Valve leakage is a common issue in industrial production and pipeline systems. It can cause resource waste, pollution, and even safety incidents. Below are the typical causes and solutions for valve leakage, divided into internal leakage (when the valve does not close tightly) and external leakage (when the valve body or its connections leak).<\/p>\n
analysis of causes \uff1a
\nSeal face damage
\n\u25b7 Particulate matter in the medium washes the sealing surface (such as sand particles, welding slag).
\n\u25b7 Corrosion or chemical erosion causes damage to the sealing surface (e.g., acid medium).
\nSeal aging or wear
\n\u25b7 Rubber, PTFE and other soft sealing materials aging, cracking.
\n\u25b7 Metal seal surface due to long-term friction wear.
\nThe valve is not completely closed.
\n\u25b7 Insufficient operating torque ( handwheel is not tightened, actuator is faulty).
\n\u25b7 Valve stem thread or transmission parts are blocked.
\nImpurities stuck in the valve core\/valve seat.
\nImpurities (such as rust and scaling) in the pipeline are stuck between the sealing surfaces.
\nResolvent\uff1a
\nClean or repair the sealing surface: remove the valve, grind the metal sealing surface or replace the soft sealing pad.
\n\u25b7 Replacement of seals, such as valve seat, valve disc seal, or O-ring.
\n\u25b7 Completely close the valve: check whether the actuator (e.g., electric or pneumatic) is in place, and confirm that the manual valve is completely closed.
\n\u25b7 Drain pipe: remove impurities, and install a filter in front of the valve if necessary.
\n\u25b7 Choose corrosion-resistant materials: such as stainless steel valve seat or inlined valve (for corrosive media).<\/p>\n
1. Leakage at valve stem (packing leakage)
\n\u25b7 Wear or aging of packing.
\n\u25b7 Packing gland bolt is loose.
\n\u25b7 Valve rod scratches or corrosion.
\nsolve \uff1a
\n\u25b7 Tighten or replace the packing (be careful not to overpress the valve stem to jam).
\n\u25b7 Replace the valve stem or repair surface scratches.
\n2. Leakage at valve body or flange connection
\ncause \uff1a
\n\u25b7 The pre-tightening force of the flange bolt is insufficient or loose.
\n\u25b7 Damaged gaskets (such as metal winding gaskets, rubber gaskets) or wrong selection.
\n\u25b7 Valve body casting defects (sand hole, crack).
\nsolve \uff1a
\nRe-tighten bolts (apply even force in diagonal order).
\n\u25b7 Replace the temperature and pressure resistant gasket (such as metal gasket selected for high temperature operation).
\n\u25b7 Valve body cracks can be repaired by welding (safety assessment is required), and replaced if severe.
\n3. Valve cover or weld leakage
\ncause \uff1a
\n\u25b7 Casting defects or poor welding.
\n\u25b7 Stress cracking caused by temperature and pressure fluctuations.
\nsolve \uff1a
\nStop using the valve and replace it to prevent further problems.<\/p>\n
\u2666 Regular maintenance: check the condition of packing and sealing, and replace the vulnerable parts in time.
\n\u2666 Correct operation: avoid brutal operation to cause deformation of valve stem or damage of sealing surface.
\n\u2666 Working condition matching: heat-resistant valves (such as stop valve rather than ball valve) are selected for high temperature media. Plastic-lined valves or ceramic valves are selected for corrosive media.
\n\u2666 Installation of filter: install Y-type strainers in front of valve to prevent impurities from entering.
\n\u2666 Valve pressure test: strength test and seal test shall be carried out before installation of the new valve.<\/p>\n
\u2666 If the leakage can not be stopped immediately for maintenance: Valve leakage is a common issue in industrial production and pipeline systems. It can cause resource waste, pollution, and even safety incidents. Below are the typical causes and solutions for valve leakage, divided into internal leakage (when the valve does not close tightly) and external leakage (when the valve body or its connections leak). I. […]<\/p>","protected":false},"author":2,"featured_media":5037,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[121,122,117,120,123],"class_list":["post-5036","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ball-valve-china","tag-gate-valve","tag-industrial-valve","tag-valve-leakage","tag-y-strainer"],"acf":[],"_links":{"self":[{"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/posts\/5036","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/comments?post=5036"}],"version-history":[{"count":1,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/posts\/5036\/revisions"}],"predecessor-version":[{"id":5292,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/posts\/5036\/revisions\/5292"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/media\/5037"}],"wp:attachment":[{"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/media?parent=5036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/categories?post=5036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tops-valve.com\/es\/wp-json\/wp\/v2\/tags?post=5036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nUse a sealant (such as a metal patch) to temporarily seal it.
\nApply a leak-proof clamp (e.g., clamp + sealing gasket) in case of leakage.
\n\u2666 For high-risk media (toxic, flammable), the system should be isolated immediately and treated professionally.
\n\u2666 Depending on the leakage cause and valve type (gate valve, v\u00e1lvula de bola<\/a>, butterfly valve, etc.), the solution may need to be adjusted. It is recommended to combine the specific working condition analysis.<\/p>","protected":false},"excerpt":{"rendered":"