Dry Vacuum Pumps that are water-based use water to seal and lubricate. Oil-based pumps use oils. Instead of oil or water, dry pumps use PTFE dry-polymer seals. Dry vacuum pumps may have a diaphragm that keeps the swept gas from reaching the pump’s mechanism.
Types of Wet Vacuum Pumps:
1) . Rotary Vane – Oil Seal: The rotary vane pump’s structure is strong and holds oil well for a long time. The pump is sealed by the oil. The oil also cools the vanes.
These are the industry’s best uses
- Packaging
- Papier manufacturing
- Printing
- Woodworking
2). Liquid Ring: Two moving parts make up the simple wet pump design: the shaft, and the impeller. The liquid ring pump is used for dewatering or filtration.
These are the industry’s best uses
- Vapor loads
- When a high tolerance is needed, distillation liquid carryover
- Drying
- Evaporation processes
Benefits of Wet Pumps:
- Economically priced
- Rebuilding costs less
- Resists corrosion
- Pumping speed of up to 70%
- Higher tolerance to moisture and contamination
- Preventive maintenance can increase the average lifespan between rebuilds.
What else do you need to know about wet pumps?
A wet pump has a greater contamination risk. Because the sealing fluid or lubrication oil can contaminate the gas, this is why wet pumps are more susceptible to contamination. Liquid waste must also be properly disposed.
Wet pumps also require oil changes, which can be messy. Important to note is that oil may be injected into the pump’s inlet side by its vapor point only.
Different Type of Dry Vacuum Pumps:
1). Dry Screw Vacuum Pump: This pump is a 100% dry pump with no sea fluid present in the working hamber of the pump. It is amongst the best specific ling power consumptions in the segment and capability to generate high quality consistent vacuum as per the process requirement, the other advantage that this pump offers is 100% dry pumping which leads to 100% process vapor/solvent recovery at the pump discharge at atmospheric pressure which otherwise would have not been possible.
2). Roots Vacuum Pumps: Roots Vacuum pumps also know as mechanical vacuum booster pumps are pumps that can be installed on Top of any of the above backup vacuum pumps. These are 100% dry Vacuum pumps and are popular because of their characteristic of the Bell shaped pumping speed curve that they form. To meet the high flow requirement booster pumps can be used in conjunction with other backup pumps. These pumps guarantee amongst the lowest specific power consumption and can increase pumping speeds and ultimate vacuum to the order of 10 on an average. Multiple Booster pumps can be used in series in the right staging ratio’s.
3). Claw Vacuum Pump: The claw pump design provides a high flow rate and the ability to withstand harsh industrial environments. Multiple claw pumps can be used in different speeds to increase productivity in manufacturing plants.
These are the industry’s best uses
- Molding machinery
- Packaging lines
- Pneumatic conveyors
These are the best uses :
- Packaging
- Woodworking
- Pneumatic conveyors
- Rotary screw
The Rotary Screw pumps are typically quieter than the oil-sealed, wet pumps. Variable speed drives are available to increase efficiency. It can withstand harsh environments. The rotary screw is ideal for large industrial environments that require high throughput.
These are the industry’s best uses
- Food packaging
- Glass manufacturing
- Manufacturing plastics
Benefits of Oil-less Pump:
1. Because there are no oil changes, it is low-maintenance
2. Oil seals and water seals pose no contamination risk
3. Low maintenance can lead to long-term savings
4. The dry pump does not produce any oil or water waste
5. Because of the lower maintenance, there is minimal downtime
What else do you need to know about dry pumps?
1. Purchases cost more
2. Rebuilding can be expensive
3. The system is sensitive to moisture so any moisture that is introduced could cause contamination
Different Flow Rates
Dry pumps, which are pneumatic, tend to work more efficiently than hydraulic systems that use liquid. It all depends on the application. Pneumatic is the best option if you need to process large volumes quickly. Hydraulic pumps (also known as wet pumps) are more appropriate if you need to process large loads with little room for error.
Dry Vacuum pumps are a better option in certain circumstances when it comes to compression. You may need to transport a heavy load safely to the ground, for example. The dry pump uses pneumatics, which makes it more efficient at placing the load than a hydraulic pump. It may not be as precise in timing and its movement may be slightly delayed, but it will still work. Dry pumps are more capable of adapting to load variations because air bounces back. This is a benefit over a wet pump.
