China Standard Vacuum Self Priming Horizontal Multistage Centrifugal Water Pump with Diesel Engine with high quality

Product Description

Vacuum priming Multistage Centrifugal Water pressure Pump with diesel engine 
1. Horizontal and compact structure
2. Cartridge mech. Seal structure
3. Wet parts are stainless steel
4. Lower noise, less vibration

High-efficiency, energy-saving, wide performance range, operating safety&steady, low noise, long life and convinent installation.
DF/DM/DW type multi-stage centrifugal pump;

2)-General introduction:
This serial pump is multi-stage section centrifugal pump, the excellent hydraulic models are high-efficiency, energy-saving, and have wide performance range, operating safety&steady, low noise, long life and installing&repairing is very convenient etc. It can deliver heat water, oil, corrosive or wearalbe medium by changing the material, seal or adding cooling system.
Type DM pump can deliver the neuter mineral water which CHINAMFG particles percent <1.5%(solid Dia, <0.5mm) and other similar sewage, the temperature of the liquid is <80° C. It is suitable for steel works, mines, cities projects etc.
Type DF pump can deliver the corrosive liquid without CHINAMFG particle, which temperature is from -20° C-150° C
Type DY pump deliver oil or oil products without CHINAMFG grain, viscosity <120ct, range of temperature is from -20 ° C to 150 ° C
Inlet pressure of pumps is less than 0.6Mpa
Type DF/DM/DW is consist of stator, rotator, bearing, shaft seal:
1. Stator: The main parts are suction casing, stage casing, discharge casing and diffuser. They are screw up by poles, to become a working house. The suction direction of type D pump is horizontal, the discharge direction is upward; The discharge and suction direction of type DG pump are both upwards, and the suction direction is horizontal usually, also they can be made upward according to user’s requirement.
2. Rotor: It is consist of sharft, impellers, balance dic and shaft sleeve etc. Shaft supplied power to impellers; The axial force is balanced by balance disc; The sleeve mounted on shaft to protect shaft.
3. Bearing parts: It is consist of bearing body, bearing and bearing cover etc. The bearing of type 85-67, 155-67, 600-60 pump is sliding bearing, lubricated by diluted oil, the other pump bearing is rolling bearing, lubricated by grease.
4. Shaft seal: It is usually adopted soft packing seal, consist of sealing house on suction casing, packing, blocking water ring, the sealing hose have some pressure water, to cool, lubricate and seal pump. Type D pump pressure water is come from pump itself, type DG, DM, DF, DY pump pressure water is come from pump itself or outer water. Type DG, DF, DM, DY pump usually adopt mechanical seal.
Drive: The pump is driven directly by motor through elastic coumpling, the rotation of pump is clockwise looking from motor to pump.
1. Pump performation see sheet of performance data. The data in sheet is test performance at 1 atmosphere&nomal temperature&clean water, when the medium is high viscosity, the performance should be transormed.
2. The pump type, data, and gravity, temperature, viscosity, corrosive feature tec, must be stated in the order.
3. If you requried data is different from the data in sheet of performance Data, our company also can design according to your requirement.

specification and performance parameter
Model Capacity(m3/H) Head (M) Power(KW) Rotary speed(rpm)  
6-25×3 7.5 73.5 5.5 2950  
25-30×7 30 192.5 30 2950  
46-30×3 55 81 22 2950  
46-50×6 50 288 75 2950  
80-30×3 26 102 18.5 2950  
80-30×10 48 278 55 2950  
155-67×9 185 531 440 2950  
45-80×7 62 477 160 2950  
85-80×8 85 640 290 2950  
for more detailed specification and performance data , please contact us directly by email or call.


Max.Head: >150m
Max.Capacity: >400 L/min
Driving Type: Motor
Material: Cast Iron
Structure: Multistage Pump
Assembly: Booster Pump


vacuum pump

What Is the Impact of Altitude on Vacuum Pump Performance?

The performance of vacuum pumps can be influenced by the altitude at which they are operated. Here’s a detailed explanation:

Altitude refers to the elevation or height above sea level. As the altitude increases, the atmospheric pressure decreases. This decrease in atmospheric pressure can have several effects on the performance of vacuum pumps:

1. Reduced Suction Capacity: Vacuum pumps rely on the pressure differential between the suction side and the discharge side to create a vacuum. At higher altitudes, where the atmospheric pressure is lower, the pressure differential available for the pump to work against is reduced. This can result in a decrease in the suction capacity of the vacuum pump, meaning it may not be able to achieve the same level of vacuum as it would at lower altitudes.

