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Showing posts with label Check Valves. Show all posts
Showing posts with label Check Valves. Show all posts

Friday 7 September 2018

Check Valves - Things All You Should Know

  02:24   , ,   No comments   Edit
Check valves are a kind of valves that serve multiple purposes and are an essential valve required in almost all the industries. Practically, there is no industry where these are not installed on the operating systems. Valves in general are a critical component of any machinery and therefore must be selected after proper research for quality, durability, and sustainability. Your decision will greatly impact the functioning of machineries and the ultimate outcome of the project the valves are used for.



Construction of a Check Valve


The basic construction consists of a bonnet, valve body, and a disk that is attached to a hinge and moves away from the valve seat to allow the fluid to flow forward and returns when the upstream flow is stopped and thereby preventing reverse flow. The folding disc valves have a disk that consists of two halves that are attached in the middle and fold backwards once the upstream flow is initiated. When the upstream flow stops, these two halves spontaneously close the flow path. In lift-check valves, the disk comes in the form of a piston which is moved out of the path during upstream flow and returns by gravity to stop the flow. In case of ball valves, the disc is in the form of a ball.


Applications of Check Valves/ One-Directional Valves


These valves are generally installed in operations in which there are chances of total or partial shut-down of a compressor or pumps due to backflow of gases or liquids. So, these types of valves are most commonly found in gas systems and certain other applications where liquid flow has to be controlled.


This list is a necessary go-through before placing an order as it gives a complete insight of the utilities these valves can be put to:
  • Be careful while selecting the size as properly sized valves contributes to longer life of the valves, pumps, as well as other related components.
  • While an oversized valve could cause an early wear or failure of certain essential components, an undersized valve results in high loss in pressure, excessive noise, and even vibration.
  • They are essential for smooth operation of fluid pumping systems.
  • They can efficiently reduce Water Hammer condition that can badly damage pipes, Water hammer is caused due to pressure surge because of liquid forcing to stop suddenly while in motion.
  • A properly sized check valve guarantees to provide the prescribed flow while consuming minimal amount of energy which makes it truly cost and energy-efficient.
  • It is utmost important to keep a check on the valves for their size before being used for low flow applications. This will ensure that the valves are completely open on maximum fluid flow.
  • There are soft seats that offer bubble tight leakage control and the metal sealing surfaces permit some amount of leakage to seep through.

 At Evergreen Midwest, you will find a wide range of check valves. Please visit https://www.evergreenmidwest.com/check-valves.html to select a specific type that suits your requirements.

 Source - https://www.evergreenmidwest.com/blog/2017/08/28/all-you-should-know-about-check-valves/
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