The concept of an Archimedean screw is over 2000 years old, and has many uses in modern life, however it is commonly used in a trough for moving water. This often makes the cost of their use prohibitive, due to complicated construction and restrictions on size. Along with this, wear levels are high, and leakage down the screw can reduce their efficiency,
meaning larger sizes are specified to achieve the desired result.To get more news about screw pump rotor, you can visit hw-screwpump.com official website.

Fish Flow Innovations have revolutionised the use of Archimedean Screws by being loyal to the original concept of using the screw in an enclosed tube- this way every drop that enters the screw is moved to the top, vastly improving efficiency, with obvious knock-ons to running costs, reducing size of the pump, and even savings in construction of the surrounding buildings and civil structure.

The design is simple, yet very clever, using high grade materials such as Stainless Steel and Vinyl Ester Composite to keep weight low, preventing osmosis-related damage and ensuring a long, trouble free life. A major factor in it's efficiency is that there is no leak path, with no requirement for seals that can wear on the screw vanes, meaning that EVERY drop that goes in, is pushed out at the top.

The pump is delivered as a single module, can be installed in a matter of a few hours, and requires an extremely simple civil structure, vastly reducing site costs when compared with a traditional screw pump.
The ACE archimedean screw pump has been developed in the Netherlands by Fish Flow Innovations, with the key design criteria being absolute safe passage for fish that enter the pump. In developing a specifically designed leading edge for the pump, benefits in efficiency and energy savings were also noted, making the pump the perfect solution.

The leading edge has a curved vane, which glides smoothly into the water to reduce splash and turbulence, and in turn it hydraulically guides fish and debris into the screw pump preventing collision. The smooth entry into the water also prevents direct strike as found with common screw designs, and the lower speed that is required due to the increased efficiency also helps to preserve fish in the area. The pump has an in-built reverse facility that on stopping the pump, it is allowed to back-wind for sufficient rotations to empty the pump prior to applying the brake, allowing any aquatic life that remain in the pump to escape.
The Fish Friendly Screw pump is designed to be extremely simple to install, where in most cases the pump can be installed in a matter of hours. Where typical screw pumps require weeks of complicated and intricate construction of a concrete half-pipe, the Fish Flow Innovations Screw Pump only requires a horizontal apron, and a vertical wall to sit on. The unit is supplied on a fabricated frame, which merely requires bolting to the concrete surface, with electrical connection finishing the installation.

The pump has no limitation in length- typical screws are limited due to their weight, causing sag, which often requires an inefficient slope angle to be used- the FFI Screw pump can have intermediate supports keeping the build height low
If used with a non return valve for peace of mind, the FFI screw pump is capable of pumping into a head of water, again keeping the build height low
The increased efficiency reduces the overall size of the pump- all other constructions can be smaller to suit
Common practices involving fixed speed pumps may require multiple pumps to be used- Variable speed drives often mean less pumps can be used, and run at the minimum energy output require to achieve the desired flow

, screw pump stop

When the screw pump is stopped, the discharge stop valve should be closed first, and the suction stop valve should be closed after the pump is completely stopped.To get more news about screw pump, you can visit hw-screwpump.com official website.

Screw pump because of the large working screw length, rigidity is poor, easy to cause bending, resulting in work disorder. The connection of the shafting must be well aligned; In the work is best to be carried out after installation and positioning, so as to avoid deformation caused by pipeline involvement; Connect the pipeline should be fixed independently, as far as possible to reduce the pump. In addition, the spare screw in the preservation of the best suspension fixed method, to avoid the deformation caused by uneven placement.

2, the start of screw pump

Screw pump should be in the suction stop valve fully open in case of overload or suction.

Screw pump although has dry suction ability, but must prevent dry turn, so as not to scratch the working surface.
If the pump needs to start in the oil temperature is very low or viscosity is very high, the screw pump should be in the suction valve and bypass valve fully open in the case of start, let the pump start the lowest load, until the prime moder reaches the rated speed, then the bypass valve gradually closed.
When the bypass valve is started, the liquid is constantly circulating in the pump under the condition of throttling, and the more circulating oil, the longer the circulation time, the more serious the heat of the liquid, and even the pump due to high temperature deformation and damage, must be paid attention to.
3, screw pump operation

The screw pump must be operated in a given direction to produce a certain suction.

Pump work, should pay attention to check the pressure, temperature and mechanical shaft seal work. The shaft seal should be allowed to have a trace of leakage, such as the leakage amount does not exceed 20~30s/ drop, it is considered normal. If the screw pump in the work of noise, this is often due to the oil temperature is too low, the oil viscosity is too high, the oil into the air, coupling loss or excessive wear and other causes of the pump.