Needle valves + chemical valves for the chemical industry

Needle valves and chemical valves from SMC ensure safety in the chemical industry

Chemical valves and needle valves are used in various industries that work with chemicals. These are, for example, large printing companies, electroplating or commercial disinfection.

The most important characteristic of the valves is that they are resistant even to aggressive chemicals such as acids, bases, or solvents. Only then the necessary security can be guaranteed.

Needle valves for adjusting the flow rate

A needle valve has a small opening and a needle-shaped, threaded valve piston. They can be used to precisely adjust the flow rate, which must be larger or smaller depending on the process and can be regulated between 0 and 12 liters per minute. Needle valves are designed to prevent bubbles from forming when slightly viscous liquids are used.

LVN – needle valves from SMC are made of a PFA material that is compatible with acids, alkalis and ultra-pure water and suitable for temperatures from 5 to 90° Celsius.

Chemical valves with LOTO function

Chemical valves are used to turn the flow mentioned above on and off.

The special LOTO function (lockout tagout) enables maintenance work to be carried out safely. With this safety feature, a valve is closed manually and fixed in this position. Accidental opening during maintenance work can thereby be avoided.

Areas of application in the chemical industry

Chemical valves and needle valves from SMC withstand aggressive chemicals such as acids and alkalis, as well as solvents used for industrial disinfection or dissolving printing ink, which can attack seals.

SMC valves for the chemical industry are especially suitable for use in the following industries:

  • Fertilizer
  • Plant protection
  • Varnishes, paints and printing inks
  • Professional cleaning and hygiene
  • Textile, leather and paper auxiliaries (special chemicals as auxiliaries or finishing materials enable the manufacture, processing, finishing or care of textiles, leather products or paper)
  • Adhesives


Depending on the area of application, different valves make sense. For example, if organic solvents are used, it is advised to use valves made of stainless steel. We offer a wide variety of variants and our chemists will be happy to help you make the right choice – just contact us.

We carry the following series of chemical valves:

  • LVD chemical valves are pneumatically operated, with integrated screw connections, and are suitable for media temperatures of up to 100° Celsius
  • LVA chemical valves also work pneumatically, with a threaded connection
  • LVH chemical valves are manually operated valves with integrated screw connections or with thread and available as latching or non-latching valves
  • LVQ chemical valves with integrated screw connections of various designs; both pneumatically and manually operated. There is also an option for media temperatures of up to 170° Celsius.

Features of SMC chemical valves

A new type of guide ring on the piston rod ensures a stable sealing surface by preventing lateral play of the valve seat. This extends the service life of the seals and reduces particle formation thanks to a stable working surface.

The special membrane design guarantees soft opening and closing, which prevents the formation of microbubbles.

The housing is designed for evenly flow with minimal internal dead spaces. Integrated fittings prevent residual liquid from accumulating in the pipe threads.

The body material (PFA) is suitable for ultra-pure DI water as well as for acids and bases, as it has an extremely high chemical resistance.

A damping disk absorbs the force of the piston and thus minimizes the formation of particles due to friction.

The membrane is supported by a shock absorber so that it deforms as little as possible, which ensures high back pressure resistance and durability.

You can also choose from a variety of tubing sizes.

Do you want to find out which of our needle valves and chemical valves are best suited for your application?
Contact us – our team will be happy to answer your questions.

Tube-in-tube temperature control for lower costs in semiconductor manufacturing

Microchips have become an integral part of our lives today – they are in use almost everywhere: automotive and vehicle technology, industrial automation, robotics, energy and environmental technology, home electronics, healthcare and agricultural electronics.

However, before wafers and finally ready-to-use microchips are made from quartz sand, numerous work steps are necessary. Many of the media used in semiconductor production require precise, constant temperatures. This is the only way to ensure an optimal process result.

Silizium-Wafer von Intel Quelle: Intel
Quelle: Intel

Lower manufacturing costs thanks to constant temperatures

One of the working steps in semiconductor technology is lithography. For this purpose, special photoresist and developer media are delivered in small containers and placed either in the gray room or directly in the machine. Both photoresist and developer need a certain temperature, which also remains stable.

