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51.—(1) Multiple-seal, and seal-less pumps, other than those specified in Dual-Use code 2B350.i, suitable for corrosive fluids, or vacuum pumps and casings (pump bodies), preformed casing liners, impellers, rotors or jet pump nozzles designed for such pumps, in which all surfaces that come in direct contact with the chemical(s) being processed are made from any of the following materials—
(a)alloys with more than 25 % nickel and 20 % chromium by weight;
(b)ceramics;
(c)ferrosilicon;
(d)fluoropolymers;
(e)glass (including vitrified or enamelled coatings or glass lining);
(f)graphite or carbon graphite;
(g)nickel or alloys with more than 40 % nickel by weight;
(h)tantalum or tantalum alloys;
(i)titanium or titanium alloys;
(j)zirconium or zirconium alloys;
(k)niobium (columbium) or niobium alloys;
(l)stainless steel;
(m)aluminium alloys; or
(n)rubber, including all kinds of natural and synthetic rubbers.
(2) For the purposes of this paragraph—
(a)the materials used for gaskets and seals and other implementations of sealing functions do not determine the status of control of the pump;
(b)“carbon graphite” has the meaning given to it in the Dual-Use Regulation.
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