You’ve decided that a rotary screw compressor system is the right choice for your application; maybe you are converting from using reciprocating compressors. When installing your new compressor you’ll need to locate a few different components and plumb hosing between them. In this article, we’ll briefly explain the functions of the components of a rotary screw compressor system. Continue reading “Components of your VMAC mobile rotary screw air compressor system”
The only air compressor specifically engineered for commercial vans – VMAC UNDERHOOD 40 – Van Series
If vehicle weight is a concern, and commercial van payload is limited, you can now choose equipment that not only reduces vehicle weight, but also frees up space, maximizes operator productivity, and eliminates common safety issues. Continue reading “Air Compressor Options Available for Service Vans”
The Buck (moisture) Stops Here!
Like all compressed air drying systems, each design has its abilities and its limitations. Continue reading “Membrane Type Dryer”
Commercial van weight can have significant impacts on any service truck business, especially in the United States. Heavy vans have to follow tighter regulations, undergo more inspections, and can face costly fines in some jurisdictions. Let’s break down what you need to know about weight and why extra weight on commercial vans can be a big problem.
What is GVWR?
Commercial van gross vehicle weight ratings (GVWR) and payloads can differ from vehicle to vehicle. It is important to know what you’re working with when specifying or upfitting a specific commercial van.
According to AboutAutos.com, gross vehicle weight rating is the vehicle’s maximum safe weight that should not be exceeded. Weight calculations include curb weight, additional equipment that’s been added, the weight of cargo and the weight of passengers. A vehicle’s GVWR never changes.
GVWR vs. Payload
GVWR should not to be confused with payload capacity. GVWR includes the vehicle’s unloaded curb weight, passengers’ weight and cargo weight. Payload capacity is the difference between GVWR and vehicle weight. For example: If a vehicle’s GVWR is listed at 10,000 lb and the vehicle’s weight is 6,000 lb (empty), then its payload capacity is 4,000 lb.
|Make & Model (Highest Capacity Model)||GVWR (Maximum)*||Payload (Maximum)*|
|RAM Promaster||11,500 lb||4,680 lb|
|RAM Promaster City||5,395 lb||1,901 lb|
|Ford Transit||10,360 lb||4,640 lb|
|Ford Transit Connect||5,302 lb||1,610 lb|
|MB/Freightliner Sprinter||12,125 lb||6,768 lb|
|MB Metris||6,614 lb||2,425 lb|
|Nissan NV||9,900 lb||3,850 lb|
|Nissan NV200||4772 lb||1,480 lb|
|Chevrolet Express||9,600 lb||3,841 lb|
|*Values are estimates only, based on basic trim package and referred from vehicle manufacturer websites. For accurate technical specifications, refer directly to vehicle manufacturer documentation.|
FMCSA Regulations Apply Over 10,000 lb
All commercial drivers of vehicles that perform interstate work in the USA and have a gross vehicle weight rating of 10,001 lb or more are required to follow Federal Motor Carrier Safety Administration (FMCSA) regulations. These regulations are enforced by the Department of Transportation (DOT), and are outlined in Title 49, Part 300 to 399 of the Code of Federal Regulations—an exhausting 734-page document of rules that must be followed.
FMCSA has many regulations for overweight commercial vans. For example, interstate drivers must:
- Be at least 21 years old
- Possess a DOT Medical Examiner certificate
- Obtain and display a USDOT number
- Follow Hours of Service requirements
- Maintain proper records
- Pre- and post-trip inspections
- Accident reports
- Vehicle maintenance records
- Receive an annual inspection
- And more…
Individual states set their own intrastate commercial vehicle regulations, but these regulations tend to be similar to the interstate guidelines. For example, 37 states require a DOT Medical Examiner certificate, while most include reporting, inspection, accident recording, and hours of service rules.
For many operators, the easiest way to avoid the hassle and paperwork of FMCSA regulations is to ensure their vehicle has a GVWR that is consistently under 10,000 lb. While most commercial vans fall into this category, the Ford Transit, RAM Promaster, and Mercedes-Benz Freightliner Sprinter each have a GVWR of over 10,000 lbs.
Fines For Overweight Vans
Overweight vans can also result in hefty fines. According to Texas Department of Motor Vehicles, fines for on-the-road weight violations range from $100 to $10,000 for first offence. Fines double on subsequent violations within a year. Fines and other punishments vary in severity from state-to-state, and can even include prison time.
According to Connecticut General Assembly, criminal charges may be brought against the owner or operator of an overweight vehicle if the weight of the vehicle is the proximate cause of a motor vehicle accident that results in death.
