Grundfos NK Montage- Und Betriebsanleitung Seite 14

Example 1 - (pump design according to EN 733)
Example 2 - (pump design according to ISO 2858)
Example 1 shows an NK 32-125.1 pump with
• reduced performance
• 142 mm impeller
• grease-lubricated standard bearing design
• standard coupling
• DIN flange to EN 1092-2 pipework connection
• PN 10 flange
• cast iron pump housing, EN-GJL-250
• cast iron impeller, EN-GJL-200
• bronze/brass wear ring
• stainless steel shaft, EN 1.4021/1.4034
• EPDM pump cover O-ring
• single shaft seal arrangement
• BAQE shaft seal.
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NK 32 -125 .1
NKG 125 -100 -160
Example 2 shows an NKG 125-100-160 pump with
• 160-142 mm conical impeller
• grease-lubricated heavy-duty bearing design
• spacer coupling
• DIN flange to EN 1092-2 pipework connection
• PN 25 flange
• stainless steel pump housing, EN 1.4408
• stainless steel impeller, EN 1.4408
• carbon-graphite filled wear ring, PTFE (Graflon®)
• stainless steel shaft, EN 1.4401
• FFKM pump cover and seal cover O-rings
• EPDM seal housing O-ring
• back-to-back double shaft seal arrangement
• primary shaft seal: DQQK
• secondary shaft seal: DQQE.
/142 A1 F 1 A E S BAQE
/160-142 H2 F 3 N KE O 2926