Pneumatic Valves & Actuators | Supplier & Contractor Malaysia

February 25, 2020

Pneumatics is an application of fluid power to perform work on an automated equipment. Equivalent to the distribution of electric power to electric motors, drives, and other devices, the principle behind a pneumatic system is by energy transmission using a collection of interconnected components with a medium of compressed air to generate, transmit and control power. While pneumatics harnesses the use of a pressurized gaseous media, hydraulics is an alternative form of fluid power, which uses a liquid media instead, typically oil, at a much higher pressure than for pneumatics application. In a pneumatics system, energy is stored in a potential state under the form of pressured air in a tank usually known as a positive displacement compressor and is put into working force when it is allowed to expand in a series of air vents and tubes. According to pneumatic valve supplier in Malaysia, this strong airflow finally drives the motor in the form of either linear motion such as in the applications of pistons, mechanical arms and ramps or rotary motion for drills. The control of the airflow is performed through the using power control elements, namely valves and actuators, carrying out functions of switches, sensors, relays and logic circuits, collectively building up to a complex automated system. Pneumatics are widely used in a broad spectrum of industrial settings such as for food and beverages, production and manufacturing plants, as they are simple to use and are reliable for a long-term service life under proper air preparation. The design of a pneumatics circuit is essential to ensure an efficient system that minimizes air use and that provides the quickest response as well. For your pneumatics designing and installation needs, contact Aathaworld, an experienced pneumatic system contractor to provide professional consultancy and services.

Pneumatics Directional Control Valves

Pneumatic systems are completed using many components, each assigned a specific function to supply, prepare, distributes and control the air supply. It is mandatory to filter and dry the compressed or pressurized gas and sometimes provide lubrication a well to ensure a clean supply and distribution in order to protect the cylinders, actuators and tools.  Most manufacturing plants include an air prep at centralized compressors and an additional air prep at each machines’ point of use, which includes a manual shut-off, a filter and a regulator that controls the system pressure and a lubricator to reduce the friction of some intricate machinery parts. The vital components executing the safe and precise control of actuators are the pneumatic valves, or also known as directional control valves by common specialists, such as pneumatic valve supplier Malaysia. These modulate the force, velocity and direction of air movement. The actuation of a pneumatic valve, that is to open or close the valve, may be accomplished electrically using a solenoid, motorized actuators and even manually using a foot pedal, toggle actuator, handle, knob or push-button. To identify the many types and specifications, pneumatic valves are classified using several kinds of approaches, in particular, the number of entry and exit ports they possess, the number of flow paths or switching positions available, the mechanism used to open and close the ports, and the position the valve is in its un-actuated state.

The main class of pneumatic valves are the directional flow valves that houses many variants and configurations to inhibit airflow or control the direction of it. Having a wide spectrum offered by pneumatic valve supplier in Malaysia, they are generally specified under a standard naming practice related to the number of positional envelopes of the valves and the number of work ports in the valve. It is also important to note that the specific order described also plays a significant role, to give an example, a “3/2 way directional valve” has three “ways”, i.e. the number of different pathways for air to travel in or out of the valve and two “positions” that is the number of different available states, i.e. allowing air supply from the source to the output and from the output to the exhaust. A three-way pneumatic valve has three ports, each serving different purposes – the first port to connect to an output, such as an actuator and the second to an airflow supply, while the third is used as an exhaust exit. Four-way directional valves are extremely common and function similarly to the three-way, albeit having two of the ports connected to actuators. They are amongst product range by pneumatic valve supplier Malaysia as the most common as the four distinct paths allow them to effectively reverse the motion of basic cylinder. Alternatively, an additional port is sometimes added, making it a five-way pneumatic valve, this supplementary port is often used to provide dual pressure such that the valve can choose between two specified pressure depending on the application requirement; otherwise it may also be used as a secondary exhaust port. As reiterated in several earlier accounts, pneumatic valves are manufactured in various renderings. Poppet valves are comparably simple, using a spring to push a face of a poppet down on its seat; they can often flow in a single direction, and has to be energized for it to flow in reverse. They are limited to two- or three-way ports configurations, but however a high flow conductance given their compact size, in accordance to pneumatic valve supplier in Malaysia. Spool valves, on the other hand has a notched metal cylinder that slides within a precisely machined body, allowing the drilling of three to five port, or even seven ports if its pilot operated. Unlike lower-end valves prone to internal leakage, higher-end spool valves use seals in the body and are constructed with high precision, requiring fine-lapping procedures during manufacturing. Superior quality valves uses a ceramic sliding block that offers high efficiency and also extremely resistant to contamination, making them highly suitable for dirty environments. Depending on the circumstances, the different types have each their advantages and disadvantages and are carefully selected to accommodate the needs of the pneumatic circuit, strongly encourage to get advise by pneumatic valve supplier Malaysia.

