Model 537
ASME Section IV, Low Pressure Hot Water Boilers, 'HV', National Board Certified

Model Descriptions 
Model 537: Bronze for 3/4-inch and 1-inch models, Cast iron for 1-1/2-inch and 2-inch models.

Pressure and Temperature Limits 
15 to 160 psig -20°F to 250°F

Applications 
Hot water boiler, heat exchangers and generators.

Options 
No Options Available

Features and Benefits

• Extra heavy construction provides long life.
• Top guided disc assembly incorporates resilient seal in seating area.
• An isolating diaphragm protects working parts from corrosion caused by discharged liquid
• Pivot between disc and spring corrects for misalignment and compensates for spring side thrust.
• These safety relief valves serve the dual purpose of relieving (1) over pressure created by thermal expansion under normal 'on and off' firing conditions and (2) over pressure in the form of water or steam created in over-firing due to failure of electrical or other controls. 

537型：

经过“HV”国家委员会认证的适用于ASME第四部分，低压热水锅炉安全阀

型号描述：
0.75英寸和1英寸的铜质型号，1.5英寸和2英寸的铸铁型号

压力和温度范围：

15 to 160 psig

-20°F to 250°F

应用：

热水锅炉、热交换器和发电机

选项：

无

特色&优势：

额外的重型结构可提供更长的使用寿命

顶部引导阀瓣在密封区域集中合并了弹力密封装置

隔离膜片能保护工作部件免受由于液体排放而造成的腐蚀

位于阀瓣和弹簧之间的枢轴可修正由于弹簧侧推力造成的偏差和平衡

这些安全阀具有着双重作用：

（1）    缓解了由热膨胀所造成的压力，而这些热膨胀是在不断的正常燃烧条件下产生。

（2）    缓解了以水或蒸汽形态存在所形成的压力，而这水或蒸汽形态的形成是由于电子或其他操控系统的失败所导致的过度燃烧。