Langir: Your Reputable Emergency Stop Push Button Supplier from China

Langir is your top choice for an emergency stop push button supplier from China.

We provide customers with world-class quality emergency stop push buttons and are committed to ensuring their safety.

Our emergency stop push buttons are specifically developed to be not only robust but also highly reliable whenever an emergency arises.

Besides stopping machinery, you can also use our emergency stop push button on a bus or train to signal the driver to stop.

Langir's emergency stop push buttons comply with safety standards that are important to you, our customers.

We always prioritize your safety so you can be worry-free and focus on other important matters.

Langir's emergency stop push buttons undergo strict quality inspections and certifications to ensure they meet your expectations and protect your safety.

When you order from us, your emergency stop push button will be promptly shipped from our facility and delivered straight to your doorstep within days.

Our friendly operators are always on standby to answer your inquiries and take your orders.

You can also request a free quote now or send an inquiry and receive an immediate response.

Emergency Stop Push Button — FAQ Guide

In this emergency stop push button FAQ guide, you will learn various aspects of emergency stop push buttons.

You will find detailed definitions, history, different applications, types, and other information about emergency stop push buttons that you may not know until reading this guide.

Furthermore, you will learn interesting facts, such as why the button is bright red instead of other colors, or why it typically features a mushroom head design.

Before making a purchase, read this guide to gain better knowledge and select the best emergency stop push button for your application.

1. What is an emergency stop push button?

Different types of the emergency stop push button

An emergency stop push button is a safety mechanism, device, or switch that is used to manually turn off or shut down a machine in times of an emergency or when the machine can’t be shut down in a normal manner for some reason.

For instance, a machine emergency stop button.

It is also used for vehicles and transportation to signal a stop to the driver or lay down emergency breaks.

The term emergency is derived from the word “emergent” which means a situation that is about to happen or developing at the moment.

The emergency stop push button is made with this intention, to stop a potentially harmful accident to happen.

An emergency stop push button is also called a kill switch, e-stop, E stop switch, emergency switch, emergency button, emergency stop, emergency stop button, stop emergency, switch emergency stop, emergency stop switch, stop switch, button emergency stop, emergency stopper, emergency stop pushbutton, emergency stop button switch, double pole emergency stop button, or emergency stop push button switch.

Unlike when you normally turn off a machine where it sequentially and safely shuts down all of its systems and operation in the usual manner, the emergency stop push button shuts them all down immediately and sometimes to the point that it can sometimes cause damage to the machine.

The emergency stop push button is designed to abort the operation as soon as possible with just a push of a button that even a panicking operator or even any untrained personnel can execute easily when the emergency arises.

Fun Fact: The emergency stop push button is not a safeguarding device

The emergency stop push button is considered a safety device since the early times, however, the ISO and IEC international standards clarify they are technically not.

They clarified that the main intention of the emergency stop push button is to stop existing damage to a machine or a person and it should be initiated with a single human action.

The notion of a safeguarding device would mean that if danger is about to happen, the machine will automatically stop which the emergency stop push button is not.

Since it is a mechanical device, it needs a manual physical intervention therefore someone needs to press it so it can be activated.

You can also see it this way, the safeguarding device is proactive, while the emergency stop push button is reactive.

An example of emergency stop push button

2. What is the history behind the development of the emergency stop push button?

During the era of the industrial revolution, between the 1820s up to 1870s, the power supply of the types of machinery is coming from large central power sources such as steam engines, water wheels, and large electric motors that also supply the power to the whole factory or factories.

Therefore, stopping a machine when something went wrong means stopping the power supply of the whole factory as well.

The machine builders realize this problem and decided to find a way to quickly stop the machine operation when needed.

One of the early inventions of a stop device is the belt shifting device which has a drive belt that can be shifted from the idle state to the driving state then reverse state to stop the machine.

The emergency stop push button was developed from these origins.

Belt shifting device illustration

3. Why is it cheaper and safer to have an emergency stop push button?

In the 1900s, many industrial accidents resulted in financial loss, caused human injuries, and even claimed the lives of thousands in the US alone.

A study published in 1916, stated that industries, in general, suffered a financial loss amounting to $500 million, serious human injuries and dismemberments averaging about 350,000, and minor accidents which caused loss of time costing more than $2 million on a year to year basis.

