因此输送硫酸的泵阀通常采用高硅铸铁泵(铸造及加工难度大)、高合金不锈钢泵(20号合金)制造。
Therefore transportation of sulphuric acid valve is usually a high silicon iron pump (casting and machining difficult), high-alloy stainless steel pumps (on the 20th alloy) manufacturing.
喷射泵可由各种各样的材料制成，例如铸铁、钢、不锈钢、哈氏合金、钛、搪瓷、玻璃、塑料和石墨，并可制成各种尺寸。
Jet pump may be all kinds of material, such as cast iron, steel, stainless steel, Hastelloy, titanium, ceramic, glass, plastics and graphite, and made of various sizes.
泵壳，叶轮，电机壳和固定底座弯头都应该采用符合美国材料试验协会ASTM A48级别30致密铸铁制造。
The pump casing, impeller, motor housing and stationary base elbow shall be manufactured of close-grained cast iron, ASTM A48, Class 30.
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