泄压人孔是迅速泄压设备，其技能功能、首要零部件资料与呼吸人孔一样。 
The pressure relief manhole is a rapid pressure relief equipment, and its skills, functions and primary components are the same as those of the breathing manholes.

泄压人孔是是装置在石油化工等设备和储罐上的安全应急通风设备，一般与罐顶上装置的呼吸阀配套运用，坚持罐内的正常压力，既能防止因意外因素形成罐内急剧超压或真空时，损坏储罐而发作的事端；
The pressure relief manhole is safety emergency ventilation equipment device in petrochemical equipment and storage tanks, and the top of the tank for the breathing valve supporting the use of, adhere to the normal pressure tank, which can prevent the formation of accidental factors of tank sharp overpressure or vacuum, damaged tanks and attack incidents;

泄压人孔具有定压排放、定压吸入、式闭灵敏、构造紧凑、密封功能好、安全可靠等长处。
The pressure relief manhole has many advantages, such as constant pressure discharge, constant pressure suction, closed type sensitivity, compact structure, good sealing function, safety and reliability.

参数特性：

Parameter characteristics:

壳体资料：碳钢、不锈钢；
Shell material: carbon steel, stainless steel;

密封件资料：耐油石棉、聚四***乙烯；

Sealing material: oil resistant asbestos, ptfe;

环境温度：-30C——+60C；

Ambient temperature: -30C - +60C；

操作压力：-392pa~ +1961Pa(-40mmH2O~+200mmH2O)；

Operating pressure: -392pa~ +1961Pa (-40mmH2O~+200mmH2O);

泄压人孔“材质” Pressure relief manhole "material"：

备注：连接标准：HG 、GB、 ANSI、 JIS、 DIN等等.

Standard Connection：HG、GB、ANSI、JIS、DIN、ect.

操作压力：+1961pa （+200mmH2O）

Operating Pressure：+1961pa （+200mmH2O）

泄压人孔“尺寸表” Dimension table for pressure relief manhole"：

泄压人孔“订购须知” "Pressure relief manholes" order notes"：

1、订货时请注明产品尺寸、操作压力及材质。

Please give clear indication of Dimension，operating pressure and material.

2、当需要其他标准法兰、材质或操作压力时请在订货时注明。

Please give clear indication of flange,material and operating pressure if you need other standard.