EG Series Vertical In-line Pump User Manual
1. Brief Description
Model Form
For example, EG products are a series of vertical in-line pumps designed according to the European Standard BS EN733/ DIN24255.
As in-line pumps they are used for pumping clean water or liquids with characteristics similar to water, with wide application ranging from plants, mines, city water supplies, air-conditioning, to firefighting, cooling, environmental machinery, irrigation, and so on.
Pump performance can be adjusted into different levels through impeller trimming. Motor shaft is to be inserted into pump shaft for driving. This way of close-coupling ensures the alignment of pump and motor; meanwhile, pump impeller runs in good balance both dynamically and statically, therefore pump would be kept very well in operation. EG S pump uses IEC standard motor and pump can be assembled separately without motor. EG E pump requires a special motor with extra-long shaft. EG pumps are designed with air-bleeding device, advanced in structure, compact in size, less room-required for installation and easy to maintain.
| Design | Performance referring to BS EN733/ DIN24255 standard |
|---|---|
| Structure | Vertical, Single-Stage, Single-suction, Volute Casing, In-line, Centrifugal Pump |
| Flange | DIN2501 (ISO7005.2 / GB/T17241.6 PN1.6) standard, ANSI B16.5 Class150lb optional |
| Rotation | Clockwise viewing from the drive side |
| Material | |
|---|---|
| Casing | Cast Iron standard, Ductile Iron optional |
| Impeller | Bronze standard, Cast Iron, Stainless Steel optional |
| Shaft | ASTM 420 standard, ASTM 304, ASTM 316, ASTM 1045 optional |
| Shaft Seal | Mechanical Seal (Caron-Sic/Viton standard) |
Operating Data:
| Flow Rate (Q) | 2-450m³/h |
| Head (H) | 2-150m |
| Speed | 1450 or 2900 rpm (50Hz) 1750 or 3500 rpm (60Hz) |
| Temperature | -10°C to 105°C |
| Working Pressure | 16 Bar standard |
Structure Drawing
Diagram 1: EG S. This diagram shows a cross-section of the EG S vertical in-line pump. Key components visible include the volute casing, impeller, shaft, motor, bearing, and mechanical seal. Parts are numbered for reference.
Diagram 2: EG E. This diagram illustrates a cross-section of the EG E vertical in-line pump. It is similar to the EG S but features an extra-long shaft motor. Components like the volute casing, impeller, shaft, motor, bearing, and mechanical seal are shown and numbered.
2. Assembly and Disassembly
Parts List
| No. | Part Name | No. | Part Name | No. | Part Name |
|---|---|---|---|---|---|
| 1 | Volute Casing | 7 | Mechanical Seal Seat | 12.1 | Pump Shaft |
| 2 | Adapter | 8 | Seal Seat | 12.2 | Motor Shaft |
| 3 | Impeller | 9 | Slinger | 13 | Bearing |
| 4 | Casing Cover | 10 | Screw Plug | 14 | Flexible Washer |
| 5 | Wear Ring | 11.1 | IEC Standard Motor | 15 | Bearing |
| 6 | Impeller Nut | 11.2 | Extra-long Shaft Motor | 16 | Circlip for Shaft |
1) Part Assembly
1.1) Pump body assembly
- Screw on plug for pressure-testing hole and drain hole;
- Screw on bolts for pump casing;
- Grease and drive wear ring into pump body;
1.2) Shaft assembly (EG E skip this step)
- Clean up the shaft, in the case that the inner hole of bearing cover is smaller than shaft Max. Diameter, put on bearing cover first;
- Grease bearing position, push bearing inside;
- Vise the locking ring (circlip for shaft) by caliper, then block it into the shaft ring clasp bed;
- Wear flexible gasket onto bearing;
1.3) Casing cover assembly
- Drive back wear ring into pump cover, screw on air-bleeding hole plug;
- Grease the edge of pump cover, put paper washer onto casing cover;
- Grease mechanical seal position on casing cover, press in mechanical seal static ring. Pay attention not to scratch static ring surface, pad rubber or plastic plate first before press in the static ring;
2) General assembly
- Grease adapter's bearing position (EG E skip this step);
- Insert shaft assembly into adapter (EG E joint adapter with motor and fasten);
- Lock bearing cover with bolts (EG E skip this step);
- Wear slinger onto shaft;
- Set in casing cover, ensure air-bleeding hole is aligned with adapter;
- Grease shaft then fit mechanical seal ring;
- Press down seal seat with regular strength, make sure the spring can pop-up;
- Put on the key, press impeller, place lock washer, tighten up impeller nut, then bend over lock washer;
- Set every assembly into pump casing according to drawing, lock up pump nut tightly.
