Hello.
I aim to build a spunding valve, for use with 1-2 5 gallon corny fermenters. I see several options for the pressure control/relief part of the build, and am wondering about experiences with each:
1. A needle valve type, such as the petcock from my old pressure cooker (or a new $4.00 brass needle valve). I would adjust it to the desired pressure with the help of a pressure gauge. My concern is that it would bleed off to 0 psi, but haven't tested this.
2. McMaster p/n 48935k35 - 3/8 MIP - this apparently seals with a buna-n type seal, which hopefully would mitigate the loss of pressure others have seen with the 1/8" MIP size?
3. Mirro Canner "Jiggler" weight and vent pipe - these are used on pressure cookers to relieve at 5-10-15 psi . I don't know how it would function for this application. Anyone have experience here?
4. McMaster p/n 99045K11 plastic pressure-maintaining valve ($36.88).
I suspect option 4 will do the job well, based on others use. I am more curious if anyone can weigh in on Options 1-3, specifically if they can maintain 10 or 15 psi for a few weeks, for instance.
I aim to build a spunding valve, for use with 1-2 5 gallon corny fermenters. I see several options for the pressure control/relief part of the build, and am wondering about experiences with each:
1. A needle valve type, such as the petcock from my old pressure cooker (or a new $4.00 brass needle valve). I would adjust it to the desired pressure with the help of a pressure gauge. My concern is that it would bleed off to 0 psi, but haven't tested this.
2. McMaster p/n 48935k35 - 3/8 MIP - this apparently seals with a buna-n type seal, which hopefully would mitigate the loss of pressure others have seen with the 1/8" MIP size?
3. Mirro Canner "Jiggler" weight and vent pipe - these are used on pressure cookers to relieve at 5-10-15 psi . I don't know how it would function for this application. Anyone have experience here?
4. McMaster p/n 99045K11 plastic pressure-maintaining valve ($36.88).
I suspect option 4 will do the job well, based on others use. I am more curious if anyone can weigh in on Options 1-3, specifically if they can maintain 10 or 15 psi for a few weeks, for instance.