Valves can serve a variety of purposes – flow control, pressure control, on / off, temperature control, and more. Each function requires different valves and configurations.
What is the process environment of what you are putting your van on?
If the valve is at -320F liquid nitrogen, it needs more seats, closed seals and other gaskets with valves located on water that can drink 70F.
This seems quite primitive but many people think that valves they need to have a line size. Sometimes buying a valve by line size makes sense but at other times. You can specify a smaller (less expensive) valve that will do exactly the same thing as a size line valve.
Do you need an automatic or pneumatic valve? What kind of activity – pneumatic, electric? Double acting, not open, not closed? If you compressed air, how much air to operate-60 or 80 psi? Do you want a solenoid or limit switch? All these questions (and more) are questions you should consider while specifying and purchasing your van. We realize that many individuals do not feel comfortable knowing exactly the right questions to ask to ensure that their valves are the correct valve for their application. Since making the years ago, we have provided our service to help the customer spec and buy the perfect valve for their application. Contact ValveMan today for support on your application!
Check valves for water applications require a lot of thought as you will put in any other valve options. Like all liquids and facilities, water has its own characteristics that should be combined with a valve that addresses this particular. Granted, this is a clear assumption, but choosing the perfect check valve for water may depend on a number of unclear reasons.
Drift: While this hydraulic phenomenon can be observed in other liquids, water turbidity occurs when an environment is forced to suddenly stop or change direction. When water or other vehicles are trapped inside the pipe only in two directions for travel, this appearance comes with vibration in the line and is usually loud noise. Both can spell damage.
Water transportation is a common occurrence in our world. In many applications, but it is still a tricky task to date, as maintaining an infinite steady flow is almost can not. The most likely cause of a water hammer is when a pump stops without warning. Water is reversed, going backwards towards the pump because the check valve can not close fast enough. Water hammer is sometimes called water slam.
Reverse Flow: Uncontrolled, upstream (or any material for that matter) can cause the pump to reverse, causing irreparable damage. Likewise, when water goes in the wrong direction for any length of time, it can cause serious damage to the entire distribution system. Unlike overflow valves, including, and in operation with, some check valves, a single check valve can not always be fooled. Reverse flow can occur.
Valve chatter: Valve chatter occurs when valve closes and closes continuously and frequently. Valve choking can cause damage to valves and lines, and can lead to overall failure.
While check valves are reliable, reliable, and newer, better. And innovative models each year, they all seek to prevent the three same issues listed above. Check valves, due to their simplicity, will operate regardless of external factors – such as power failure – but must be in the flow direction, and check the valve design and / or defects. .
There are two basic designs for check valves. One uses a disc (basically a cap), and a free ball. They all point in one direction, which means their job is to stop the water from flowing back through the line or system. Both types have pros and cons, but do the same job with fairly fair success (although manufacturers of one design or another may find another proof).
However, in the end, the success of the check valve depends on an action not too fast. But not too slow, or can lead to water hammer or back. Also, valve chatter is due to common mistake of oversize – just because a valve is fit, does not mean it is suitable for the application. Finally, like most valves, the success of the check valve depends on how it is sealed.
Valves are often used to store dangerous liquids or gases – potentially toxic, flammable, high pressure, or compressed air – not allowed to escape in any case. In theory, the valve must be completely secure and, when closed, never allow the liquid or air to pass. In fact, that’s not entirely true. Sometimes it’s better if one valve fails, intentionally, to protect another part of the system or machine.
For example, if you have a steam engine powered by steam, in which the steam is under construction. But the pressure is too high, you need a valve to blow open, let the steam out. And release Secure pressure before the whole boiler explodes catastrophically. Valves operating in this way are called safety valves. They are designed to automatically open when liquids or gases containing them reach a certain pressure (although many systems and machines have safety valves that can be opened manually for the same purpose).
Many different valves have different names. The most common ones are butterflies, fountains or sockets, gates, bridges, needles, poppet and cylinders:
Ball: In a ball valve, a hollow ball (ball) is placed tightly in a pipe, completely blocking the flow of liquid. When turning the handle, it causes the ball to rotate through 90 degrees, allowing the liquid to flow through it.
Butterfly: A butterfly valve is a disc located in the middle of a pipe and rotated horizontally (to accept a liquid) or vertical (to block the flow completely).
In the tap or plug, the flow is blocked by a shaped cone that moves to the side as you rotate a wheel or handle.
Gate or drain: The gate valve opens and closes the pipe by lowering the metal gate through it. Most of these valves are designed to be fully opened. Or closed and may not function normally when they are partially opened. Water supply valves use this type.
Globe: Faucets (hoses) are examples of globe valves. When turning the handle, you turn one valve upwards and this allows water pressure to flow through a pipe and pass through the nozzle below. Unlike a gate or drain, a valve like this can be set to allow more or less liquid through it.
Kim: The needle valve uses a long, slider needle to regulate precise fluid flow in machines. Such as car carburettors and central heating.
Poppet: The valves in the car’s engine cylinder are poppets. This valve is like a lid sitting on top of a tube. Each time, the lid is lifted to release or admit liquid or gas.
Spool: The drain valve regulates the flow of liquid in hydraulic systems. Valves like this slide back and forth to make the fluid flow in one direction or the other around a pipeline.