MLETC Stainless Steel Engine Throttle Controller

mletc stainless steel engine throttle controller

MLETC Stainless Steel Engine Throttle Controller

We are excited to share we now stock the MLETC Stainless Steel Engine Throttle Controller in inventory. This engine throttle controller is designed to control the speed of an engine or the flow of fuel in an engine, or to hold down or choke. The throttle is for a device to control how fuel moves through an engine. This throttle is Stainless Steel 40” Cable with 3/8” fitting size – 0.28” – 0.55” Adjustable Stoke, and rated at 7,250 PSI and 320° F.

See the brass and stainless steel MLETC engine throttle controller.More information or add it to your quote.

AR North America Returns to CETA / ISSA Interclean Show 2016


CETA / ISSA Interclean show chicago 2016

AR North America returns to CETA / ISSA INTERCLEAN in Chicago October 25-28, 2016 at McCormick Place South Hall booth 3645. We plan to have our Annovi Reverberi triplex plunger, diaphragm pumps, AR Blue Clean pressure washers and related accessories. Stop by to learn why AR enjoy’s a major presence in cleaning sector thanks to its high pressure piston plunger pumps for industrial washing for both private and professional use. AR also is also a world’s leading manufacturer of diaphragm pumps for agriculture use. We represent pioneering solutions in the global market.

We are also excited to sponsor the CETA’s Opening Reception this year ideal for those wanting to relax and socialize and just have fun in the very room that served as Bruce Wayne’s apartment in the film “The Dark Knight”. Walk the red carpet, have your picture taken then enjoy all the fun!

For more information or to register visit Make sure and come see us in booth 3645

Annovi Reverberi Canada

Looking for Annovi Reverberi Canada? AR North America is the independently operated division of Annovi Reverberi (AR) you should contact for all of your high pressure plunger, diaphragm, vacuum pumps and AR Blue Clean electric pressure washer needs.  We have been proudly servicing our Annovi Reverberi Canada clients since 1992.

Annovi Reverberi Canada Sales & Service Dealers

If you are not looking to buy in larger qualities directly from us you should know we also maintain 17 authorized service dealers that sell and service.  Our service dealers are spread throughout providences in Canada including:  Alberta British, Columbia, Northwest Territories, Nunavut, Ontario, Quebec, and Yukon.   If you are looking for a dealer we product lines remain the

AR Blue Clean

If  you own a AR Blue Clean pressure washer  and have service request or question we kindly suggest you visit and Customer Care page.  Find troubleshooting tips, FAQs, warranty information, contacts and more.

Give us or our authorized service dealers the opportunity to show you why Annovi Reverberi is the first choice when quality matters.

Announcing Battioni Pagani Rotary Vane Vacuum Pumps

Battioni Pagani Rotary Vane Vacuum Pumps

AR North America officially announces MEC, Ballast and WTP Battioni Pagani rotary vane vacuum pumps to our catalog. Battioni Pagani Pompe has 60 years of experience manufacturing rotary vane vacuum pumps to the highest quality standards. Annovi Reverberi our parent company in Italy has been a Battioni Pagani rotary vacuum pump partner for many years. It was a logical next step that we become a preferred distributor for North America.

Battioni Pagani rotary vane vacuum pumps handle the most demanding needs for agricultural fertilizing irrigation, oil field use, septic waste, empty cesspools, industrial waste, chemical waste, byproduct waste, and manufacturing.

AR North America proudly carries the following Battioni Pagani rotary vane vacuum pumps.

  • MEC series 2000, 4000, 5000, 6500 and 8000 from 726 GPM – 2,139 GPM and 97 CFM to 286 CFM
  • Ballast series 9,000, 11,000 and 13,500, 16,000 from 2,385 GPM to 3,657 GPM  and 319 CFM to 485 CFM
  • WTP series 480, 720 from  2562 GPM to 3751 GPM
  • MEC 2,000 and MEC 4,000 prebuilt with a Honda GX gas engine.

