For various types of valve products, conventional water pressure and air pressure tests cannot determine, and more scientific methods and precision instruments are needed to detect small external leaks. This microwave leakage to the external environment is called micro leakage. Valves that meet the requirements for micro leakage have been widely used abroad, and with the construction of projects by foreign companies in China, some valves for toxic, flammable or explosive media have become micro leakage valves.

Introduction to ISO15848 standard:

ISO 15848-1-2015 Industrial valves -Measurement,test and qualification procedures for fugitive emissions-Part 1:Classification system and qualification procedures for type testing of valves

Industrial valves - Measurement, testing, and identification procedures for leakage of volatile media - Part 1: Classification system and type testing identification procedures for valves

ISO 15848-2-2015 Industrial valves -Measurement,test and qualification procedures for fugitive emissions-Part 2:Production acceptance test of valves

Industrial valves - Measurement, testing and identification procedures for leakage of volatile media - Part 2: Product acceptance tests for valves

Key points of ISO15848 micro leakage valve:

1. The castings of the valve can meet the requirements of ammonia gas testing. Due to the small molecular weight of ammonia and its easy permeability, the quality of the castings is crucial;

2. The sealing between the valve body and the valve cover is often gasket sealing or tail static sealing, which is relatively easy to meet the leakage requirements;

3. The sealing at the valve stem often adopts graphite packing structure. Due to the dynamic sealing at the valve stem, graphite particles are easily carried out from the packing during the movement of the valve stem. These control measures are key;

Zeus Zhonglue Certification Valve Related Certification Services:

1. Valve PED 2014/68/EU, CE-PED certification

2. Explosion proof CE-ATEX certification for valves, actuators, etc

3. SIL functional safety certification for valves, actuators, etc

4. Valve API 6A, 6D certification

5. Valve API 607,6FA fire resistance test

6. Valve API 622624 type test

For specific questions, please consult Zealous Cert Central Certification

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