Binks 202-755 Manuals

Binks Model 202-755 HVLP GUN ASSEMBLY Replaces Part Sheet 77-2756R-1 Part Sheet 77-2756R-2 READ BEFORE OPERATING Your new High Volume, Low Pressure (HVLP) Spray gun complies with the strict California South Coast Air Quality Management District Rule #1162 along with Air Quality Rules in other geographical areas. You should also know that the defi- nition of H.V.L.P., as defined in the S.C.A.Q.M.D. Rule #1162 reads, ”High Volume Low Pressure (HVLP) spray is a coating application system which is operated at air pressure of between 0.1 and 10 pounds per square inch gauge (PSIG).” To maintain compliance and best results, we suggest: 1. Install air pressure test gauge (207-11799) with adapter in gun nozzle body. 2. With an air hose connected to the assist air connection on rear of gun, set assist air pressure to a maximum of 40 psi. Because of the superb flow characteristics of the gun design, 40 psi max is all that is ever required with only few exceptions. 3. Open pattern control thumbwheel all the way. Pull trigger and observe the pressure reading of the test gauge. It should not exceed 10 psi. Should the test gauge indicate more or less than 10 psi, increase or decrease regulated air supply until 10 psi is shown on test gauge while pulling trigger. You might want to put a “landmark” on your air control gauge for easy reference. The variables of air hose length and regulator and gauge types sometimes require that these adjustments become necessary. 4. Remove test gauge and adapter and install 1/16″ NPT pipe plug furnished. You are now in compliance for the criteria HVLP. Should your local Air Quality Officer or Inspector ever request air pressure reading, co-operate and install test gauge and demonstrate that your nozzle pressure is 10 psi or less. The material transfer efficiency of your 755 HVLP Gun is excellent but resin and catalyst pressure(s) must also be correctly set for optimum results. We suggest: 1. Resin pump pressure should be set as low as possible for an acceptable spray pattern. Remember the assist air (10 psi) plays a big part in the final spray pattern shape. 2. Select the proper spray tip for the job. A spray tip with too small an orifice with excessive resin pump pressure would result in poor results. It is recommended that a range of spray tip sizes be on hand to avoid compromises. Your spray pattern should be a soft, uniform shape without fin- gers or tails. Resin “bounce back” should not occur. Catalyst and catalyst atomizing pressures should also be set as low as possible. Usually, the Catalyst Tank pressure is set at 35-40 psi. Catalyst Fan pressure should be 10 psi lower or 25-30 psi. Flowmeter (black ball) should be adjusted for desired gel time. A good place to start would be a black ball reading of between 60-80. Always test spray gun and gel times on waste material until you’re ready to fabricate parts. OPERATING INSTRUCTIONS