AP312-HP
46Pages

Single and multiple cast iron gear pumps

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External gear pumps components and construction / benefits . . . . . . . . . . . . . . . . . . . . . . . . Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suction . . . . . . . . . . . . . . . . . . . . ....

General information The product range of Bucher Hydraulics SpA includes single pumps 05-100-212-212HP-250HP-300-312HP (cor­ responding with the common group denominations: 05-1-2-2.5-3) and several combinations of double pumps, triple pumps, and so on, that can be assembled together ac­ cording to versions of displacement, flanging, and auxiliary valves . Bucher Hydraulics SpA has supplied a wide range of ex­ ternal gear pumps and motors to industrial and mobile ap­ plications since many years. Bucher’s external gear pumps are widely used in modern hydraulic system to obtain high...

Cast iron front cover: the standard front-cover design can be fitted to two different pump interfaces ;B]|||||||hh Cast iron main pump body: wide range of displacements obtainable with two different basic bodies both with back cover integrated. Rear ports on request. HNBR seal material instead of NBR E1 Double HNBR shaft seals Strong pressure-balance plate instead of aluminium. Balancing area and intermediate notches optimised Large-diameter bearings, fitted both in front cover and body Large number of teeth, tooth profile optimised, larger shaft diameter BENEFITS ISCBP Flexibility/smaller...

1.2 Technical data Features * Extreme working temperature limits values can not be combined **: The max admitted speed is referred to single pump/single inlet configuration. In case of multiple pumps with common suction line, a speed reduction must be considered. igg= IMPORTANT!: The pressure values are referred to unidirectional pumps, single versions only. Please consult Bucher Hydraulics if even one of the operating limits indicated in the table (temperature, pressure, rpm) is exceeded, as well as in the case of two or more maximum values at the same time, or for applications...

Pressure levels: P1 = continuous pressure P3 = peak pressure The recommended oil speed in the pressure pipes is: v = 2 to 5 m/s 1.4 Suction The absolute suction pressure must be Pin . 0.75 bar (11 PSI); therefore, the following must be avoided: - large height differences between pump and tank It is also advisable to choose a filter of a suitable size to min­ imise any pressure drop and to take measures to prevent gradual clogging over time. - long stretches of piping - special features such as: - bends - reductions in diameter - quick couplings - etc. Pout - Always check the rotation...

In order to ensure proper operation and long life of the pump components it is extremely important to provide a proper and effective filtration of the hydraulic fluid. It is advisable to follow filter manufacturers instruction and recommendations. The fineness of the filter should be selected in order to guar­ antee that a contamination levels indicated on section 1.2. When the high reliability of the system is an important re­ quirement, a pressure filter must be used. In these cases it is also advisable to use a pressure filter with by-pass and indicator. The size of the return filters...

1.7 Formulas to determinate main gear pump operate parameters The following parameters are defined: Vc = (cm3/rev) pump displacement; n = (rev/min) no. of rpms of the drive shaft; Q = (l/min) flow rate; p hv = (%) volumetric efficiency; hm = (%) mechanical efficiency; ht = (%) total efficiency Q=

2 Overview standard pump configurations This pumps configuration are considered as “standard” 13 teeth external spline SAE J 498-13T 16/32 DP S38B2S In the next pages, front, body/rear cover, and seals materials are listed for each pump series. For ordering purposes, it is enough to outline the complete pump description (for example: AP312HP/40 S38B2S). In case of a different configuration request (or a combination of different features, such as port threads, front flange materials, etc.), the description configurator shown in section 3.1 can be easily used. 2.1 Standard components...

Pump description example: AP312HP/40_S_S38B2S Pump size Displacement Series Rotation (S= Left-hand rotation, D= Right-hand rotation)

Pump description example: Pump size Displacement Series Rotation (S= Left-hand rotation, D= Right-hand rotation)

Suction - Pressure Pump description example: AP312HP/63_D_S38B8S Pump size Displacement Series Rotation (S= Left-hand rotation, D= Right-hand rotation)

Pump description example: Pump size Displacement Rotation (S= Left-hand rotation, D= Right-hand rotation)

Pump description example: AP312HP/63_D_S48C8G I__ILJ LJ I__I Pump size Displacement Series Rotation (S= Left-hand rotation, D= Right-hand rotation)

Pump description example: AP312HP/63_D_S48C8S I__ILJ LJ I__I Pump size Rotation (S= Left-hand rotation, D= Right-hand rotation)

Balancing plate In this section, a single AP312HP pump can be configured and customized. AP312HP wide availability of covers, bodies and gears provides great flexibility to AP312HP pump range and allows several different pump configurations. In order to simplify the selection of the desired pump combination, a 'configurator form' is available and, by filling it out, it will guide you in the pump creation process.

3.1 Single pump customised versions order example A Function AP= single gear pump - unidirectional Rotation S = Left-hand rotation D = Right-hand rotation Shaft end code see section 3.3 Front cover type see section 3.4.1 Type of ports code Inlet/outlet port size code combination Circuits/Valves option see section 5 BHRE section : Version - Progressive number (omitted) Unpainted pumps are Bucher Hydraulics standard; should a painted component be required, this feature must be specified in its purchase order.