元立阀门、止回阀、碳钢升降式止回阀H41H-16-25C、不锈钢升降式止回阀H41W-25P/R、碳钢旋启式止回阀H44H-64C、不锈钢旋启式止回阀H44W-25P\R、碳钢立式止回阀H42H-25C、不锈钢立式止回阀H42W-25P/R、高温高压升降式焊接止回阀H61Y/H、高温高压旋启式焊接止回阀H64Y/H、铸铁升降式止回阀H41T-10/16、铸铁旋启式止回阀H44T-10/16、不锈钢丝口升降式止回阀H11W-16P/R、不锈钢丝口旋启式止回阀H14W-16P/R