Fluctuating temperatures have a negative impact on the process. A temperature difference of 1 ° C results in longer process and rework times, among other things. This in turn causes the manufacturing costs of the wafer to skyrocket. On the other hand, if you manage to keep the temperatures surrounding the medium constant, the costs of production decrease.



The tube-in-tube principle ensures stable temperature control of media up to +/- 0.1 ° C

Liquids or media such as photoresists do not have a chemical supply with independent temperature control. A tube-in-tube solution that ensures constant temperature control makes sense here.

The tube-in-tube principle for medium temperature control works as follows:

  • An SMC temperature control unit pumps a pre-tempered circulating medium or circulation medium into an (outer) tube.
  • In this outer tube there is a high-purity PFA inner tube hose with a smaller diameter, which contains the process medium.
  • The pressurized medium container conveys the process medium directly to the point-of-use in the process chamber and onto the wafer by means of a stop-and-go process.
  • During the stop phase, the medium in the inner tube is brought to the required temperature.

Based on the tube length and size, you determine the amount of process medium to be pre-tempered and you can set the set point to up to +/- 0.1 ° C.

This tube-in-tube principle is suitable for both cooling and heating.

Schlauch in Schlauch Wärmetauscher Quelle: SMC AT
Quelle: SMC AT

Advantages of the SMC tube-in-tube solution at a glance

  • Thanks to the pre-tempered medium, continuous process operation is possible.
  • Using the tube length and tube hose diameter, you determine how much process medium is to be pre-tempered.
  • Temperature accuracy +/- 0.1 ° C.
  • Cost reduction, as no expensive and time-consuming rework is necessary.


mögliche Anwendung eines Schlauch in Schlauch Wärmetauschers Quelle: SMC AT,
Quelle: SMC AT,

Complete solution for medium temperature control

With us you get a complete solution for your application: From temperature control units to a high-purity, chemical-resistant PFA tube-in-tube solution to fittings or screw connections (also chemical-resistant), we can offer you everything from a single source.


Would you like to find out more about our tube-in-tube temperature control and its possible applications?
Contact usour team will be happy to answer your questions.


Valve Automation

Valve Automation: Solutions from a single source at SMC

Valve AutomationThere are valves in almost all areas of industries and they usually have to be operated and automated pneumatically. Industrial valves control and regulate the flow of gases, steam or liquids in pipelines. If necessary, the valves also shut off the flow.

Components for automated industrial valves

In order to be able to do all of this automatically, industrial valves require the following three components:

  • Actuator
  • Compressed air supply
  • Positioner


Valve Automation

An actuator is a drive unit used to control a valve. This happens by converting an electrical signal into mechanical movements and thus actively intervening in the controlled process. In process automation, pneumatic or hydraulic drives are often used for this.

In order to be able to control large valves safely and easily, compressed air is required, and a positioner is necessary to regulate the compressed air to the cylinder.

Positioners are electrical-pneumatic control units that adjust pneumatic cylinders precisely in any position – they control the compressed air to the actuator. The positioner is connected to the drive mechanically or with a remote sensor and converts the electrical or pneumatic input signal into a corresponding output signal that determines the target position. The actual position is determined by means of position feedback and any difference of the actual position to the target position is adjusted accordingly.


Complete solutions and one-stop-shop for valve automation

What sounds like a lot of effort in procurement and solution development is actually quite simple and you benefit in two ways:

Valve AutomationWe offer you all-in-one solutions for your valve automation and develop individual solutions for your applications according to your wishes and requirements with high-quality SMC products.

As a one-stop shop, we have all the necessary components available, from positioners and special valves to complete compressed air supplies including accessories such as one-touch fittings made of stainless steel.

Where is valve automation used?

Valve automation makes sense for users who have to control large valves for gases or liquids. These include

  • chemical industry
  • water supply, water and wastewater treatment
  • sewage treatment plants
  • paper industry
  • thermal power stations

Valve Automation

Integrators such as system builders, mechanics, metal workers, engineers or valve specialists often take care of the installation of the automated industrial valves at the user’s facility.