Battioni Pagani rotary vane vacuum pumps available in many custom configurations.   Visit our the Online catalog for more details.

Watch this video from Battioni Pagani on the BALLAST 16000 pump which represents a technology breakthrough resulted from a major joint effort in product development and innovative design processes.

High Pressure Pump System Defense

The Three-Tiered Approach

While some engineers swear by such a three-tiered safety approach for high pressure pump system defense, others feel this much redundancy is unnecessary and a safety valve and unloader in combination is sufficient. Nevertheless, it is important to remember that thwarting any valve or other safety device is courting disaster and should never be done.

Second Line Of Defense

Aside from the unloader, a second line of high pressure pump system defense is the safety or pop-off valve, which is set to release water to the atmosphere when a set pressure is exceeded. However, this valve can be adjusted as well, usually with a screw driver.

The valves are built for a certain range of pressures, say from 2,000 to 4,000 psi and a safety valve can easily be adjusted, or improperly adjusted, to the point where it no longer functions as a safety device. Instead of the safety valve functioning as an artificial weak point in the machine, over pressurization may cause a rupture at a real weak point, perhaps with disastrous results.

And the Third Line

Consequently, some engineers suggest a third safety measure – a rupture disk. This disk is engineered to burst at a certain pressure, usually a bit above the machines rated operating pressure to allow for normal pressure spikes. In other words, the disk, which can be screwed into a port on the high pressure side, is a non-adjustable artificial weak point in the system.

Overheating Protection

Disks which are heat sensitive – the solder melts at high temperatures, are also available as safety devices for hot water machines. This system of preventing coil overheating was long used by a pioneer steam cleaner manufacturer.

Unloader Valve For High Pressure Pumps

Unloader Valve For High Pressure PumpsThe unloader valve for high pressure pumps is one of the two main components of the most common safety system for high pressure cleaning equipment. The other is the trigger gun.

Today, a number of automatic systems have been developed which allow for complete pump and power shutoff when the trigger gun is released. However, none of these systems are used as widely as the unloader.

How the Unloader Works

The pressure-actuated unloader is a simple valve and spring arrangement set in a metal (usually brass) body. A channel drilled through the body gives water access to the back side of the valve ball. When pressure against the valve increases to a point where spring tension is overridden and water is diverted by bypass.
Not all of the flow necessarily goes into bypass as the amount the unloader opens depends on how much pressure is exerted against the valve.
The flow-actuated unloader simply responds to a reduction or stoppage of flow.

Diverting to ByPass

The gun and unloader make up a two-part valve system that directs water into bypass back to the pump or float tank. The gun shuts off the flow of water, causing the unloader to re-circulate the water back into the inlet side of the pump. This is called sending the water into bypass. Generally, unloader valves are pressure-actuated and are opened by the increase in pressure occurring when the valve in the gun closes. Flow-actuated valves are available as well.

As Simple as Making a Fist

Unloader operation is simple. When the trigger is depressed a valve in the gun opens, and water moves from the outlet side of the pump through the hose to the gun.When the trigger is released the valve closes and the unloader is activated, either by an increase in pressure (a pressure-actuated unloader) or a reduction in flow (a flow-actuated unloader).

The unloader diverts the flow of water from the outlet side of the pump back to the inlet side, causing water to flow in a loop back to the pump under virtually no pressure rather than to the nozzle under operating pressure. Flow may be directed back to the pump inlet or to a float tank or other type of reservoir.

Acting in Combination

The unloader and trigger gun, in combination then, act as both a safety and a convenience feature. Should the operator lose control of the gun, it automatically shuts off the flow of water to and through the nozzle.
The unloader, or pressure regulating unloader, in combination with the gun, are a prime example of how safety and control functions can be combined in a single subsystem of a high pressure cleaning system.

