The screw pump is strictly prohibited to run in the absence of liquid in the pump chamber. The screw pump must be injected into the pump body from the pump inlet before starting, so as to avoid the idling wear screw pump stator.
1. The screw pump is strictly prohibited to run under the condition that the pump chamber has no liquid. The screw pump must be injected into the pump body from the pump inlet before starting, so as to avoid idling the screw pump stator.
2. Before starting the screw pump, the running direction of the screw pump must be determined first, and the screw pump cannot be reversed.
3. The screw pump after new installation or pumping for a long time can not be started immediately. It should also inject a proper amount of lubricant or liquid from the screw pump into the pump body, and then use the pipe wrench to pull the screw pump for a few turns before starting.
4. After conveying high-viscosity liquid or corrosive medium, the pump pump chamber should be flushed with clean water or solvent to prevent clogging so as not to cause damage to the stator when the screw pump is started next time.
5. When the temperature of the screw pump is low in winter, the pump volume should be excluded when the pump is not used, to prevent the pump from freezing or cracking.
6. During the use process, the lubricating oil should be regularly added in the bearing box. When it is found that there is seepage at the shaft end, it is necessary to timely process or change the oil seal.
7. If abnormal conditions occur during operation, stop the pump immediately to check the cause and eliminate the fault.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Concave Convex Drainage Board
Concave convex Drainage Board has a good drainage system of the civil construction period and normal use of structure in playing an important role. Drain and porous tubes an effective drain drainage system, cylindrical long-short drainage plate and Geotextiles is composed of a drainage system, thus forming the function of water seepage, water storage and drainage system.
Introduction:
Dimple Drainage Board is using blow molding method to produce high density polyethylene (HDPE) Geomembrane, pressed on geomembrane pressure after the special craft the closed swelled the frustum of a cone shape, having a three-dimensional space and some support stiffness, liquid, gas can flow excreted within its plate. This dimples which in spatial structure with certain height can resist long-term high pressure without deformation.
Concave convex drainage board instead of pebbles water drainage has the advantage of time saving, energy saving and saving investment, also can reduce the load of the building.
Drainage board plays an important role in good drainage system, the civil construction period and normal use of structure. Drain board and also called basement drainage is an effective drain drainage system, cylindrical long-short drainage plate and geotextiles is composed of a drainage system, thus forming a which has the function of water seepage, water storage and drainage system.
Advantages:
low-cost, high efficiency; durable; chemical resistance, resistance to puncture of plant roots; diverse application; simple installation and quality guaranteed.
Application:
Greening project: the garage roof greening, roof garden, vertical greening, roof greening, football pitches, golf course, etc.
2. Municipal engineering: airport, road embankment, subway, tunnel, landfill, etc.
3. Construction: the upper or lower building foundation, inside and outside the basement wall, floor and roof, roof seepage control and heat insulation layer, etc.
4. Water conservancy project: the reservoir seepage water, reservoir, lake water seepage control, etc.
5. Traffic engineering: highway, railway basement, roadbed, dam and slope protection layer, etc.
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Application |
|
•New road and renovation project |
|
•Asphalt overlay on the old cement concrete road surface |
|
•Repair of asphalt pavements cracks and old asphalt road |
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•To be reinforced layer for airport runway, bridge, playground. |
Specification:
|
NO. |
Item Name |
Technical requirements |
|||||
|
H10-1.0 |
H20-1.0 |
H10-1.5 |
H20-1.5 |
H10-2.0 |
H20-2.0 |
||
|
1 |
Tensile strength N/<5cm> ≥ |
400 |
400 |
500 |
500 |
700 |
700 |
|
2 |
Elongation at break % ≥ |
200 |
200 |
300 |
300 |
400 |
400 |
|
3 |
Dimensional strength Mpa ≥ |
400 |
320 |
450 |
370 |
500 |
420 |
|
4 |
Dimensional stability % |
±2 |
|||||
|
5 |
Low temperature impact brittle property |
-35℃ crack-free bending |
|||||
|
6 |
Longitudinal flow capacity cm3/s( hydraulic pressure 5Kpa) |
5.6 |
8.6 |
5.6 |
8.6 |
5.6 |
8.6 |
|
7 |
Longitudinal flow capacity cm3/s( hydraulic pressure 350Kpa) |
15.2 |
18.2 |
15.2 |
18.2 |
15.2 |
18.2 |
Dimple Drainage Board
Convex Drainage Board,Dimple Drainage Board,Basement Drainage,Dimple Drainage Boards
ZHEJIANG BOYA COMTECH CO.,LTD , https://www.zjbytx.com