Chances are high that if you work in any type of lab or production environment with liquids or gases, then you are probably acquainted with a selection of classic corded valves. For a fast refresher: pneumatic valve help to control, handle and handle the number of media, liquids and fluids, which flow through a system.
Kinds of Pneumatic Valves
Fundamentally There are two quite different types of electrical valves. The first electric valve kind is where an inert gas is your pneumatic drive pressure. These type of valves operate or manage the origin air in an automated system. While frequently known as pneumatic valves, they can be actuated (operated) by manually, by pneumatic actuation, by solenoid actuation, or by motorized actuation. Ultimately, all of them serve the identical function: they modulate or control the source air for an automatic system. Based on the system specification and plumbing line dimensions, such pneumatic valves can be of a gate, plug, diaphragm, wedge, or ball design, to name a few.
These valves may be actuated on a variety of methods, however, their purpose is to handle the driveway air or inert gas. These electric valves are often controlling, controlling or managing Clean Dry Air (aka CDA) to get a production process. Those pneumatic devices in turn could be regulating procedure media or transferring mechanical systems.
The second sort of pneumatic valve is one where the press is really a process gas or fluid, which has been manipulated, controlled or managed by valve. The CDA or source air pushes the valve to position (open, closed or some partly open place ). The pneumatic valve, attached to its own telescopic actuator, will regulate the media flowing inside the process.
Both pneumatic valves for automation management and process fluid managing remain very common in business. While they’ve seen some displacement by means of electro – mechanical (servo & stepper motor driven) and hydraulic driven platform, pneumatic actuation stay a economical method of actuating valves. For many applications pneumatic are preferred; for instance, within the semiconductor sector pneumatic systems operate cleaner with much less positive-charged ions out of metals. Over the life science businesses, pneumatic systems run more sanitary for human and food safety.
A further distinction within the kinds of Pneumatic Valves available on the market can be seen in their porting configuration. Pneumatic Valves may be ported in a vast assortment of configurations. The industry segments valve porting into three key classifications: the port dimensions, the port style as well as the manners of this valve.
Port Sizing: Pneumatic Valve vent sizes can vary from less than 1/16″ to greater than 48″ in diameter
Port Ways: Pneumatic Valves may be design and manufactured as a 2-Way (the most simple inlet and outlet valve), 3-Way, 4-Way, as well as larger quantity of means. Multi Way Tasks are frequently used as Selection or Distribution Valves. Where one manner is dedicated since the inlet or outlet of the valve and another multiple ports (or ways) signify the choice or supply of media flow.
Pneumatic Valve Materials of Construction
Pneumatic Valves for automation controllers reside away from the process press. They are usually made with a mix of substance, which include: plated carbon steel, bronze/brassand stainless steel, and a wide array of industrial grade plastics (PVC, Nylon, Acetal, etc..)
Therefore the valve design does not need to take into account the aggressive corrosive nature of the networking or accounts for its high purity grade of their media.
Whereas, the Pneumatic Valves for process fluid managing the press is crucial. The media is one of the main selection criteria for picking the electric valve. These valves handle highly contaminated, corrosive alkaline and/or higher purity media. The designer should choose materials of construction for all wetted surface of the valve, and which are vulnerable to the press, to protect the media and the valve.
Polytetrafluoroethylene (PTFE) as a Construction Material
Pneumatic Valves for procedure fluid handling should first and foremost think about their stuff of construction. PTFE Pneumatic Valves are manufactured for crucial media procedure handling. Licensed virgin pure PTFE fabric is the first sintered Polytetrafluoroethylene (PTFE) without any sort of impurity or regrind or recycled plastic.
PTFE Pneumatic Valves can handle the harshest low pH acid, so the corrosive high pH alkaline, and the purest of media. By its character PTFE is extremely inert and extremely chemical resistant. It’s frequently one of the best material choices for Pneumatic Valves for process handling of critical media.
In later articles we will examine the procedure manufacturing of Teflon® (the former signature of Dupont). Teflon® is the world famous brand name for Polytetrafluoroethylene (PTFE). We will research where PTFE get its great chemical resistance, temperature performance, low friction properties and outstanding inertness.