DESMI PUMPING TECHNOLOGY A/S P a g e | - 16 -Tagholm 19400 Nørresundby - DenmarkPhone.: +45 96 32 81 11Fax : +45 98 17 54 99E-mail: desmi@desmi.comwww.desmi.com6.2 Pump versionsSealing with packing coil, with or without lanternring for external lubrication. Used for liquids withhigh viscosities and where leaking is allowed.M – GP/HDSealing with single mechanical shaft seal,DIN 24960/EN 1275-KU, together withball/roller bearing as main bearing. Used whereonly minor leaking can be accepted.M –PD/CDSealing with single mechanical shaft seal,DIN 24960/EN 12756-KU, together with media-lubricated slide bearing as main bearing. Usedwhere only minor leaking can be accepted.MM (tandem) - MMP (back to back)Double mechanical shaft seal. DIN 24960/EN12756-KU, in tandem or back-to-back, with mainbearing in the blocking liquid. Used where noleaking is allowed. A differential pressure of up to6 bar above the pump is allowed.MMW (tandem) - MMPW (back to back)Double mechanical shaft seal, DIN 24960/EN12756-KU, in tandem or back-to-back, with mainbearing in the liquid. Used where no leaking isallowed. A differential pressure of up to 16 barabove the pump is allowed.TSpecial tolerances. Increased tolerances areused for liquids with viscosity above 7500 cSt orat temperature above 150°C.DHeating jackets on front cover is often necessarywhen pumping highly viscous liquids or liquidsthat tend to coagulate.KHeating jacket on the rear cover is oftennecessary when pumping highly viscous liquidsor liquids that tend to coagulate. Can also beused as cooling jacket for shaft sealing.CHDCombination of special tolerances and heatingjackets together with external lubrication ofmain bearing. Used in the chocolate industry.
