Concentric AB-CALMA SERIES-EU-2011-7 3 CALMA DESCRIPTION The key performance features of Calma are its low noise operation over a wide speed range. Like its predecessor the WQ pump Calma is a three piece modular design. The pump body is manufactured from high strength aluminum alloy. The mounting flange and rear cover are of cast iron. The Calma pumps come in single or multiple configuration of up to four sections. 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 areTeflon® coated and designed for long service life. They are continually cooled and lubricated by a controlled flowof fresh oil.This enables operation across a wide speed range at very high loads. Multiple pumps in the Calma 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 units. A wide 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 6-9) Speed range Minimum speed for all pump sizes is n=500 rpm at maximum operating pressure. L (WSR) Wide operating speed range with low speed capability adds min. speed n=400 rpm at max. operating pressure. Maximum speed for single pumpsdepends on the pump model in question and can be identified from tables on pages 6-9 for respective models. Maximum speed for multiple pumps is the lowest one specified (See tables on pages 6-9) for any section of the configuration in question. Noiseperformance data according to page 5. Hydraulic Fluids The use of HL-or HLP-hydraulic oil according to DIN 51 524 is recommended. The permissible viscosity for all Calma pumps is from 750 to 10 mm2/s. The recommended operating viscosity range is from 40 to 16 mm2/s. Thepermissiblecoldstartviscosity is2000mm2/s. We recommend you contact Haldex before using fire resistant or bio-degradable fluids. Viscosities (when operating at above temperature limits) have to remain within the range specified under ”Hydraulic Fluids”. Temperature range Ambient temperature min. -25° C max. +80° C Fluid temperature continuous operation max. +90° C intermittent operation max. +105° C Please note Fluid cleanliness Fluid cleanliness according to ISO 4406/1999 [-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) 6,2 - 23,7 cc/rev WideSpeedRange(WSR)(n) 400-4000rpm Pressure Operating pressure (p 2 ) max. 250 bar Operating temperatures (t) max. 105°C Typical volumetric efficiency 97% The maximum values for n, p 2 and t for a given pump specification may be applied simultaneously. Options • Mounting flanges - SAE, rectangular and through bolt. • Shafts - Tang, spline, tapered or straight with key. • Ports - Thread or flange. • Rotation - CW or CCW. • Integrated valves. • Single inlet for multiple units. Model code example for a single pump Pressure pulsation reduced by 75%. The size of pressure pulsation fromthe pumps is reflected in the low pump noise level. 1 2 3 4 5 6 7 8 9 10 11 WK 09 A 1 B 060 R 03 BA 150 N = Type = Range = Design A - Std. Calma Design L - L (WSR)* = # of sections = Seal material = Displacement per section = Rotation = Mounting flange = Drive shaft = Portings = Valve options 1 2 3 6 7 8 9 10 11 4 5 * L (WSR) Wide operating speed range with low speed capability n=400 rpm at max. operating pressure p 2 .
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