Working principle: piston compressor. Lubrication method: oil lubricated air compressor. Center distance of mounting hole: 120128mm Pipe joint thread: American 3/4 Belt pulley diameter: 260mm. 2055-1.5KW-2HP air compressor head. Excellent aluminum material enhances the performance of the product. Refueling is simple and clear. Transparent oil level display, open the oil filler plug, add enough lubricating oil to the specified specifications of the machine, and the oil level to 1/2-2/3 of the oil mark. 2055-1.5KW-2HP air compressor head + silencer + screw + breathing nozzle. Applicable head judgment steps: Power matching is considered first (for heads with power? 2.2KW). Second consideration of installation size (base screw hole center distance)The third consideration is the pipe interface threadThe fourth thing to consider is the head speed the head speed is best controlled within 800r/MIN. The maximum speed is 850r/MIN. The fifth to consider the aluminum shell head pressure: pressure needs to be less than 0.8bar. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday.