How to pump test run? (With photos)

First, the pre-commissioning preparatory work 1, check the basic surface, should meet the requirements; check the anchor bolts, should be fastened in place; two axis alignment accuracy meet the requirements. 2, the motor steering should be consistent with the direction of rotation of the pump, the motor insulation should be consistent with the provisions. 3, electrical instruments and pumps pressure gauge, vacuum gauge, etc. should be sensitive and accurate, the valve should be flexible and reliable. 4, cooling, insulation, flushing, filtration, lubrication, liquid sealing system and process piping should be connected correctly, no leakage; pipeline should be washed clean, to ensure smooth. 5, the delivery of liquid temperature higher than 120 ℃ centrifugal pump, bearings to ensure reliable lubrication, bearing parts should be cooled. 6. The mechanical seal should be cooled, rinsed and transported with easy-to-crystallize material. Before the pump is started again, the sealed parts should be cleaned to avoid affecting the sealing effect or damaging the sealing surface. The mechanical seal assembly should meet the requirements. 7, the use of packing seal pump, filler tightness should be appropriate; coolant seal ring should be aimed at cooling, cooling fluid should be unobstructed. 8, the lubrication parts, should be added to meet the provisions of the lubricant. 9, the pump inlet filter must be installed, the effective area of ​​the filter should be not less than 2 times the pump inlet cross-sectional area. 10, disconnect the coupling, the first driver test of the monomer to motor-driven test should be 2h or more. Second, the test run requirements 1, reciprocating pumps, gear pumps, screw pumps and other positive displacement pumps before starting, you must first open into the outlet valve. 2, centrifugal pump at start-up, should open the inlet valve, close the outlet valve, the motor starting power will not be too high; until the outlet pressure is stable, immediately open the outlet valve, adjust the required flow and lift. Close the outlet valve, the pump continuous operation time should not be too long, otherwise the pump liquid due to impeller agitation and temperature. 3, with the chemical medium for commissioning, pump filling, replacement, exhaust and other requirements should be implemented according to the provisions of technical documents. 4, Allows the pump to test run with water as the medium, the test should be the safest water, for the delivery of oil pump products, the pump chamber and bearing communication and the working medium as a lubricant, should work medium test run . 5, the pump must be carried out in a single unit under normal load test 4h; reciprocating pump no load (outlet valve fully open) test run, should not be less than 15min; normal, at work pressure 1 / 4,1 / 2,3 / 4 under the conditions of segmented operation test; each section of the operating time should be not less than 0.5 h; Finally, the working pressure for more than 4h continuous operation; before the previous pressure level test operation failed before the pressure level should not be carried out Test. 6, the metering pump should be measured flow; flow metering pump can be adjusted, the regulatory agencies must move flexible and accurate; can be continuously adjusted flow metering pumps, respectively, indicating the flow rate of the rated flow of 1 / 4,1 / 2, 3/4 and rated flow measurement of its actual flow. 7, the high temperature pump should be preheated before trial operation, the temperature difference between the surface of the pump body and the inlet process pipeline with working medium should not be more than 40 ℃; when the pump body is warm up, the temperature should be increased uniformly and the temperature rise per hour should not exceed 50 ℃; Preheat process, every 10min Coke half circle; Temperature exceeds 150 ℃, every 5min Coke half a circle; Check the pump housing sliding bolt at the axial expansion gap; Open the inlet valve and the vent valve , The pump discharge gas, preheat the required temperature and then close the vent valve; trial run parking, should be every 20 ~ 30 min half-turn plate until the pump temperature dropped to 50 ℃ so far. 8, the cryogenic pump to test operation at low temperatures, open the bypass pipe before precooling, according to process requirements of the pipe and pump cavity dehumidification; and then open the vent valve for precooling the pump, the cooling rate per hour Not more than 30 ℃; to pre-cooling the specified temperature, and then vent valve closed, the pump test run. 9, the steam pump cylinder before commissioning, the application of steam to warm the cylinder, and timely exhaust condensate; stop, you should put the net condensate water cylinder, and in accordance with the provisions of antifreeze insulation. 10, brittle materials (ferrosilicon, ceramics, etc.) to create the pump, the operation should prevent the rapid cooling or sudden hot, does not allow more than 50 ℃ temperature difference between hot and cold sudden change. Third, the commissioning of the standard requirements 1, running, sliding bearings and reciprocating parts temperature shall not exceed 35 ℃, the maximum temperature shall not exceed 65 ℃; Rolling temperature rise shall not exceed 40 ℃, the maximum temperature shall not exceed 75 ℃. Lubricating temperature of lubricating oil points shall not exceed the requirements of technical documents. 2, stuffing box or mechanical seal temperature, sealing liquid or cooling water temperature shall not exceed the provisions of technical documents. Centrifugal pump soft packing seal, according to the different viscosity of the transmission medium, allowing 5 to 20 drops / min uniform drop trickle leakage. The allowable leakage of mechanical seals shall comply with the provisions of technical documents. For the transmission of toxic, harmful, flammable, explosive, expensive materials and requirements of the media and air isolated pump, seal leakage should not exceed the specified value of the design. 3, the working medium relative density of less than 1 centrifugal pump, when running water test should be controlled motor current should not exceed the rated value, and the pump flow should not be less than 20% of the rated value. 4, commissioning, the motor temperature rise shall not exceed the nameplate or technical documentation of the machine; if there is no provision, should be determined according to the insulation level. 5, the rotor and the moving parts, there shall be no abnormal sound and friction phenomenon, the pump vibration value should be consistent with the provisions of technical documents; Piston pump allowable vibration value, refer to the provisions of Table 1--1. Reciprocating pump operation should be smooth, with the steam body movements should be flexible and accurate. 6, pump auxiliary equipment should be normal operation, the pipeline should be connected firmly, no leakage exists. 7, discovered the abnormal situation should be promptly addressed, the trial run process should be detailed records and deposited into the device files.

This entry was posted in on