Roots blower
The roots blower is composed of five parts: casing, wallboard, impeller, oil tank, and muffler.
Casing: mainly used for supporting (wallboard, impeller, muffler) and fixing.
Wall panel: It is mainly used to connect the casing and the impeller, support the rotation of the impeller and play the role of end sealing.
Impeller: It is the rotating part of the Roots blower, which is divided into two blades and three blades. However, due to the advantages of the three blades, such as less air pulsation, less noise, and more stable operation than the two blades, it has gradually replaced the two blades' Roots blower.
Oil tank: mainly used to store lubricating oil for lubricating gears and bearings.
Muffler: used to reduce the noise caused by airflow pulsation during the inlet and outlet of the Roots blower.
principle
The roots blower is a kind of positive displacement fan. There are two three-blade impellers rotating relatively in the space sealed by the casing and the wall panel. Because each impeller is an involute or epicycloid envelope, the three blades of each impeller are identical, and the two impellers are also identical, which greatly reduces the processing difficulty. The impeller is processed with numerical control equipment, which ensures that the two impellers can maintain a certain minimum clearance no matter where the two impellers rotate under the condition of constant center distance, so as to ensure that the gas leakage is within the allowable range.
The two impellers rotate in opposite directions. Because the gap between the impeller and the impeller, between the impeller and the casing, and between the impeller and the wall panel is very small, the vacuum state is formed at the air inlet. The air enters the air inlet chamber under the action of atmospheric pressure. Then, two of the blades of each impeller form a sealing chamber with the wall panel and the casing. During the rotation of the impeller, the air in the air inlet chamber is continuously carried to the exhaust chamber by the sealing chamber formed by the two blades, Because the impellers in the exhaust chamber mesh with each other, the air between the two blades is squeezed out. In this way, the air is continuously transported from the inlet to the outlet, which is the whole working process of the Roots blower.
Characteristic:
Due to the adoption of the three-blade rotor structure and the reasonable structure at the inlet and outlet of the shell, the fan has low vibration and low noise.
The impeller and shaft are of integral structure and the impeller is free of wear. The fan's performance remains unchanged and can be operated continuously for a long time.
The fan has a large volume utilization rate, high volume efficiency, compact structure, and, flexible installation mode.
The models are complete and can meet the needs of different users for different purposes.
Operating conditions
1. The steam inlet temperature of the conveying medium shall not be greater than 40 ºC.
2. The content of particles in the medium shall not exceed 100mg/m3, and the maximum size of particles shall not exceed half of the minimum working clearance.
3. During operation, the bearing temperature shall not be higher than 95 ºC, and the lubricating oil temperature shall not be higher than 65 ºC.
4. The service pressure shall not be higher than the pressure rise range specified on the nameplate.
5. The clearance between the impeller and the casing, the impeller and the side plate, and the impeller and the impeller of the Roots blower have been adjusted before leaving the factory. The clearance shall be guaranteed during reassembly.
6. When the Roots blower is running, the oil level of the main oil tank and the auxiliary oil tank must be between the two red lines of the oil level gauge.
7. Check whether the connection parts of the inlet and outlet have forgotten to fasten and whether the supporting parts of the piping are complete. For blowers and vacuum pumps requiring cooling water, check whether the installation of cooling water meets the requirements.
classification
Root blowers can be roughly divided into the single-stage blower and double-stage blowers according to their different working modes. The blower with only one compression stage is called a single-stage blower, while the blower with two single-stage blowers connected in series to compress the gas two consecutive times is called a double-stage series blower.
According to the number of impeller heads: two-blade roots blower and three-blade roots blower;
By use: shaft kiln blower, gasification blower, aeration blower, etc;
Classified by media type: air blower, gas blower, hydrogen blower, sulfur dioxide blower, etc;
It is divided into the direct-connected blower and belt-connected blower according to transmission mode;
It is divided into air cooling blower, water cooling blower, and countercurrent cooling blower according to cooling mode;
It is divided into the vertical blower, horizontal blower, vertical shaft blower, dense group blower, etc;
According to the seal type, it is divided into labyrinth seal, expansion ring seal, packing seal, and mechanical seal.
