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The working condition of the ND-630 diffusion pump depends on the temperature of the working fluid in the pump boiler. During the initial filling, it is recommended to fill the maximum volume of the working fluid. Working fluid is "VACMA OIL 500" vacuum oil (uner technical specifications TU 19.20.29-061-00218526-2019). The total amount of working fluid in the ND-630 diffusion pump is a maximum of 9 liters, a minimum of 6 liters. The viewing window for visual inspection of the working fluid has marks of its maximum and minimum amounts. During normal operation of the pump, the level of the working fluid practically does not change. The temperature of the working fluid when the pump is operating at the maximum residual pressure is about 240°C to 255°C. It is recommended to monitor the operation of heaters in the ND-630 diffusion pump using one temperature sensor. The temperature sensor must be installed in a special radiator socket above the heater. If there is a loss of working fluid and an increase in the temperature of the radiators of the ND-630 diffusion pump up to 360°C, the temperature sensor must give the command to automatically turn off the heaters. The subsequent activation of the pump heaters should not be automatic and should be performed only after cooling the system. Water at the inlet to the cooling systems of the housing and the oil reflector must be supplied with a pressure of 0.3 MPa (3 kgf/cm2) to 0.5 MPa (5 kgf/cm2) and a temperature of plus 4°C to plus 25°C. The recommended cooling water consumption for the housing is 600 l/h, for the oil reflector it is 80 l / h. It is regulated by the outlet water temperature, which should not exceed plus 40°C. The water drain should be free (with a jet break).

The working fluid of the pump is water. These pumps are designed to work with liquids as well as gases and vapors slightly soluble in them that are not aggressive to the materials of the 2VVN1-3M pump design, not explosive and non-toxic. The use of a 2VVN1-3M(H) water-ring vacuum pump for pumping out water-gas mixtures is allowed only if the bulk of the water is separated and discharged at the pump entrance. Failure to comply with this requirement may lead to unacceptable overload of the electric motor and destruction of the working bodies of the 2VVN1-3M(H) pump. The vacuum water ring pump 2VVN1-3M (H) is manufactured in the climatic version of UHL (i.e. for moderate and cold climate) 4 and O4 according to the GOST standard 15150-69, meets the requirements of technical specifications TU 3648-015-00218526-2000, designed and manufactured taking into account the requirements of GOST R 52615-2006. Electricity grid must meet the requrimemnts of GOST 32144-2013

The vacuum pump chamber is made of fluoroplastic, and other parts are coated with fluoroplastic, which ensures the high chemical resistance of the pump. It has a pumping speed of gases and vapors of 38 l/min at an extreme vacuum of 60 mbar. It is quite compact, so it can be placed in almost any already equipped space. Valve(s) material FFKM (Perfluoro rubber) Working medium Gas Country Russia Chemical resistance Yes Overall dimensions, L×W×H, mm 289.5x160x200 Protection class acc. to DIN EN60529 IP20 Noise level, dB 75 dB Power supply 230 V, 50 Hz Ultimate vacuum, mbar abs. 60 Excess pressure, bar. Max. permissible 0.5 bar Productivity, l/min 38 Drive rotation speed, rpm 1350 Maximum current, A 1.2 Device weight, kg 7.6 Working chamber material PTFE (polytetrafluoroethylene) Equipment: Vacuum pump, cable, instructions, passport, packaging (vacuum regulator and spare parts are not included in the kit and must be ordered separately).