Product Highlights Features Z-Class high efficency pump design, higher oil flow and bypass pressure Two-speed operation and high by-pass pressure reduces cycle time for improved productivity Internal relief valves. One is factory set for overload protection while the second is user adjustable for pre-setting maximum system pressure Sight gauge on 1 and 2 gallon and level gauge on 2.5, 5 and 10 gallon reservoirs allow quick and easy oil level monitoring Optional heat exchanger warms exhaust air to prevent feezing and cools the oil