3 10 sec. at minimum continous pressure intermittent pressure 20 sec. at minimum Time Pressure pI pII Peak pressure pIII pIII pII pI WQ900 DESCRIPTION TheWQ900 pumps are part of theW-family of gear pumps. The WQ900 pumps come in 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 theWQ900 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. Awide range of mounting flanges and port sizes are available to meet international standards. 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 4-7) 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 which can be expected from units incorporating flange 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 4-7 for respective models. Maximumspeed formultiple pumps is the lowest one specified (See tables on pages 4-7) for any section of the configuration in question. Noise performance data according to page 10-11. Hydraulic fluids. The use of HL-or HLP-hydraulic oil according to DIN 51 524 is recommended. The permissible viscosity for all WQ9A pumps 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 Concentric before using fire resistant or bio-degradable fluids. Temperature range Ambient 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 remainwithin the range specifiedunder ”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 PERFORMANCE DATA General data Displacement V 5 - 23 cc/rev Speed n 500 - 4000 rpm Pressure rated pressure pl up to 230 bar intermittent pressure pll up to 255 bar peak pressure plll up to 276 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 or flange ports. • Clockwise or anti-clockwise rotation. • Integrated valve features. • Single inlet for multiple units. Model code example for a single pump = Type = Range = Design = # of sections = Seal material = Displacement per section = Rotation = Mounting flange = Drive shaft = Portings = Valve options Pressure pulsation minimized to 25 % The size of pressure pulsation from the pumps is reflected in the low pump noise level. 1 2 3 4 5 6 7 8 9 10 11 WQ 09 A 1 B 050 R 03 BA 150 N 1 2 3 4 5 6 7 8 9 10 11 quality products for mechanical & fluid power ~ jbj Techniques Limited, www.jbj.co.uk UK distributor for Concentric Hydraulics
RkJQdWJsaXNoZXIy NzQyNjQ=