In industrial production, valves are critical components for fluid control, and their sealing performance directly impacts system safety and stability. Leakage not only reduces operational efficiency but may also lead to fluid escape, posing serious safety risks. This article outlines three common causes of valve leakage and provides corresponding emergency response recommendations to help you quickly identify issues, take action, and mitigate risks.   1. Seal Surface Wear or Damage   Cause: During long-term operation, sealing pairs (e.g., valve seat and disc, valve ball and seat) suffer from media erosion, particle abrasion, or corrosion, leading to uneven sealing surfaces and resulting in minor or significant leakage. Emergency Measures: · Minor Leakage: Adjust compression force (e.g., tighten bonnet bolts) to temporarily reduce leakage. · Severe Leakage: Immediately shut down the system to replace or regrind sealing components; replace the entire valve if necessary. Prevention Recommendations: Conduct regular inspections, select valves with appropriate materials and wear-resistant designs. For media containing solid particles, use hard-sealing structures.   2. Packing Aging or Gland Loosening   Cause: Valve stem sealing uses packing materials (e.g., graphite, PTFE), which may age, dry, or crack over prolonged use. Temperature fluctuations can also cause gland loosening, leading to leakage at the packing box.  Emergency Measures: · Tighten packing gland bolts to increase packing compression. · If ineffective, add or replace packing material. · Avoid over-tightening to prevent increased operating torque or stem damage. Prevention Recommendations: Regularly replace packing; select materials compatible with the media and operating temperature. For critical equipment, consider spring-loaded packing glands.   3. Casting Defects or Corrosion Perforation in Valve Body/Bonnet   Cause: Some low-quality valves have casting defects such as sand holes or shrinkage cavities. Prolonged exposure to corrosive media can cause localized perforation of the valve body, resulting in uncontrollable leakage. Emergency Measures: · For small leaks, temporary repairs using metal adhesives or cold welding are possible. · Large-scale damage requires immediate valve replacement. · For high-pressure or toxic/hazardous media, no pressurized repair is allowed; follow shutdown procedures strictly.  Prevention Recommendations: Purchase valves from reputable manufacturers; use corrosion-resistant materials (e.g., 304/316L stainless steel). Perform regular wall thickness inspections on critical pipelines.   Common Questions & Answers (Q&A)   Q1: Can all valve leaks be fixed by replacing packing?A: No. Packing replacement is effective only when leakage is due to packing aging or gland loosening. If the leakage stems from seal surface or valve body damage, other me...

In any efficient and reliable lubrication system, oil cleanliness is a core factor affecting equipment lifespan and operational efficiency. Strainers, as the front-line filtration devices in lubrication systems, play a critical role in pre-filtration. However, engineers and operators often raise the following questions: Can oil pass through strainers smoothly? What exactly is the function of a strainer? How does it differ from subsequent fine filters?   This article systematically explains the role of strainers in lubrication systems, covering their working principles, pre-filtration objectives, and practical applications across different systems.   1. Can Oil Pass Through a Strainer?   Answer: Yes, but with limitations.   (1) Strainer Structure Allows Oil Flow A strainer is fundamentally a low-precision filter made of stainless steel mesh or perforated metal plates. It features uniform pores, typically sized between 80–500 μm (micrometers), allowing most clean oil to flow through unimpeded.   (2) Contaminants Are Blocked Particles such as metal shavings, seal fragments, and carbon deposits in the oil are intercepted by the strainer, preventing them from entering the oil pump or other critical components.   (3) Oil Temperature and Viscosity Affect Flow Efficiency Low temperatures or high-viscosity oil may reduce flow rates or even cause blockages. This is one reason for low oil pressure during system startup.   2. Objectives and Significance of Pre-Filtration   (1) Protecting the Oil Pump Internal pump components (gears, impellers, or plungers) are highly sensitive to solid particles. Pre-filtration prevents particles from entering the pump, avoiding premature wear or seizure.   (2) Reducing Load on Primary Filters By intercepting large contaminants, strainers allow primary filters (e.g., oil filter cartridges) to focus on finer impurities, extending their service life and maintaining stable system flow.   (3) Lowering System Failure Rates Pre-filtration reduces risks such as pump failure, orifice blockages, and lubrication breakdown caused by foreign particles, enhancing overall system reliability.   3. Typical Applications of Pre-Filtration Devices   Application System Strainer Installation Position Strainer Type Internal Combustion Engine Lubrication Oil sump → Pump inlet Coarse metal strainer Hydraulic Systems Tank outlet → Pump suction port Suction strainer or basket strainer Turbine Lubrication Systems Pump inlet Dual-chamber switchable suction strainer Transmission/Clutch Systems Oil sump → Circulation pump inlet Perforated plate + magnetic strainer   4. Design and Usage Considerations for Strainers   (1) Pore Size Selection Must Align with System Precision Requirements 80–100 μm: Typical for engine oil systems. 150–300 μm: Used in hydraulic equipment. >400 μm:  Suitable for low-pressure or open-loop systems.   (2...

