China Good quality Automatic Spiral Type Volute Screw Filter Press Sludge Dehydrator for Mud Waste Water Treatment Slurry Mud Sewage Dewatering Treatment Machine threaded shaft extension

Product Description

HangZhou Pioniere Environmental Protection Equipment Co.,Ltd.

Screw press sludge dewatering equipment (XF series) is a new kind of sewage treatment facility developed by Pioniere. It uses multilaminated filter and spiral rotation to separate moisture from sludge. Benefiting by the special structure of fixed rings and moving rings, it allows continuous automatic operation in 24 hours without blocking. And our machines are competitive in current market for more than 6 years' experience and CE certification.

Product Details:

Working Principle:
As equipment starts running, sludge flows into the filter cylinder and moves forward to sludge cake outlet under the thrust from screwshaft. The whole filter cylinder is composed of fixed rings, moving rings and shaft. The first 2 sections are thickening zone, last 2 are dewatering zone, The space between screw blades gets more and more narrower, which means the inner pressure gradually gets bigger. Under this pressure, liquid is squeezed out from the sludge and leaks from the small gaps between rings. And the left dry solid is pushed to the sludge cake outlet.

Selection Reference:

DS standard capacity (kg/h) Sludge Volume (m³/h)
Concentration Low~High 2000mg/L 5000mg/L 10000mg/L 20000mg/L 25000mg/L 50000mg/L
XF 101 3 5 ~1.5 ~0.6 ~0.5 ~0.25 ~0.2 ~0.1
XF 131 6 10 ~3 ~1.2 ~1 ~0.5 ~0.4 ~0.2
XF 132 12 20 ~6 ~2.4 ~2 ~1 ~0.8 ~0.4
XF 202 18 30 ~9 ~3.6 ~3 ~1.5 ~1.2 ~0.6
XF 301 30 50 ~15 ~6 ~5 ~2.5 ~2 ~1
XF 302 60 100 ~30 ~12 ~10 ~5 ~4 ~2
XF 303 90 150 ~45 ~18 ~15 ~7.5 ~6 ~3
XF 352 120 200 ~60 ~24 ~20 ~10 ~8 ~4
XF 353 180 300 ~90 ~36 ~30 ~15 ~12 ~6
XF 403 270 450 ~135 ~54 ~45 ~22 ~18 ~9
XF 404 360 600 ~180 ~72 ~60 ~30 ~24 ~12


XF 101 1816 756 1040 0.2 190
XF 131 1969 756 1040 0.2 205
XF 132 2069 910 1040 0.3 275
XF 202 2500 935 1270 0.8 470
XF 301 3255 985 1600 0.8 820
XF 302 3455 1295 1600 1.2 1350
XF 303 3605 1690 1600 1.95 1820
XF 352 4140 1550 2250 3.75 2450
XF 353 4420 2100 2250 6.0 3350
XF 403 5150 2350 2250 6.0 4950
XF 404 5350 2850 2550 8.2 5250


♦ Energy, water, polymer saving
♦ Compact design, small floor space
♦ Low-speed operation, low power consumption and noise
♦ Self-cleaning, free of clogging, easy to handle oily sludge
♦ 24h automatic continuous control, simple operation and maintenance
♦ Widely applied in municipal sewage, papermaking, chemical industry, food and beverage processing, pharmacy, petroleum refining and extraction, breeding and slaughtering and other industrial wastewater.

Process Diagram:

About us:

HangZhou Pioniere, established in 2012, is specialized in manufacturing, developing and marketing of multi-disc sludge dewatering equipment and related wastewater treatment system. With the spirit "High Quality, Fast Service", and against strong technical force, sophisticated equipment, prompt and comprehensive service, we believe we can be your best long-term cooperator.


Project reference:


♦ Model selection: Sludge type, sludge volume, solid content and daily runtime of machine are necessary.
♦ Raw material: is SS304 or SS316 (according to different sludge types,sludge containing much chloride ion needs SS316).
♦ Manufacturer: We have our own workshop so that best quality and loweat price can be provided for you.
♦ Corollary equipments: Sludge pump and polymer dosing pump are used together with screw press.
♦ Customization: Custom-made is available.

Contact Us:
HangZhou Pioniere Environmental protection Equipment Co.,Ltd.
Add: No.2, Zhuqiao Road, Zhuqiao Economic & Development Zone, HangZhou City, ZheJiang Province, P.R. China.
Web: yxpioniere

After-sales Service: Provide Technical Support by Video Call, Email .
Warranty: One Year
Type: Sludge Dewatering Machine


Customized Request

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Shipping Cost:

Estimated freight per unit.

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Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.


Screw Shaft Types

If you're looking for a screw shaft, but aren't sure which type to buy, you're in luck. In this article, we'll talk about the different types, including Threaded shank, Round head, and Machined. Once you've read it, you'll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.

Machined screw shafts

Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find one to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.

Ball screw nuts

If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft's grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it's important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the two ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These two features ensure that the ball and the nut meet at two points. You'll be amazed by the results of the work of these ball screw nuts.

Threaded shank

Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress two pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as one with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is eight mm in diameter but has a thread pitch of one mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it's important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.

Round head

A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to one mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.

Self-locking mechanism

A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.

China Good quality Automatic Spiral Type Volute Screw Filter Press Sludge Dehydrator for Mud Waste Water Treatment Slurry Mud Sewage Dewatering Treatment Machine   threaded shaft extensionChina Good quality Automatic Spiral Type Volute Screw Filter Press Sludge Dehydrator for Mud Waste Water Treatment Slurry Mud Sewage Dewatering Treatment Machine   threaded shaft extension
editor by CX 2023-11-13

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