You can find examples of our solutions for valve automation on our YouTube channel.

If you are planning a new system or have problems with your existing valves, we can recommend various integrators and answer your questions – just contact us.


HRL Dual Loop Chiller für Hochleistungslaser sparen Platz und Energie

HRL dual loop chillers for high-performance lasers save space and energy

We developed the air-cooled dual loop chiller of the HRL series especially for industrial applications with high-power lasers. It ensures constant temperature of the cooling water. Such laser applications are cutting, welding, measuring, coating, sintering and stereolithography.

Since lasers generate heat, cooling is an important part of any laser process. Exact and stable temperature control extends the service life of the sensitive laser devices, prevents failures and ensures continuous availability. You can find more about laser temperature control in this link.

The fact that the chiller can operate two cooling circuits at the same time saves space – the dual loop chiller reduces the space required by around 22 percent compared to two individual devices.

At the same time, the temperature control unit saves a lot of energy. With a triple inverter, it adjusts the motor speed depending on the load. The chiller uses up to 34 percent less energy than non-inverter devices.

A sealless mechanical immersion pump also ensures that there is no leakage and reduces maintenance costs.

Versions of the HRL Dual Loop Chiller

The air-cooled temperature control unit of the HRL series is available in three versions with different cooling capacities: 10 kW, 20 kW and 27 kW, with 1 kW each reserved for the second circuit. The temperature stability is +/- 0.1 ° C or +/- 0.5 ° C.

High temperature accuracy and stability

The simultaneous control of the compressor, fan (both frequency-controlled) and the electronic expansion valves keep the temperature stable even with fluctuating heat loads (oscillator with stable load +/- 0.1 ° C and optical system +/- 0.5 ° C) .

Due to the power density, this high temperature accuracy ensures optimal energy yield and enables excellent focusing of the laser. The stable temperature contributes to low component wear, which in turn ensures a long service life.

To prevent the formation of condensation, the HRL Dual Loop Chiller does not allow you to set a lower temperature for channel 2 (optical system = laser head) than for channel 1 (oscillator = laser source). This means that incorrect settings are pretty much ruled out.

Anwendungsbeispiel - HRL Dual Loop Chiller für Hochleistungslaser

Saves space and saves time

With the Dual Loop Chiller from the HRL series, you not only save up to 22 percent floor space, but also benefit from the reduced cabling effort: You only need one power supply for the separate temperature control of two media circuits and therefore less work for the cabling.

Less energy consumption

In non-inverter devices, the speed depends on the mains frequency, which means that power is wasted. With our dual HRL industrial cooler, however, you save up to 34 percent energy. This is made possible by the built-in triple inverter, which controls the motor speed of the compressor, fan and pumps depending on the load of the user system.

In addition, our dual loop chiller heats the circulating fluid without an electrical heating element, thereby saving additional energy. Instead of the heating element, the process heat from the compressor is used by using the already heated refrigerant (gas).

Easy to use touch panel

The user-friendly touch panel enables various displays and settings: The status display provides information on temperatures and flow rates, for example; individual data can be entered using the numeric keyboard; the temperature profile of the circulating fluid can be traced via the display.

As soon as an alarm is triggered, the screen automatically changes to the information screen and shows codes and contents of the alarm.

If a component reaches the specified service life and needs to be replaced, a maintenance notice is given.

Further features and advantages of the HRL Dual Loop Chiller

There are three different operating modes of the circulating media pumps that you can select via the touch panel:

  • Pressure control mode
  • Flow control mode
  • Pump operating frequency (rotation) control mode

In addition, both circuits use mechanical, sealless pumps. This saves you regular checks for leaks as well as the replacement of mechanical seals and reduces the overall maintenance effort.

The following are also included as standard:

  • Integrated bypass (one bypass valve each for oscillator and optical system)
  • Electrical conductivity control with DI filter and built-in solenoid valve for control, whereby you can freely set the specific electrical conductivity of the circulating medium using the touch panel
  • Particle filter set to remove impurities from the circulating medium – thanks to a transparent container, contaminated elements can be easily identified and effectively protect your system from the ingress of foreign matter
  • Transport rollers for moving as well as adjustable feet for fixing the cooler


Would you like to find out more about our HRL series dual loop chiller and its applications?
Get in touch with us – our team will be happy to answer your questions.


Vacuum ejector made of PFA

Vacuum ejector made of PFA – corrosion was yesterday

Vacuum ejectors are used wherever aggressive chemicals have to be sucked in. But the conventional ones tend to corrode easily due to the materials used. Therefore SMC manufactures a vacuum ejector made of PFA.

Suction by vacuum is the most common (and logical) procedure in factories with aggressive chemicals. For this purpose pumps would simply be too large and also too expensive. With the Venturi effect liquids can be sucked in easily and safely. But unfortunately, most materials corrode much too quickly – after all, they come into permanent contact with aggressive chemicals.

The vacuum ejector that does not corrode

We know how important stable processes are. Therefore SMC has developed the first vacuum ejector made of PFA for you. PFA is a material that can come into contact with all chemicals without any signs of fatigue or corrosion. So the optimal material for vacuum ejectors.

The proven mode of operation, the Venturi principle, has of course remained the same: The vacuum is generated by gas, air or liquids. The flowing medium is introduced into the ejector and accelerated by a cross-sectional constriction in the Venturi nozzle. There, the dynamic pressure (dynamic pressure) increases while the static pressure of the medium decreases to a minimum. At the same time, the pressure in the pick-up tube, which is located exactly in the narrow part, drops – thus creating a differential pressure/vacuum.

Another special feature of the vacuum ejectors from SMC is their space-saving design. The PFA used makes them particularly durable, which makes the price-performance ratio particularly attractive.

Where are vacuum ejectors used?

In most cases, vacuum ejectors are used for suctioning drain overflow trays. Another field of application is the mixing of media. For example when diluting acids or alkalis or when mixing different chemicals. The mixing ratio can be determined by throttling the flow rate. The faster the medium flows through the ejector, the greater the negative pressure.

Wherever aggressive chemicals are used, the vacuum ejector made of PFA scores with its many advantages: Durable, inexpensive to purchase and with extremely small space requirements.

Would you like to know whether you too can benefit from this innovation? Please contact us – we will be happy to advise you!


Valve for gas bottles

Flushing Heads: The flushable valve for gas bottles

When processes take place with gases, there is often a risk for employees and the environment. Especially when it comes to poisonous, explosive or highly reactive gases that must not be released. Flushing Heads, the flushable valve for gas bottles, ensures that gas bottles can be exchanged safely.

Replace gas bottles – there is always a residual risk

If you change gas cylinders in your company, you know the problems: There are gas residues in the valves that are inevitably released. Depending on the gas, there is a high risk for your employees and also the environment. And certain gases must not escape under any circumstances.

Replace gas bottles safely with flushing heads

Flushing Heads, the flushable valve for gas bottles, solves these problems in an ingenious way. Instead of a conventional valve, a valve terminal with three valves is used, which are combined in the flushing head. A large connection leads to three outlets that you can open individually with valves.

But how does flushing heads work? Quite simply: One outlet leads to the process line, one is connected to nitrogen and one to a vacuum generator. In normal operation, only the process line is open. But as soon as the gas bottle is empty, you can close the valve to the process line. Now use the other two valves to alternately supply vacuum and nitrogen for cleaning into the valve terminal. In this way, you can safely open and replace the gas bottle without any gas residue escaping.

This solution is also beneficial for your processes, as the contact with air and moisture is kept very low and your process gas is not contaminated by the atmosphere.

SMC custom-made products for your processes

Regardless of the process involved – Flushing Heads, the flushable valve for gas cylinders, works with all possible combinations of manual and pneumatic valves. The custom-made products from SMC are tailored exactly to your requirements. From Din 477 connections to butt weld spigots to face-seal connections and beyond, everything is possible.

