Horizontal electric pump units of NGN type
Application
Horizontal electric pump units of NGN type are intended for using in process installations of petroleum refining and petrochemical manufactures and also in other branches of industry for oil, petroleum products or other liquids pumping of similar physicochemical properties.
Electric pump units are intended for external installations and in locations where is possible by the operation conditions mixtures formation with air which are related to IIА, IIВ category and explosion safety groups Т1, Т2, Т3 and Т4 according to the State Standard 12.1.011-78.
Operational field, QH
Technical characteristics
|
Unit type
|
Supply m3/h
|
Head
m
|
Performance index, %, no less
|
Pressure at pump inlet (differential),
kgs/cm2
|
Weight,
kg
|
Revolution,
r.p.m.
|
Cavitation
reserve, m,
no less
|
Drive capacity, kW
|
|
|
|
|
|
min
|
max
|
|
|
|
5,5
|
7,5
|
11
|
15
|
18,5
|
22
|
30
|
37
|
45
|
55
|
75
|
90
|
110
|
|
NGN35/70
|
35
|
70
|
55
|
1
|
20
|
1630
|
2950
|
4,3
|
+
|
+
|
+
|
+
|
+
|
+
|
|
|
|
|
|
|
|
|
NGN35/125
|
35
|
125
|
55
|
1
|
20
|
1750
|
2950
|
4,3
|
|
+
|
+
|
+
|
+
|
+
|
+
|
|
|
|
|
|
|
|
NGN35/240
|
35
|
240
|
55
|
1
|
20
|
2100
|
2950
|
4,3
|
|
|
|
|
|
|
+
|
+
|
+
|
+
|
+
|
|
|
|
NGN65/70
|
65
|
70
|
55
|
1
|
20
|
1630
|
2950
|
4,3
|
|
+
|
+
|
+
|
+
|
+
|
+
|
+
|
|
|
|
|
|
|
NGN65/125
|
65
|
125
|
55
|
1
|
20
|
1750
|
2950
|
4,3
|
|
|
+
|
+
|
+
|
+
|
+
|
+
|
+
|
+
|
|
|
|
|
NGN65/240
|
65
|
240
|
55
|
1
|
20
|
2100
|
2950
|
4,3
|
|
|
|
|
|
|
|
+
|
+
|
+
|
+
|
+
|
+
|
Design description
Pump units of NGN type are cradle-mounted, horizontal with single or double stages.
Pump running gear is placed on rolling-contact bearings lubricated with oil, which is delivered to the bearings over the drilled channels from the pockets, in which oil is supplied with the help of oil-feeding disks.
Oil in running post case, thrust bearing housing and pump post are refrigerated by water or diesel fuel supply in cavity of the respective parts under the temperature of operating fluid above 2000ºС.
Moreover, refrigerating fluid is supplied into the cavity, separating pump and running post, end seal cooler and end seal container pot cooler.
Direction of fittings axles: in outlet fitting is vertical, in inlet is horizontal or vertical.
Pumps components and subunits are unified.
Pumps performance is possible in two rotors modifications:
modification 1 - supply 65 m3/h, modification 2 - supply 35 m3/h.
Seal
Shaft seal is face of «Tandem» type.
End seal gate liquid is mineral oil.
Overall and installation dimensions
Материал проточной части
|
Обозначение материала деталей проточной части
|
Материал
|
|
А
|
25Л ГОСТ 977-88
|
|
Д
|
15Х13Л ГОСТ 977-88
|
|
20Х13 ГОСТ 5632-72
|
|
К
|
12Х18Н9ТЛ ГОСТ 977-88
|
|
12Х18Н10Т ГОСТ 5632-72
|