2. Lower Ultimate Vacuum Level: The ultimate vacuum level, which represents the lowest pressure that a vacuum pump can achieve, is also affected by altitude. As the atmospheric pressure decreases with increasing altitude, the ultimate vacuum level that can be attained by a vacuum pump is limited. The pump may struggle to reach the same level of vacuum as it would at sea level or lower altitudes.

3. Pumping Speed: Pumping speed is a measure of how quickly a vacuum pump can remove gases from a system. At higher altitudes, the reduced atmospheric pressure can lead to a decrease in pumping speed. This means that the vacuum pump may take longer to evacuate a chamber or system to the desired vacuum level.

4. Increased Power Consumption: To compensate for the decreased pressure differential and achieve the desired vacuum level, a vacuum pump operating at higher altitudes may require higher power consumption. The pump needs to work harder to overcome the lower atmospheric pressure and maintain the necessary suction capacity. This increased power consumption can impact energy efficiency and operating costs.

5. Efficiency and Performance Variations: Different types of vacuum pumps may exhibit varying degrees of sensitivity to altitude. Oil-sealed rotary vane pumps, for example, may experience more significant performance variations compared to dry pumps or other pump technologies. The design and operating principles of the vacuum pump can influence its ability to maintain performance at higher altitudes.

It’s important to note that vacuum pump manufacturers typically provide specifications and performance curves for their pumps based on standardized conditions, often at or near sea level. When operating a vacuum pump at higher altitudes, it is advisable to consult the manufacturer’s guidelines and consider any altitude-related limitations or adjustments that may be necessary.

In summary, the altitude at which a vacuum pump operates can have an impact on its performance. The reduced atmospheric pressure at higher altitudes can result in decreased suction capacity, lower ultimate vacuum levels, reduced pumping speed, and potentially increased power consumption. Understanding these effects is crucial for selecting and operating vacuum pumps effectively in different altitude environments.

vacuum pump

Can Vacuum Pumps Be Used for Soil and Groundwater Remediation?

Vacuum pumps are indeed widely used for soil and groundwater remediation. Here’s a detailed explanation:

Soil and groundwater remediation refers to the process of removing contaminants from the soil and groundwater to restore environmental quality and protect human health. Vacuum pumps play a crucial role in various remediation techniques by facilitating the extraction and treatment of contaminated media. Some of the common applications of vacuum pumps in soil and groundwater remediation include:

1. Soil Vapor Extraction (SVE): Soil vapor extraction is a widely used remediation technique for volatile contaminants present in the subsurface. It involves the extraction of vapors from the soil by applying a vacuum to the subsurface through wells or trenches. Vacuum pumps create a pressure gradient that induces the movement of vapors towards the extraction points. The extracted vapors are then treated to remove or destroy the contaminants. Vacuum pumps play a vital role in SVE by maintaining the necessary negative pressure to enhance the volatilization and extraction of contaminants from the soil.

2. Dual-Phase Extraction (DPE): Dual-phase extraction is a remediation method used for the simultaneous extraction of both liquids (such as groundwater) and vapors (such as volatile organic compounds) from the subsurface. Vacuum pumps are utilized to create a vacuum in extraction wells or points, drawing out both the liquid and vapor phases. The extracted groundwater and vapors are then separated and treated accordingly. Vacuum pumps are essential in DPE systems for efficient and controlled extraction of both liquid and vapor-phase contaminants.

3. Groundwater Pumping and Treatment: Vacuum pumps are also employed in groundwater remediation through the process of pumping and treatment. They are used to extract contaminated groundwater from wells or recovery trenches. By creating a vacuum or negative pressure, vacuum pumps facilitate the flow of groundwater towards the extraction points. The extracted groundwater is then treated to remove or neutralize the contaminants before being discharged or re-injected into the ground. Vacuum pumps play a critical role in maintaining the required flow rates and hydraulic gradients for effective groundwater extraction and treatment.

