4/14/2009 - These will now be sold on an individual basis...still more available!!!. $60 for local pick-up $80 shipped for long distance or out of state buyers
Send pm or email me at
rockroomreg@yahoo.com
I purchased one of these regulators from a guy locally and wanted to pass the deal along to fellow reefers. These are used medical grade regulators that are in great condition. The regulators come with all the fittings in order to convert them for aquarium use. These are high grade Victor regulators that are extremely expensive new. The nice fact about 2 stage regulators is that a constant pressure is maintained even while the co2 tank empties. All aquarium regulators are single stage and most of us know how annoying bubble count adjustments can be a pain. These regulators are serious pieces of equipment and make the common aquarium regulators look like toys.
Here is a pic of mine:
These regulators will require a post body kit that will include an electronic solenoid, needle valve, check valve, and bubble counter. I have have a deal on this site for $55:
http://oregonaquadesign.vstore.ca/pr...e/co2-co2-kits
Victor HPT270B-250
High Purity 2 Stage Regulators.
These Regulators are recommended for the delivery of noncorrosive high purity gases and calibration mixtures used in gas chromatography and other sensitive laboratory equipment. They offer maximum control of delivery pressure regardless of fluctuations in cylinder pressure. Both diaphragms are stainless steel, which will not contaminate the gas stream and are highly resistant to inboard diffusion of atmospheric contaminants.
Features:
• Pure- Stainless steel diaphragms offer resistance to inboard diffusion of contaminants.
• Dependable- Kel-F seats and double inlet filtering offer longer life with less maintenance.
• Safe- External self-reseating relief valve provides maximum regulator protection.
• Durable- All components are chrome-plated giving long lasting durability and attractive appearance.
There is a lot of info in this link and they actually started a ‘pimp’ club:
http://www.plantedtank.net/forums/eq...pimp-club.html
What is the difference between the Single Stage and Two Stage Gas Regulator?
Gas pressure regulators are used to reduce the pressure of gas supplied from a high-pressure cylinder of gas to a workable level that can be safely used for operating equipment and instruments. There are two basic types of gas pressure regulators: single-stage and two-stage.
Single-stage pressure regulators reduce the cylinder pressure to the delivery or outlet pressure in one step. Two-stage pressure regulators reduce the cylinder pressure to a working level in two steps. Since the performance of each is influenced by mechanical characteristics, the choice of gas regulator depends on the type of application for which it is intended.
The two most important parameters to be considered are droop and supply pressure effect.
Droop is the difference in delivery pressure between zero flow conditions and the gas regulator's maximum flow capacity. [Supply pressure effect is the variation in delivery pressure as supply pressure decreases while the cylinder empties. For most regulators, a decrease in inlet pressure causes the delivery pressure to increase.
The effect of these differences on performance can be illustrated with some examples. For instance, when a centralized gas delivery system is supplying a number of different chromatographs, flow rates are apt to be fairly constant. Supply pressure variations, however, may be abrupt especially when automatic changeover manifolds are used. In this scenario, a two-stage regulator with a narrow accuracy envelope (supply pressure effect) and a relatively steep droop should be used to avoid a baseline shift on the chromatographs.
Single-stage and two-stage gas regulators have different droop characteristics and respond differently to changing supply pressure. The single-stage regulator shows little droop with varying flow rates, but a relatively large supply pressure effect. Conversely, the two-stage regulator shows a steeper slope in droop but only small supply pressure effects.
On the other hand, if gas is being used for a short duration instrument calibration, a single-stage gas regulator with a wide accuracy envelope (supply pressure effect) but a comparatively flat droop should be chosen. This will eliminate the need to allow the gas to flow at a constant rate before the calibration can be done.
Connect with Facebook
Linear Mode
