Reduce pressure from high pressure receiver to low pressure receiver

Click For Summary

Discussion Overview

The discussion revolves around methods to reduce pressure from a high-pressure receiver to a low-pressure receiver, specifically within the range of 0 to 10 bar. Participants explore various types of valves and mechanisms that could facilitate this pressure reduction.

Discussion Character

  • Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant inquires about the appropriate method to reduce pressure from a high-pressure receiver to a low-pressure receiver, asking if a specific valve can be used for this task.
  • Another participant suggests a design involving a proportioning valve that adjusts based on pressure differences, describing its operation in detail.
  • A participant questions whether a hand valve can effectively reduce pressure from 5 bar to 1 bar without a spring regulator, seeking clarification on its functionality.
  • There is a mention of a regulator that maintains a constant output pressure regardless of input pressure, indicating a potential solution for pressure control.
  • A participant asks if a hand valve can achieve the desired pressure drop if the outlet flow is significantly reduced compared to the inlet flow.
  • One participant asserts that closing the valve completely can reduce the output pressure to zero, introducing a discussion about the implications of valve operation.
  • Another participant queries the effects of gradually closing the valve on output pressure and flow, prompting further exploration of valve dynamics.
  • It is noted that the output pressure and flow will reduce gradually as the valve is closed incrementally.

Areas of Agreement / Disagreement

Participants express varying views on the effectiveness of different valve types for pressure reduction, and there is no consensus on the best approach. Some participants propose specific mechanisms while others question their efficacy under certain conditions.

Contextual Notes

Discussions include assumptions about flow rates and the operational characteristics of valves, but these factors remain unresolved and depend on specific system configurations.

Who May Find This Useful

Individuals interested in fluid dynamics, valve design, and pressure control systems may find this discussion relevant.

y2j
Messages
50
Reaction score
0
if one want to reduce pressure from high pressure receiver to low pressure receiver for example in the range of (0 to 10 bar) what he must to do?
any valve can use it for this task?
 
Engineering news on Phys.org
Is this what you need?
http://www.hydroprocess.fr/images/amplification-pression.jpg​

If you need to keep the same fluid on both side, it can be transformed into a proportioning valve by putting a hole through the piston and a metering valve at the inlet (in orange) like this:

reduction-pression.jpg

Every time P2 increases, it pushes the piston and opens the metering valve. As the pressure P1 builds up, it moves the piston back and closes the metering valve. A greater P2 needs to be created to open it again and increase P1 again (which is always smaller than P2 according to the diameter ratio). Brake systems use a similar valve, except that there is a spring acting on the piston (in the white zone) such that the pressure ratio is 1:1 up to a threshold pressure and then the proportioning starts once P1 X S1 is greater than P2 X s2 plus the spring force, which give an output as shown below (the valve shown can adjust the spring preload with the lever and thus change the threshold pressure):

tilton-lever-type-proportioning-valve.jpg
 
Last edited by a moderator:
  • Like
Likes   Reactions: y2j
thanks
if I use a hand valve it could reduce pressure from (5 bar) to (1bar) (hand valve only not contain a spring regulator)?
Is this true ?
 
http://www.advancevalves.com/large-size-balancing-valve.aspx. A regulator keeps a constant output pressure no matter the input pressure as shown below.

?u=http%3A%2F%2Fwww.senninger.com%2Fwordpress%2Fwp-content%2Fuploads%2F2010%2F05%2FAccuracy4.jpg
 
  • Like
Likes   Reactions: y2j
OK my sir thanks again
Is hand valve can yield this pressure drop (5bar ) to (1bar) if the outlet flow is reduced to a very small amount comparing with that at inlet?
 
If you close the valve completely, you can reduce the output pressure to zero!
 
  • Like
Likes   Reactions: y2j
if closing the valve occurs gradually what happen ?
 
The output pressure (and flow) reduces gradually.
 
  • Like
Likes   Reactions: y2j

Similar threads

Replies
2
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
Replies
2
Views
2K
Replies
1
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
18
Views
3K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 8 ·
Replies
8
Views
3K
Replies
2
Views
2K