The “Pressure Spike”

However, when the flow stops initially, there is an immediate increase in pressure or a “pressure spike” at the gun because it takes a moment for the unloader to be actuated.
The severity of this pressure increase at the gun depends on a number of variables, including the length of hose between the gun and the pump and the pump type and speed of operation.

Factors Contributing to Pressure Spike Severity

For example: a pump is operating at a fairly low rpm is moving more water with each stroke than a pump rated for the same flow and pressure but operating at a higher speed.

Consequently, each stroke of a slowly-operating pump forces more water against the closed valve and places more stress on the fittings in the gun and the valve seating. A duplex or two cylinder pump will create more stress at the closed gun than would a four cylinder pump operating at the same flow and pressure.

Overheating in ByPass

A machine should not be run in bypass mode continuously. When a machine is in bypass mode the temperature of the water in the closed loop increases rapidly. It is undesirable for most pumps to handle water in excess of 140 degrees Fahrenheit, but occasional discharge at the gun replaces water in the loop and prevents pump damage from high temperatures. A temperature-sensitive valve or pump protector on the bypass line can provide even more permanent pump protection.

Using the Unloader to Regulate Pressure

In the specific case of the pressure-actuated unloader, pressure can be controlled to a certain extent by adjusting the tension on the spring holding the piston in the valve in place. (Remember, this is called a pressure regulating unloader).

An unloader is not an absolute, on-or-off device. Rather, it can allow a certain amount of flow to bypass the hose to the gun and return to the inlet side of the pump. The amount of by pass is set by tightening or loosening spring tension with a nut or hand grip on the end of the unloader opposite the outlet port.
This means that the flow of water to the nozzle, and consequently, the amount of pressure produced at the nozzle, can be regulated to some extent by adjusting a pressure-actuated unloader.

Or Changing the Nozzle

However, it is important to remember that the unloader is not always primarily a pressure-regulating device. That is, you can but do not generally, control the amount of pressure produced at the nozzle by tightening or loosening the unloader.

Pressure can best be controlled by changing the nozzle to a larger orifice size (less pressure) or a smaller orifice (more pressure). This is a matter of some disagreement in the industry since some operators, and others have long used unloaders as a handy way to increase pressure.

The Quick Fix

What generally happens is that the operator notices a decrease in pressure at the nozzle. Under normal circumstances this is a sign of nozzle wear and means the nozzle should be replaced.
However, a quick fix can be to simply tighten the adjusting nut on the unloader to decrease the amount of water in bypass. But if no water is being diverted from the nozzle, then there is no way for pressure to increase and the whole exercise is futile.

Some unloaders manufactured today have a small hand grip for unloader adjustment instead of the nut. In the case of at least one manufacturer this hand grip not only makes adjustments which can be made on the unloader.
To most manufacturers of unloaders, the ability to adjust spring tension is simply a fine-tuning feature and the use of a set screw is representative of that approach.

Not Necessarily the Safe Solution

Safety is the reason most often cited by engineers in opposing the use of the unloader as a pressure controller. An unloader valve under maximum spring tension may require up to twice the pressure to go into bypass mode as a properly set valve.

This can become critical in a situation where a machine designed for 2000 psi is subjected to up to an additional 2000 psi pressure spike before entering bypass mode.

Although most pressure-containing components used in the industry conform roughly to Society of Automobile Engineers’ standards for hydraulic components, or, in other words, have a burst pressure four times rated operating pressure, an operator cannot be guaranteed the machine he is working with conforms to those totally voluntary standards.

In fact, the gun is one of the components which is not necessarily designed with a four-to-one safety factor and guns have been known to burst at less than double rated pressure.

Other Uses of the Unloader Valve For High Pressure Pumps

Some components manufacturers recommend always having a little water in by pass if only to cushion the valve seat. Without some circulation the ball is slammed into the valve seat and more rapid wear results.
Additionally, by pass flow can compensate for nozzle wear. As the nozzle orifice erodes, water is diverted from by pass to the gun and operating pressure is maintained.