Flow sharing
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C Flow sharing Pre/Post compensated valve M Y CM MY CY CMY K

C M Y CM MY CY CMY K FUNCTIONAL ADVANTAGES OFFERED BY THE EX FAMILY PATENTED SYSTEM All the control valves belonging to the EX family work according to a principle designed by Hydrocontrol’s R&D department and covered by patents EP1860327 (A1) EP1860327 (B1) US2008282691 (A1) and US7581487 (B2). The valve LS signal is managed according to innovative procedures which are an absolute first in the flow sharing world, ensuring: • elimination of any LS signal bleed off, which can be observed in most systems currently available commercially, and is often the cause of poor compensation accuracy,...

POST-COMPENSATED SYSTEMS Nowadays the constant evolution of mobile hydraulics towards energy saving solutions finds the right answer in load-sensing technology. More work performance, ease of use and controllability, improved safety and high energy efficiency are some of the winning features of these systems. The load- induced pressure downstream of an orifice is sensed from the pump and the flow is adjusted to maintain a constant pressure drop across the orifice getting a load independent flow. The orifice is typically a directional control valve with proportional flow characteristics. In...

C M Y CM MY EX PRECOMPENSATED VALVES A special precompensated version has been developed, by applying the technology used for postcompensated EX versions. The characteristics of precompensated valves are well known in the market, given the popularity of this technology. Starting from a common inlet section, it is possible to obtain both the anti-saturation (Flow sharing) EX version and a pre-compensated Load Sensing EX version. Two versions can also be mixed together in the same valve in order to obtain priority circuits. CY CMY K

C M Y CM MY CY CMY K Flow sharing pre and post compensated valve SPECIAL FEATURES LS Relief on Post-compensated section LS Relief on Pre-compensated section Another feature not commonly found in flow sharing systems is the The purpouse to use a Load Sense relief instead of a standard shock possibility to have a Load Sense relief on the single sections. relief is to improve the efficiency loss and save energy in the system. The purpouse to use a Load Sense relief instead of a standard shock When a standard shock relief is used, the full flow across the relief will relief is to improve the...

C M Y CM MY CY CMY K SPECIAL FEATURES Flow control device on the local compensator Flow inhibiting device The local compensator of a section can be equipped with a special The EX family offers a unique patented function to implement machine knob which can be operated to adjust the maximum flow delivered by control logics: in the presence of mechanical and hydraulic controls, the section concerned. too, it is possible to inhibit certain features, by preventing local This device acts by limiting the working stroke of the local compensator compensator opening. and is operated when a single...

C M Y CM MY CY CMY K Flow sharing pre and post compensated valve Parallel connection of several valves Thanks to an interesting construction design, it is possible to obtain parallel connection of several control valves without that the flow sharing function efficiency and simultaneity of movement being affected. The circuit available either for fixed or variable pump, requires P, T and LS signal connection according to the following diagram. This solution is especially successful in the loading crane or forestry crane industries for single pump circuits. High pressure carry over function...

C M Y CM MY CY CMY K STANDARD WORKING CONDITION -20°C / +80°C Operating temperature range 10 ÷ 300 cSt Kinematic viscosity range 9 (NAS 1638) - 20/18/15 (ISO 4406:1999) Max contamination level β10 > 75 (ISO 16889:2008) Recommended filtration level All information and diagrams refer to a mineral base oil VG46 at 50°C temperature (32 cSt kinematic viscosity) GENERAL SPECIFICATION Load Sensing post compensated flow sharing valve: I Open Center with inlet compensator (fixed displacement pump) I Closed Center (variable displacement pump) TYPE EX34 EX38 EX46 EX54 EX72 1 - 10 1 - 10 1 - 10 1 - 10...

OPTION CHART (*) We recommend to keep the T line for the electrohydraulic cartridges separeted from the T line of the valve.

C Flow Sharing valve for 130 l/min inlet flow rate: suitable for mini-excavators up to 5 t, truckmounted cranes up to 10 tm, small and mediumsized agricoltural (harvesting) machinery and work elevator lifting platforms. M Y CM MY CY CMY K

Flow sharing pre and post compensated valve DIMENSIONAL DRAWING

C Flow Sharing valve for 150 l/min inlet flow rate: suitable for applications including truck-mounted cranes up to 25 tm, forestry cranes, tractors and mini-excavators up to 6 t. M Y CM MY CY CMY K

C M Y CM MY CY CMY K Flow sharing pre and post compensated valve challenge by hydrocontrol

C M Y CM MY CY CMY K 46 Flow Sharing valve for 220 l/min inlet flow rate. Common applications for this control valve are telehandlers, midiexcavators, medium and large sized backhoe loaders, forestry cranes and crane trucks. 0 200 160 200 240 0 25 50 75 100 125 150 140 50 120 210 100 80 280 150 40 70

C M Y CM MY CY CMY K Flow sharing pre and post compensated valve STANDARD THREADS EX46 G1 1” 5/16 - 12 UNF SAE 12 G 3/4 1” 1/16 - UNF SAE 12 challenge by hydrocontrol

C M Y CM MY CY CMY K Flow Sharing valve for 300 l/min inlet flow rate. The most common application for this control valve are excavators, wheeled loaders, rough terrain cranes, drilling machines, mobile cranes, mining and off-shore equipment. 300 300 240 180 120 60 50 100 150 200 250

C M Y CM MY CY CMY K Flow sharing pre and post compensated valve STANDARD THREAD EX54 challenge by hydrocontrol UN-UNF (ISO-725) (ISO 11926-1) 1” 5/8 12 UNF SAE 20 1” 5/8 12 UNF SAE 20 1”1/4MA - 1”1/4UNC 1” 5/16 12 UNF SAE 16 3/4” MA - 3/4 UNC

C Flow Sharing valve for 450 l/min inlet flow rate. Suitable applications include drilling machines, wheeled loaders, telescoping cranes, marine cranes, mining and off-shore equipment. M Y CM MY CY CMY K