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Materials of construction - metal parts 

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Materials of construction.
This is not a bill of materials and should be used for guideline purposes only.

Wetted metal parts

Part

Pump range

Production method Material
Pump cover (casing) H, CH,
D1X, D2, D121
D3, D4, D5, D6,
GP, Two-Way
Fabricated from raw materials 316L / 1.4404
Impeller key1 Machined from key steel
Impeller lock nut and stub shaft1 Machined from a single billet of solid bar
Pump housing plate  H, CH,
D2, D121
D3, D4, D5, D6
Flanged adaptor D1X, GP, Two-Way
Impeller back plate H, CH,
D3, D4, D5, D6 
Impeller vane plate  H, CH,
D2, D121
D3, D4, D5, D6,
GP, Two-Way
D1X Fabricated from raw materials
All CR Investment cast
Mechanical seal All Bought in 3162 / 1.4401

ıStrictly speaking, where sealed with an impeller joint ring, the stub shaft and the impeller key do not normally come into contact with the product during operation, but such contact is likely during seal replacement, for example.
²We shall advise customers in circumstances where a mechanical seal is supplied whose wetted metal parts are not of stainless steel 316 (1.4401).
Alloys such as Carpenter (Alloy 20Cb-3), Hastelloy (Alloy C-276) and Monel (Alloy 400) are available on request.

Non-wetted metal parts (excluding motor³)

Part

Pump range

Production method Material
Motor adaptor plate H, CH,
D2, D121, D3, D4
Machined from a single billet of solid bar 316L / 1.4404
Flanged adaptor H141, H161, H191
D2, D121
H221, H241, H261 Assembled from two components, each of which machined from a single billet of solid bar
D3, D4, D5, D6 Fabricated from raw materials
Clamp ring handle H, CH, D
Clamp lugs and studs GP Machined from a single billet of solid bar
All CR Investment cast
Clamp ring washer H, CH, D Bought in 316 / 1.4401
Mechanical seal4 All
Flanged adaptor bolts H, CH, D
Wing nuts GP
Clamp ring H, CH, D Fabricated from flat bar (316L) and threaded bar (304) 304 / 1.4301
Motor adaptor plate D5, D6 Machined from a single billet of solid bar
Motor adaptor plate screws H, CH, D, GP Bought in
Outer cowl All Fabricated from sheet
Free-Standing Base (or cowl pedestal) Fabricated from flat bar (316L) or box section (304), and feet machined from solid bar (316L)

³The shaft clamp, where applicable, is also excluded.
4We do not advise customers in circumstances where a mechanical seal is supplied whose non-wetted metal parts are not of stainless steel 316 (1.4401), unless this information is requested.