User manual GRACO SURGE TANKS 307707ZAN

[. . . ] Instructions­Parts List HIGH­FLOR SERIES Surge Tanks Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions. 307707ZAN ENG These tanks reduce fluid surging in a high­ or medium­volume, low­pressure fluid system. For professional use only. Model 220157, Series E on Surge Tank Stand Kit 218742 7139A Model 238983, Series C on Surge Tank Stand Kit 218742 7287B Model 233736, Series A TI1898B Table of Contents Warnings . 5 Models 238983, 238984, 238985, 238986, 238987, 238988, 218509, and 220157 . [. . . ] Remove the relief valve cap and the tank charge valve cap from the tank charge valve. Replace the two caps hand-tight. WARNING To reduce the risk of fire or explosion, which could result in serious injury and property damage, always use an inert gas, such as nitrogen or compressed air, to charge the tank. NOTE: Do not install a continuously fed gas charge supply to the surge tank. Doing so will adversely affect the surge tank performance. Relieving Gas Pressure in the Tank D This tank has a pressure relief valve that automatically relieves gas pressure (only) in the tank if it overpressurizes while charging. D To manually relieve gas pressure in the tank, remove the cap from the charge valve (6). NOTE: Relieving all gas pressure takes several minutes. Flushing Procedure For the best flushing results, alternate the gas charge pressure between 2/3 of the fluid pressure (normal operating condition) and zero pressure. This allows the flushing solvent to reach all areas of the fluid containing vessel. 10 307707 Operation Models 238983, 238984, 238985, 238986, 238987, 238988, 218509, and 220157 relief valve cap Model 218509 shown tank charge valve cap tank charge valve 7142B Fig. 5 307707 11 Operation Model 233736 WARNING D Always follow the Pressure Relief Procedure on page 9 before you remove the surge tank for any reason. NOTE: Always re-torque all of the cap screws using a star-pattern sequence before you charge or operate the surge tank to ensure against fluid or air leakage. For torque specifications, see the Parts Drawing on page 20. Relieving Air Pressure in the Tank To manually relieve air pressure in the tank, back out the plug (11). Fill the Tank with Fluid 1. The surge tank is ready for use. CAUTION The maximum working pressure for Model 233736 is 360 psi (2. 5 MPa, 25 bar). Do not exceed this fluid line pressure. Charging the Tank with Air The fluid line pressure must be at zero before you charge the tank. Pressure in the fluid line prevents the tank from accepting a full charge. Open the air valve (N) and set the air regulator (M) to the desired pressure. When the tank is charged with air, close the air valve (N) to prevent air from escaping when fluid is introduced. For the best results, set the air pressure to 15 psi (0. 1 MPa, 1 bar) below the fluid pressure. For fluid pressures of 232 psi (1. 6 MPa, 16 bar) and above, set the air pressure to 218 psi (1. 5 MPa, 15 bar). Flush Before First Use The surge tank is tested with oil in production. Before using, flush the tank thoroughly with a compatible solvent. WARNING To reduce the risk of fire or explosion, which could result in serious injury and property damage, always use compressed air to charge the tank. Never use pure oxygen. 12 307707 Troubleshooting WARNING To reduce the risk of serious injury, including splashing fluid in the eyes or on the skin, always follow the Pressure Relief Procedure on page 9 before you check or service the surge tank or remove the surge tank from the system. CAUTION If you replace the diaphragm, do not attempt to make a new one yourself. Other materials may not stand up to the pressures developed in the tank or to the fluid being pumped. A ruptured diaphragm will release gas into the paint line. Problem Surge tank will not accept a gas charge. Cause Plugged restrictor in charge valve (not applicable for Model 233736) Solution The restrictor is a safety device that prevents overpressurization during charging of the tank. Charge the surge tank to recommended air pressure (see Operation section). [. . . ] Model 233736: stainless steel, PTFE Model 218509, 220157: carbon steel, electroless nickel-plated steel, UHMW polyethylene, fluoroelastomer, PTFE Model 220157: 304 and 17­4 PH stainless steel, UHMW polyethylene, fluoroelastomer, PTFE, tungsten carbide * Maximum flow rates are recommended maximums for peak performance. Exceeding these values reduces the surge tank's ability to dampen pulsation. Canadian Registration Number (CRN) Model 218509 220157 Alberta 0C4155. 2 0C4155. 2 Ontario 0C4874. 5 0C4874. 5 307707 23 Graco Standard Warranty Graco warrants all equipment manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective. [. . . ]