Installation and commissioning
Product Parameters
| Model and caliber |
speed r/min |
Intake volume Q(m3/min) and required motor power N(kw) under each discharge pressure |
| |
|
0.2 |
0.3 |
0.4 |
0.45 |
0.5 |
0.55 |
0.6 |
0.65 |
0.7 |
| |
|
19.6kpa |
29.4kpa |
39.2kpa |
44.1kpa |
49.0kpa |
53.9kpa |
58.8kpa |
63.7kpa |
68.6kpa |
| HSR50(50) |
1100 |
Q |
1.11 |
0.98 |
0.89 |
0.83 |
0.75 |
0.70 |
0.65 |
0.61 |
0.56 |
| |
|
N |
0.5 |
1.1 |
1.5 |
1.5 |
1.5 |
2.2 |
2.2 |
2.2 |
3 |
| |
1350 |
Q |
1.41 |
1.29 |
1.17 |
1.15 |
1.06 |
1.03 |
0.99 |
0.95 |
0.90 |
| |
|
N |
0.75 |
1.5 |
1.5 |
2.2 |
2.2 |
2.2 |
2.2 |
3 |
3 |
| |
1430 |
Q |
1.50 |
1.38 |
1.22 |
1.21 |
1.17 |
1.12 |
1.09 |
1.06 |
1.01 |
| |
|
N |
1.1 |
1.5 |
1.5 |
2.2 |
2.2 |
2.2 |
3 |
3 |
3 |
| |
1530 |
Q |
1.61 |
1.50 |
1.39 |
1.33 |
1.32 |
1.28 |
1.25 |
1.22 |
1.19 |
| |
|
N |
1.1 |
1.5 |
2.2 |
2.2 |
2.2 |
3 |
3 |
3 |
4 |
| |
1640 |
Q |
1.74 |
1.65 |
1.56 |
1.52 |
1.48 |
1.43 |
1.40 |
1.38 |
1.35 |
| |
|
N |
1.5 |
2.2 |
2.2 |
2.2 |
3 |
3 |
3 |
3 |
4 |
| |
1730 |
Q |
1.86 |
1.78 |
1.68 |
1.64 |
1.60 |
1.57 |
1.53 |
1.50 |
1.46 |
| |
|
N |
1.5 |
2.2 |
2.2 |
2.2 |
3 |
3 |
3 |
4 |
4 |
| |
1840 |
Q |
2.05 |
1.93 |
1.82 |
1.78 |
1.75 |
1.72 |
1.68 |
1.65 |
1.60 |
| |
|
N |
1.5 |
2.2 |
3 |
3 |
3 |
3 |
3 |
4 |
4 |
| HSR65(65) |
1110 |
Q |
1.50 |
1.34 |
1.15 |
1.14 |
1.05 |
0.99 |
0.94 |
0.89 |
0.85 |
| |
|
N |
1.1 |
1.5 |
2.2 |
2.2 |
2.2 |
3 |
3 |
3 |
4 |
| |
1240 |
Q |
1.75 |
1.55 |
1.45 |
1.35 |
1.34 |
1.25 |
1.19 |
1.13 |
1.08 |
| |
|
N |
1.1 |
1.5 |
2.2 |
2.2 |
3 |
3 |
3 |
4 |
4 |
| |
1360 |
Q |
1.95 |
1.80 |
1.70 |
1.64 |
1.55 |
1.51 |
1.45 |
1.39 |
1.34 |
| |
|
N |
1.5 |
2.2 |
2.2 |
3 |
3 |
3 |
4 |
4 |
4 |
| |
1440 |
Q |
2.16 |
2.02 |
1.88 |
1.82 |
1.76 |
1.70 |
1.65 |
1.60 |
1.55 |
| |
|
N |
1.5 |
2.2 |
3 |
3 |
3 |
4 |
4 |
4 |
5.5 |
| |
1530 |
Q |
2.28 |
2.15 |
2.04 |
1.97 |
1.92 |
1.86 |
1.80 |
1.74 |
1.69 |
| |
|
N |
1.5 |
2.2 |
3 |
3 |
4 |
4 |
4 |
4 |
5.5 |
| |
1640 |
Q |
2.51 |
2.38 |
2.62 |
2.20 |
2.14 |
2.08 |
2.03 |
1.98 |
1.92 |
| |
|
N |
1.5 |
2.2 |
3 |
4 |
4 |
4 |
4 |
5.5 |
5.5 |
| |
1740 |
Q |
2.71 |
2.58 |
2.48 |
2.41 |
2.34 |
2.28 |
2.23 |
2.18 |
2.12 |
| |
|
N |
2.2 |
2.2 |
3 |
4 |
4 |
4 |
5.5 |
5.5 |
5.5 |
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| Model and caliber |
speed r/min |
Intake volume Q under each discharge pressure |
| |
|
0.2 |
0.3 |
0.4 |
0.45 |
0.5 |
0.55 |
0.6 |
0.65 |
0.7 |
| |
|
19.6kpa |
29.4kpa |
39.2kpa |
44.1kpa |
49.0kpa |
53.9kpa |
58.8kpa |
63.7kpa |
68.6kpa |
| HSR80(80) |
1140 |
Q |
2.92 |
2.75 |
2.59 |
2.52 |
2.45 |
