FAQ

Got Questions? We’ve Got Answers.

We understand the many questions that accompany selecting the right system for your project.  We’ve assembled some of the most commonly asked questions below.  Click on a box to reveal the answer to any question.

Can I connect an argon cylinder Regulator/Flowmeter to the pipeline outlet?

For safety reasons, the pipeline connection is different than the cylinder, and is rated at a lower maximum working pressure. The argon cylinder regulator/flow meter has a CGA 580 inlet connection, where as the pipeline connection for an argon regulator is CGA 034. In most instances, only a flow meter is used at the station drop outlet (“B” size outlet, 5/8” -18 CGA 032) with the pressure being maintained by the gas manifold.

Also, there is a performance issue when using the regulator/flow meter designed for high pressure cylinders. Normally the pipeline pressure is lower than what manufacturers require for the minimum inlet pressure to obtain the stated flow rate performance.

Can any type of cylinders be used on the fully automatic manifold?

Yes, the fully automatic manifold uses patented technology that gives you the flexibility to use either low pressure (Liquid dewers) or high pressure cylinders on each side or a combination of low and high pressure cylinders with the same control cabinet. This flexibility eliminates the requirement of using a separate manifold when wanting to use, or change to low and/or high pressure cylinders.

What is the difference between the industrial grade manifolds and specialty gas manifolds?

The materials used in the construction of Specialty gas manifolds have been upgraded to use diffusion resistant valves, pigtails, & regulators. Also, specialty gas regulators feature stainless steel diaphragms and have a helium leak rating. Brass regulator rating is 1 x 10-8 cc/sec., & for stainless steel, 1 x 10-9 cc/sec. The features of each system remain unchanged.

What is the ROI on an industrial gas system?

A: In general, an industrial application return on investment is 1 yr or less. In an application that uses 3-cylinders of gas per week, you can have a rapid payback of 1 year or less. Call to have us do a ROI analysis for you.

A secondary advantage of owning a manifold system in addition to the economical savings is increased safety by eliminating the handling of cylinders throughout the workplace.

What is the difference between medical and the other automatic manifolds?

Medical manifold systems are built with additional redundancy and failsafe features to ensure a continuous operation in the event of a component failure.

What is included with a gas system?

Our systems are complete with all items that you need to install the system and connect your cylinders to the pipeline. We also include the extras that will be needed for the installation to meet industry standards, such as cylinder racks/chains, and pipeline safety relief valve.

Can you customize a manifold for my application?

Precise Equipment has the flexibility to design systems for even the most unique applications.

What is the difference in the PDL and PDH series?

The PDL series is for use with low-pressure (Liquid dewers) cylinders, with a maximum inlet pressure rating of 500 psig. The PDH series is designed for using high pressure cylinders with a maximum inlet pressure of 3000 psig.

When do I need a Pipeline flashback arrester?

Based on the industry standards, the portion of the fuel gas system that is mixed with oxygen requires a pipeline flashback arrester.

You have different Mighty Pipe sizes, how do I choose what size is correct?

In figuring pipe size, the 3 things we consider are (1) how long the run is, (2) what pressure (PSIG) you will use in the pipeline, and (3) what is the flow rate (CFH) that you will be using . Give us a call and we will be happy to help you select the correct size for your application.

Can you use the Mighty Pipe with Oxygen?

The industry standards do not specify composite pipe as an acceptable material for pure oxygen service. Our recommendation is not to exceed 15% oxygen in an inert gas mix.

Who do I ask for if I have application or technical questions?

Call our toll free 800.795.8388 number and any of our system experts in sales or technical support will be happy to answer your questions.

Can I connect a regulator or hose directly to the pipeline?

The correct method that meets the industry standards is to use a station drop with single or multiple outs. Station drops are designed and manufactured to meet multiple industry pipeline outlet requirements such as shut-off valves, check valves, “B” size (Hose), or “C” size (Station regulators) outlet fittings, outlet fittings plugs or caps, condensation trap, and labeled for the particular gas service.

What are the differences between the fully automatics and the pressure differential automatics?