Basing on these numbers, you can conclude that it is perhaps cheaper to add an emergency stop push button to the machines compared to the amount spent for the hospitalization of the injured personnel and other costs.

The emergency stop switch price or emergency stop button price nowadays is anywhere between $7 up to $20.

But unfortunately, the industry sectors during those times prefer to prioritize the economical aspect of the business with less focus on the safety of their people.

And because of this, it always takes years of more human casualties and outbursts of strong public opinion before safety standards and government legislation are implemented.

This has become a cycle over the years and lawmakers always wait until public indignation is happening before taking action.

But eventually, the growing government intrusion is becoming a problem with the industrial sector.

Because of this, the industries formed committees and organizations intending to propose safety standards voluntarily.

Then in 1969, the American National Standards Institute, or ANSI, developed the safety code standards applicable to different industrial operations.

However, most of these standards do not provide specific information about the emergency stop push button and other emergency stop devices as they are always written in performance styled language.

This allows the manufacturers to develop their own emergency stop devices but it became a problem for machine operators who will work in a different factory or will be assigned to a different brand of machine which would have a different design and controls.

This is because the emergency stop devices between different types of machines are most likely different from each other which can cause confusion to the operator and will cause a delay in stopping the machine if an emergency takes place.

This is one of the reasons ANSI developing consensus standards about emergency stop push buttons when it comes to its type, design, or its placement on the machine in the succeeding years.

There were many revisions and clarifications on these consensuses on safety standards over the years but these are the guidelines that helped paved the way for emergency stop switch suppliers to develop the emergency stop push button that we know today.

An old emergency stop push button in a factory

4. How does the emergency stop push button mechanism work?

The emergency stop push button is a critical operating component acting as a fail-safe control switch that generally provides safety to the operator and the machine in various emergencies.

An emergency stop push button is generally wired in series within a machine’s control circuit.

If you press the emergency stop push button, it instantly breaks or cuts the circuit and stops the power supply that runs the machine, and immediately shuts the machine down during an emergency.

In instances that the emergency stop push button needs to be released, it sometimes requires an authorized operation that requires pulling, rotating, or even using a key to make sure the safety of the people and machinery and prevent any accidents to occur.

Disassembled parts of the emergency stop push button

5. Is the emergency stop push button NC or NO contact?

Depending on its specific function or application, the emergency stop push button can be normally closed or normally open contact.

But some operators prefer NC or normally closed emergency stop push button and there are a few notable reasons why.

And these are because of the following:

• Shorter operating time

The time that normally closed contact takes from closing to opening is shorter when compared to the time that normally open contact takes from opening to closing.

It may come as a surprise to you, but this is true and the shorter time matter especially during an emergency.

Every second counts, even milliseconds, when there’s an emergency especially when the machine operator is at risk of getting injured, or moreover when lives could be in danger.

Accidents can happen in just seconds, having a normally open contact for an emergency stop push button or normally open emergency stop button may not be the safest choice.

In a split second, it may not be able to stop a machine from causing personnel injury or from damaging the machine itself when its operation goes wrong for some reason.

While having an NC emergency stop push button may save a second from stopping a machine and avoiding all of that to happen.

• Button mechanism perspective

All mechanical push button when pressed, further down to the end, they will bounce back which means that it was not actuated.

If the emergency stop push button is a normally open contact, when it is not pressed, the emergency stop is not in effect because the contacts are open and not closed.

While if the emergency stop push button is a normally closed contact when it is not pressed, the emergency stop is in effect because the contacts are closed.

• Control circuit perspective

An emergency stop push button’s most basic function is to stop any untoward accident to happen to the machine’s operator and the machine itself in the instant that an emergency happens.

如果急停按钮为常开触点，则存在因控制电路出现故障或控制电路线路中急停部分发生故障而导致故障的倾向。.

对机器造成的损坏可能是不可修复的，在最坏的情况下，事故已经发生。.

与常开触点不同，如果急停按钮为常闭触点，通常即使急停部件发生故障，机器也会停止。.

机器损坏相对较小，且事故很可能得以避免。.

输送机操作员

急停按钮是自锁型还是瞬时型？

急停按钮分为自锁型或瞬时型开关。.