Are you interested in flushing heads? Contact us, we will be happy to advise you!

SMC Bonded Layer Manifolds

Bonded Layer Manifolds – efficient in the smallest of spaces

Sometimes a large number of fluid channels have to find space in a very small space. For example in medical technology, when liquids or gases are transported through many different fluid channels. Bonded Layer Manifolds from SMC score here with their outstanding quality.

Valves, hoses and fittings need space. And that is not always there. Both analysis and medical technology have to accommodate complex fluid connections in the smallest of spaces.

What are bonded layer manifolds?

Bonded Layer Manifolds are fluid circuits that transport liquids or gases wherever there is no space for hoses, valves and fittings. They consist of individual layers (layers) into which different fluid channels are milled. The layers are then placed on top of each other and bonded to one another in a form-fitting and absolutely tight manner under exact pressure and temperature conditions (bonding process).

The most important advantages: They can contain many hundreds of fluid channels in the smallest space and can be precisely integrated into the respective devices. Integrated functions such as tanks or storage are easily possible and dead volume can be completely avoided with bonded layer manifolds.

Particularly pleasing for our customers: These are plug & play solutions. You do not have to hose anything, just fit the relevant device with the manifold and you’re done. The maintenance effort is also zero.

Manufacturing is about customer requirements

Bonded Layer Manifolds are always one-offs that are tailored to the specific requirements. At SMC you also benefit from our years of experience. We analyze your circuit diagrams before we start production and discuss with you on site how your fluid paths are best arranged.

As soon as we have your circuit diagram, we design a layout that can be adapted again if necessary. For you, this means maximum security: 1. that the bonded layer manifold exactly meets your requirements and 2. that no costly incorrect production is commissioned.

SMC: Your local contact

Are you looking for a special solution? Then get in touch with us. Wherever your company is, SMC is close at hand. Our staff will be happy to advise you on site!

Modular cooling

Modular cooling water distribution with flow sensors from SMC

With the flow sensors from SMC you can easily and reliably monitor up to 10 stations simultaneously. And in the smallest space!

We at SMC help you to make your processes as efficient and stable as possible. The cooling water distribution is always an important issue – from assembly to maintenance.

Modular cooling water distribution made easy

The modular flow sensors of the PF3W series help you save. Namely space, time and money. The sensors are space-saving and compact and monitor up to 10 stations simultaneously. And with flow ranges from 0.5 to 4 liters, 2 to 16 liters or even 5 to 40 liters per minute and line.

The PF3W series scores with many advantages: All media-contacting materials are copper-free and therefore suitable for DI water, have an integrated flow and return unit and are already fully assembled. This makes installation particularly easy and inexpensive and reduces the possibility of leakage to a minimum.

The distribution of the cooling medium is set via a needle valve and you can shut off the individual strands independently of one another for maintenance work, which saves you a lot of time in the operational sequence.

Reliable flow sensors for your processes

Another important topic is temperature monitoring. Integrated two-color displays ensure that you can see all relevant information for each individual line at a glance. In this way you can recognize process changes in good time and can always check whether the cooling function is ensured.

The Karman vortex measuring principle in our flow sensors does not require any moving parts, which significantly increases the service life.

Further advantages: simple implementation, a digital switching output and an analog output. Of course, the SMC flow sensors are I / O compatible and can be combined with SMC temperature control units.

Where are flow sensors used?

Many processes depend on safe cooling. The flow sensors from SMC are therefore used in various industries. For example in laser temperature control, where precise cooling devices ensure constant temperatures. The coolant distribution is an important part so that the optical components of the laser are not changed by temperature differences and the laser can continue to work precisely.

The flow sensors of the PF3W series are a guarantee for consistent quality even in water-cooled welding. This enables process changes to be recognized and remedied in good time, which increases the lifespan of the components enormously and at the same time greatly reduces maintenance.

Of course, many other industries and processes also benefit from modular cooling water distribution and monitoring. We are happy to help!

Would you like to know more about the flow sensors of the PF3W series? You can download our catalog here.