The fully automatic gas systems can be used with either low-pressure or high-pressure cylinders interchangeably. The more economical pressure differentials are designed to use a specific type of cylinder only.

The fully automatic has additional features such as 6-system status LED’s, digital pressure readout, and standby cylinder bank leak detection.

When using a combination of low & high pressure gas cylinders, or a micro bulk and high- pressure cylinders, the fully automatic can be prioritized to always use the low-pressure source first.

Pressure differential models are mechanical and do not require power to operate.

Does the “Gas Inlet Priority” switch need to be used on the fully automatic?

No, the default position is “None” (“FIFO” on earlier models) but, if using a combination of low and high pressure gas cylinders; the low pressure cylinders could be set to always be the primary supply (Prioritized side). The priority side (left or right) will always be either in-use or empty, but never be in standby mode.

Can I connect a cylinder regulator to the pipeline outlet?

For safety reasons, the pipeline regulator connection is a different connection than the cylinder and is rated at a lower maximum working pressure. As an example, a standard oxygen cylinder regulator has a CGA 540 inlet connection, and the industry standard for an oxygen pipeline regulator is CGA 024 (“C” size, 7/8”-14 RH), thus preventing the two regulators to be used interchangeably. For fuel gas, the pipeline regulator connection is CGA 025 (“C” size, 7/8”-14 LH).

Also, there is a lack of performance issue when using a cylinder regulator designed to operate with an inlet pressure greater than the normal pipeline pressure.

What standards do these gas systems meet?

All of Precise gas systems are manufactured to meet or exceed the standards & codes of the National Fire Protection Association (NFPA), Compressed Gas Association (CGA), American National Standards Institute (ANSI), Factory Mutual (FM), & other industry regulatory bodies with listed or approved components and assemblies. (UL, CE, CSA, EN, AS, & BAM)

What is the leak-detection feature and how does it work on the fully automatic gas systems?

The system stores the inlet pressure after it detects the change from empty status to standby status.  If the standby supply decreases pressure while in standby mode, a leak has been detected.   The front panel standby and empty LED’s will light to indicate the leak condition.  Once the leak has been stopped, the set button on the front panel is pressed to clear the condition and establish the new baseline.

Are there reverse flow check valves in the systems?

Yes, for the specialty gas and industrial series systems, check valves are built into each cylinder connection.  Medical systems have a check valve built into the header CGA adapter connection.

What happens if I do not reset handle after changing out empty cylinders on the PDH or PDL series gas systems?

Once the empty cylinders have been replaced, the manifold will revert back to flowing from the replenished bank and you will have a partial full standby reserve bank.  By flipping the lever to the in-use bank, prior to turning on the new full cylinders, allows the new full cylinders to become the standby reserve bank and the “What was in-use” to continue to be the primary supply.

Does the PDL Series have a gas saver circuit (Economizer)?

Yes, the gas saver will divert a small portion of the standby gas supply to the pipeline as the standby pressure builds over and above the in-use supply.

How far can I locate your remote alarm?

The remote alarms can be located up to several thousand feet from the manifold using low-voltage (12 VDC) AWG 20-22 wire.

What power requirements do the automatic manifolds need?

Fully automatic models use 120 VAC. Pressure differential do not require power to operate.

What happens if I lose power?

The medical manifolds have built-in failsafe feature to be normally open, so that the manifold will continue to delivery gas from both the primary and secondary supply without power.

Industrial and specialty gas manifolds will continue to flow from the right side gas supply.

What is the warranty period?

1-year from the date of manufacturing.

Where do I find the model identification information?

On automatic manifolds, the model and serial number numbers are located inside of the control cabinet.

What is the mechanical pressure gauge inside the fully automatics read.

The internal gauge is displaying the intermediate pressure going to the inlet of the delivery regulator. The final delivery pressure of the manifold is read on the LCD display with the pressure select switch in the “Del” position.

What does the mechanical pressure gauge inside the fully automatics measure?

The internal gauge is displaying the intermediate pressure going to the inlet of the delivery regulator. The final delivery pressure of the manifold is indicated on the LCD display with the pressure select switch in the center “Del” position.

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