9 Air-Oil Tanks Specifications subject to change without notice or incurring obligation Features and Benefits • Operation to 150 psi • Single tank units • Double tank units, save space in two direction control systems • Black anodized heads • Tapped mounting holes in top and bottom heads • Large flow ports • Fill port on top • Drain port on bottom • Brass baffle plates and internal parts • Baffles, top and bottom, help prevent fluid aeration 10-26-04 9.1 Single Tank Units Double Tank Units Features & Benefits Fill Port Flow Port Drain Port Flow Port Quiet zone below baffle plate for sediment to settle out Brass baffle plates, tube, & spacers, top & bottom Custom molded Buna-N tube seal Baffles force fluid or air to sides of tank, eliminating surface disturbance, aeration & foaming Usable Oil Capacity Translucent fibreglass tube Air-Oil System Notes 1 The best control is achieved by installing the speed control valves so that the fluid being forced out of the cylinder is being controlled. See the circuits on page 9.4. 2 The piping between the cylinder and the speed controlling valve should be rigid enough to maintain the required rigidity of the system. 3 It is best to mount the tanks so that the bottoms of the tanks are higher than the cylinder. Cylinder ports should be up with piping running as straight as possible to the tanks. This aids in purging the cylinder of air, by allowing the air to rise through the piping and into the tank where it will dissipate. 4 The highest fluid level should be kept reasonably near the top baffle to avoid excessive air usage, providing the quickest cycle reversal, and to allow for possible fluid loss. 5 If the fluid levels in the tanks unbalance, the fluid is bypassing the cylin- der's piston seal. This can occur in a new cylinder with U-Cups designed for air service or side loading on the piston rod. In old systems the bypass can be a result of seal and cylinder wear, seal shrinkage, and many other rea- sons. See circuits on page 9.4 showing crossover valve for tank balancing. • Choice of 1-1/4", 2" and 4" I.D. tanks • Tank lengths to your requirements • No sight tubes or gauges • Translucent fiberglass tube provides full visibility of the fluid at all times. You can see when fluid levels are too low or too high. You can also see if there is air or foam in the fluid. (-15° to + 200°F) • Custom molded Buna-N tube seals provide both I.D. and face sealing for a positive, no leak assembly • Tie rods of plated, high strength threaded rod • Aluminum tie rod cover tubes control the “H” dimen- sion and provide controlled compression of tube seals. They also provide a clean appearance. • Plated tie rod nuts DAO – 2 x 9 SAO – 2 x 9 These units, with their many unique and attractive features, provide the ultimate for those systems that require hydraulic-type (precision, smooth, and rigid) cylinder control from shop air. Air-oil systems can provide the smoothness and rigidity of a hydraulic system without the inherent high costs and space consuming pump, motor, tank, relief valve, and other components required for a noisy hydraulic system. They may also be used as storage tanks in booster systems, see page 6.11. Fabco-Air's unique AIr-Oil tanks are available in single tank and space-saving double tank ver- sions with bore (I.D.) sizes of 1-1/4", 2" and 4" to suit all applications. Single Tank Units are used when hydraulic control of the cylinder is required in one direction only. If there is any question as to the integrity of the piston seal, a double tank is recommended. Single Tank Units are also used as fluid storage tanks for boosters, hydraulic shock options, and other applications. Double Tank Units are used when hydraulic control of the cylinder is required in both directions. The one-piece heads that hold both tanks simplify mounting and save space.