Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN ISO 4126-4:2013
• Năm ban hành / Publication date: 2013
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Safety devices for protection against excessive pressure - Part 4: Pilot-operated safety valves (ISO 4126-4:2013)
• Phạm vi áp dụng / Scope of standard: This part of ISO 4126 specifies general requirements for pilot operated safety valves, irrespective of the fluid for which they are designed. In all cases, the operation is carried out by the fluid in the system to be protected. It is applicable to pilot operated safety valves having a valve flow diameter of 4 mm and above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature. This is a product standard and it is not concerned with applications of pilot operated safety valves.