DESMI PUMPING TECHNOLOGY A/S P a g e | - 67 -Tagholm 19400 Nørresundby - DenmarkPhone.: +45 96 32 81 11Fax : +45 98 17 54 99E-mail: desmi@desmi.comwww.desmi.com21.1.1 Checking the axial clearanceThe axial clearance can be checked as described below:Non-installed pump:The pump’s axial clearance can be checked with an air gap gauge which is passed in throughone of the pump’s ports between the rotor/idler and the front cover.The axial clearance identified must correspond to the values in the table in Figure 43.Installed pump:The axial clearance cannot be checked when the pump is installed in a pipe system.The play must therefore be reset as described in the section entitled: “Setting of axialclearance”.Axial clearancePump size 26/33 41 51/66 81/101 126/151 152 201 202Normal axialclearance*Min. 0.100.1250.100.150.150.200.200.250.300.3750.350.450.400.500.60Max. 0.70Pumps withspec. tolerances**Min. 0.200.250.200.300.300.400.400.500.600.750.700.900.801.01.0Max. 1.2Stainless pumps* - To be set with 0.10 mm more play than specified aboveFigure 43:The axial clearance in mm for the various pump sizes for standard pumps and pumps with specialtolerances respectively. This table applies to pump types HD, CD, PD, GP, CC and ED.The pump size appears from the pump designation. Example: CD26EFMDK-3U332.* Pumps made of stainless steel are set with 0.10 mm more play than specified. Pumps made of stainless steel arecharacterised by the figure “4” in the pump designation. Example: CD26EFMDK-3U332** Pumps with special tolerances are identified by the inclusion of a “T” or “CHD” in the designation.Example: HD/CD41EFCHD-1M22B or GP101EDT-1U22B – see also the section ”Pump versions”.
