6000# needle valve
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > DIY


Reply
 
Thread Tools Display Modes
Old 02-19-2015, 12:49 PM   #1
adamfish
Algae Grower
 
PTrader: (0/0%)
Join Date: Feb 2015
Location: saskatchewan
Posts: 65
Default

6000# needle valve


Anyone try a heavy duty needle valve on their co2 without a regulator?
adamfish is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 02-20-2015, 01:09 PM   #2
adamfish
Algae Grower
 
PTrader: (0/0%)
Join Date: Feb 2015
Location: saskatchewan
Posts: 65
Default

Nobody buys a needle valve rated for 1000+ psi? Those watts are like what, around 300?
adamfish is offline   Reply With Quote Quick reply to this message
Old 02-20-2015, 01:22 PM   #3
jeffkrol
Planted Tank Guru
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: WI
Posts: 2,930
Default

Quote:
Originally Posted by adamfish View Post
Nobody buys a needle valve rated for 1000+ psi? Those watts are like what, around 300?
Needle valves.. or more correctly metering valves are more complicated than you think. There are more stats than just psi.. Needle valve orifice and gas flow parameters come into play..
Even in the 1300 series a 1 degree needle is better than a 3 degree neddle

You need precise flow not just bull work..

http://catalog.hoke.com/Asset/Meteri...g-79013ENG.pdf

The Hoke millimite and micro-mite series both have a high pressure rating 3000psi AND the small orifice needed.

The 2300 is already too big for any decent control.. esp w/ out a regulator..

Tavern and bar supply shops should have a fairly cheap 1 stage reg . Add a precision needle valve and all the fittings you are good to go..

Bottom line, a needle valve is not just a needle valve. They are pretty specific for our low volume high-ish pressure work..
I don't see any good coming from bypassing a regulator to regulate the gas supply..First you control the pressure then the supply volume..an unavoidable 2 step process..
__________________
"A man with a watch knows what time it is. A man with two watches is never sure."
jeffkrol is offline   Reply With Quote Quick reply to this message
Old 02-20-2015, 02:15 PM   #4
adamfish
Algae Grower
 
PTrader: (0/0%)
Join Date: Feb 2015
Location: saskatchewan
Posts: 65
Default

I just figured you'd have more turns of the needle hence better control, but I see there's no way around a regulator, guess I'll have to bite the bullet.
adamfish is offline   Reply With Quote Quick reply to this message
Old 02-21-2015, 02:36 AM   #5
tribologist
Algae Grower
 
PTrader: (0/0%)
Join Date: Jan 2009
Location: Hartford, Ct
Posts: 5
Default

It would be very difficult to get the flow under control with that high pressure over the valve. Needle valves with high pressure ratings are not necessarily used to create a small flow with a high inlet pressure and a low outlet pressure but rather to control flow when the pressure is high on both sides of the valve.

I use a 2000psig (low pressure :-) Swagelok S series 1 deg needle valve I pulled out of the trash at work but I only need to open it a few turns when I have the regulator set to 25psig even though the needle is the smallest taper they make. A regulator is only $20-30 on craigslist. Any old welding regulator will work. The magnetic valve is harder to find really cheap but you can find them on [Ebay Link Removed] The valves used in MIG or TIG welders will work fine.

Ulf
tribologist is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 12:07 PM.


Powered by vBulletin®
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012