这取决于您将其用于何种应用。.

• 自锁型急停按钮

自锁型急停按钮主要用于停止机器运行。.

它有时被称为可锁定急停按钮或自锁型急停开关。.

机器恢复运行前需要进行彻底检查，以确保不会发生进一步损坏或机器问题已得到解决或修复。.

如果急停按钮用于机器操作以外的其他应用，同样适用此安全措施。.

• 瞬时型急停按钮

瞬时型急停按钮通常用于不需要自锁开关功能的应用。.

通常，在这些应用中，恢复机器任务的操作被分配给不同的控制装置或开关，或者机器在突然停止后通常可以安全重启。.

急停按钮有几种类型？

最常见的急停按钮有三种，分别是：

• 推拉式急停按钮——按下按钮停止，需要拉出按钮才能释放并使其恢复正常位置。.
• 旋钮释放式急停按钮——同样按下按钮停止，但需要旋转按钮才能释放并使其恢复正常位置。.
• 钥匙释放式急停按钮——按下按钮停止，只能使用钥匙释放并使其恢复正常位置。.

例如：带钥匙的急停按钮、钥匙式急停按钮、钥匙式急停开关、带钥匙急停装置

其他类型的急停按钮包括：

• 脚踏式和掌触式急停按钮

它们通常具有较大的执行器表面，可通过脚或手触发。.

由于其触发方式，它们通常具有防篡改特性，并设计为可快速响应。.

这些类型适用于恶劣环境。.

• 位置开关

这些开关与急停触发部件相连或连接。.

它们同样具有高可靠性，且通常易于安装。.

旋钮释放式急停按钮

急停按钮用于哪些应用？

由于急停按钮旨在提升安全性，因此可见于各种行业的多种设备、机器或应急系统中。.

急停按钮的一些应用场景包括：

• 机器
• 火车和铁路
• 小船
• 船舶
• 卡车
• 加油站
• 道路车辆
• Elevators
• 自动扶梯
• 健身房
• 游乐设施
• 集成软件的机械装置
• 发电厂
• 军事
• 飞机
• 航天飞机

急停按钮存在于工业、商业和公共设施等各种行业。.

它们必须清晰醒目，便于任何需要使用的人员识别。.

如果一台机器具有多种功能，根据需停止的阶段不同，也可能配备多个急停按钮。.

急停按钮的应用

是否每台机器都需要配备急停按钮？

每台机器是否需要急停按钮取决于您所在的地区。.

不同国家在机器制造方面有各自的标准和法规。.

这些机器需经过一系列风险评估，以确定是否需要急停按钮。.

通常，这些风险评估基于机器或其操作对操作员或相关人员造成的危险等级。.

此外，这些机器的制造商还需确保符合ISO/IEC 38500，这是一套旨在帮助最高层组织理解并遵守在其组织中使用信息技术所涉及的道德、法律和监管义务的指南。.

（ISO）国际标准化组织和（IEC）国际电工委员会提供了这些信息技术有效治理指南。.

这同样适用于各种规模的组织、公共和私营企业、政府实体以及非营利组织。.

符合标准的急停按钮示例

哪些紧急情况可能需要使用急停按钮？

有时，即使机器经过精心设计以确保安全，更现实的情况是假设在某些情况下机器仍需要手动触发急停按钮。.

此项假设同样适用于安装正确并定期接受适当维护的机器。.

此假设的依据在于多种类型的紧急情况均可能发生。.

原因可能涉及电气、机械、环境及人为失误，或上述任何因素的组合。.

此外，机器通常在任何时候都能实现故障安全，但即便是最可靠的机器最终也会发生故障，因为无法保证故障不会导致部件损坏，从而影响机器整体运行或引发其他组件故障。.

机器可能发生短路，导致其部件承受有害的高压；也可能因继电器触点粘连而异常运行；或因弹出电磁阀损坏导致部件卡滞。.

务必检查电压等级，例如240伏急停开关、120伏急停按钮、12伏急停按钮、12伏急停按钮、20安培急停按钮和30安培急停按钮。.

这些仅是工业环境中最常见的机器故障类型。.

