- HOME>
- Products>
- Wastewater & Sludge Treatment>
- Leaf Spring Diffuser
Outline
The series of leaf spring diffusers integrates our unique stainless-steel leaf springs.
The air breakup effect of the vibrating leaf spring ensures high oxygen absorption efficiency，and achieves an ideal aeration tank agitation effect.
Its unique structure prevents clogging from occurring，allowing several years of maintenance-free operation and hence saving maintenance costs.
Features
Clogging-free air diffuser
Since no ciogging occurs，the leaf spring difuser can be used maintenance-free for an extended period, stably maintaining the initial level of effency.
Automatic adjustment function at the outlet
The leaf spring automatically balances the flexible spring force and the air bag pressure to determine the opening of the outlet, thus covering a vast airflow range. If the airflow increases, the distortion of the leaf spring follows suit, and the automatic adjustment function is activated, with the size of the opening automatically selected based on the flow rate to attain a balance.
In addition, unlike diffusers of other types, its pressure decrease characteristics shown below, along with the characteristics described above, allow automatic balancing of the entire diffuser system without the use of additional devices such as an orifice.
Eliminating the need for an air filter for the blower
Since the leaf spring diffuser has a wide discharge port, no clogging occurs, unlike other porous-type diffusers, eliminating the need for an air filter, which is a major advantage of the leaf spring diffuser.
Stably oxygen absorption efficiency
The series of leaf spring diffusers consistently achieves stably oxygen absorption efficiency under all conditions.
Air bubblees are broken down into minute optimally-sized bubbles at the outlet thanks to the vibration of the leaf spring, which ensures an absorption efficiency of approximately 9.0%.
Backflow prevention
When airflow for aeration is stopped, the leaf spring automatically functions as a check valve to prevent the backflow of wastewater into the diffuser and piping systems.
Self-cleaning function
The vibration of the leaf spring prevents solid matter from accumulating (self-cleaning function), hence clogging can be prevented.
The leaf spring mounted facing downward creates an air screen around the diffuser, thus preventing fibrous substances from becoming entangled.
Product profile
Type 1
Type 1 is an impact and heat-resistant diffuser made of resin and equipped with a leaf spring.
The airflow rate of type 1，which is equipped with a connection port for a 3/4 B pipe female screw, is 110 to 340 L/min.
Type 1 is mainly used for small-scale aeration systems and as a replacement for other types of diffusers.
Type 3
Type 3, structured to allow three leaf springs to be mounted to the main unit consisting of 40-mm square stainless steel pipes, has an airflow rate of 170 to 1,700 L/min.
Type 3, with connection ports equipped with 3/4 B female or 1B male screws, can be used for various aeration systems.
Type 6
Tyep 6, a stainless steel diffuser equipped with 6 leaf springs，has an airflow rate of 340 to 3,400 L/min.
Connetion is made using 4 bolts at the center of the flange.
Type 6 (1,800-mm long), which creates wide-band aeration patterns, is designed to be mounted to an air header installed on the floor of the aeration tank, whereas type 6 (1,500-mm long) is designed to be mounted to a drop pipe.
Specifications
| Type 1 | Type 3-M | Type 3-F | Type 6 | |
|---|---|---|---|---|
| Diffuser assembly | ||||
| Operating range (L/min.) | 110-340 | 170-1700 | 340-3400 | |
| Recommended design capacity (L/min.) |
280 | 1100 | 1000 | 2100 |
| Pressure loss (Water column: mm) |
200 | 330 | 300 | |
| Oxygen adsorption efficiecy (at a water depth of 3,810 mm and a emperature of 21 °C) |
Approximately 9.0% |
9.1% | 9.2% | 9.1% |
| Connection port | 3/4B PT female screw |
1B PT male screw |
3/4B PT female screw |
11/2B JIS 5KF.F |
| Mass (kg) | 0.14 | 1.1 | 0.9 | 2.7 |
| External dimensions (mm) | 51×38 ×178 |
38.5×38.5 ×730 |
38.5×38.5 ×670 |
38.5×38.5 ×1500 |
| intervals between diffusers (mm) | 178 | 914 | ||
| Height from the bottom face of the diffuser to the flange surface |
- | 90 | ||
| Leaf spring | ||||
| Number of leaf springs | 1 | 3 | 6 | |
| Number of ventilation holes | 1 | 12 | 24 | |
| Ventilation hole dimensions (mm) | 25×145 | 22φ | ||
| Dimensions (mm) | 30×175 | 30×171 | ||
| Material | SUS 301 | |||
| Thickness (standard) (mm) | 0.5 | |||
| Method of fastening to the main unit |
ABS resin retainer and setscrew |
Rivet | ||
| Main unit | ||||
| Material | ABS resin retainer | SUS 304 | ||
| Material thickness (minimum) (mm) |
- | 1.2 | ||
| Amount of erosion (mm) | 0 | Less than 0.003/year | ||
Caution on safety
Be sure to read the "Operation Manual" or "Specification" carefully before use, or consult us or your dealer, to ensure proper use of the diffuser.
Copyright© METAWATER Co., Ltd. All Rights Reserved.