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PRESSURE RELIEF VALVE

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PRESSURE RELIEF VALVE RECOMMENDED
BY ROBERT WARREN IN THE CHARLES 803
CONSTRUCTION MANUAL

robert_prv.jpg
Photo Courtesey of Nanda Warren

< SOURCE : CHARLES 803 CONSTRUCTION MANUAL PAGE 30 >

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valve_assembly.jpg
All rights Reserved : Gilles Desormeaux

 
 
DETAIL OF VALVE,
SHOWING ALL PARTS
AND THEIR RELATIVE SIZE.
 
 
 
 
 
 
 
 
 
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valve_detail.jpg
All Rights Reserved : Gilles Desromeaux

 
VALVE WITH STEM REMOVED
PLACED ON EDGE TO SHOW
THE VITON 'O' RING        
 
 
 
 
 
 
 
 
 
 
 
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Pressure Relief ValveTest Rig
FOR THE BOILER VAPOUR OUTPUT PIPE 

test_rig_1.jpg

  • I BUILT THIS TEST RIG USING AN AUTOMATIC SELF INFLATING BLOOD PRESSURE MONITOR,
    • BRAND : LIFESOURCE
    • MODEL : UA-767
    • DIGITAL BLOOD PRESSURE MONITOR
  • TO BLOW AIR TO CRACK THE VALVE OPEN.  
  • THE MONITOR SHOWS THE PRESSURE IN MMHG,HERE THE VALVE OPENS AT 39 mm hg ( 39 TORR )
 
NOTE : THE PUMP IN THE BLOOD PRESSURE MONITOR PUMPS TO INFLATE THE ARM BAND.
  • BY DISCONNECTING THE TUBE
  • AND INSTALLING IT AT THE BASE OF THE CHECK VALVE,
  • THE PUMP BLOWS AIR THROUGH THE CHECK VALVE,
  •  CRACKING THE VALVE OPENED.
  • THE AMOUNT OF PRESSURE NEEDED TO OPEN THE VALVE IS INDICATED ON THE MONITOR DISPLAY.
  • THE PUMP WILL RUN FOR ABOUT 1 MINUTE THEN, THE UNIT WILL INDICATE A FAULT.  ( THE BAND IS MISSING )
  • TURN THE MONITOR  OFF AND ON AGAIN FOR AS MANY TESTS AS NEEDED. Gilles
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TO MAKE THE TEST RIG : 1-2-3

  1. USE AN AUTOMATIC SELF INFLATING BLOOD PRESSURE MONITOR ( THIS WILL NOT AFFECT YOUR MONITOR AND IT WILL REMAIN IN GOOD CONDITION, AFTER THE TESTS )
  2. UNPLUG THE TUBE FROM THE ARM BAND
  3. INSERT IT AT THE BASE OF THE CHECK VALVE, IN THE DIRECTION OF THE NORMAL FLOW OF THE LIQUID THROUGH THE VALVE.
  4. TAPE IT TO COMPLEATELY SEAL OFF ANY POTENTIAL AIR LEAKS.

THIS TEST RIG IS VERY ACCURATE AND SIMPLE ENOUGH TO USE,

 AND RELATIVELY INEXPENSIVE AS COMPARED TO A LAB SETUP.

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125.jpg
All Rights Reserved : Gilles Desromeaux

  • HERE I RISE THE PRESSURE
  • BY PRESSING ON THE VALVE SEAT
  • TO INCREASE ITS RESISTANCE TO 125 mm hg
  • THE EQUIVALENT RESISTANCE OF 2.5 Psi  (2.42 Psi)
  • THIS IS THE RECOMMENDED MAXIMUM PRESSURE FOR SAFE USE OF A STANDARD 55 GALLON DRUM 
 
 
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NOTE : 1 Psi = 51.72 mmhg  ( 1mmhg = 0.01934 Psi )
 
 

! SAFETY ! SAFETY ! SAFETY !

  • FOR SAFETY PUROSES
  • THIS PRESSURE SHOULD NEVER EXEED 2.5Psi
  • IT IS AMPLE PRESSURE FOR FEEDING ANY KIND OF MASH
  • AND IT WILL OPEN FREELY
  • WITHOUT AFFECTING THE SHAPE OF A REGULAR 55 GALLON DRUM.

  2006 Gilles Desormeaux