液体或泥浆绝对不会接触阀杆螺纹。
公司生产泥浆泵活塞胶皮、柱塞泵盘根、各种阀胶皮，其产品性能及使用寿命均达到国外同类产品先进水平。
What's more, piston rubber for mud pumps, packing for plunger pumps and various kinds of valve rubber can rival with the international similar products in performance and service life.
针对油隔离泥浆泵单向阀拆卸难的情况，设计了简单有效的修复单向阀的工具。
Being directed against difficult disassemble of unilateral valve from oil isolated mud pump, a simple and effective tool for repairing of unilateral valve is designed.
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