By tests to determine the lining thickness δ≥2mm more appropriate. And with the increased diameter of the pump to increase the density of fluorine plastic should be used in about 2.16g / cm3, chemical pumps, and does not allow the presence of impurities in the raw materials. Lining material for food, medicine, sanitary valves, also non-toxic, sterile, no impurities clean material. Surface fluorine plastic valves should be smooth, without pores, cracks, inclusions and other defects. Flange at the flange and the other at the corner should be uniform color, no whitening phenomenon. Large-diameter welded steel fluorine plastic centrifugal pump can be used the way, the welding point in line with GB / T150 standards. The internal shape of fluorine plastic centrifugal pump should be as simple, easy liner and mold making, case by lining should be smooth and should show all of the corner arc transition, nitric acid pumps chemical pumps, arc radius R≥2mm. IHF fluorine plastic pump liner layer can be arranged in a fixed manner denser annular dovetail method on the base metal, the liner layer is fixed firmly, while a smaller amount of machining. The method can also be arranged on the base metal more dense holes (or threaded holes), the backing layer is better dovetail securely fixed, and a large amount of machining. In order to prevent temperature changes caused by the non-metallic or crack off from the pump casing, lined chemical pumps, shells welded wire mesh can be considered in the centrifugal pump casing, so that the plastic-lined pumps can do the larger size models, imported diameter maximum up ф600mm. Chemical pumps, chemical pump mechanical seal, IHF80-50-315 (certified merchants) are provided by Shijiazhuang-Pump Co., Ltd. faction. Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) is specialized in "slurry pumps, submersible pumps, sewage pumps, chemical pump, pulp pump, water pump, mud pump, multi-stage" of the enterprise, the company of " honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Xu.