AP series
26Pages

Non-standard symbols used in the text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identifying the rotation direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recommended fluids/Allowed temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor-pump coupling . . . . . . . . . . . . . . . . . . . . . . . . . . ....

General information 1.1 Introduction to the product Gear pumps are widely used in modern hydraulic systems due to their high performance, long service life and low pur­ chase and maintenance costs. - carefully controlled heat treatments - increasingly tight coupling tolerances, and a high standard of surface finish. Product development has made it possible to achieve high operating pressures, excellent volumetric and mechanical efficiency, and lower noise levels, in operation, by means of: Bucher Hydraulics S.p.A. has achieved these results by constantly improving its design, control, and...

1.2 Non-standard symbols used in the text Check nut Hexagonal-head screw ( TE screw) Lock washer Socket head screw (TCE screw) Dynamometric spanners Version with front and rear cover in cast iron, available Technical information 2.1 Identifying the rotation direction The rotation direction of a gear pump is identified by looking at the pump from the front and with the drive gear turned up­ wards (see figures below). Pumps with clockwise rotation (D) have a drive gear which turns clockwise, with the suction port on the left and the pressure port on the right. Pumps with counterclockwise...

2.2 Recommended fluids/Allowed temperatures We recommend using only mineral oil-based hydraulic fluids that comply with the ISO/DIN standards. Viscosity range: recommended 20 ÷ 120 mm2/s (cSt) permitted up to 700 mm2/s (cSt) Operating temperature Attention: Use of pumps at temperatures above 80°C must always be agreed upon with our Tech­ nical Office, and in any case this can cause a sig­ nificant worsening in the volumetric efficiency. For use under conditions different from those indic­ ated in this catalogue, please contact our Sales Department 2.3 Suction The absolute suction pressure...

Absolutely no radial or axial forces should be transmitted to the drive shaft in the motor-pump coupling. Such forces cause rapid and irregular wear on the balan­ cing surface of the bushings and gear support, with a con­ sequent worsening in pump performance. The coupling joint must be able to absorb any discrepancies in the coaxial alignment of the motor-pump shafts without placing any load on the pump shaft. In the couplings between splined shafts, the connecting sleeve must be free to move along its axis. The length of the sleeve must be sufficient to cover the splined sections of the...

- Always check the rotation direction of the pump's drive shaft; it must be compatible with the rotation dir­ ection of the pump itself. - To ensure the best heat distribution inside the tank, make sure the return pipe is not too close to the pump's suction piping. The pipings themselves should be below oil tank level to prevent the forma­ tion of foam. - Be particularly careful in cleaning and make sure, when connecting the suction and pressure piping, that no chips, rag threads, teflon tape, etc. get into the pump circulation system. - Do not subject the pumps to operating conditions dif­...

2.8 Calculating the specification of a gear pump The following parameters are defined: = (r/min) no. of rpms of the drive shaft; Q = (l/min) flow rate; p ηv = (%) volumetric efficiency; ηm = (%) mechanical efficiency; ηt = (%) total efficiency Q= Important: Please contact our Sales Department if even one of the operating limits indicated in the tables below (temperature, pressure, rpm) is exceeded, as well as in the case of two or more maximum values at the same time, or for applications with particularly heavy-duty cycles. AP/APR05

Gear pump group AP05 Max torque allowed to the shaft Last number of pump code Clockwise (D) Counter-clockwise (S) rotation D S AP Reversible rotation Notes: - For uses at the operating limits, see note in section 2.8 - For the types of pumps without ordering code, contact our Sales Dept.

Reversible pump External Drain Dimensions Type Reversible pump - External Drain Order Code Order Code Order Code

Reversible pump External Drain Drain Reversible pump - External Drain Order Code Order Code Order Code

Order Code Order Code

Order Code Order Code

The drawing shows a pump with clockwise rotation. Order Code Order Code

The drawing shows a pump with clockwise rotation. Dimensions Displacement cm3/rev Clockwise rotation: D Type Order Code Counter-clockwise rotation: S Type Order Code

Reversible pump External Drain Dimensions Type Reversible pump - External Drain Order Code Order Code Order Code

Clockwise rotation: D Type Order Code Counter-clockwise rotation: S Type Order Code

Clockwise rotation: D Type Order Code Counter-clockwise rotation: S Type Order Code

Order Code Order Code

The drawing shows a pump with clockwise rotation. Order Code Order Code

The drawing shows a pump with clockwise rotation. Order Code Order Code

3.1 Pumps seal kit NBR standard type AP05/839 Composition of product code 4.1 Single pumps Type Order Code 4.2 Product identification plate 4.3 Single pump weight 1 : Rotation (D= Clockwise rotation - S= Counterclockwise rotation) 2 : Manufacturing year and month N.B.: The weight refers to pumps with version code 810 (AP05) 3 : Progressive identification no. (optional) Limited weight variations are possible for pumps having a different code. 4 : Bucher Hydraulics S.p.A. product code 5 : Description Manufacturing year Manufacturing month

info.it@bucherhydraulics.com www.bucherhydraulics.com © 2012 by Bucher Hydraulics S.p.A, 1-42124 Reggio Emilia Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual improvement, we reserve the right to amend the product specifications contained in this catalogue.