以下列举了可能需要使用急停按钮的一些紧急状况：

• 物料错位或存在缺陷
• 电源失控
• 操作员被卷入机器
• 进料中存在异物或多余部件
• 机床刀具破损
• 危险化学品泄漏
• 电气爆炸
• 进料堵塞
• 火灾突发
• 机器部件卡死
• 部件松动
• 机器失衡

其他紧急情况可能未包含在此列表中，但其含义已明确。.

无论机器集成何种现代或自动控制系统，急停按钮仍是必需的，且应尽可能采用防爆型急停按钮。.

急停按钮也是操作员职能的重要组成部分。.

机器设计和操作员培训中还应包含急停按钮实施的应急预案，以确保在实际事故发生时能有效使用。.

经过培训的车床操作员

11. 为何急停按钮采用蘑菇头设计？

根据行业安全要求和IEC标准，急停按钮必须采用蘑菇头设计。.

这确保了急停按钮便于单手操作，且安全可靠。.

蘑菇头是一种独特设计，被普遍认定为急停按钮的标志。.

该设计在北美地区占主导地位，而欧洲则广泛采用锥形设计。.

蘑菇头通常具有光滑表面，即使突然用力按压也不会造成伤害。.

蘑菇头急停按钮

12. 为何急停按钮采用亮红色按钮与黄色背景？

急停按钮始终采用红色按钮和黄色背景（无论是底座还是标牌，如“急停按钮”、“紧急关闭”、“紧急断电”、“紧急按压”），以此区别于所有其他普通开关。.

这符合以下国际标准：

• ISO 13850
• IEC 60947-5（开关设备和控制设备）
• IEC 60204-1（机械电气设备）
• NFPA 79（工业机械电气布线标准之国家电气规范章节）

这些标准要求急停按钮应具有亮红色按钮和黄色背景。.

颜色编码始终是正确识别控制装置的关键因素，红色作为象征危险或停止的颜色符号，已沿用数百年至今。.

红色即使在低照度条件下，也能在远处凸显于其他颜色之上。.

红色与黄色背景结合更具视觉辨识度，因此能有效缩短寻找时间。.

这种颜色组合引人注目，使任何人都能更容易识别红色急停按钮，即使是相对于机器整体、整个控制系统或周围环境其他颜色的小型急停按钮。.

甚至还有带照明的急停按钮，以便在黑暗中也能轻松识别。.

其他类型采用发光材料制成，可在黑暗中发光；另一些则配有专用应急灯，专门照亮急停按钮的位置。.

带照明急停按钮

13. 关于急停按钮，ANSI有哪些通用实用建议？

ANSI针对各类行业制定了不同的安全标准共识。.

以下是关于急停按钮使用的一些通用实用建议：

• 总停按钮或控制装置必须安装在每个控制面板的相同位置，如急停按钮面板安装座。.
• 红色控制装置应始终与急停按钮配合使用，其他控制装置不得使用红色。.
• 触发急停按钮应立即停止危险运动，并使机器保持安全状态。.
• 重启机器时应执行独立或特定操作。.
• 急停按钮应供所有操作员使用，设置在每个操作员工位或指定作业的危险区域。.
• 建议在每个操作员的工位及其指定作业的每个危险位置都配备急停按钮。.
• 若机器部件在触发急停按钮后可能惯性滑行，则应集成制动系统。.
• 同类机器的急停按钮应标准化，包括其配置、机器上的位置、功能和颜色编码。.
• 必须在日常维护期间定期测试急停按钮，确保其正常工作。.
• 所有急停按钮应进行尺寸和形状编码、贴标，且不得内嵌安装。.

ANSI标识

14. 急停按钮的标准使用方法是什么？

急停按钮还需遵循ISO 13850规定的使用标准。.

根据该标准，当机器无法正常停止，或机器的正常停止功能故障、失效、无法触及或在紧急情况下使用过慢时，必须通过单一人工操作触发或启动急停按钮。.

以下列表列出了ISO 13850或欧洲标准EN 418中规定的一些要求：

• 必须在常闭触点上安装直接断开机构。.
• 具备自保持功能。.
• 执行器应采用蘑菇头设计或等效设计。.
• 按钮必须为红色，背景为黄色。.

除上述列出的要求外，每一项都必须有相应的对策。.

