W900 DESCRIPTION The W900 pumps are available in a single or multiple configuration of up to four sections. The basic pump is of a three piece modular design. Mounting flange and rear cover are of cast iron. The pump body is manufactured from high strength aluminium alloy. For optimum strength, gears and shafts are precision machined in one piece. The 13-tooth gear geometry has been optimized for low noise level. All shaft bearing surfaces are Teflon® coated and designed for long service life. They are continually cooled and lubricated by a controlled flow of fresh oil. This enables operation across a wide speed range at very high loads. Multiple pumps in the W900 range are very compact. The drive shaft is capable of transmitting high torque even to the rear section. Each section has its own inlet and pressure ports. Single inlet features are optional for 2 and 3 section unit. PERFORMANCE DATA 10 sec. at minimum continous pressure intermittent pressure 20 sec. at minimum Time Pressure pI pII Peak pressure pIII pIII pII pI 3 Awide range of mounting flanges and port sizes are available to meet international standards. General data Displacement V 5 - 31cc/rev Speed n 500 - 4000 rpm Pressure rated pressure pl up to 276 bar intermittent pressure pll up to 300 bar Operating temperatures t up to 105° C Average volumetric efficiency 97% The maximum values for n, pl and t for a given pump specification may be applied simultaneously. Options • SAE mounting flange, through bolt model. • Rectangular flanges. • Splined, tapered or straight shaft with key, tang shaft. • Thread ports of flange ports. • Clockwise or anti-clockwise rotation. • Integrated valve features. • Single inlet for multiple units. Model code example for a single pump = Type = Series = Design revision = # of sections = Seal material = Displacement per section = Rotation = Mounting flange = Drive shaft = Portings = Valve options 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 11 WP 09 A 1 B 050 R 03 BA 150 N Operating pressure range Inlet port: continuous, minimum -0,20 bar intermittent, minimum -0,35 bar maximum +2,00 bar Outlet port (See tables on pages 4-9) Product has been tested to 1,000,000 cycles at pl. Pressure pll is permitted at maxi. 20 sec loaded following 10 sec minimum unloaded. Product has been tested to 500,000 cycles at pllI. Above represents performance wich can be expected from units incorporating flange port styles. Speed range Minimum speed for all pump sizes is n=500 rpm at maximum pressure pl. Maximum speed for single pumps depends on the pump model in question and can be identified from tables on pages 4-9 for respective models. Maximumspeed formultiple pumps is the lowest one specified (See tables on pages 4-9) for any section of the configuration in question. Noise performance data according to DIN 45 635. Typical levels at 200 bar and 2300 rpm using mineral oil with viscosity of 40 mm2/s and at temperature of 50° C: W9A1-08 W9A1-16 W9A1-23 60 dB(A) 65 dB(A) 68 dB(A) Hydraulic fluids. The use of HL-or HLP-hydraulic oil according to DIN 51 524 is recommended. Thepermissible viscosity for allW900pumps ranges from 750 to 10 mm2/s. The recommended operating viscosity range is from 40 to 16 mm2/s. Thepermissible cold start viscosity is 2000mm2/s. We recommend to contact Haldex before using fire resistant or bio-degradable fluids. Temperature range Amb. temperature mini.-25° C maxi. +80° C Fluid temperature continuous operation maxi. +90° C short term operation maxi. +105° C Please note Viscosities -when operating at above temperature limits-have to remain within the range specified under ”Hydraulic Fluids”. Fluid cleanliness Fluid cleanliness according to ISO 4406/1986 code 18/14 or better is required in order to assure the pump’s high level of efficiency in the long term. Drive arrangement Flexible couplings are preferred for direct drives. Please contact Concentric for indirect drive requirements. Pumps with outboard side load bearing are available. Mounting position As required. Symbols Single pump Double pump Triple pump Quadruple pump 9 10 11 quality products for mechanical & fluid power ~ jbj Techniques Limited, www.jbj.co.uk UK distributor for Concentric Hydraulics
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