Steam Car Network
  • Home
  • About
    • Get Involved
    • Sponsors
  • Events
    • Upcoming Events
    • Past Events
  • Blog
  • Magazine
  • For Sale
  • Resources
    • Get And Give Help
    • Technical Articles
    • Steam Powered Cars
    • Links
  • Media
  • Contact
Picture

Technical Help

EVENTS
|
MAGAZINE
|
CARS & PARTS FOR SALE
|
WANTED CARS & PARTS
|
GET HELP
|
TECHNICAL ARTICLES
|
BLOG

HOW THE FUEL PRESSURE AUTOMATIC REGULATES FUEL PRESSURE

9/22/2016

 

At the top of the fuel pressure automatic is a copper disk or diaphragm.  This diaphragm is clamped between the two halves of the shell of the fuel pressure automatic (461 & 462).  The underside of the disk rests against a washer (468) which helps to keep the heavy spring (466) centered while fuel pressure is admitted to the top side of the disk.  An adjusting screw (464) and washer (467) allows for the spring tension against the disk to be set such that the diaphragm doesn't start moving and compressing the spring until the fuel pressure reaches 140 the required pressure.
Mounted to the opposite side of the disk is the valve stem (465) which follows the position of the diaphragm.  The valve body is an integral part of the fuel pressure automatic's shell (462) as shown in the diagram. The fuel used  from the main burner pressure tanks is piped to the right port of the burner fuel automatic.  A line connected to the burner (main) fuel tank is connected to the port at the top of the fuel pressure automatic.
Normally the valve stem (465) is pressed tight against the valve seat (462) and no fuel passes from the right port through to the left port.  When the fuel pressure exceeds the set pressure (the normal set-point of the fuel pressure automatic) the diaphragm overcomes the spring force against it and it moves slightly (down in the diagram) to compress the spring (466).  As this motion happens the valve stem (465) moves off the valve seat (462) opening up the passage between the right port going to the fuel pressure tanks and the main fuel tank.  This action allows fuel to flow back to the tank and for the system pressure to be maintained at the set pressure.
When the fuel pressure pressure drops the spring force overcomes the fuel pressure acting on the disk and the diaphragm moves such that the valve stem (465) returns to being seated and thus fuel will not pass though the automatic.  During normal operation the majority of the fuel pumped by the power fuel pump is returned through the fuel pressure automatic to the fuel supply tank.
When the hand fuel pump is used the fuel pressure automatic also limits fuel pressure. 
Picture
0 Comments



Leave a Reply.

    Picture
    For instructions on how to add to our community's blog post, please visit our Get Involved page by clicking on the link above!
    Ask for help

    Archives

    February 2021
    December 2020
    July 2020
    June 2020
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    March 2019
    May 2018
    December 2017
    September 2017
    May 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    December 2015
    March 2015

    Categories

    All
    Boiler
    Bulkhead Piping
    Model K
    Oil
    Stanley Breaks
    Steam Generators
    Steam Motors

    RSS Feed

Home
About
Blog
​Events
Classifieds
Resources
​Contact
Steam Car Network functions as a resource for all steam car and steam bike enthusiasts. The website is constantly updated with articles, events, and informative posts to keep the community alive and growing. Feel free to contact us if you have any questions or concerns at the email address below and we will promptly reply. 

​team@steamcarnetwork.com
Picture
  • Home
  • About
    • Get Involved
    • Sponsors
  • Events
    • Upcoming Events
    • Past Events
  • Blog
  • Magazine
  • For Sale
  • Resources
    • Get And Give Help
    • Technical Articles
    • Steam Powered Cars
    • Links
  • Media
  • Contact