在壓力容器、鍋爐和管道系統(tǒng)中，超壓是引發(fā)爆炸事故的頭號(hào)原因。安全閥就是這道“非常后防線”——當(dāng)系統(tǒng)壓力超過(guò)設(shè)定值時(shí)，安全閥自動(dòng)開啟泄壓；壓力恢復(fù)正常后自動(dòng)關(guān)閉，將事故消滅在萌芽狀態(tài)。良工閥門集團(tuán)的安全閥產(chǎn)品廣泛應(yīng)用于石油、化工、電力、核電等領(lǐng)域。

Overpressure is the leading cause of explosion accidents in pressure vessels, boilers, and piping systems. The safety valve is the "last line of defense" - when the system pressure exceeds the set value, the safety valve automatically opens to release pressure; After the pressure returns to normal, it will automatically shut down, eliminating the accident in its early stages. Lianggong Valve Group's safety valve products are widely used in fields such as petroleum, chemical, power, and nuclear power.

一、安全閥的工作原理與分類

1、 Working principle and classification of safety valves

安全閥是一種自動(dòng)閥門，其工作原理是利用彈簧力或重錘力與介質(zhì)壓力之間的平衡來(lái)控制閥門的開啟和關(guān)閉。當(dāng)系統(tǒng)壓力低于整定壓力時(shí)，閥瓣在彈簧力作用下緊貼閥座，保持密封。當(dāng)系統(tǒng)壓力超過(guò)整定壓力時(shí)，介質(zhì)壓力克服彈簧力，閥瓣被推開，介質(zhì)排出泄壓。壓力降至回座壓力后，閥瓣自動(dòng)復(fù)位。

A safety valve is an automatic valve that works by using the balance between spring force or heavy hammer force and medium pressure to control the opening and closing of the valve. When the system pressure is lower than the set pressure, the valve disc tightly adheres to the valve seat under the action of spring force, maintaining sealing. When the system pressure exceeds the set pressure, the medium pressure overcomes the spring force, the valve disc is pushed open, and the medium is discharged to relieve pressure. After the pressure drops to the reseating pressure, the valve disc automatically resets.

良工安全閥的主要類型：

The main types of Lianggong safety valves are:

彈簧式安全閥（A41W-16P） ——利用彈簧力控制開啟壓力，結(jié)構(gòu)簡(jiǎn)單、靈敏度高。

Spring type safety valve (A41W-16P) - uses spring force to control the opening pressure, with a simple structure and high sensitivity.

先導(dǎo)式安全閥——主閥由導(dǎo)閥控制，適用于大口徑、高壓力工況。

Pilot operated safety valve - The main valve is controlled by a pilot valve and is suitable for large-diameter, high-pressure working conditions.

全啟式安全閥——閥瓣開啟高度大，排放能力強(qiáng)。

Full opening safety valve - the valve disc has a large opening height and strong discharge capacity.

微啟式安全閥——閥瓣開啟高度小，適用于液體介質(zhì)。

Micro opening safety valve - with a small valve disc opening height, suitable for liquid media.

二、良工安全閥的技術(shù)參數(shù)詳解

2、 Detailed explanation of technical parameters of Lianggong safety valve

A41W-16P DN100×100——彈簧式安全閥，公稱壓力1.6MPa，材質(zhì)304不銹鋼，進(jìn)出口口徑均為100mm。整定壓力（起跳壓力）為1.1MPa，即在1.1MPa壓力下閥門自動(dòng)開啟泄壓。

A41W-16P DN100 × 100- Spring type safety valve, with a nominal pressure of 1.6MPa, made of 304 stainless steel, and an inlet and outlet diameter of 100mm. The set pressure (jump pressure) is 1.1MPa, which means that the valve will automatically open and release pressure under 1.1MPa pressure.

良工安全閥的材質(zhì)選擇十分豐富，從碳鋼、不銹鋼（304、316）到特種合金均有覆蓋。工作壓力覆蓋從低壓到高壓的廣闊范圍。連接方式包括法蘭連接、螺紋連接、焊接連接等。

The material selection for Lianggong safety valves is very diverse, covering carbon steel, stainless steel (304, 316), and special alloys. The work pressure covers a wide range from low pressure to high pressure. The connection methods include flange connection, threaded connection, welded connection, etc.

三、安全閥選型的核心要點(diǎn)

3、 The core points of selecting safety valves

1. 整定壓力——安全閥的開啟壓力，建議低于容器或管道的設(shè)計(jì)壓力。

1. Set pressure - The opening pressure of the safety valve must be lower than the design pressure of the container or pipeline.

2. 排放能力——安全閥在開啟狀態(tài)下單位時(shí)間內(nèi)能排放的介質(zhì)流量，建議大于系統(tǒng)可能產(chǎn)生的非常大超壓量。

2. Discharge capacity - The flow rate of the medium that can be discharged per unit time when the safety valve is in the open state must be greater than the maximum overpressure that the system may generate.

3. 介質(zhì)特性——?dú)怏w、液體、蒸汽對(duì)安全閥的結(jié)構(gòu)和材質(zhì)有不同要求。

3. Medium characteristics - gases, liquids, and vapors have different requirements for the structure and material of safety valves.

4. 背壓影響——安全閥出口側(cè)的壓力會(huì)影響開啟壓力和排放能力。

4. Back pressure effect - The pressure on the outlet side of the safety valve will affect the opening pressure and discharge capacity.

5. 材質(zhì)選擇——腐蝕性介質(zhì)需選用不銹鋼或特種合金。

5. Material selection - Stainless steel or special alloys should be used for corrosive media.

四、安全閥的安裝與定期檢驗(yàn)

4、 Installation and Regular Inspection of Safety Valves

安全閥應(yīng)垂直安裝，且不得隨意拆卸。進(jìn)口管道上不得裝設(shè)明顯閥門。安全閥建議定期進(jìn)行校驗(yàn)，包括整定壓力校驗(yàn)和密封性試驗(yàn)。良工安全閥廣泛應(yīng)用于電站、核電、石油、化工等領(lǐng)域，產(chǎn)品質(zhì)量可靠、性能穩(wěn)定。

The safety valve should be installed vertically and should not be disassembled arbitrarily. No valves shall be installed on the imported pipeline. Safety valves must be regularly calibrated, including set pressure calibration and sealing tests. Lianggong safety valves are widely used in power plants, nuclear power, petroleum, chemical and other fields, with reliable product quality and stable performance.

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