing actuators. The reduced pressure can either be internally conne
Slide 9: Inlet Section Functionality: pilot drain function
VA300 Inlet Section Functionality • Pilot drain function – The pilot return can either be internally connected directly to the main tank or via a check valve to raise the pressure in pilot tank, or externally TP drained. PF • Connection ports: PS • PF – Port for external use of the reduced pilot pre
Slide 10: Work section WS300
VA300 Work section WS300 Pilot valve Mechanical feed activating P-B, A-T Pressure relief reducer P-B Pressure relief valve workport A valve workport B Pilot valve activating P-A, B-T Mechanical feed reducer P-A Workport A Workport B Main spool Spool actuator A-side Gauge port for pilot pressure acti
Slide 11: Work section Functionality: spool actuators
VA300 Work section Functionality • Spool actuator A-side EC ECWP PC • EC – Electric proportional spool actuator controlled by two pilot valves. Supplied internally with pilot pressure oil. • ECWP – Same as EC but with possibility to measure workport pressure in cap. • PC – Hydraulic, proportional sp
Slide 12: Work section Functionality: spool actuator related functions
VA300 Work section Functionality • Spool actuator related functions • Spool stroke limiters – Mechanically limit the spool stroke in either direction, adding flexibility in maximum flow to Spool stroke limiter workport. Spool stroke limiter • Pilot signal damping – Dampens the pilot signal to provid
Slide 13: Work section Functionality: spool related functions
VA300 Work section Functionality • Spool related functions • Main spool – Function adapted main spools with pressure compensated flow rate up to 300 l/min. Main spool • Pressure compensator – Maintains constant speed of function regardless of the load and pressure variations in the system. • Integra
Slide 14: Work section Functionality: workport related functions
VA300 Work section Functionality Pressure relief Pressure relief valve workport A • Workport related functions Mechanical feed valve workport B reducer P-B • Mechanical feed reducers – Set maximum pressure in Mechanical feed workport individually by limiting the load signal with low reducer P-A ener
Slide 15: End section US300
VA300 End section US300 Float function workport B Float function workport A Oil circulation port, OC Tank port, T3 Oil circulation function Pump port, P2 Load signal connection, LSP 15
Slide 16: End section Functionality
VA300 End section Functionality Float function workport B Float function workport A • End section functions • Float function – Opens a connection between workports and tank to e.g., allow an implement to freely float on rough terrain. • Oil circulation – Opens a connection from pump to either the ta
Slide 17: Manifold integration: Customization
VA300 Manifold integration Customization • Customer unique manifolds • Designed completely in accordance with the customer’s specific needs regarding functionality, such as feed- and control functions for brake-, steering, suspension, cooling controls etc. • Consists of high-quality components from
Slide 18: Online configurator eSyber
VA300 Online configurator eSyber • Online configurator with all information for the unique valve available in one place: • Code report • Hydraulic schematics • Spare parts list • 3D-model • 2D-drawing • Learn More files for each function 18