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	Air Timers/Timed Delay Relays
	Pneumatic timers are used when you need to delay the air signal coming in or going out of your air component. Depending on the model chosen, the air time delay may be adjusted from 0.5 to 60 seconds. Pneuaire offers two different timed delay relay air timers. The NVR Air Timer offers a combination of adjustable orifice and fixed flow, allowing transmission of a pneumatic signal after a fixed time period. Our NVR air timers are available in normally closed (NC) only. KLC Air Timers are available in either normally closed (NC) or normally open (NO) models. Normally closed models are used to time in and normally open models are used to time out. Once set, our air timers are accurate for repeatablility to ±10% with regulated air pressure. Filtration recommended is 40 micron, while pressure range is 50-150 psi.
	Model Number Range Ports Length Width Height NVR2110-N01 Normally Closed 0.5-60 sec. 1/8" – – – KLC-105 Normally Closed 0.75-6 sec. 1/8" 4" 1" 1 1/2" KLH-105 Normally Open 0.75-6 sec. 1/8" 4" 1" 1 1/2"
	More Technical Specifications
	NVR Air Timer NVR2 110-N01		NVR2110-N01 Add to Cart
	KLC Air Timer KLC- 105		KLC-105 Add to Cart
	KLH Air Timer KLH- 105		KLH-105 Add to Cart

Air Timers/Timed Delay Relays

Electricity is a wonderful force, and also a potentially dangerous one. Before we learned to harness currents for industrial purposes, many science experiments involving electricity would potentially lead to injury. We’ve had two hundred years to understand basic principles and safety rules. Even so, we should always exercise caution when working with machines.

With manufacturing and other industrial purposes, we often work with hazardous substances such as oil and gas. They also will catch fire easily if given an opportunity to combust. These would lead to electric fires, a danger no one wants.

One blaze can cause costly damage, and injure people in the workplace if they ignite gases and oils. Obviously, then, it’s not fun for anyone. Insurance also will not enjoy having to cover damage from a fire and raise your rates. Yet the risk will always be prevalent.

What is the solution then? You need to have a failsafe that can take action in seconds to prevent an electric fire, or at least reduce the damage. At SMC Pneumatics we have the answer: air timers with programmed delays.

Air Timers And Timed Delay Relays

Pneumatic timers are used when you need to delay the air signal coming in or going out of your air component. They are one machine failsafe that can reduce electric fires because they use air pressure instead of voltage currents to work, and will cut power or start it when necessary. Depending on the model chosen, the air time delay may be adjusted from 0.5 to 60 seconds.

Pneuaire offers two different timed delay relay air timers. The NVR Air Timer offers a combination of adjustable orifice and fixed flow. This combination allows the transmission of a pneumatic signal after a fixed time period. Our NVR air timers are available in normally closed (NC) only.

KLC Air Timers are available in either normally closed (NC) or normally open (NO) models. Normally closed models are used to time in and normally open models are used to time out.

Once set, our air timers are accurate for repeatability to ±10% with regulated air pressure. Filtration recommended is 40 micron, while the pressure range is 50-150 psi.

Benefits of Pneumatic Timers

Pneumatic timers are built for convenience, and for increasing workplace safety. You can customize their timing as you see fit for a certain purpose. They have various timings and contacts for using air pressure.

Many delicate instruments require clean spaces with control over temperature and moisture. These timers don’t need to cause worry since local temperatures will not affect how they work, though avoid extremes when possible. Since pneumatic timers rely on airflow, they can function in areas with ample moisture, which works for humid environments. Even if a workplace gets flooding or requires use with water, the timer will continue to function.

In addition, pneumatic timers have a low learning curve. Do you need to set your timer for a precise amount of seconds? The buttons and valves should be marked and easy to operate. You need to make sure that air supply is flowing, and that you know the ideal interval. Even so, it’s not hard to learn about these concepts. Once you know the basics, then you can figure out what kind of timer you need for your machine.

Electrical Timer Working Principle

Many devices, inside and outside of pneumatics, use time-delayed relays. Most of the principles that apply to pneumatic timers will also apply to other relays, accordingly.

Time-delayed relays have either an on-delay or off-delay system in place. They are polar opposites, in terms of how they function, but both seek to assist in machine function as a failsafe.

The on-delay factors in when power is applied to a machine because it starts a timer within a window. Once the window passes, the circuit turns off and waits until the power is removed from the machine to potentially start again.

Off-delay timers don’t rely on power, but rather on control inputs. The control input starts the timer when activated, and only when it runs out does the machine run out. If you remove the power earlier, then the timer and machine reset on the current flow. Plenty of machines use off-delay options.

In both of these types of timers, you can adjust the devices to your convenience. While it’s better to not ignore common sense, you can estimate what timings work best for your pneumatic devices. That timing will make all of the difference.

Pneumatic Timing Relay

A pneumatic relay isn’t that much different from a regular relay; the main difference is the source of energy. We use air pressure instead of electricity necessarily, and that’s why we need a consistent air flow without any blockage.

In addition to airflow, you need to constantly check for leaks and measure air pressure. Alternatives to oxygen or normal air would be helium, hydrogen, argon or neon. We would not recommend using helium at this time due to a worldwide shortage, but it is one possible option when you want a safe gas.

Over time, you’ll need to replace any gases lost to pneumatic processes. With or without leaks, each pneumatic process will use up a tiny portion of air.

Pneumatic devices can use a combination of electric, mechanical, and air pressure forces for their processes. This can include the various on or off-delay relays, as well as valves and switches. When the relay opens one switch, air can flow into a necessary valve or port, so that the machine functions.

When is a combo necessary? You want energy combinations when there are multiple functions to use. Let’s say you want to cut off an electric current. Mechanical energy can help send the signal to cut off the voltage.

Go Large Or Miniature?

What size will you need for your pneumatic device? It depends on what functions your device has, and the relative size. The wrong size can mean your machine operates at a lower rate, even if it does prevent disaster.

Larger air timers tend to have more ports, and thus can handle more complicated intervals. They can also be used to handle a greater amount of work and functions, at a higher cost. If you have the money, and you want to handle multiple processes in the long run, then a regular or large timer should do the trick.

A miniature pneumatic timer is less expensive than a regular timer. It has only two ports and is usually made of transparent plastic so that you can see every function and component. The miniature models are best for when you’re on a budget, and when you don’t need a complicated device.

Learn more From SMC Pneumatics

Still not sure which model would work for you? Our experts at SMC Pneumatics can help. We want to help you outfit your machine in the best possible way.

Reach out to us today. We can make recommendations on what air timer will work for you.