Motor Terminal Box
Discharge Port (Pump Casing)
Discharge Slot (Casing Cover)
Suction Port
Air-bleeding Hole (Casing Cover) (View from the top down)
3.) Motor Mounting (EG E skip this step)
- Put the pump horizontally. Mount on motor key;
- Hoist the motor by cranes, put motor shaft into pump shaft slowly, pay attention to the alignment of the two shafts. If it is hard to get coupled, deburr keyway into smooth, note that beating is absolutely prohibited.
- Tighten bolts and nuts.
- Screw on the clamping bolts.
3. Installation
Correct way of pump installation makes great sense of stable performance and long service life. All the procedure of mounting and adjusting should be carried out carefully. For outline and dimension, see the outline picture and dimension table. Remove all the dust and dirt on base plate then place it onto ground foundation. Check foundation level by level meter, iron wedge or steel shims can be used for adjustment. Dig foundation bolts holes. Check foundation bolts to see if it is loose or not after concretion, and then tighten the bolts, check level again.
4. Starting, Checking, Stopping, Running and Maintenance
Starting
Check motor rotation before joint pump and motor together. Ensure that the pump is running freely without friction. Turn down discharge valve. Fill the pump with liquid or priming with a vacuum pump. Switch on power, gradually turn up discharge valve and adjust to the required operating performance..
Caution: The operationg time should not be more than 3 minutes while the outlet valve being closed.
Checking
Check pump rotation direction: clockwise viewing from the drive side.
Stopping
Turn down discharge valve gradually, switch off the power. Drain away water left inside the pump to avoid frost crack while the temperature is blew 0°C. To keep a pump out of use for a long time, disassemble and store them in an appropriate place after proper lubrication and packing.
Running and Maintenance
Check the readings by the meters in starting and running to make sure that the bearing heating, mechanical seal leakage and heating, pump vibration and noise or other operation issues are under control. Abnormal cases should be handled immediately. Bearings are not allowed to work at the temperature 40°C higher than the ambient temperature with the temperature not exceeding 80°C. Lubrication should be 4# Calcium Base Grease or SAE20W Oil. Pumps working at 2900 rpm should be replenished with new oil or grease every period of 2500 working hours, 1450 rpm ones should be replenished every 5000 working hours. Ball bearings should be dismantled and replaced by the new ones every 10000 working hours, the chamber should be thoroughly cleaned out and filled with fresh lubrication.
5. Troubleshooting
| Defects | Causes | Solutions |
|---|---|---|
| Pump not primed, both the hands of vacuum gauge and manometer switches violently | Not enough water filled in the pump Air leakage in the pipe or meters |
Filled with water again Fix the leakage |
| Pump not primed and high degree vacuum indicated on the vacuum gauge | Foot valve not open or clogged Suction resistance too high or suction lift too high |
Check or replace the foot valve Clean or replace the inlet pipe Reduce the suction lift |
| No water discharged while outlet pressure is pointed by the manometer | Wrong direction of rotation Impeller clogged |
Check or shorten the pipe Check the motor rotation Remove the pipe joint and clean the impeller |
| Lower capacity than specified value | Pump clogged | Clean pump and pipes |
| Too much power consumed by pump | Wear ring worn out Packing too tight Stuffing box too hot Impeller worn out Too large flow that the pump is working in. |
Replace the wear ring Loosen gland packing Replace impeller Turn down discharge valve to reduce flow |
| Abnormal noise inside the pump Pump not primed |
Flow too large Resistance too high in the inlet pipe Suction lift too high Air leakage into the inlet pipe Liquid temperature too high |
Turn down discharge valve Reduce flow Fix leakage Lower liquid temperature |
| Bearings over-heart | Short of lubricant or lubricant too dirty Pump shaft not in alignment to that of the motor |
Filled with clean oil or grease Align coupling centerline |
| Vibration | Bearing worn out Pump shaft not in alignment to that of the motor |
Replace bearing Align coupling centerline |
6. EG S, EG E Installation Dimensions
Diagram showing installation dimensions for EG S and EG E pumps. It includes a side view with dimensions labeled L, L1, AD, K, DN, D, A, F, G, H. A top view of the flange connection shows 'n-d' and 'D'. A separate view shows mounting bolt hole dimensions 'n1', 'n2', 'm', and '4-ØS'. A top-down view of the air-bleeding hole is also depicted.