2.38 |
2.34 |
2.27 |
2.20 |
| |
|
N |
2.2 |
3 |
3 |
4 |
4 |
4 |
5.5 |
5.5 |
5.5 |
| |
1230 |
Q |
3.15 |
3.04 |
2.88 |
2.80 |
2.74 |
2.65 |
2.60 |
2.52 |
2.45 |
| |
|
N |
2.2 |
3 |
4 |
4 |
4 |
5.5 |
5.5 |
5.5 |
5.5 |
| |
1300 |
Q |
3.42 |
3.28 |
3.14 |
3.05 |
2.98 |
2.92 |
2.86 |
2.77 |
2.69 |
| |
|
N |
2.2 |
3 |
4 |
4 |
5.5 |
5.5 |
5.5 |
5.5 |
7.5 |
| |
1360 |
Q |
3.55 |
3.44 |
3.30 |
3.20 |
3.14 |
3.07 |
3.01 |
2.95 |
2.86 |
| |
|
N |
2.2 |
3 |
4 |
5.5 |
5.5 |
5.5 |
5.5 |
7.5 |
7.5 |
| |
1440 |
Q |
3.82 |
3.58 |
3.42 |
3.34 |
3.27 |
3.20 |
3.14 |
3.07 |
3.00 |
| |
|
N |
3 |
4 |
5.5 |
5.5 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
| |
1560 |
Q |
4.11 |
3.95 |
3.81 |
3.73 |
3.65 |
3.58 |
3.52 |
3.44 |
3.37 |
| |
|
N |
3 |
4 |
5.5 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
7.5 |
| |
1650 |
Q |
4.45 |
4.25 |
4.14 |
4.04 |
3.91 |
3.89 |
3.84 |
3.73 |
3.65 |
| |
|
N |
3 |
4 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
7.5 |
7.5 |
| |
1730 |
Q |
4.75 |
4.53 |
4.37 |
4.29 |
4.22 |
4.15 |
4.07 |
4.01 |
3.93 |
| |
|
N |
3 |
4 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
7.5 |
11 |
| HSR100A(100) |
1060 |
Q |
4.26 |
3.93 |
3.72 |
3.57 |
3.46 |
3.35 |
3.25 |
3.17 |
3.09 |
| |
|
N |
3 |
4 |
5.5 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
7.50 |
| |
1140 |
Q |
4.67 |
4.38 |
4.14 |
4.03 |
3.92 |
3.83 |
3.73 |
3.65 |
3.58 |
| |
|
N |
3 |
4 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
7.5 |
11.00 |
| |
1220 |
Q |
5.01 |
4.75 |
4.55 |
4.44 |
4.35 |
4.25 |
4.15 |
4.06 |
3.98 |
| |
|
N |
4 |
5.5 |
5.5 |
7.5 |
7.5 |
7.5 |
7.5 |
11 |
11 |
| |
1310 |
Q |
5.46 |
5.15 |
4.93 |
4.86 |
4.73 |
4.66 |
4.53 |
4.43 |
4.35 |
| |
|
N |
4 |
5.5 |
7.5 |
7.5 |
7.5 |
7.5 |
11 |
11 |
11 |
| |
1460 |
Q |
6.27 |
6.02 |
5.75 |
5.66 |
5.56 |
5.45 |
5.36 |
5.28 |
5.19 |
| |
|
N |
4 |
5.5 |
7.5 |
7.5 |
7.5 |
11 |
11 |
11 |
11 |
| |
1540 |
Q |
6.63 |
6.42 |
6.17 |
6.07 |
5.97 |
5.89 |
5.78 |
5.70 |
5.64 |
| |
|
N |
5.5 |
5.5 |
7.5 |
7.5 |
11 |
11 |
11 |
11 |
15 |
| |
1680 |
Q |
7.39 |
7.15 |
5.90 |
6.84 |
6.71 |
6.65 |
6.53 |
6.44 |
6.35 |
| |
|
N |
5.5 |
7.5 |
7.5 |
11 |
11 |
11 |
11 |
15 |
15 |
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| Model and caliber |
speed r/min |
Intake volume Q(m3/min)and required motor power N(kw) under each discharge pressure |
| |
|
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
| |
|
19.6kpa |
29.4kpa |
39.2kpa |
49.0kpa |
58.8kpa |
68.6kpa |
78.4kpa |
88.2kpa |
98.0kpa |
| HSR125A(100) |
1300 |
Q |
5.72 |
5.5 |
5.28 |
5.05 |
4.84 |
4.62 |
4.4 |
4.18 |
3.96 |
| |
|
N |