Pneumatics Pressure Relief Valves

Aside from directing the flow, pneumatic valves also take the form of pressure relief valves to control pressure at their inlet port by exhausting pressure to the atmosphere. As they are specifically meant for preventing excessive pressurization, relief valves are often referred to as safety valves and are generally not appropriate for use elsewhere other than during the air preparation stage such as in receivers, accumulators and other air storage devices. On the other hand, pressure regulators are used to relieve downstream pressure of the Filter Regulator Lubricator (FRL) unit by blocking the pressure upstream of the inlet, preventing the elevating of downstream pressure due to load-induced stress or thermal expansion. As an industrial operation, pneumatic actuator supplier in Malaysia may involve many substations and each have their own specified pressure requirements, it is common to implement multiple stages of pressure reduction, beginning from a large centralized compressor to the receivers feeding various workstations. Pressure regulators are mostly available as a component of a modular set, coming as a package with a filter, lubricator, dryer and other auxiliary units.

Pneumatics Flow Control Valves

Another essential element in pneumatic systems are flow control valves and its application are relatively straightforward – that is to make for easy adjustments to cylinder or motor velocity. On account of the pressure differential between the work ports of a cylinder, controlling the velocity in pneumatics systems is more complicated than for a hydraulic system. Conventionally speaking by pneumatic actuator supplier Malaysia, there are two different types of configurations – the choke valve and the check valve. The choke valve fundamentally provides variable restriction, using a screw or knob adjustment to control a variable orifice; while the latter serves to allow flow in one direction and restricts flow of the opposite direction. When looking into pneumatic flow control valves, it is very likely to come across terms “meter-in” and “meter-out”, the former controlling the exhaust flow from the actuator and the other restricting the air supply to the actuator. When “metering-in”, the actuator, i.e. a cylinder, will move rapidly with string force and efficiency, however this action of the piston is prone to spongy and unpredictable stability. On the contrary shared by pneumatic actuator supplier in Malaysia, the cylinder for metering-out is more stable and repeatable, trading off the efficiency and dynamic force used to push past the flow control. Inadvertently, most pneumatic system applications adopt meter-out controls, as its impediment is easier to overcome by increasing upstream pressure. Besides, a quick exhaust valve is added to increase the actuator’s velocity by venting air directly form the cap side work port and massively reduces the backpressure created upon retraction, thereby permitting very rapid piston velocity.

Pneumatic Actuators

Synonymous with pneumatic cylinders, pneumatic actuator is a control mechanism operated by a pneumatic supply controlled through a collection of valves and regulators. The use of actuators allows the automation of valves so that there is minimal human interaction and allow industrial procedures to be remotely operated and act as a shutdown framework during emergency situations, based on experience of pneumatic actuator supplier Malaysia. While they operate in a similar manner – that is by the kinetic movement of a device such as a piston or a gear, there are many types of actuators designed for several distinct purposes. In further detail, an actuator may act to move or hold the valve closure member to a desired position by providing sufficient torque or thrust under the most severe conditions. For example, a butterfly valve is fully seated when the disc is positioned in a resilient liner by the torque provided using an actuator. These types include double acting actuators, spring-return actuators, scotch-yoke actuators, rack-and-pinion actuators, diaphragm-style actuators and many others supplied by pneumatic actuator supplier in Malaysia. Given the variety of valve actuators available to meet most individual or plant wide valve automation requirements, contact Aathaworld, an experienced pneumatic valve and actuator contractor to make the best technical and economical choice as according to your business needs.

Where to find Pneumatic systems Contractor in Malaysia?

Aathaworld Sdn Bhd supply and install a wide range of pneumatic components, covering directional control valves, flow control valves, pressure regulators, filter regulator lubricator (FRL) unit and pneumatic actuators. As a pneumatic valve and actuator supplier, installer (contractor, applicator) in Malaysia, we are able to provide a full service consultancy, supply and apply for your project covering pneumatic system projects for manufacturing sites, production plants and other industries in KL Kuala Lumpur, Selangor, Klang Valley, JB Johor Bahru, Penang, Malacca (Melaka), Seremban Negeri Sembilan, Perak, Pahang, Kuantan, Kelantan, Terengganu, Perlis, Alor Setar Kedah, as well as Sabah and Sarawak for East Malaysia; in some circumstances, we are also able to be your supplier and subcontractor for other countries in Southeast Asia (SEA) such as Singapore, Myanmar (Burma), Cambodia, Vietnam, Laos, Thailand, Indonesia, Philippines, Brunei, Bangladesh as well as China, Taiwan, Hong Kong, Australia and New Zealand. 

 

Submit your pneumatics systems projects sourcing requirements (supply and install), either you are looking for a supplier or contractor for new pneumatic valves, or repair services in KL Kuala Lumpur, Selangor or other states in Malaysia. Submit your pneumatic systems sourcing requirements enquiry now to info@aathaworld.com or call (WhatsApp) to +(60)11-7001 1003 (Monday to Friday) or +(60)11-1188 1003 (Saturday, Sunday & Public Holidays).

 

 

 

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