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Viking Single External Gear Pumps & Viking Double External Gear Pumps

Materials of Construction

Component	Standard SG-04, -05, -07	Standard SGN-05, -07	Standard SG-10, -14	Options
Bracket	Cast Iron ASTM A823 Class 25	Ductile Iron ASTM A536 Grade 65-45-12	Cast Iron ASTM A48 Class 35B	Hardening (Vitek)
Casing	Cast Iron ASTM A823 Class 25	Ductile Iron ASTM A536 Grade 65-45-12	Cast Iron ASTM A823 Class 25	Hardening (Vitek)
Head, Separation Plate	Cast Iron ASTM A823 Class 25	Ductile Iron ASTM A536 Grade 65-45-12	N/A	Hardening (Vitek)
Relief Valve Body	Cast Iron ASTM A823 Class 25	Ductile Iron ASTM A536 Grade 65-45-12	Cast Iron ASTM A48 Class 35B	---
Relief Valve Poppet	375 Steel	375 Steel	Ductile Iron ASTM A48 Class 35B	---
Relief Valve Spring	Steel ASTM A229	Steel ASTM A229	Chrome Base Silicon ASTM A401	---
Gears	Heat Treated Steel ASTM A322 Grade 8620	Heat Treated Steel ASTM A322 Grade 8620	Heat Treated Steel ASTM A322 Grade 8620	PPS (composite)
Shafts	Heat Treated Steel ASTM A322 Grade 8620	Heat Treated Steel ASTM A322 Grade 8620	Heat Treated Steel ASTM A322 Grade 8620 172	---
Anti-Friction Needle Bearings (1)	Steel	Steel	Steel	---
Sleeve Bearings	---	---	---	Carbon Graphite (2) High Temp Carbon Graphite Silicon Carbide (3)
Outboard Ball Bearing	---	---	---	Steel
O Rings	Buna-N	Buna-N	Buna-N	Viton®, PTFE, Kalrez®
Lip Seals	Buna-N	Buna-N	Buna-N	Viton®, PTFE
Component Mechanical Seals	Carbon/Ni-Resist	Carbon/Ni-Resist	---	Carbon/Silicon Carbide, Silicon Carbide/Silicon Carbide
Canister (4)	316L Stainless Steel	316L Stainless Steel	---	Hastelloy® C22
Magnetic Coupling (4)	Cast Iron	Cast Iron	---	---
Magnets (4) (Outer magnets nickel plated, inner magnets sealed in SS canister)	Neodymium Iron Boron	Neodymium Iron Boron	---	Samarium Cobalt
'B' Drive Foot Bracket	Cast Iron ASTM A48 Class 35B	Cast Iron ASTM A48 Class 35B	Cast Iron ASTM A48 Class 35B	---
'M' Drive Motor Bracket	Cast Iron ASTM A48 Class 35B	Cast Iron ASTM A48 Class 35B	Aluminium AAA Designation 319 or AAA Designation 383.1	---

(1) Need bearings standard with lip seals
(2) Carbon graphite journal bearings standard with mechanical seals or sealless mag drive series
(3) Tungsten carbide coated shafts recommended with silicon carbide journal bearings
(4) Sealless mag drive version

michael smith
engineers ltd