5.5 |
5.5 |
7.5 |
7.5 |
11.0 |
11.0 |
11.0 |
11.0 |
15.0 |
| |
1450 |
Q |
7.37 |
7.15 |
6.93 |
6.71 |
6.49 |
6.27 |
6.05 |
5.94 |
5.83 |
| |
|
N |
5.5 |
5.5 |
7.5 |
7.5 |
11.0 |
11.0 |
15.0 |
15.0 |
15.0 |
| |
1650 |
Q |
8.47 |
8.14 |
7.81 |
7.48 |
7.26 |
7.04 |
6.82 |
6.6 |
6.38 |
| |
|
N |
5.5 |
7.5 |
7.5 |
11.0 |
11.0 |
15.0 |
15.0 |
15.0 |
18.5 |
| |
1850 |
Q |
9.68 |
9.35 |
9.02 |
8.69 |
8.47 |
8.25 |
8.03 |
7.81 |
|
| |
|
N |
7.5 |
11.0 |
11.0 |
11.0 |
15.0 |
15.0 |
15.0 |
18.5 |
|
| HSR125B(125) |
1200 |
Q |
8.2 |
7.9 |
7.6 |
7.4 |
7.2 |
7.0 |
6.8 |
6.6 |
|
| |
|
N |
7.5 |
7.5 |
11.0 |
11.0 |
15.0 |
15.0 |
18.5 |
18.5 |
|
| |
1450 |
Q |
10.2 |
9.9 |
9.6 |
9.3 |
9.0 |
8.8 |
8.6 |
|
|
| |
|
N |
7.5 |
11.0 |
11.0 |
15.0 |
15.0 |
18.5 |
18.5 |
|
|
| |
1650 |
Q |
11.8 |
11.3 |
10.9 |
10.5 |
10.2 |
9.9 |
|
|
|
| |
|
N |
11.0 |
11.0 |
15.0 |
15.0 |
18.2 |
18.5 |
|
|
|
| |
1850 |
Q |
13.0 |
12.6 |
12.2 |
11.8 |
11.5 |
11.5 |
|
|
|
| |
|
N |
11.0 |
11.0 |
15.0 |
15.0 |
18.5 |
18.5 |
|
|
|
| HSR150C(125) |
980 |
Q |
12.4 |
12.0 |
11.6 |
11.2 |
10.8 |
10.4 |
10.0 |
9.6 |
9.3 |
| |
|
N |
11.0 |
11.0 |
15.0 |
15.0 |
18.5 |
18.5 |
22.0 |
22.0 |
30.0 |
| |
1150 |
Q |
14.4 |
13.9 |
13.4 |
12.9 |
12.4 |
12.0 |
11.7 |
11.4 |
11.1 |
| |
|
N |
11.0 |
15.0 |
15.0 |
18.5 |
22.0 |
22.0 |
30.0 |
30.0 |
30.0 |
Detailed Photos
Certifications
Packaging & Shipping
1) The equipment is equipped with a number of signs such as a product nameplate, rotation direction sign, wind direction sign, grounding sign, lifting sign, safety warnings, and so on.
2) Product nameplate mainly includes the contents of the equipment: main technical parameters (flow, pressure, motor power, Revolutions Per Minute), product number, manufacturing date, and so on, which is convenient for users to check at any time
3) Small equipment adopts the type of export wood packaging and large equipment, and the steel frame transports large cargo transportation.
4) All equipment is waterproof and rainproof.
5), Random files are placed in a moisture-proof packaging bag and are transported together with the equipment.
6) Appearance of all packaging is waterproof, moisture-proof, clean, and durable.
7) The appearance of the packaging is marked with product mark, hoisting mark, weight, etc.
8) After the equipment is packaged, they are loaded into a container or frame and transported by car to the port (train station).
9) The equipment adopts a split structure, and the outer dimensions of the packaging of the largest goods fully meet the relevant requirements of road transport and the sea.
