Nuvair manufacturers low pressure breathing air systems for the working diver. There are many choices and configurations that these low pressure breathing systems can be purchased in. Also, there are choices on the type, brand and model of compressor being used. The commercial compressors can be broken down into three categories, Light Duty Commercial, Medium Duty Commercial and Heavy Duty Commercial. In the couple of pages we will guide you through the different machines with some of the options available.

Custom Build Your Compressor:

The first choice will be the size or output of the compressor. What CFM or LPM air output will be required to supply the diver(s) that will use the compressor?

The minimum pressure requirement can be calculated as maximum depth pressure plus 100 psi. This would be a minimum pressure. CFM calculations normally are done for a demand helmet at (3 x # divers) x (depth + 33)/33 =cfm and for a free flow helmet (4.5 x # divers) x (depth +33)/33=cfm (1 CFM = 28.3 LPM).

The second choice is the type of compressor used to pump the air. The choices are reciprocating (piston) or rotary screw. Traditionally the reciprocating has been used due to lower oil “mist” carry over. The newer Rotary Screw compressors also have very low oil carry over and require little maintenance. In the reciprocating category for small sizes there is a choice of oil lubricated or oil-less. For shallow work the light oil-less can offer some advantages. For the deeper water the oil lubricated is going to be more reliable at higher pressure ratings and require less maintenance. Another recommendation for deeper water is a two stage pressure lubricated compressor with even higher pressure output.

The third choice will be the type of engine that is used to turn the compressor. The choices from Nuvair are gas, diesel, electric or hydraulic. Electric is available in any voltage or Hz required. For multinational companies 50/60Hz compressors are available. We also offer diesel/electric combo packages where the compressor can be run by electric when available or diesel when electric is not available.

The fourth choice is the type of frame that is used. Each frame type has advantages and disadvantages. Choose the frame that will be best for the type of job and place it will be used.

Examples of Compressor Blocks and Output
Please Click on the Quincy or Champion Image to Open Specifications
For information on the Rotair RVK please contact us.

Quincy 325 19 CFM	Quincy 5120 95 CFM	Champion R15 23 CFM	Champion R30 49 CFM	Rotair RVK Rotary Screw

Light Duty Compressors

Our light duty commercial compressors are ideal for shallow work areas in depths of 20 ft. or less. Lightweight, low cost and portability are the main reasons for choosing a light duty compressor. You can choose between oil free or oil lubricated compressor. The oil free designs are light and easy to move around and do not require some of the options necessary with oil lubricated compressors to meet OSHA Regulations. Diver air filtration does not come standard with our light duty compressors and is an important option to discuss and make sure you have on any breathing air compressor system.

One final consideration when purchasing a light duty compressor would be your planned use. If you plan to use the compressor for continuous duty work or have multiple divers in the water it will be important to get a compressor that meets the demands of the CFM and pressure you will need. As always give us call and we will guide you through the decision process and be sure your purchase meets your requirements.

Specifications	NV550H	NV400 HST
Air Delivery	12 CFM at 100 PSI	5.1 CFM at 100 PSI
Air Tank Capacity	7 Gallons	4 Gallons
Unit Dimensions (H x W x D)	59" x 110" x 46" 23 x 43 x 18 cm	49" x 51" x 49" 19 x 20 x 19 cm
Weight	96 lbs	70 lbs
Compressor Type	Oil-less Compressor, Perma-Lube Design

ABAC (12 CFM)

ABAC (12-16 CFM)

LP R15 (20 CFM)

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Medium Duty Compressors

Medium duty compressors range from 18 cfm to 50cfm and come in standardized and customized configurations. You can choose from a wide range of compressors and motors to meet your specific needs. Portability and CFM air requirements are two factors to consider in choosing the right medium duty compressor for your job. We have built a few versatile packages based on our experience and are happy to customize these or start from the ground up for your job requirements.

Your choice will depend on where you will use it and what equipment it will be used with. Our medium duty range is available in gas, diesel, hydraulic or electric. In electric the motors are available for any voltage or Hz that you may require. Three phase models are available in 50 or 60Hz or both 50/60Hz. Our frames include a belt guard and are made with 6061 aluminum, steel, or if preferred stainless steel. The compressor plates are made with 316 SS or steel. A drip pan is included on most models and optional for those without. Smaller Packages are set up to have handles, wheels and a lifting eye. While larger packages tend to be constructed of aluminum frame material with four lifting eyes and forklift slots for transporting. Volume tanks and diver air filtration options should also be considered when customizing your compressor package.

