呼吸阀-使用说明书8110

8110系列呼吸阀

安装、操作、维护和储存说明书

Installation, Operation, Maintenance

and Storage Manuals of

Series 8110 Pressure/Vacuum Relief Valve

1简介Introduction

8110系列呼吸阀是一种安装于储罐顶部开放管口处的安全装置，其主要功能是防止储罐破裂或向内爆炸。当介质注入储罐导致压力升高或剧烈的热量转换造成蒸汽压力变化时，未安装有排放装置的储罐将会破裂；当储罐中的介质被抽出或热量转换时，储罐将会向内爆炸；当储罐内介质液面降低，使得气体空间的压力低于大气压时，必须通过排放装置来缓解。简言之，储罐必须通过“呼吸”来消除破裂和向内爆炸的可能。

Series 8110 pressure/vacuum relief valve is a protection device mounted on a nozzle opening on the top of a fixed roof atmospheric storage tank. Its primary purpose is to protect the tank against rupturing or imploding. Without an opening or a controlled opening, a fixed roof atmospheric tank would rupture under increasing pressure caused by pumping liquid into the tank or as a result of vapor pressure changes caused by severe thermal changes. Imploding, or the collapsing of a tank, occurs during the pumping out procedure or thermal changes. As the liquid level lowers, the vapor space pressure is reduced to below atmospheric pressure. This vacuum condition must be alleviated through a controlled opening on the tank. In short, the tank needs to breathe in order to eliminate the possibility of rupturing or imploding. 阻火器的功能是阻止火焰在气体管道系统内的传播以保护储存有易燃性介质的低压储罐。它可以通过阻止外部热量和火焰的传播来保护罐内低闪点的介质，从而提高罐的防火性能和安全性能。通常情况下，将出口通大气的呼吸阀安装于阻火器顶部。

A flame arrester is designed to inhibit flame propagation in gas piping systems and to protect low pressure tanks containing flammable liquids. They protect low flash point liquids from externally caused sources of heat and ignition, providing increased fire protection and safety. A majority of the time, a “vent to atmosphere” pressure/vacuum valve is installed on top of the flame arrester.

8110系列呼吸阀是依据API 2000进行设计、装配和试验的。

According to API 2000 code, series 8110 pressure/vacuum relief valve are designed, manufactured and tested.

2 安装指南Installation Instructions

2.1 8110系列呼吸阀应安装在储罐顶部的开放管口处。

Series 8110 pressure/vacuum relief valve should be installed in the opening nozzle of the top roof of tank.

2.2 8110系列呼吸阀的开启压力是依靠重力式或弹簧式阀盘实现的，所以应将其垂直安

图2: 起吊装置

FIGURE 2: LIFTING SET

2.4 检查及安装步骤如下：

The following guidelines should be observed at installation:

2.4.1拆下法兰保护盖和其它包装材料。

Remove any flange protectors and discard all packing material.

2.4.2 检查储罐法兰密封面，应清洁平滑，不允许有任何划痕、腐蚀。

Inspect the gasket seating surface of the tank nozzle flange. It must be clean, free of scratches, corrosion, tool marks, and flat.

2.4.3 确定垫片材质满足工作条件。

Inspect the gasket; make sure that the material is suitable for the application.

2.4.4 所有的螺栓和螺母均适当润滑。

Lubricate all studs and nuts with an appropriate thread lubricant.

2.4.5将垫片放置于法兰密封面上。

Center the gasket within the bolt circle.

2.4.6将阀门放置在储罐管口上，装上螺栓，并用手带紧螺母。

Set the valve carefully on the nozzle. Install the studs and tighten nuts hand tight.

2.4.7确认阀门法兰未被破坏，且垫片被均匀地压缩后，用扳手将螺母交替均匀地拧紧。 Make sure that the flanges are not distorted and that the gasket is evenly compressed. Screw down the nuts and check that no further nut rotation.

3操作指南Operating Instructions

在加载或卸载的过程中，当储罐压力超过设定压力时，呼吸阀将自动开启，防止储罐膨胀或收缩。

When the tank is loading or unloading phenomena and the pressure is above the setting, the valve will operate automatically to protect the storage tank from inflation and deflation. 4维修指南Maintenance Instructions

4.1在呼吸阀投入使用6个月后，应对呼吸阀阀盘和阻火器阻火元件进行一次检查。此后，应定期对呼吸阀进行检查和清理。检查和维修的周期主要取决于使用介质的类型、加载/卸载的频率、操作条件和使用过程中积累的经验。阻火芯应至少每年检查一次；在出现压将异常和出现火焰时，应将阻火器立即拆下进行检查或更换。

It is necessary to check the pressure and vacuum disc and the element of flame arrester in the first 6 months after operation. Thereafter, it need to check-up and cleaning them at regular

intervals. Frequency of inspection and maintenance depend on the liquid type, the frequency of loading/unloading, the operation condition and experience gained in each application. It is recommended that the flame arrester be removed for inspection of the element at least once per year or at the time of excessive pressure drop is encountered at a known flow rate or a flame front is detected.

4.2维修安全注意事项

The safety rules of the maintenance work

4.2.1进行维修工作前，应将储罐内的压力排空。

For the maintenance work of the installed storage tank, it is necessary to keep the inside of the tank depressurized and gas freed before the work.

4.2.2进行维修工作前，应采取必要的防护措施，以避免遭受储罐中有毒性和易燃性介质的侵害。

For the maintenance work, it is necessary to take the preventive measures against the toxicity and inflammability of the liquid in the tank.

5 存储条件Storage Conditions

金属制呼吸阀，不适于暴露在室外，应储存于室内整洁、通风干燥的环境中。

Pressure/vacuum relief valve as metal products are sensitive to exposed condition. So they should be stored indoors, where is clean and dry.

6特殊说明和专用工具Special Instructions and Tools

无。None.

7备件清单Spares List

无。None.