Company Profile
Zibo Hengding Fan Co., Ltd. Is located in Industrial Park, Beijiao Town, Zhoucun District, Zibo City, Shandong Province, China. The company covers an area of 12,000 square meters and a construction area of 8,000 square meters. The company has total assets of 27 million RMB and 186 employees, 46 engineers, and technicians. It has passed ISO9001 quality management system certification and has maintained long-term technical cooperation relationships with many colleges and universities, such as Xi'an Jiaotong University, Tianjin Nankai University, and so on. Now, it has developed into a modern ventilation equipment manufacturing enterprise with first-class testing and producing equipment, high-quality and excellent production molds, strong scientific research and development strength, a strict quality management system, and gradually perfected development. The company has 15 years of production experience, with an annual output of 5,000 sets of ventilators.
With the market demand as the development direction, the company has always adhered to independent R&D and continuous innovation. Now it has developed into a modern environmental protection, and ventilation equipment enterprise, which mainly consists of mine fans, coal mine ventilators, and centrifugal ventilators. There are more than 50 series of ventilator products with more than 600 specification models, widely used in many industries, such as mines, coal mines, oil fields, chemical industry, kilns, metallurgy, boiler, textile and building materials, etc. The company's products are sold continuously with reliability in 29 provinces, cities, and autonomous regions of China, as well as Vietnam, Indonesia, Russia, Serbia, Pakistan, Kazakhstan, Tajikistan, Iraq, Saudi Arabia, and other countries.
As a manufacturer specializing in ventilation equipment, it is committed to providing superior quality products with advanced technology to customers. We will continue to make new contributions to the development of the ventilator industry based on the management philosophy of "Peng Fei''!
As a manufacturer specializing in ventilation equipment, it is committed to providing superior quality products with advanced technology to customers. We will continue to make new contributions to the development of the ventilator industry based on the management philosophy of "responsibility, teamwork, efficiency and innovation" and the enterprise spirit of "Faith determines height and quality creates brilliance".
We are willing to cooperate with all the new and old customers to create brilliance with first-class quality, reasonable prices, and a perfect service system.
General Manager Wang Baiqing warmly welcomes friends from all walks of life to visit our company for inspection and guidance.
Tel: 86-13806434669 +8615653306160
Strict quality standards, precision machining, and other spare parts and design maintain product stability, strictly select product parts suppliers, and perfect after-sales service system to allow customers to enjoy a new experience
Our company has introduced the latest research results of the Chinese Academy of Sciences, C4-II ternary flow wing twisted blades, which have high aerodynamic efficiency.
The surface of the ventilator impeller blade is sprayed with advanced super-resistant (CN) metal material to form a wear-resistant, anti-corrosion protection layer on the surface of the blade. The wear resistance of the blade surface is 10 to 50 times higher than that of the ordinary carbon steel material, thereby greatly prolonging the service life of the blade.
After we have absorbed the advantages of many domestic blade structures, based on the optimal control theory of concentrated parameters and distributed parameters, adopting the advanced ternary flow theory of impeller machinery and perfect CAD design technology, through multi-parameter control by blade bending amount, this blade is a high-performance fan blade. It ensures that the ventilator is operating in a wide and efficient area on the premise of meeting the wind volume and wind pressure.
Our company adopts computer simulation calculation and quasi-ternary flow theory, we correct the blade shape and calculate coordinate parameters of its shape, then make the core mold and the external pressure mold of the blade, and the blades are formed by hot pressing. According to a large number of experiments, the tilting blade has a larger lift-to-drag ratio than the original organic blade type and is the best choice for the airfoil blade.
The blades are welded with high-strength carbon steel material. The petiole is treated with high-quality carbon steel. So that the blade maintains the strength and rigidity of the steel blade when ensuring the corrosion resistance and wear resistance of the blade. Moreover, it effectively protects the blade from corrosion resistance and wear resistance in a humid air environment, and improves the operating life of the ventilator.
The surface of the blade is coated with a super-resistant (CN) metal material coating, which not only maintains the strength and rigidity of the high-quality carbon steel blade, but also effectively protects the blade from corrosion resistance and wear resistance in a humid air environment, and improves the operating life of the ventilator.