These frame styles can be configured to have room for a volume tank and proper filtration for the diver. Additionally we can enclose the volume tank in a separate frame depending on your space and transportation needs. Notice: The volume tank is always on the opposite side of the engine exhaust.

The frame style pictured below has room for a 30 gallon volume tank and the proper filtration for the diver. The diesel in the picture is a Kholer and the compressor is a Champion. The frame can be purchased with almost any diesel or any compressor that is wanted. Lifting eyes and a bottom “drip” pan are added options. The frame is made with 6061 Aluminum and the compressor plate is 316 SS. Notice: The volume tank is always on the opposite side of the engine exhaust.

R15 Kholer with Volume Tank

R15 Honda Gas with Volume Tank (23 CFM)

The frame style pictured below requires a remote volume tank, Nuvair’s Stand Alone Volume Tanks have been built in accordance with the ASME, ABS, USCG, UN, SAE-J10 and others. Nuvair caries a variety of sizes from 24 - 400 gallons. Volume Tanks are available in a vertical or horizontal with or without frames.

R15 Electric

	Champion R15 with Yanmar Diesel Engine Electric start Yanmar diesel, with Champion R15 pump, mounted on a stainless steel compressor plate with a heavy duty aluminum frame. The frame has lifting eyes and raised feet to make a fork lifting slot. Always use an additional volume tank with filtration before the air is delivered to the divers.
Quincy 325 with Yanmar Diesel Engine Quincy 325, pressure lubricated compressor, loadless start with head unloaders. This package has a 1 gallon surge tank, over pressure valve, drain valve, large air after cooler, check valve, gate valves and plumbing. The Yanmar 10hp diesel engine features key electric start or pull start, Tach/Hour meter and battery box. This frame is made with 6061 aluminum and has an enclosed bottom, center lifting eye, handles and wheels making it easy to wheel on and off the job. All equipment is inset, compressor and diesel have independent vibration absorption mounts and are mounted on an aluminum plate. Dimensions: 43" x 48" x 28" (H x L x W) Weight: 495 lbs
Quincy 370 with 28 hp Kohler Diesel Engine
Industry leader Quincy 370 Low Pressure Compressor, loadless start with head unloaders. The Kohler 28.5hp diesel engine features electric start, Tach/Hour meter, battery with battery box, 10 gallon fuel tank with sight gauge and filter. This package has a 3 gallon surge tank with 3 diver manifold, over pressure valve, drain valve, large air after cooler, check valve, gate valves and plumbing. The frame is made with 6061 aluminum, lifting eyes, forklift slots and enclosed bottom, steel powder coated compressor plate. All equipment is inset; compressor and diesel have independent vibration absorption mounts and are mounted on a steel plate. Dimensions: 44" x 60" x 35" (H x L x W) Weight: 1030 lbs
Quincy 370 and 390 Available in tank or base mount mount electric
Industry leader Quincy 370 and 390 Low Pressure Compressors paired with a quality electric motor and 3 stage diver air filtration are designed to be simple to operate and reliable. This package has a 120 gallon Volume tank with 3 diver manifold, over pressure valve, drain valve, large air after cooler, check valve, gate valves and plumbing. Both packages come with forklift slots and your choice of standard or grasshopper tank. Steel powder coated compressor plate and tank. CFM: Q370 = 49.30 @ 175 PSI and Q390 = 64 @ 175 PSI

Heavy Duty Compressors

Heavy duty compressor packages range from 50cfm and up. Above 100cfm the compressors used will be rotary screw. Our standard packages are built around the industry leading Quincy 5120 air compressor. Power options included can be either diesel or electric in any three phase voltage required.

Our entire heavy duty compressor package line is made of steel with a powder coated surface. Standard build includes: forklift slots, four point lifting eyes, belt guard, and drip pan. Options available: size of volume tank, size of fuel tank, top cover plate, canvas cover and galvanized dipped.

Configurations for base mounted compressor with no frame are also available. These packages can be purchased with almost any compressor and with any type of drive engine required. The base mounted compressors can also be purchased as a “tank” mounted compressor and is available with any compressor and any drive source that is wanted. Larger compressors, gas and diesel powered compressors will be mounted on a grasshopper tank.

Base mounted compressor with no frame. This package can be purchased with almost any compressor and with any type of drive engine required. The base mounted compressor can also be purchased as a “tank” mounted compressor and is available with any compressor and any drive source that is wanted. Larger compressors, gas and diesel powered compressor will be mounted on a grasshopper tank.

Base Mounted Compressor	Tank Mounted Compressor
Framed Compressor	Optional Framed Compressor Cover

Please contact us for more information or to place your order.
Nuvair LP Compressor Brochure