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Steam Jet Vacuum Pump - Question Answer
Fault Check Participate table Speed ​​too low suction pipe leakage Working fluid temperature is too high Working fluid too much Working fluid is insufficient Mechanical seal is too tight Coupling is not positive Displacement reduction ◠◠◠◠Too much noise ◠◠Increase in shaft power ◠◠◠Overheating ◠◠◠◠Vibration too large ◠◠◠Operation: (1) Start-up sequence 1. Close all stack stop valves and gate valves. 2, the steam pipe completely drained, drained, has been emitting emissions, supply of saturated steam, sewage valve slightly open some. 3, open the water ring pump to supply pump water valve open, open the vacuum manifold in the Explorer, to about 93,9 mbar. 4, start two steam jet pump, the minimum steam pressure before entering the nozzle can not be less than 3,5 bar, the maximum can not be higher than 5 bar. 5, start a steam jet pump, steam pressure before the nozzle can not be less than 3,5 bar. 6, all jet pump is turned on, adjust the condenser inlet valve, so that it does not exceed the water temperature of 36 ℃. (2) shutdown order 1, turn off the vacuum valve. 2, turn off the first stage jet pump steam valve. 3, turn off the second stage jet pump steam valve and steam valve. 4, deflate water pump, turn off all water supply valve. Installation: 1, steam jet vacuum pump can be installed outdoors in the open air. If there is a shutdown or in icing conditions, the entire installation drains quickly because the inline pipe is already installed for quick drainage. 2, water ring pump must have sufficient static pressure, the pump must have a stuffing box seal. Install a check valve in the pump drain to prevent intermittent or pulsed air return. In order to effectively balance the pressure difference between the condenser, the pipe closed loop, be sure to have a suitable long road, it is best to install a drain pipe in the lowest of each loop pipe, but also can be used as cleaning water outlet. 3, install the steam pipe, we must pay attention to try to make the steam to the nozzle as dry as possible, from the steam separator to the jet pump with insulation between. The shorter the steam pipe, the better the separator should be kept dry for a long time. To this end, the steam pipe connected to the jet pump must be connected to the upper end of the steam main pipe. The warm steam not only erodes the nozzle and prematurely spread but also seriously affects the function of the small nozzle mouth . Due to the high vacuum requirements and, in particular, the small nozzle size in the pump, it is important to check that the air line between the steam filter and the steam jet in the jet pump is clean. Steam jet pump installed on the so-called into the car small air box, you can easily remove the nozzle, with a probe intuitive check nozzle path. Do not place the steam washer eccentric, so as not to affect the free flow of steam cross-sectional area. Maintenance: 1, should be regularly compressed packing, such as packing due to wear and tear can not guarantee the required seal should be replaced by a new packing, packing can not be pressed too tight, normally compacted packing allows water dripping out, but not too much , The application of oil asbestos rope filler. 2, but the measured temperature should not exceed 70 ℃, 2/3 of the bearing room full of space filled with butter, the normal work of the bearing should be loaded 3-4 times a year, bearing cleaning at least once a year, and all the lubricating oil replacement . Source: Guangzhou Heng Ze Vacuum Equipment Co., Ltd.