Azbil HLS Series User Manual

Contents

Azbil HLS Series User Manual Manual pdf 95 page image

11-311-4. Assembling the parts of the gland11-4-1. Preparation for assembly(1) Checking the surface condition of the partsAny flaw or the like on the surface of the parts may cause leakage from that area, resulting ina total amount of leakage from the gland that exceeds the specified value. Therefore, check thesurface of the following parts.Table 11-1. Parts to be checked for surface conditionPart Checkpoints Possible problemsStem • N o f l a w s o r d e f e c t s ,including scratches anddents• No rust or corrosion• The entire surface is even.• No burrs• Clean surface, with noadhering coating material,powder, or dirt.• If necessary, take necessarymeasures such as cleaningwith alcohol.If the problems stated on the leftremain, fluid leaks from flawedareas may cause the total amountof leakage from the gland to exceedthe specified value.Stuffing boxBoth ends of the spacerPacking followerPacking contact surfaceO-ring groovePacking flangeGland nut contactsurfaceThe total amount of leakage fromthe gland may exceed the specifiedvalue because of insufficienttightening.Packing flange (entiresurface)Gland studGland nut• No flaws, rust, or defectsThe problems on the left, if theyremain, can cause control valvedamage, leading to injuries.