POLARIS [PLD 03 T A]
24Pages

GEAR FLOW DIVIDERS CASAPPA S.p.A. Via Balestrieri, 1 43044 Cavalli di Collecchio - Parma (Italy) Tel. +39 0521 304111 Fax +39 0521 804600 E-mail: info@casappa.com www.casappa.com

Modification from former edition.

Modern machinery with increasingly complex circuits often needs combinations of separate and independent movements. POLARIS 10 and POLARIS 20 flow dividers provide technically advanced, low cost power transmission and solve application problems wherever hydraulic flow has divided. In line with our policy of simplifying the design of hydraulic circuits, our flow dividers have relief valves built into limit pressure and prevent cavitation. These components permit hydraulic circuits to be cleverly optimised and reduce installation costs. The POLARIS flow dividers are two or more section...

Relief valves allow the actuators to realign at the end of each cycle in both flow directions. As an example when the cylinders extend, they may not all reach their end stops exactly at the same time. In this case as soon as one cylinder reaches its stop, the relief valve in that section directs fluid to tank until all the other cylinders reach their stops. While retroacting the relief valve acts as check valve and opens to prevent cavitation. Relief settings valve and their identification code are listed in the table below. Stamp code

'A CASAPPA FLUID POWER DESIGN (1): Pressure intensifiers can work at high pressure betweem sections. For working conditions outside the recommended limits shown in the table, please consult our sales department Max. flow for inlet section

Flow accuracy equalizers is within ± 2 % if they are rotating in the recommended speed range and the differential pressure between sections is less than 1450 psi (100 bar). When several single acting cylinders are operated together, acting on loads have not sufficient mass to win the circuit’s resistance, we recommend a further gear section acting as a motor in order to guarantee the cylinders retract. The displacement of this motor should be roughly equal to the sum of the displacements of the other sections. Two typical circuit diagrams of applications where flow equalizers are utilized...

'A CASAPPA FLUID POWER DESIGN DISPLACEMENT SELECTION GUIDEa at 9 Performance range Optimum performance range Each curve has been obtained at 122°F (50°C), using oil with viscosity 212 SSU (36 mm2/s) at 104°F (40°C).

Flow dividers are used where the same pump must drive several different actuators requiring different pressures and flow rates. The displacement of each section must be proportional to the flow rate required by the actuator to which it is connected. Two typical circuit diagrams of applications where flow dividers are utilized will be found on page 11. DISPLACEMENT SELECTION GUIDE EXAMPLE Assume two actuators must be driven using 13.2 US gpm (50 l/min) and 5.3 US gpm (20 l/min) respectively. To find the displacement of the flow divider sections, simply locate the flow rates in question on...

DISPLACEMENT SELECTION GUIDE Performance range Optimum performance range Each curve has been obtained at 122°F, using oil with viscosity 212 SSU at 104°F. D024-004 ID02

Diagram with a flow equalizer operating double acting cylinders. Diagram with a flow equalizer operating single acting cylinders.

Diagram with a flow divider permitting the use of a single pump to drive a number of different actuators requiring flows at different pressures.

Flow divider sections are arranged in descending displacements or groups with the largest displacement to the left as viewed from the outlet ports side. Standard formats of flow dividers are given beneath; for different configurations please consult our sales department. COMPOSITION WITH ADDITIONAL INLET SECTION CS Left inlet section kit CI Intermediate inlet section kit CD Additional right inlet section kit (only for high delivery) Max. flow for inlet section l/min PLD 10 35 Tightening torque

STANDARD COMPOSITIONS FOR SECTIONS WITH OR WITHOUT VALVE 2 SECTIONS WITH 1 INLET SECTION 3 SECTIONS WITH 1 INLET SECTION 4 SECTIONS WITH 1 INLET SECTION 5 SECTIONS WITH 2 INLET SECTIONS 6 SECTIONS WITH 2 INLET SECTIONS Note: Combinations between different groups (PLD10 / PLD20) are available. For more informations please consult our technical sales department.

Tightening torque for low pressure side port Tightening torque for high pressure side port [values obtained at 5075 psi (350 bar)] GAS STRAIGHT THREAD PORTS BSPP British standard pipe parallel (55°) conforms to UNI - ISO 228 CT> O) O CODE Nominal size SAE STRAIGHT THREAD PORTS J514 ODT American straight thread UNC-UNF 60° conforms to ANSI B 1.1 a> CT) o Nominal size

^CASAPPA Pl. FLUID POWER DESIGN POl&lh IN and OUT ports dimensions are shown on page 14 and page 15. Type mm (in) mm (in) mm (in) mm (in) mm (in)

3 CASAPPA P, . FLUID POWER DESIGN POl&lh Type mm (in) mm (in) mm (in) mm (in) mm (in)

^CASAPPA Pl. FLUID POWER DESIGN POl&lh Type mm (in) mm (in) mm (in) mm (in) mm (in)

FLUID POWER DESIGN POl&lh A B C D E Type mm (in) mm (in) mm (in) mm (in) mm (in)

Only for version with valve SAE STRAIGHT THREAD PORTS (ODT) CD Right inlet section (1) Left inlet section (1) CS VPEF Relief valve Code Valve setting [bar] 10 Code T outlet port dimensions 11 GAS STRAIGHT THREAD PORTS (BSPP) GC PLD 10 SAE STRAIGHT THREAD PORTS (ODT) OA PLD 10 (1) Looking at the sections from the outlet ports side. (2) Choice the inlet selections number according to the general data on page 12 and 13. (3) Omit this code for Buna seals.

'A CASAPPA FLUID POWER DESIGN NOTES

3 CASAPPA FLUID POWER DESIGN NOTES

Our policy is one of continuous improvement in product. Specification of items may, therefore, be changed without notice.

Edition: 03/01.2013 Replaces: PLD 02 T A CASAPPA S.p.A. Via Balestrieri, 1 43044 Cavalli di Collecchio - Parma (Italy) Tel. +39 0521 304111 Fax +39 0521 804600 E-mail: info@casappa.com www.casappa.com