볼 밸브간단한 구조, 간편한 작동, 그리고 뛰어난 밀봉 성능으로 인해 산업 및 주거 분야 모두에서 널리 사용되는 제어 부품이 되었습니다. 특히 급수 시스템에서는 점점 더 많은 엔지니어와 설치자가 주요 유체 제어 장치로 볼 밸브를 선택하고 있습니다.하지만 볼 밸브가 정말 수처리 시스템에 적합할까요? 장기적으로 안정적인 작동을 보장하려면 어떻게 적절하게 선택하고 설치해야 할까요?이 기사에서는 구조적 원리, 성능 특성, 적용 권장 사항의 관점에서 포괄적인 개요를 제공합니다.1. 물 시스템에서 볼 밸브의 장점(1) 빠른 개폐볼 밸브는 간단한 90° 회전으로 개폐 작동을 완료할 수 있어 작동이 쉽고 반응성이 매우 뛰어납니다. 긴급 상황이나 자주 전환해야 하는 급수 시스템에 이상적입니다. (2) 우수한 밀봉 성능고품질 볼 밸브는 PTFE 또는 강화 씰링 소재를 사용하여 누수 방지 기능을 제공합니다. 특히 씰링 성능이 중요한 주거용 건물, 상업 시설, 산업 시설의 급수 시스템에 적합합니다. (3) 컴팩트한 구조 및 공간 절약게이트 밸브나 글로브 밸브와 비교했을 때, 볼 밸브는 차지하는 공간이 적고 설치가 유연하기 때문에 장비 통합성이 높은 수처리 모듈에 이상적입니다. (4) 강한 내식성스테인리스 스틸, 황동 또는 플라스틱 소재(UPVC 등)로 만든 볼 밸브는 우수한 내식성을 제공하며 다양한 수질(연수, 경수, 재생수)과 여러 첨가제를 처리할 수 있습니다. 2. 애플리케이션 시나리오 분석볼 밸브는 다음 유형의 물 시스템에 적합합니다.(1) 가정용 물 시스템: 건물 내부 물 공급, 위생 설비의 사용 지점 제어, 정원 관개 시스템 등.(2) 산업용수 시스템 : 냉각수 순환 시스템, 보일러 급수 시스템, 세척 장비의 급수 시스템 등.(3) 수처리 시스템: 역삼투압 전처리, 회수수 재활용 및 폐수 이송 공정을 포함합니다.(4) 특수 용도 : 고압 온수 시스템 또는 화학 첨가물이 포함된 세척수. 그러나 다음과 같은 경우에는 주의해야 합니다.(1) 고주파 변조 조건 표준 볼 밸브는 정밀한 유량 조절에 적합하지 않습니다. V포트 볼 밸브 또는 제어형 전기 볼 밸브를 사용하는 것이 좋습니다.(2) 모래, 자갈 또는 고농도의 부유 고형물이 포함된 물 입자 막힘이나 밀봉 표면 손상을 방지하기 위해 Y형 스트레이너를 설치해야 합니다.(3) 고온 온수 시스템 고온 볼 밸브는 씰의 노화 및 변형을 방지하기 위해 금속 씰링 구조를 갖는 것을 선택해야 합니다. 3. 주요 선정 기준수계에서 볼 밸브의 안정적인 작동을 보장하려면 다음 선택 매개변수에 특별히 주의해야 합니다. 매개변수 