Parker-hannifin Corporation · NYSE:PH
Parker-hannifin — Technical Presentation (January 2024)
29 slides from Parker-hannifin's technical presentation, Jan 10, 2024
Slide 1: L90LS Training
L90LS Training L90LS Load Sensing Valve January 10, 2024
Slide 2: L90LS Valve Layout
L90LS Valve Layout Proportional, Load sensing, Pre-compensated • 1-12 work sections • Combinable with K220LS • Pre-compensated with flow sharing capabilities • Each work section individually End section configurable Work section 4 Work section 3 • Custom manifold integration possible Work section 2
Slide 3: L90LS Technical Data
L90LS Technical Data Max pressure, unlimited number of cycles: • Pump: 330 bar • Workport: 350 bar • Tank: 20 bar Flow capacity: • Compensated flow to workport: 130 l/min • Uncompensated flow to workport: 160 l/min Dimensions Section width • Inlet section LS1, LS2, CFC: 55 mm • Inlet section IP: 30
Slide 4: L90LS Applications
L90LS Applications Target applications • Forestry – Harvesters, forwarders, harvesting heads, forest cranes • Material handling – Cranes, forklifts, reach stackers • Construction – Multi-purpose machines, high-end backhoes, wheel loaders • Mining – Drill rigs, loaders • Municipal – Salt spreaders, s
Slide 5: Inlet section CFC / LS1
L90LS Inlet section CFC / LS1 • CFC – Inlet section with an adjustable Pressure relief valve, bypass spool pressure relief valve for systems with a fixed pump and where all work sections Tank port, T1 Pump port, P1 have LS compensators. Can only be Pressure relief valve, pilot stage used in the firs
Slide 6: Inlet section LS2
L90LS Inlet section LS2 • Inlet section with fixed, direct acting Pressure relief valve, Pump pressure relief valve for systems with a variable pump and where all work Tank port, T1 Pump port, P1 sections have LS compensators. Can be used in both the first and subsequent valves in a multi-valve syst
Slide 7: Inlet section AS
L90LS Inlet section AS • Inlet section with flow sharing function, meaning that at pump saturation, the flow is evenly distributed between activated work sections with AS Differential pressure relief valve, PLS compensators. For systems with a variable pump and can only be used in Tank port, T1 Pump
Slide 8: Inlet section AS2
L90LS Inlet section AS2 • Inlet section with flow sharing function, meaning that at pump saturation, the Tank port, T1 flow is evenly distributed between Pump port, P1 activated work sections with AS compensators. For systems with a variable pump and can only be used in the subsequent valves in a mu
Slide 9: Inlet section IP
L90LS Inlet section IP • Simplified inlet section with only connections for pump, tank and load signal. For systems with a variable Tank port, T1 pump and where all work sections have LS compensators. For systems with a variable pump and can only be used in the first valve in a multi-valve system. P
Slide 10: Inlet section: Pressure limitation
L90LS Inlet section Pressure limitation PA1 • PA1 – Direct acting pressure relief valve • For inlet type LS2. • Protects the pump and valve from pressure peaks in the system. • PS – Adjustable pilot operated pressure relief PS valve • For inlet CFC as a bypass function where max pressure is indirect
Slide 11: Inlet section: Pressure limitation
L90LS Inlet section Pressure limitation • PLM – Adjustable pressure relief valve on the load signal • For flow sharing inlets AS/AS2. PLS • Limits the load signal to pump which together with the pump regulator setting corresponds to the maximum pressure in pump gallery. PLM • PLS – Differential pres
Slide 12: Inlet section: Load signal system
L90LS Inlet section 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 workport. • Connection ports: • LS – Copied load signal. Primary port for connecting the load signal to LS the pump regulator. Oil s
Slide 13: Pump pressure blocking and LS unloading function
L90LS Inlet section Pump pressure blocking and LS unloading function • Safety function allowing OEMs to equip their Electrically controlled machines with an emergency stop function to comply emergency stop with the EC Machinery Directive. The function can be controlled either electrically or hydraul
Slide 14: Work section
L90LS Work section OOO, OOT, TCO, TCT, TOO, TOT, TTO, TTT Pilot valve Pilot valve activating P-A, B-T activating P-B, A-T Pressure relief Pressure relief valve workport A valve workport B Feed reducer Workport A Workport B Spool actuator Gauge port for pilot Gauge port for pilot pressure activating
