Crankcase Vacuum Valve


+ Free Shipping

Anti-Splat-Aero is very proud to offer this very reliable crankcase vacuum valve and 321 stainless steel fitting that will put the finishing touch on your oil separator installation. This special valve in conjunction with our installation kit, complements the main product “THE ASA OIL SEPARATOR”. We have had many requests for these items to enhance the installation and realize that it may be very difficult for many people to obtain these items locally. Full installation and maintenance instructions will be included. We intended to have a video or slide show presentation here on our videos page but we have been so busy that hasn’t happened. Please have a look at this valve as well when ordering a separator. This one way vacuum check valve accomplishes a number of things, (all being good) and greatly enhances performance of your aircraft. I will attempt to touch on some of the benefits here. Should you have questions or require more information just give us a call. This assembly, when fitted to your engine will create a vacuum in the crankcase of 5 or 6 inches when in operation. It accomplishes this via two separate actions, # 1 exhaust flow over the bias cut tube, and # 2 the pumping action of the engine crankcase volume changing with rotation. The one way valve allows the crankcase to exhale only, and this action creates a low pressure in the crankcase. The engine is sealed and the only air path in is through the piston ring end gap or the valve guides. This usually cuts oil consumption in half, or stops it all together, as the afore stated areas are where the losses occur. Your engine will virtually stop all leaks and seeping when in service, due to the vacuum inside. This system stops any possibility of freezing up the breather in cold climates, as no moisture laden air is present in the engine and none can be inhaled through the overboard draft tube. The rarefied air and low pressure in the crankcase has a very dramatic effect on windage and oil in suspension, thus freeing up a little power and adding some efficiency. This will also greatly lower the boiling point of any moisture that finds it’s way into the engine. Any oil temperature over 160 degrees will get rid of all the moisture in turn the acids. Any lowering of pressure on the underside of the pistons is exactly the same as adding cylinder pressure on top. This results in a very noticeable power increase (on the average 180 HP engine, 6 to 8 HP). We hear this over and over with reports of higher static rpm, better climb and acceleration, lower fuel burn etc.  The belly of your airplane will stay immaculately clean as anything that exits the separator will be consumed in the exhaust stream. This all sounds too good to be true! Well it is true and we know you will love this system.

Availability: 9 in stock

SKU: N/A Categories: , Tags: , , , , ,
Weight .5 lbs
Dimensions 6 × 2 × 2 in


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Shopping Cart