15. 能否避免紧急停止按钮的意外按压或复位？

是的，设有功能、安全附件和安全措施，以防止紧急停止按钮的意外触发。.

• 锁定功能

紧急停止按钮可配备锁定功能，允许使用挂锁锁定，以防止任何未经授权的人员意外复位并错误地重新启动机器。.

需要钥匙才能解锁挂锁并复位紧急停止按钮，这些钥匙通常被安全保管，只有授权或受过培训的人员才持有。.

挂锁可以有多个，并且根据机器操作的风险程度或机器所有者的要求，需要配备与挂锁数量相同的钥匙。.

• 防护罩

这可以防止紧急停止按钮被意外触发。.

通常，它们由有机玻璃材料制成，作为紧急停止按钮的物理屏障。.

需要抬起防护罩才能接触到内部的紧急停止按钮。.

• 破玻璃式

这与火警报警器类似，按钮被保护在一个带有玻璃罩和附带小锤的 enclosure 内。.

发生紧急情况时，可以取下锤子敲碎玻璃，以便按下紧急停止按钮。.

如果您需要此类保护，请寻找紧急停止按钮保护罩、紧急停止按钮防护罩、紧急停止按钮盖、紧急停止盖、带罩紧急停止开关、紧急停止防护装置或紧急停止按钮防护装置。.

带防护罩和破玻璃罩的紧急停止按钮

16. 紧急停止按钮是否易于清洁？

高质量的紧急停止按钮通常由优质材料制成，包括其按钮采用防尘且光滑的材料。.

它也被归类为符合人体工程学的光滑按钮，具有天然的防污特性。.

17. 紧急停止按钮能否在危险场所使用？

是的，可以实现。.

有些类型的紧急停止按钮被评定为1区1类，这意味着它们可用于危险环境，例如存在油、气、石油化工产品等的场所。.

18. 通用按钮开关与紧急停止按钮有什么区别？

通用按钮开关通常用于控制。.

例如，用于启动机器或切换机器功能等。.

而紧急停止按钮则用作安全措施或停止开关，以避免安全风险或机器损坏。.

19. 紧急停止按钮的常见布置方式有哪些？

您会发现紧急停止按钮有以下常见的布置方式：

• 单按钮

这是紧急停止按钮最常见的布置方式，它独立设置，远离其他控制装置或开关。.

它通常位于紧急情况下易于定位和触及的区域。.

• 双按钮站

这包括启动、停止和紧急停止开关，它们集中布置在一个站附近。.

由于两个按钮的位置安排，操作员可能无意中按错按钮，导致紧急情况下停止机器延迟。.

例如，紧急停止按钮盒、紧急停止开关盒、盒式紧急停止、带外壳的紧急和停止按钮。.

• 定制控制站

这些通常由工程师构建，因此更为复杂，并包含按钮、多个开关、信号灯等的组合。.

它们通常由工程师根据客户个人规格或工厂需求，使用标准部件组装控制站进行定制设计。.

站面板的设计和控制装置的布置仍需符合既定的人体工程学标准和原则，否则即使是受过培训的机器操作员也可能感到操作混乱。.

例如，紧急停止站、紧急停止面板、三相紧急停止按钮和三相紧急停止按钮。.

• 紧急拉线开关

有些机器体积庞大，例如带有辊子、输送机或压延机的机器，由于其尺寸原因，如果只安装一个紧急停止按钮，则很难定位。.

这可能导致在造成机器损坏或人员伤害之前，找到紧急停止按钮为时已晚。.

这就是开发紧急拉线开关的原因，其中沿机器每隔几英尺单独安装按钮，或者连接至微动开关的拉线是另一种选择。.

推荐位置应设在人员最可能被卷入的地方，或被困人员易于触及的地方。.

双紧急停止按钮站

20. 影响紧急停止按钮使用的人为和机器因素有哪些？

有时，作为人类，我们识别危险、选择行动方案以及完成必要行动（也称为响应速度）的能力各不相同。.

机器也是如此，它们的构造不同，因此操作方式也不同。.

一台制造精良的机器比制造粗糙的机器能更好地执行其功能。.