Summary of GVWR Issues
To recap the issues and most important information surrounding GVWR:
- GVWR never changes.
- Additional regulations apply for vans over 10,000 lb.
- Inspections, driver requirements, record keeping, and more.
- Monetary fines may be imposed.
- Prison time and criminal charges are possible.
- Business operations will likely be affected.
With these important issues in mind, it makes sense to reduce the weight of vans by purchasing low-weight vehicles and incorporating the lightest components possible.
Air Compressor Solutions for Reducing Van Weight
Service vans that require compressed air for pneumatic tools can reduce weight by using UNDERHOOD™ air compressors. Traditional air compressors mounted in the cargo area can weigh as much as 375 lb., while the UNDERHOOD™ rotary screw air compressor weighs only 85 lbs. This system increases the available payload by up to 290 lbs.
UNDERHOOD™ is the only air compressor specifically engineered for commercial vans. These 40 CFM rotary screw compressor systems by VMAC are available for the most popular commercial van models. For further benefits of weight savings in vans, check out VMAC’s previous article “Air power: Just why does air matter to commercial van operators”.
You may also like:
- How The Right Commercial Van Protects Your Profits
- Top 5 Challenges Caused By Overweight Heavy-Duty Pickup Trucks
Heaterless Type (Pressure Swing Dryers)
Dual tower desiccant air dryers are used to produce dewpoint temperatures below the freezing point of water, as well as reduce the moisture content of compressed air used in critical process applications. Typical dewpoints produced by these types of dryers are -40° F to -100° F, although lower dewpoints are possible. Continue reading “What are Dual Tower Regenerative Desiccant Air Dryers (and how do they work?)”
Protect your engine, turn off your fuel
You just finished a job using your gas drive air compressor and you’re getting ready to drive to your next job. Did you remember to shut off your fuel valve? In this article we’ll explain why you should.
Most small gas engines have a fuel valve that should be shut off by when the engine is not in use. This can be easy to forget, especially when using remote controls.
Fuel shut-off becomes important when moving equipment as vibration can cause the carburetor needle valve to move allowing fuel to trickle into the carburetor, the float chamber and down the intake valve. This can cause:
- Engine flood, causing downtime waiting for the flood to clear.
- Dilution, when fuel goes past piston rings and mixes with oil, causing engine damage.
- Hydraulic lock, when incompressible liquid causes engine damage or failure.
Best practice for small gas engines – ensure equipment is on level ground, and the fuel valve is shut off when re-fueling and when equipment is not in use.
Why does the engine flood?
Any time vibration causes the carburetor float to drop in the float chamber, pressure is reduced against the needle valve. Reduced pressure against the needle valve allows pressurized fuel from the fuel tank to pass through the valve.
If this happens frequently, fuel will overfill the float chamber, flood down the throat of the carburetor, and flow into the cylinder through the open intake valve.
Fuel in the cylinder can flood the combustion chamber above the piston, creating hydraulic lock, preventing the engine from turning. This fuel will also slowly drain past the piston rings, diluting the oil in the crank case. If the engine manages to start with diluted oil, severe and premature engine damage will follow.
How does the float work?
The float chamber is located below the carburetor body. Through the operation of the float and the needle valve, the float chamber maintains a constant fuel level while the engine is working. The fuel flows from the tank into the float chamber through the needle valve. When the fuel rises to a specific level, the float rises. When the buoyancy of the float is balanced with the fuel pressure, the needle valve shuts off the fuel passage, thereby maintaining the fuel at the predetermined level.
Any other reasons?
Not only does shutting off the fuel valve prevent the engine from flooding while being transported, it prevents flooding because of contamination in the float valve, and extends the life of the float valve by decreasing pressure on it.
Is this unique to Honda engines?
Most manufacturers of small gas engines have this same issue. Like the Honda engines used in VMAC G30 Gas Drive Air Compressors, Subaru and Kohler engines used in other air compressor brands state in their literature that fuel valves should be shut off when not in use, including during transport.
VMAC G30 Gas Drive Air Compressors are powered by Honda’s GX390 air cooled 4-stroke engine. The G30 is a Honda-approved application. The engine includes electric start capability, is EPA and CARB-compliant, and comes with Honda’s 3-year warranty.
Do you have questions about VMAC’s G30 Gas Drive Air Compressor? Please give us a call at 1 888 514 6656 or email us at sal[email protected].
If you have any questions about this article or anything mobile compressor related, please contact us.