Centrifugal chemical pumps of H type and electric pump units on their base are designed for pumping chemically active and neutral liquids having a density not exceeding 1850 kg/m3, with a content of solid inclusions not more than 0,1% by volume, and the size of particles not exceeding 0,2 mm, for which the corrosion of the flow passage material is 01mm/year, maximum. Kinematic viscosity of up to 30х10-6 m2/s. The temperature of pumped liquid ranging from 233 up to 393 (from minus 40°С up to +120°С).
The pumps being included into the composition of the pumping unit are related to the items of general purpose, aspect I (repairable ones) ГОСТ 27.003-90 and are fabricated in climatic version У2 and Т2 as per ГОСТ 15150-69.
The pumps furnished with end-face seal of the shaft and completed with explosion-proof motors, are intended for installing in explosion-and fire hazard premises.
The classes of explosion hazard zones are 1,2 ГОСТ Р51330.9-99. The pumps and units have been designed with due account for the export delivery in conformity with the requirements of ОСТ26-06-2011-79.
The pumps of H type – are centrifugal, chemical machines, which are manufactured with stuffing box seal of the shaft or end-face seal of the shaft (single or double seal).
The case of the pump is a casting, in which the inlet and outlet branch pipes, spiral discharge and supporting legs are executed.
The inlet branch pipe is positioned along the axis of rotation, the outlet branch pipe is directed straight up and located in the same plane with the axis of rotation.
The casing of the pump is attached to the flange of the bracket. The bracket is connected with the seal housing by screws.
Arranged in the seal housing are the holes for supplying the cooling (barrier) liquid to the stuffing box or end-face seals. While pumping liquids with a temperature of 333 К (+60°С) the delivery of barrier liquid is effected from the pump case through the opening in the seal housing.
When the liquids having a temperature over 333К (+600С) are handled, the delivery of cooling (barrier) liquid is effected from the external supply source of cold water. For which purpose it is necessary to replace the plug in the seal housing with the pipe connection for a length of 30…35mm (in order to shutoff the holes in the seal housing as viewed from the case end).
The impeller – is centrifugal, of one-sided entry, closed type. The feed of liquid to the impeller is an axial one. The impeller is relieved from the action of axial forces by discharge openings executed on the main disk of the impeller.
The rotor of the pump is put in rotation by the electric motor through the coupling with rubber-bushed studs. It is admitted to use other types of couplings. Two radial bearings, installed in the bracket, give support to the rotor. To measure the temperature of the bearings, provision is made in the bracket for two openings М8х1-7Н. The sense of rotor rotation – clockwise, if viewed from the drive end.
Located in the top portion of the pump case is a hole, closed by plug and served to release an air. The bottom part of the case accommodates the hole, closed by plug and served to discharge the remaining liquid when the pump is stopped for a long period of time. Provision is made in the bracket for the pipe connection Dnom= 6,5 mm, which is designed to remove the leaks of liquid.
|Pump models||Flow (nomin.), m³/h||Head, m||Pump power input (max.), kW||Rotation speed, rpm||Rotation speed, c˜¹||Pump inlet pressure, MPa, max||Impeller diameter, mm||Efficiency,%||Voltage, V||Frequency, Hz||Type of current||Admissible positive suction head, m, max|
For example Х-Е-80-50-200 а-55-К U 2 ТU3631-406-00217975-2013, where: