AIRGUARD™ Blockage Prevention System FAQS
How does the Airguard Blockage Prevention System work?
The Airguard BPS circulates the hydraulic oil through a radiator that’s mounted to the fan housing intake of the air seeder cart. We tap into the Return side of the fan motor, therefore we do not take hydraulic power from running the air seeder unit. We extract the heat before the oil gets returned back to the tractor, increasing the life of the oil. By heating up the air the BPS prevents condensation and reduces buildup on all internal components, and at the same time cools the oil.
What effect does the Airguard Blockage Prevention System have on my air seeder?
Here is a full test report on the effectiveness of the Blockage Prevention System:
TEST REPORT - BP SYSTEM
Can I dry out the fertilizer inside the cart?
No. There is not enough time to dry out the product if it’s already damp. It will, however, eliminate any future moisture to be drawn into the system. The warmer air allows the meters to operate more efficiently.
And the hoses, manifolds and openers are warming from the inside. After putting on the BPS, you can immediately feel the difference in the temperature of the hoses under the cart. Since all the parts are physically warmer, dusty fertilizer, mixed with humidity that’s constantly being drawn in, will not have a cold surface to build up on. Everything flows better through to the discharge at the opener.
How is the radiator protected from over pressurization?
The Airguard Blockage Prevention System has a pressure relief port (TANK) that regulates the pressure. A 3/4" hydraulic hose line must be fitted to this relief port with proper free flow couplers and plumbed back to the hydraulic reservoir of the tractor. This port cannot tie into an existing case drain line as this will cause excess back pressure in the relief line. There must be unobstructed flow back to the tractor to prevent damage to the system. Airguard supplies specially designed quick couplers with our relief line kits that have check valves built in and free flow to ensure they will operate correctly. The system will automatically self regulate if installed properly to ensure that oil flow is directed either to the relief line or through the radiator core. This will ensure that the pressure in the core stays at a safe level.
Pressure spikes are unpredicatable. Often they occur at startup, when filling the cart with more seed, or during the shutdown of the air cart. They can also happen when you engage the shanks or lift up the shanks when in the field. Having a properly designed relief line kit is important to ensure that you are protected from these unpredictable pressure spikes.
Our aluminum radiator cores are pressure rated to 1800psi to ensure that your investment is protected.
Why do I need a Snorkel kit for my Airguard Blockage Prevention System?
We designed our snorkel kits to help reduce maintenance on the BP System. Using a snorkel kit moves the air intake to the top of the cart thereby allowing the fan to suck in clean air. This reduces the amount of dust and debris that the fan sucks in, which helps to keep the radiator fins clean. It also helps to keep the internal parts of the air system clean and reduces plugging issues.
The single snorkel is designed for smaller fans, mainly the Crary 6" Fan. The dual snorkel is designed for higher flow fans which is most of the fans on air seeders. The dual snorkel ensures that fan air flow is not restricted by using 2 - 8" hoses for the air intake.
I need a part for my Blockage Prevention System
Here are the detailed parts lists for each Blockage Prevention System Kit:
Main Rad Assembly - 7650
Oil is coming out of the Relief "TANK" port on my BPS
There are several reasons that this may be happening:
- Blockage Prevention System is hooked up backwards. IN and OUT Hoses are installed in the wrong ports. The IN Port always needs to be connected to the Return side of the Fan Motor.
- There may be excessive back pressure on the OUT port of the Blockage Prevention system. Install gauge and check if back pressure is below 400psi. If pressure is below this level there may be a faulty pressure relief valve. Call us to get replacement part. If the back pressure is above 400psi, check the following:
- Quick Release Coupling is too small (Minimum size is 3/4". High Flow Coupling is preferred)
- Return line should be free from restrictions. If the return oil is going through a manifold, it can be diverted straight back to the tank, but not through the system return.
- Cold Oil (ensure that oil is warmed prior to engaging fan motor.)
What is the pressure relief line kit?
It’s an extra hydraulic line that is plumbed back into the reservoir tank of the tractor from our radiators. It’s the ‘safeguard’ against issues you can have with overpressurization. We want to avoid causing unnecessary internal oil pressure spikes wherever possible. As an example when seeding, we often switch the oil flow direction from operating the unit to filling the cart. If we put it into FLOAT mode, rather than into an abrupt change in oil flow direction to run the auger/conveyor, we can eliminate some of those spikes.
Why do I need to plumb all the way back to the tractor?