4. Air Sparging: Air sparging is a remediation technique used to treat groundwater and soil contaminated with volatile organic compounds (VOCs). It involves the injection of air or oxygen into the subsurface to enhance the volatilization of contaminants. Vacuum pumps are utilized in air sparging systems to create a vacuum or negative pressure zone in wells or points surrounding the contaminated area. This induces the movement of air and oxygen through the soil, facilitating the release and volatilization of VOCs. Vacuum pumps are essential in air sparging by maintaining the necessary negative pressure gradient for effective contaminant removal.

5. Vacuum-Enhanced Recovery: Vacuum-enhanced recovery, also known as vacuum-enhanced extraction, is a remediation technique used to recover non-aqueous phase liquids (NAPLs) or dense non-aqueous phase liquids (DNAPLs) from the subsurface. Vacuum pumps are employed to create a vacuum or negative pressure gradient in recovery wells or trenches. This encourages the movement and extraction of NAPLs or DNAPLs towards the recovery points. Vacuum pumps facilitate the efficient recovery of these dense contaminants, which may not be easily recoverable using traditional pumping methods.

It’s important to note that different types of vacuum pumps, such as rotary vane pumps, liquid ring pumps, or air-cooled pumps, may be used in soil and groundwater remediation depending on the specific requirements of the remediation technique and the nature of the contaminants.

In summary, vacuum pumps play a vital role in various soil and groundwater remediation techniques, including soil vapor extraction, dual-phase extraction, groundwater pumping and treatment, air sparging, and vacuum-enhanced recovery. By creating and maintaining the necessary pressure differentials, vacuum pumps enable the efficient extraction, treatment, and removal of contaminants, contributing to the restoration of soil and groundwater quality.

vacuum pump

What Is the Purpose of a Vacuum Pump in an HVAC System?

In an HVAC (Heating, Ventilation, and Air Conditioning) system, a vacuum pump serves a crucial purpose. Here’s a detailed explanation:

The purpose of a vacuum pump in an HVAC system is to remove air and moisture from the refrigerant lines and the system itself. HVAC systems, particularly those that rely on refrigeration, operate under specific pressure and temperature conditions to facilitate the transfer of heat. To ensure optimal performance and efficiency, it is essential to evacuate any non-condensable gases, air, and moisture from the system.

Here are the key reasons why a vacuum pump is used in an HVAC system:

1. Removing Moisture: Moisture can be present within an HVAC system due to various factors, such as system installation, leaks, or improper maintenance. When moisture combines with the refrigerant, it can cause issues like ice formation, reduced system efficiency, and potential damage to system components. A vacuum pump helps remove moisture by creating a low-pressure environment, which causes the moisture to boil and turn into vapor, effectively evacuating it from the system.

2. Eliminating Air and Non-Condensable Gases: Air and non-condensable gases, such as nitrogen or oxygen, can enter an HVAC system during installation, repair, or through leaks. These gases can hinder the refrigeration process, affect heat transfer, and decrease system performance. By using a vacuum pump, technicians can evacuate the air and non-condensable gases, ensuring that the system operates with the designed refrigerant and pressure levels.

3. Preparing for Refrigerant Charging: Prior to charging the HVAC system with refrigerant, it is crucial to create a vacuum to remove any contaminants and ensure the system is clean and ready for optimal refrigerant circulation. By evacuating the system with a vacuum pump, technicians ensure that the refrigerant enters a clean and controlled environment, reducing the risk of system malfunctions and improving overall efficiency.

4. Leak Detection: Vacuum pumps are also used in HVAC systems for leak detection purposes. After evacuating the system, technicians can monitor the pressure to check if it holds steady. A significant drop in pressure indicates the presence of leaks, enabling technicians to identify and repair them before charging the system with refrigerant.

In summary, a vacuum pump plays a vital role in an HVAC system by removing moisture, eliminating air and non-condensable gases, preparing the system for refrigerant charging, and aiding in leak detection. These functions help ensure optimal system performance, energy efficiency, and longevity, while also reducing the risk of system malfunctions and damage.

China Standard Vacuum Self Priming Horizontal Multistage Centrifugal Water Pump with Diesel Engine   with high quality China Standard Vacuum Self Priming Horizontal Multistage Centrifugal Water Pump with Diesel Engine   with high quality
editor by CX 2023-11-27