The petiole is forged and made of high-quality medium carbon steel, and the tempering heat treatment is performed. The root has enough transition arc to eliminate stress concentration, through reasonable and correct force analysis and calculation, the strength, and safety factor of the most dangerous section of the blade root is more than 6 times. And carry out 100% X-ray non-destructive testing for welding seams of the blade root section and the blade, and all the defects were eliminated. Therefore, the impeller has a high degree of operational safety. Since the supply of the ventilator produced by our company, there has never been an accident of the petiole breaking and flying blades.
The impeller hub is made of high-quality steel and then tempered to process heat treatment. The surface of the hub is processed into a spherical shape, the petiole hole is placed at the thickest part of the center of the rim, which reduces the friction loss of the wind flow and ensures that the force-bearing section of the hub has sufficient tensile strength and rigidity. The welded joints of the hub all adopt groove welding and carry out 100% X-ray non-destructive testing for welding seam, which ensures the safe operation of the impeller.
After the blade is formed, first sandblasting is performed to remove dirt on the surface of the blade such as welding slag and oxide layer, to show the original color of the metal; Then, using the latest international inverter pulse arc power supply and high-speed arc spray gun to paint the super-resistant (CN) metal material on the surface of the blade, to form a wear-resistant anti-corrosion protection layer on the surface of the blade. Compared with the traditional arc spraying equipment and spraying process, the coating is denser, the ultra-resistant (CN) metal material has higher bonding strength with the blade's basic body, and the service life is longer.
Quality assurance measures:
In long-term production management, our company has formed a set of standardized process control measures and control points, which can provide users with high-quality products in all directions. Our company has a good reputation and is an enterprise that users can absolutely trust.
Our company has obtained the IS09001 certification from the International Organization for Standardization (see Enterprise Qualification Materials for details). We strictly standardize the operation process and control points of product manufacturing
When the equipment of the buyer is installed, our company is responsible for on-site installation guidance, personnel training and commissioning of test-drive, The separately purchased fan accessories can be used for telephone connection guidance and debugging
Our company guarantees that the structural safety, aerodynamic performance, running noise, and appearance, quality of the supplied ventilators can be checked and accepted by relevant departments.
The buyer has the right to carry out irregular inspections on the whole machine equipment manufactured by our company to ensure provide convenience for the buyer's supervisory personnel;
Within the specified warranty period, any damage and malfunction caused by defects in product design, process or materials shall be the responsibility of our company. Our company guarantees to reply within 4 hours after receiving the buyer's notice, arriving to solve the problem within 48 hours. We will follow the principle that service work does not stop if the problem is not solved. The buyer may retain the claim for damages caused by manufacturing quality problems;
The quality assurance period for the supplied ventilator equipment, except for special provisions, is 12 months from the final acceptance of the ventilator; The warranty period for the individual parts of the fan is 6 months.
Before the expiration of the warranty period, if a problem with ventilator equipment occurs due to the manufacturing quality of our company, our company is responsible for free repair and replacement; if the problem is caused by the buyer, our company will also repair and replace it in time, and only charge its cost. ;
If out of our warranty period, our company also provides spare parts to the buyer at the most favorable price, guarantees to provide technical services for the equipment sold timely and with high quality, and the after-sales technical service is free for life, guarantees to arrive at the buyer's site for repair and technical guidance
Q. What information should I provide when inquiring?
A: Fan name/model, KW, Air pressure, Flow rate Air Volume, and temperature
Q. What is your warranty?
A. Our warranty is 18 months after receiving the fans. During the warranty period, replace the damaged parts free of charge. Out warranty period, to provide timely, high-quality technical services and price concessions spare parts to ensure.
continuous safe and high-quality equipment operation.
Q. How does your factory control product quality?
A. We have a quality inspection department. All fans are running more than 3 hours before delivery to test the quality. If there is a quality problem, we will produce a new one.
Q. What are your terms of payment?
A. TT 40% AS THE ADVANCE PAYMENT AND TT 60% AFTER INSPECTION BEFORE SHIPPING.
B. 100% IRREVOCABLE L/C AT STGHT.
Q. What products do you produce?
A. Centrifugal fan, tunnel fan, axial fan, jet fan, mining fan, exhaust fan,anti-corrosion blower, high-pressure blower, explosion proof fan, etc, welcome to contact us to learn more details.
Q. Where is your factory? Can I visit your factory?
A. Zibo Hengding Fan Co., Ltd. Is located in Industrial Park, Beijiao Town, Zhoucun District, Zibo City, Shandong Province, China.
Q. How long will it take to ship after the order?
A. 10-15 Days if you need it urgently, we can discuss it for shorting time.
Q. Is the product customizable?
A. Various types can be customizable.
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