The ¾” hoses that we provide in our kits, allow for the surge in oil pressure to be rerouted and still be contained in an enclosed system. There must be an unobstructed flow back to the tractor to prevent damage to the system, a zero pressure return. We allow the system to self regulate at a safe level when the oil flow is directed either to the relief line or through the radiator core. It also allows the operator to adjust the relief valve pressure and turn our line into a case drain. Without the extra line installed we VOID the warranty.
Can we tie into an existing factory return or case drain line?
That is NOT recommended! The factory return line has a significantly high pressure flow rating. We do not want to tap into a line with that internal pressure. If we did it would cause our relief valve to not operate properly. The ½” case drain line is almost at full capacity when operating in normal conditions, relieving constant pressure off the fan motor itself. It’s not designed to handle a surge of oil pressure and increase the oil volume substantially. Our line is designed and sourced to withstand the extra flow and pressure capacity that is demanded of it. It allows the factory lines to function properly with the BPS on the unit.
I have a tow behind cart…so that means I need to plumb further?
Yes that is correct. We have included custom Quick Coupler disconnect fittings in our kits, that ensure you can relieve the oil and still detach machines from one another. The male couplers have check valves built into them, ensuring that the oil flow can never come back from the tractor, and that the oil pressure is always allowed to escape. If customers make up their own hydraulic lines I’d still recommend they use these custom couplers.
I have a twin fan, should I do both, or 1?
It depends on where the issues with the operation are:
- Fertilizer dust buildup issues due to humidity: Recommend installing BPS on the fertilizer fan.
- Seed treatment coming off the seed: Recommend installing BPS on the seed fan.
- Need to cool hydraulic oil: Recommend installing BPS on the fan that is easiest to access.
- Issues on both the seed and fertilizer lines: Recommend installing BPS on both fans.
- If the fans both supply the same plenum then you will need to install BPS on both in order to heat up the air stream sufficiently to make a difference.
Do I need two relief lines back to the tractor, if I install 2 BPS’s?
No matter if it's a tow behind unit or a tow between you only have to run one extra line back to the reservoir tank of the tractor. Both cores can share one relief line. We T the two tank ports together and tie them into the one line.
Do I need a snorkel? And a Snorkel mount?
The snorkel is a great way to minimize maintenance on your BPS. It simply moves the air intake to the top of the cart, allowing the fan to bring in clean air. Like any radiator, we need to keep it clean in order for it to perform optimally. If the conditions are extreme the radiator may still need to be cleaned out. It is critical that you check it on a regular basis. If you find you’ve lost air pressure, it's possible your rad is plugged. Re: the snorkel mount brackets, they’re made to simplify how the snorkel will attach to the air seeder unit. You do not need to drill any extra holes or fabricate extra parts. Check out the website to see the various options, depending on the air cart you have.
Can you purchase snorkel kits on their own without the oil cooler?
Yes you can. If customers are not having issues with oil that is overheating, or with humidity problems, but the air intake on the fan is often plugging up with straw and chaff, the snorkel is a great alternative. Various air seeders have the air intakes low to the ground and close to the tires. The snorkel alone can eliminate some of the problems that come with that. The cost is very economical. If you choose to add the BPS radiator at a later time, you can.
What sets the Airguard BPS apart, what is unique about it?
It’s compact in size and simple to install. It has a superior performance pressure rating. Is equipped with a dual pass aluminum core which takes 10-15% more heat out of the oil, compared to a single core unit.
We successfully contain the hydraulic oil internally, when pressure spikes occur. Competitors’ systems may discharge oil to the ground during operations.
What if I do not have any open ports on the reservoir tank of the tractor?
If no ports are open and available, we will need to share a port with another line. Consult your tractor dealer to decide where it would be best to share the port, so the system is not compromised. Ideally we want to plumb into a ¾” port on the reservoir tank with our relief line kit. However, if only a smaller sized port is available we must adapt the hose down to fit that size available. We are much better to run the ¾” hose right to that port and size it down then. It will be able to handle the pressure and volume of oil. DO NOT run the relief line kit to a section of line, that is ½” diameter for 5-8 ft of length, before it dumps into the reservoir tank. This will cause excessive back pressure and may cause the BPS to fail.
Should I turn the relief line kit into a case drain line?
Yes, I would recommend it. When you set the relief valve, drop the pressure 50-100 psi. Do this by watching the pressure gauge on the BPS unit. This primes the relief valve door to open fully when a large pressure spike occurs.
What maintenance does the BPS require?
The relief valve must be reset each year before seeding. See Step 12 in the installation manual. We want to ensure that all internal, moving parts are lubricated and operating properly.