-
AboutThe company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
-
ProductsThe company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
-
BlogThe company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
-
CaseThe company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
-
Technical supportThe company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
-
ContactsThe company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
QSG-type heating network circulating pump
Operating temperature (T): Ambient temperature ~ +158℃
Head (H): 12–370 m
Keywords:
Category:
- Product Description
-
Overview:
To adapt to equipment upgrades focused on enhancing reliability and energy efficiency, our company has comprehensively introduced advanced technologies from both domestic and international sources and, drawing on our practical production experience, has developed the QSG series of thermal network circulating water pumps.
The pump is primarily suitable for circulating water systems in the power industry or combined heat and power (CHP) heating systems, used to convey normal-temperature and medium-temperature circulating water or high-temperature hot water. It can also be applied to other engineering applications involving the transport of normal-temperature and high-temperature liquids that do not contain solid particles.
Possesses the following advantages:
1. Effectively improve the pump’s bearing and sealing components to enhance reliability and extend service life.
2. It adopts a highly efficient and energy-saving hydraulic model with high efficiency and enhanced cavitation resistance.
3. The components have a high degree of standardization and are fully interchangeable;
4. Possesses excellent cavitation resistance and high-temperature resistance;
5. The material selection has been refined, and parts such as the bearing housing are now available in two materials: cast steel and cast iron.
Performance range:
Flow rate Q = 160–11,000 m³/h
Head H = 12–370 m
Temperature T = room temperature ~ +158℃
Model meaning:
QSG3450-70
Q—Corporate Identity
SG—Double-suction thermal network circulating water pump
3450—Rated flow is 3450 m³/h
70—Rated head is 70 m
Structural features:
The QSG pump is available in two structural types: single-stage double-suction and two-stage double-suction with both ends supported. Depending on the operating conditions, the pump casing can be either horizontally split or radially split. The radial-split design is particularly suitable for conveying high-temperature hot water; it is installed with horizontal centerline support to minimize deformation and displacement caused by thermal expansion and contraction. Based on the operating parameters, the pump body is designed with a dual-vortex chamber to balance the radial forces acting on the pump.
The pump’s suction flange and discharge flange are integrally cast with the pump body. Depending on user requirements, they can be configured as either vertical suction and vertical discharge or horizontal suction and vertical discharge.
The impeller features a double-suction design and is entirely cast, enabling it to balance axial forces. It is connected to the shaft via a keyway and undergoes dynamic balancing together with the rotor. Both the casing sealing ring and the impeller sealing ring are standard, replaceable components; their excellent fit is ensured by differences in material and hardness.
The sealed cavity can be equipped with either packing seals or mechanical seals, depending on engineering requirements.
The exterior of the sealed cavity is equipped with an optional water-cooled jacket, which is primarily suitable for conveying high-temperature hot water.
The bearing assemblies at both ends of the pump are equipped with either advanced rolling bearings or sliding bearings. When rolling bearings are used, the bearing housings at both ends of the pump are identical in size. At the coupling end, a set of radial ball bearings is installed; at the opposite end, two sets of thrust ball bearings are arranged back-to-back. The bearings are lubricated by splash oil rings using thin oil. The bearing housings are externally cast with axial cooling fins, allowing for air cooling (T < 120℃) or water cooling (T ≥ 120℃). Each bearing housing is also fitted with a plastic circular oil level indicator and an oil cup for monitoring and controlling the oil level. At both ends of the bearing housing, copper dust shields extend into the inner bore of the bearing cover, serving to prevent both dust and moisture from entering as well as to prevent oil leakage. In the unlikely event that a bearing should fail, these dust shields can still provide structural support. When water cooling is employed for the pump bearings, a water-cooling jacket is cast on the outer side of the bearing housing.
When sliding bearings are used, Babbitt alloy is selected for the bearing bush. These bearings offer smooth operation and low noise, and typically employ oil-splash rings for self-lubrication with thin oil.
Product Inquiry
Modern pump manufacturing enterprise
The company is eager to collaborate with users, foster friendships, and jointly advance our shared cause. Guided by technological innovation, we strive to ensure that our product quality consistently meets and exceeds customers’ ever-increasing demands. By leveraging advanced technologies, we aim to drive rapid enterprise growth and make an even greater contribution to the development of China’s pump industry.
Contact Us
Phone:+86-24-25350039
Phone:+86-24-25350035
Phone:+86-24-25350049
Email:qypump@qypump.com
Address: No. 328, Dongpinghu Street, Yuhong District, Shenyang City