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When the valve is assembled, the degree and sequence of bolt tightening has a direct effect on the quality of its assembly. Tighten the bolts for the general easier to handle, the connector is not loose on it. However, the gasket, packing structure of the bolt tightening, there should be prior, symmetrical, turns Tightening. When each bolt is tightened, check whether the flange is skewed and measure the gap between the flanges for correctness. Tighten the bolts symmetrically in turn, and tighten to a small amount of 1 / 4-1 / 2 turns until the required preload force is reached. Pay special attention not to over-tighten, so as not to crush the gasket, the general twist to leak does not prevail. Finally check the flange clearance, the gap should be consistent and maintained at 2mm above. This keyword search: More Valve products supply information