Slide 15: Work section: Spool actuator
L90LS Work section Spool actuator • Spool actuator – closed • ECS2 – Electric proportional spool actuator controlled by two pilot valves. Supplied internally with pilot pressure oil. • ECS4 – Same as ECS2 but with possibility to add a spool position sensor ECS2, EC2 • EC2 – Same as ECS2 but with man
Slide 16: Work section: Spool actuator
L90LS Work section Spool actuator • ECH4 – Same as ECH3 but with the possibility to add a spool position sensor. • PC – Hydraulic, proportional spool actuator controlled by external pilot pressure. ECH4 • PC4 – Same as PC but with the possibility to add a spool position sensor. PC • PCH2 – Same as P
Slide 17: Work section: Spool actuator, open B-side
L90LS Work section Spool actuator • Spool actuator – Open B-side • ACP – Proportional pneumatic spool actuator. • B3 – Spring centered spool actuator with 3-position mechanical detent. ACP • C – Spring centered spool actuator with manual operation by means of a lever. B3 C 17
Slide 18: Work section: Spool actuator, open A-side
L90LS Work section Spool actuator • Spool actuator – Open A-side • LM – Lever attachment. • LU – Spool end cover. LM • A053 – As LM but rotated 180° LU A053 18
Slide 19: Spool actuator related functions
L90LS Work section Spool actuator related functions • Spool stroke limiters – Mechanically limit the spool stroke in Spool stroke limiter either direction, adding flexibility in maximum flow to Spool stroke limiter workport. • Spool position sensor – Diagnostics of the spool’s position. • For spool
Slide 20: Spool related functions
L90LS Work section Spool related functions • Main spool – Function adapted spools with pressure compensated flow rate up to 130 l/min. Main spool • Pressure compensator – Maintains constant speed of function regardless of the load and pressure variations in the system. • Integrated check valve to pr
Slide 21: Workport related functions
L90LS Work section Workport related functions • Feed reducer – Set maximum pressure in workport Feed reducer Pressure relief Pressure relief valve workport B individually by limiting the load signal with low energy valve workport A loss, consumes ~2 l/min. • Pressure relief valve in workports – Prot
Slide 22: End section US
L90LS End section US Counter pressure valve tank connection, T2 Tank port, T3 Pilot drain port, TP Pilot supply port, PS Pilot pressure port for external use, YS Pilot reducer valve Load signal connection, LSP Pump port, P2 22
Slide 23: End section: MU combined work and end section
L90LS End section MU* - Combined work- & end section 23
Slide 24: End section functions
L90LS End section End section functions • Counter pressure valve – Increases the pressure in the valve's tank Counterpressure valve gallery to ensure the availability of oil to refill over the relief valves Pilot tank port in the workports. This results in improved anti-cavitation characteristics. I
Slide 25: End section functions
L90LS End section End section functions • 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 drained. TP • Connection ports: • YS – Port for external use of the reduced pressure.
Slide 26: Manifold integration: Work section machining
L90LS Manifold integration Work section machining • The work sections are available with extra machining allowing Internal connection smart integration of function manifolds. of workports • System signal lines with various code pins to connect desired load signal to desired signal line. • Internal c
Slide 27: Manifold integration: Function manifolds
L90LS Manifold integration Function manifolds • M10 – The previous section’s workports are connected via internal connection to the M12 manifold allowing the workports to be drained to tank providing float function. The float function can be selected for both or individually for workport A and B. •
Slide 28: Manifold integration: Function manifolds
L90LS Manifold integration Function manifolds • M15 – Mid inlet for separate pump supply of following sections. Includes a main pressure relief valve as protection for following sections. • M17 – Function manifold for draining workports in nearby sections. Max drain flow per workport is 10 l/min. 28
Slide 29: Online configurator eSyber
L90LS Online configurator eSyber Configuration documentation • 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 29
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