性能特点：

          1、整定压力偏差≤±3%
          2、超过压力≤10%
          3、启闭压差≤15%
          4、密封性能：符合API 527标准的规定的密封要求

结构特点：
1、结构紧凑，造型美观，铸件大都采用精密铸造，表面光洁。        
2、阀座和阀体可分，使阀座更易研磨成镜面保证密封，且便利装拆维修。
3、合理设计的反冲盘和调节圈相匹配，调整方便，不仅使安全阀能迅速地全开，且能及时地回座，从而得到理想的启闭压差。
4、阀座和阀瓣密封面都堆焊了昂贵的钴基硬质合金，提高了密封，耐磨和耐蚀性，延长了使用寿命。
5、背压平衡式安全阀采用军品波纹管制作，能有效地消除背压对起跳压力的影响，还能对有蚀有毒介质起严密的隔作用，防止介质腐蚀阀门内件和污染环境。
6、对关键零件弹簧作二次24小时恒温处理，确保其在工作状态中刚度稳定，起跳动正确。
7、对阀体、阀座和其它受压件都作严格的耐压试验，确保了使用时的安全、可靠。
Performance: 1) Tolerance of set pressure: ≤±3% 2) Overpressure: ≤10% 3) Blowdown: ≤15% 4) Permeability: in compliance with API527 standards for air permeability Structure characteristics: 1) Compact structure, beautiful outer appearance, precision castings, and smooth surface 2) The valve’s seat and body are separable, which enables the valve seat to be polished to guarantee air permeability and be easy to disassemble for repair and maintenance 3) The reasonable designed pair of disc holder and adjusting ring is convenient for adjustment. They can fully open the security valve in a short period and meanwhile make a timely return, which generates ideal open and close pressure difference 4) The sealing surfaces of the valve seat and valve clacks are welded with diamond-based rigid alloys, which will promote the valve’s air permeability, anti-wear and anti-corrosion, and prolong its service life 5) Balanced back pressure relief valve is made of bellows for military use, which can eliminate the affect of back pressure on set pressure and quarantine the toxicant medium to prevent the contamination inside the valve 6) Twice 24-hour constant temperature treatment to key parts and spring will ensure their stable rigidity and normal opening of the valve 7) Compression test to valve, valve seat and other pressure parts will ensure safety and reliability during later application