1, the common failures and the reasons of the valve is in the use of common faults in the process of the main valve: 1. Stem rotation is not flexible or jammed stem rotation is not flexible or jammed, the main reasons are: too tightly on the packing; When packing into the stuffing box norm; The valve stem and valve stem bushing USES the same material or improper material selection; The clearance between the sleeve and the valve stem is not enough; Stem bent; Thread surface roughness undesirable, etc. 2. The causes for the leakage of sealing leak sealing surface mainly has: the sealing surface damage, such as indentation, scratch, middle break; Between the sealing surface dirt adhesion or bad sealing ring connection, etc. 3. Packing of the leakage causes of the leakage of filler in are: packing clamp pressure; The packing is not enough; The packing failure due to improper safekeeping; Stem roundness in excess of the prescribed or stem surface has defects such as scratches, carved lines, and coarse hair,; The varieties, structure size of the packing or quality does not meet the requirements, etc. 4. Body and bonnet joint leakage of the possible reasons are as follows: flange joint bolts caused by uneven flange of the tilt, the bolt or tight force is not enough, the body and bonnet junction surface damage; Gasket damaged or do not conform to the requirements; The flange joint surface is not parallel, flange processing surface is bad; Stem bushing and stem thread processing bad make bonnet tilt. 5. Ram and bonnet interference occurs when open the gate to the fully open position, sometimes ram cannot achieve full open, and ram and bonnet interference phenomenon. The reason: ram installed incorrectly or bonnet geometry size does not conform to the standard requirements. 6. Gate closing of the main causes of such imprecise happen: shut down power is not enough; Between the seat and disc into sundry; The valve sealing surface processing is bad or damaged. 7. Other aspects, such as casting defects such as sand holes, sealing surface crack and may also affect the normal use of the Industrial Valves, must adopt corresponding measures to solve.
Nowadays, it is very common for us to utilise in y gate valve. And the quality of is decisive to production efficiency.
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Shenzhen Mech Valve Trading Co., Ltd., a manufacturer of flanged gate valve, might emphasize less hassle or less wasted time rather than emphasizing reliability or quality.