Skip to main content

(NRV) Non-Return Valves | Check Valves - Symbol, Types and Importance

(NRV) Non Return Valve


A Non- Return Valves, check valve, clack valve, non- return valves, reflux valve, retention valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in one direction only.

non-return-valve-nrv

  
Non  - Return valve/ Check valve are two-port valves, meaning that they have two openings in the body, one to enter the fluid and the other to release the liquid.


non-return-valve-nrv-symbol

Types of (NRV) Non - Return Valves

There are various types of check valves/non-return valve used in a wide variety of applications.  Non- return valves are often part of common household items.  

Although they are available in a wide range of sizes and costs, Non - Return valve are generally very small, simple or inexpensive. Non - Return valve operate automatically and most are not controlled by an individual or any external control;  Accordingly, most have no valve handle or stem. The bodies (outer shells) of most  Non - Return valve/check valves are made of plastic or metal.

Importance Concepts in (NRV) Non - Return Valves

  An important concept in the Non - Return valve/check valve is the cracking pressure which is the minimum differential upstream pressure between the inlet and outlet at which the valve will operate.  Is usually designed for Non - Returnable valve/check valves and can therefore be specified for a specific cracking pressure.

  Heart valve are essentially inlet and outlet check valves for the ventricles of the heart, as the ventricles act as pumps.

Subscribe to learn more about Fire Engineering & Industrial Safety Management.

Thank you

Labels

Labels:

Comments

  1. valvesonly4 November 2020 at 10:41

    Thanks for shared that blog with us. If anyone here searching swing check valve manufacturer in usa then visit Valves Only.

    ReplyDelete
  2. valvesonly9 November 2020 at 17:54

    I wanted to thank you for this great Information and knowledge, I definitely loved every little bit of it. I have you bookmarked your web site to check out the latest stuff you post. Your blog is eye-catching. I get pleasure from it. Thanks for sharing this beautiful piece of writing with me, get more information at Top Entry ball valve manufacturer in USA for more Valves Only related information and knowledge.

    ReplyDelete

Post a Comment

Popular posts from this blog

100 Safety Topics for Daily Tool Box Talks

100 Safety Topics for Daily Tool Box Talks Certainly ! Toolbox talks are short, informal safety meetings held in the workplace to discuss relevant safety issues, hazards, and best practices. These talks play a crucial role in promoting safety and preventing accidents. Here are some safety topics for daily tool box talks. 100 safety topics for daily tool box talks Index of 100 Safety Topics for Daily Tool Box Talks What is Fire ? Classes of Fire Extinguishers Use of Fire Extinguishers Class 'D' Fire Extinguishers Pyrophoric iron fire Electrical area classification  Effects of Electric Shock  Work Permit System  Proper use of Portable Ladders  Checklist for you  Safety Attitude  Back Safety Hydrogen Sulphide Horseplay When a phone call can be fatal  Temporary Connection  Important Terminology Office Safety  Hazards of Hand Tools Hazards of Power Tools Your Hands PPE'S  Negligence Kills Prevent Eye Injury  Statics Electricity  Uns...
Post a Comment
Read more

10 HSE Interview Questions and Answers

10 HSE Interview Questions and Answers Health Safety Environment ( HSE ) related 10 interview questions and answers.  Q 1: WHAT IS WORK METHOD STATEMENT? Ans: A document showing the various methods through which a particular workis accomplished. It also provides a section for the safety measures for these activities. Q: 2: WHAT IS THE USE OF WORK METHOD STATEMENT? Ans: WMS describes the method in which a particular job is to be done. This can give complete awareness to the working crew. A JSA can be prepared based on the WMS. In fact, it helps to finish the job safety. Q3: WHAT IS A JSA AND ITS USE? Ans: Job Safety Analysis (JSA) is part of many existing accident preventionprograms. In generally, JSA breaks a job into basic steps and identifies the hazards associated with each step. It also prescribes controls for each hazard. The JSA has to be reviewed during the investigation if it has been conducted for the jobinvolved in an accident. If one is not available,...
Post a Comment
Read more