Pumpen für aggressive Chemikalien von SMC Fluidcontrol

Pumps for aggressive chemicals – nothing gets stuck!

When pumps have to transport highly aggressive acids or alkalis, they quickly reach their limits. Unless they were made by SMC. Because our pumps for aggressive chemicals fulfill the highest requirements.

Many know the problem: Your pump conveys a highly aggressive acid, which you need for the surface treatment of glasses, crystals or other products. And then it gets stuck without warning and production stops. It may take days before you have installed the necessary spare parts or replaced the entire pump. This is not only annoying, but also economically problematic. Especially if timely delivery dates depend on your equipment operates smoothly.

Why pumps for aggressive chemicals get stuck

SMC Fluidcontrol: Pumpen für aggressive Chemikalien

In most cases, it is the same two weaknesses that put your pumps into early retirement. The chemicals diffuse – particles penetrate the plastic membranes – and attack the metal slide behind it, which then corrodes quickly and can no longer move on. The second problem is mostly caused by low-quality plastics that deform due to permanent contact with the chemicals.

SMC has therefore developed special pumps for aggressive chemicals that score with a particularly long service life and reliability. Instead of stainless steel valves, we use ceramic valves that cannot corrode. And our specially treated, hardened PTFE for the check valves never changes shape – so the pump can do its job unhindered.

Specially designed pumps for all challenges

Pumps often go through a lot. They have to move liquids over long distances and elevations, overcome gravity and deal with pressure drops that are often unnoticeable to anyone. All of this further reduces their lifespan. If the cross-section is then incorrectly calculated and the pump is too small, production downtimes are inevitable. Reaching large pumps for this reason is an unnecessarily costly solution.

SMC helps you to find the right pump for your application. Our pumps for aggressive chemicals save time and money: They are available in two versions (1-20 l / min and 5-45 l / min), are practically maintenance-free, durable and guarantee you a smooth production process.

Are you interested in a durable, long-life pump for your production? The SMC team will be happy to help!


wassergekühltes Schweißen

Water-cooled welding at the highest level

Welding causes extremely high temperatures – the arc can reach up to 30,000 ° C, which of course has a very negative effect on the service life of all components. The solution is water-cooled welding. SMC has developed very special solutions in this area.

If you want to achieve more productivity and quality when welding, you have come to the right place at SMC. Our complete solutions for water-cooled welding bring many advantages – including a longer electrode life, higher welding speed and a stable arc.

This is how the complete SMC solution for water-cooled welding works

wassergekühltes SchweißenLike every complete solution, ours consists of individual parts that interlock and are perfectly coordinated. We are happy to support our customers in the development and fine-tuning of the components. All in all, these individual parts make the big difference for the user:

  • From the chiller, the cooling water can be distributed to several welding strands at the same time, which can be cooled at the same time. This means that only one device is required; maintenance costs are reduced, as is the space requirement.
  • Permanent flow monitoring guarantees that process changes are recognized in good time. In this way, the cooling function remains ensured. If the flow is too low, an alarm is triggered automatically. The customer can react accordingly to prevent damage to his system.
  • Communication with the welding system is possible with digital inputs and outputs as well as with the standardized transmission type RS232 / RS485.

Which components are cooled:

  • The welding torch is provided with holes through which water is passed, thus cooling the gas nozzle and the electrode. Of course, this increases the durability of the electrode, but also ensures a focused arc.
  • When welding, high currents are used. Usually all power lines are laid in a hose so that the cables are automatically cooled. Condensation can be prevented by setting the chiller’s setpoint to 20 to 25 ° C.
  • If the chiller is designed accordingly, other components such as electric motors or shields can also be cooled.
    For many customers, we have already implemented special complete solutions for water-cooled welding, always with the main focus on optimizing the application together with the customer according to their specific needs and requirements.

One provider, many advantages

In addition to greater convenience, SMC also scores from an economic point of view: many applications have several independent systems in operation at the same time and just as many cooling systems installed. The consequences are significantly higher maintenance costs and often a lack of space. With the complete SMC solution, all of this is a thing of the past.