因此，存在人为延迟和滞后，这些会影响紧急停止按钮被触发的时间，它们包括：

• 中央处理滞后
• 人类输入和接收器延迟
• 移动或动作时间
• 肌肉激活时间
• 神经传导延迟
• 显示延迟
• 系统或机器动态延迟

显示延迟和系统动态延迟指的是机器系统设计中电气和机械特性所导致的原因。.

而列表中的其他项指的是导致延迟的人为因素，这些因素在制造商设计紧急停止按钮时也会被考虑在内。.

21. Why training is important when using the emergency stop push button?

Machine operators and other personnel should have proper training when using the emergency stop push button.

So that when an emergency occurs and the machine needs to be stopped right away, they know where to locate the emergency stop push button and actuate it immediately.

Nowadays, industrial machines are becoming more complex and controls are not easy to learn.

It is not uncommon to find control panels with arrays of lights, different types of switches, knobs, levers, alarms, and so on.

Without proper training, the operator may not be able to do his or her job properly and know what to do when an emergency suddenly happens.

There’s also a significant difference in emergency recognition and response time if the personnel is well trained compared to untrained personnel during the emergency.

Trained machine operators relatively produce better performance, can respond faster to emergencies, can instinctively locate the emergency stop push button, and actuate it to stop the machine.

This is also supported by industrial engineers recognizing that repetitive practice, which can be considered as training, enables the operator to be familiar with the emergency stop push button actuation and function.

Trained complex machine operator

22. What are the recommendations about the design and placement of the emergency stop push button?

When using the emergency stop push button on any application, there are some recommendations that you can use as a guide so it can be consistent with the established ergonomic principles and human expectations.

• If possible provide noticeable warnings of imminent system failures needing manual emergency stops.
• Practice using the emergency stop push button regularly to master the motion of stopping the machine.
• Supply minimum power as necessary to achieve a desirable result.
• Get the machine inspected to reduce audible vibration.
• Mount the emergency stop push button in an easy locate the position where it is very accessible to be activated.
• If you have multiple equipment or machines, standardize the placement of the emergency stop push button to avoid confusion.
• Choose an emergency stop push button that is large enough to make it impossible for anybody to miss actuating it.
• Ensure that the emergency stop push button is the larger button than the other controls when it is placed on a panel.
• Separate the emergency stop push button from the other controls on a panel.
• Avoid using other colors aside from red and don’t use the same color on other controls.
• For practical reasons, the emergency stop push button should be round as much as possible.

Machines with separate controls

23. What is the difference between the emergency stop push button system than the cycle stop system?

Both systems are oftentimes mistakenly considered as similar systems but they are completely different.

The emergency stop push button system removes the power from the machine and this makes the machine stop while the cycle stop system is a command function that brings the machine to a graceful stop before an operating cycle is completed.

In a cycle stop system, the machine is usually on an automatic mode where it can restart its operating cycle once again after the stop.

It is also called a controlled stop because it stops the machine while retaining the power supply during the stop process.

While the emergency stop push button system stops the machine which is manually initiated, no power is supplied and used for emergency purposes.

24. Can you use the emergency stop push button for energy isolation?

The direct answer is no.

Although about 50 years ago, most people would believe that the emergency stop push button can be used to isolate an energy source but it is not the case.

This belief could be rooted in the HECP or Hazardous Energy Control Procedure called the lockout procedure where machines have padlocked emergency stop push buttons.

The padlocks prevent unauthorized resetting of the machines which are not ready for testing yet and for some reason, it was believed to be energy isolation devices.

HECP understands that normal safeguards could be bypassed or temporarily disconnected hence the lockout procedure was implemented.

One of the current standards, CSA Z460-05 [2], explains that an energy isolating device is a device that stops the halts the transmission or release of energy such as a circuit breaker, disconnect switch, conductor disconnect switch, line valve, a block, and other devices that are used to block electrical energy but not push button devices and other control type devices.

25. Can the emergency stop push button withstand water entry?

Yes, there are emergency stop push buttons that are waterproof.

Usually, they carry a seal that indicates the level of water and dust protection it has such as IP68 or IP69K, and these seals are considered dustproof and waterproof.

For example, waterproof emergency stop button, weatherproof emergency stop button, and outdoor emergency stop button.

The IP stands for Ingress Protection while the number figures represent the level of protection against solid and liquid entry.

IP69K sealing