Abstract
Valve life cycle testing, Kwaziwa ngokuba yinyhweba okanye uvavanyo lomjikelo, luvavanyo olubalulekileyo lwe-valve yexesha elide, especially crucial for frequently actuated brass valves. It validates the robustness of the valve’s design, izixhobo, and manufacturing processes by simulating the thousands, or even tens of thousands, of opening and closing operations it may experience during its service life.

1. Purpose of Brass Valve Life Cycle Testing
Life cycle testing is not a mandatory production test for every valve but is rather a Type Test, typically conducted in the following scenarios:

• Design Validation: During the new product development phase, life cycle testing is used to verify the soundness of the structural design and material selection. It specifically assesses dynamic components such as the stem, seals, and actuation mechanism to ensure the valve can meet its expected service life.
• Reliability Assessment & Lifespan Prediction: To provide a reliability commitment for the product based on experimental data. Using real data from cycle tests, manufacturers can determine a theoretical service life. A service life factor, α (Ngokwesiqhelo 0.8-0.9), is then applied based on the actual application scenario to calculate a guaranteed minimum lifespan. Umzekelo, if lab testing shows 10,000 failure-free cycles, a manufacturer might establish a shorter baseline for warranty purposes. The guaranteed minimum lifespan could be calculated as: 5,000 cycles * a service factor α (I-E.G., 0.8) = 4,000 cycles. The manufacturer would then commit to a guaranteed “4,000 failure-free actuations.”
• Wear Performance Evaluation of Critical Components: After the test, the valve can be disassembled for a visual inspection of key friction pairs, such as the seat rings, stem packing, and the surface of the ball/disc. Oku kuvumela uvavanyo lokunxiba, ukwenziwa kwengxaki, okanye ukwaluphala, Enceda ekuboniseni i-velic yenkonzo ye-valve. Njengokuba, Ngokuzithoba i-valve emva 500, 1000, 1500, 2000, 2500, kwaye 3000 Imijikelezo ngokulandelelana ukulinganisa inqanaba lokupakisha, ijika elibonisa ubudlelwane phakathi kwemijikelezo yoonobumba kunye nokunxiba kunokucekiswa. Oku kuvumela i-propoting kunye nengxengxweni yobomi benkonzo yokupakisha.

2. Imigangatho kunye neemfuno zovavanyo lweVald Valve Logich Boat
Akukho namnye, UMGAQO-NKQUBO WOBUCHULE BOKUFUNDA NGOKUFUNA UKUFUNA IINGXAKI ZOBOMI NGABO.

Iimfuneko zovavanyo azihluka ngokuxhomekeka kwicandelo lesicelo se-valve kunye nohlobo. Imigangatho yamazwe jikelele efana Ngaphakathi 12266-2: “I-valves yemizi-mveliso – Ukuvavanywa kwee-valve zensimbi – Inxenye 2: Iimvavanyo, Inkqubo yovavanyo kunye neendlela zokwamkelwa – Iimfuneko zokuXhasa” kwaye Api 598-2023: “Uvavanyo lweValve kunye novavanyo” only stipulate the test methods but do not mandate specific cycle counts.

3. Brass Valve Test Method and Procedure
Modern valve life cycle testing relies on a highly automated and integrated “Valve Torque, Actuation, Life, and Pressure Test Bench.” The standard procedure is as follows:

• Preparation:
  • Sample Selection: A specified number of samples (Ngokwesiqhelo 3-5) are randomly selected from the same production batch.
  • Baseline Performance Test: Before cycling begins, each sample undergoes a complete performance test to establish a “zero-point” baseline. This includes visual and dimensional checks, shell and seat tests (per API 598 or EN 12266-1), and an initial operating torque test.
• Test Rig Setup & UMGAQO-NKQUBO OMPILO:
  • Multi-Functional Integrated Platform: The test is conducted on a platform that integrates torque, life cycle, uxinzelelo, and sealing tests. First, the valve under test is mounted on a specialized fixture, kunye nemigca yemithombo yeendaba kunye ne-torque ye-torquend ephezulu iqhagamshelwe.
  • Uxinzelelo lokulayisha: Impompo yoxinzelelo oluphezulu okanye umthombo womoya usebenzisa uxinzelelo lovavanyo lwe-valve (Imithombo yeendaba inokuba ngamanzi, umoya, ioyile, njl., ngoxinzelelo oluqhelekileyo lwe 0-10 Mpa, ngokuqinisekileyo). Ngeemfuno ezithile, I-rig inokudibanisa inkqubo eshushu nebandayo yokujikeleza kwamanzi.
  • Ulawulo oluzenzekelayo: Yonke inkqubo isebenza ngokupheleleyo kwaye ilawulwa yinkqubo ye-plc okanye yekhompyuter. Umqhubi umisela iiparamitha, njengenani lemijikelezo (ixhomekeke ku 100,000+), isantya sokubonisa (I-E.G., 1-10 Imijikelezo / umzuzu), kunye noxinzelelo lovavanyo, Nge-intensi yokulawula.
• Ukubulawa & Ukubeka iliso okwexeshana:
  • Ukusebenza ngebhayisikile ngokuzenzekelayo: Waqala, Umbane okanye i-Pneumatic Actuator iqhuba i-valve “ivulekile ngokupheleleyo → esondeleyo” Imijikelezo kwixabiso lemigangatho (Ngokwesiqhelo 4-10 Imijikelezo / umzuzu).
  • Ukufunyanwa kwedatha yexesha lokwenyani: This is a key advantage of modern testing. During every single cycle, the system:
    • Measures Torque in Real-Time: A high-precision torque sensor (accuracy up to ±0.5%) records and plots a complete torque curve.
    • Monitors Pressure: A pressure sensor ensures the test pressure remains stable at the set point.
    • Counts Cycles Automatically: The system automatically logs the number of valid cycles.
    • Detects Sealing Performance: The system can automatically check for internal and external leakage at predetermined cycle intervals or after each closure.
  • Safety Protections: The test bench is equipped with multiple safety features, including over-pressure, over-torque, and emergency stop functions, ensuring a safe process and automatically halting the test in case of valve seizure or severe leakage.
• Completion and Final Evaluation:
  • Data Output: The test automatically stops upon reaching the preset number of cycles. The system generates a detailed test report containing all process data, including torque values for each cycle, pressure fluctuations, total cycles, and leakage information.
  • Final Performance Test: The baseline tests from the preparation stage are repeated, and the results are compared with the initial data.
  • Disassembly and Inspection: The valve is completely disassembled for a thorough visual inspection of all internal parts, particularly:
    • Ball/Disc Surface: for scratches, plating delamination, or pitting.
    • Seat Rings (PTFE/EPDM, njl.): for wear, compression set, ukwenziwa kwengxaki, okanye ukwaluphala.
    • Stem and Stem Seals (O-rings/Packing): for wear, twisting, or fracture.

4. Key Evaluation Metrics & Failure Criteria
The pass/fail determination for a life cycle test is based on the following key points:

• Ukusebenza kokutywina: This is the most critical criterion. During or after the test, both external leakage (from the body, bonnet, or stem) and internal leakage (through the seat) must remain within the limits specified by the standard. Any leakage exceeding these limits constitutes a failure.
• Operating Torque: With real-time data acquisition, the evaluation is more sophisticated. It involves not just comparing initial and final torque, but also analyzing the torque trend over the entire test duration. Sudden spikes in torque or a continuous and significant increase (I-E.G., exceeding the initial value by 50%-100%) indicates severe internal wear, galling, or seal damage and can be judged as a failure.
• Structural Integrity: Throughout the test, no component of the valve (such as the stem, handle, or stop pins) shall fracture, permanently deform, or become dislodged.
• Internal Wear Condition: Emva kokuhlonitshwa kunye nokuhlolwa, Ukuba izinto ezibalulekileyo zibonisa ukuba inxitywe kakhulu inokukhokelela ekungaphumleni, I-valve isenokuthathwa njengesilelo nokuba incinci idlula uvavanyo lokugqibela lwetywina.

I-BMAG BRASS: Iqinisekisiwe ngovavanyo olungqongqo

Yindibaniselwano yezi zinto zifunwayo-ukuthembeka kwempahla, Amandla okwakha, kunye nokuqina kwexesha elide - okuphakamisa icandelo elisezantsi kwimveliso ethembekileyo ethembekileyo.

Kwi-BMAG, Esi sithandi sobulumko esingqongqo asisiyongxaki nje; Kuyinto ephambili kwinkqubo yethu yophuhliso. Yonke i-valve ye-valve kwaye yaphuhliswa phantsi kwe-BMAG Brand iqinisekisiwe kwi-Advanced, Uvavanyo lwe-plc lobomi. Oku kusenza ukuba sikwazi ukuthoba iimveliso zethu kuvavanyo oluphezulu ohlala lidlula kwimilinganiselo yeshishini, Konke ngelixa ukufaka i-putise, real-time performance data.

This unwavering commitment ensures that our products deliver unparalleled reliability, consistent performance, and a long service life. If you require robust brass valves engineered for endurance and proven through the industry’s most advanced testing methodologies, Siyakumema ukuba ube connect with our team to discuss your specific requirements.