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2BE4(2BEC) series liquid ring vacuum pump and compressor, with its superior performance, becomes the preferred equipment of coal mine gas pumping system, and has the following unique advantages compared with other vacuum pumps.
The compression process of gas is isothermal compression, so the pump is suitable for pumping and compressing flammable, explosive and toxic gases. It is very suitable for long-term continuous operation, especially for coal mine gas extraction and other extremely harsh working conditions, and is widely praised by the industry.
The NASH 2BE4 is an upgrade of Nash's proven 2BE3 pump series: Optimization of the shaft bearings increases pump flexibility in the event of operational malfunctions and ensures better lubrication, which extends the service life. Modifications of port plates and impeller and improvements to internal flow channeling reduce the energy requirements up to 6 to 8%. An optional connection for flushing the housing is also available, improving cleaning and increasing the service life.
Designed to operate in demanding environments like the paper, power, mining and chemical process industries, these pumps offer durability and reliability at a low cost of operation. Each model is equipped with an application-proven polyisoprene-lined body for added corrosion & erosion resistance. For more aggressive applications, stainless steel, stainless steel lining and epoxy coated components are available.
The unique inlet configuration allows for both top and side inlet arrangements to accommodate low headroom installations. In installations where space is limited, the top discharge capability of the NASH 2BE4 allows the use of a top mounted discharge separator that saves floor space and eliminates the need for a trench.
NASH 2BE4 pumps allow efficient operation over the entire vacuum range without the need to change the pump's internals. When equipped with a center shroud, split vacuum operation up to 330 millibar differential can be achieved. Large inspection ports allow easy access to pump internals for inspection and maintenance.
The NASH 2BE4 series offers capacities ranging from 2,500 to 33,000 m³/hr down to 160 mbar abs. (as a vacuum pump) and from 3,000 to 9,500 m³/h up to 2.5 bar abs. (as a compressor).
| Features | Benefits |
| Polyisoprene lined pump body | Superior corrosion resistance |
| Stainless steel components available | Added corrosion resistance, application flexibility |
| Multiple inlet & discharge configurations | Piping flexibility |
| Top discharge capability on 2BE4 models | Eliminates need for trench, minimizes floorspace |
| Self-recirculating capability on 2BE4 models | Eliminates need for a pressurized external seal water source |
| Center shroud: Split vacuum capability | Installation flexibility, minimizes number of pumps |
| Variable porting | Handles entire vacuum range without changing pump internals |
| Unique internal construction | Minimizes scale build-up |
| Large inspection ports | Easier internal inspections |
| Double extended shafts | Additional installation choices |
| 100% performance tested prior to shipment | Trouble-free startup and operation |
| 2 years warranty and over 100 years of experience | Peace of mind |
| Basic Specifications | |
| NASH 2BE4 | |
| Vacuum range | to 160 mbar abs. (4.7 in HgA) |
| Shaft seals | Stuffing box (standard), mecanical sealy single, double (on request) |
| Differential pressure capability | ~ 1.2 bar (17.4 psi) |
| Compressor pressure | 2.5 bar abs. (22 psig) |
| Suction capacity | 2,500 to 39,000 m³/hr (1,500 to 23,000 CFM) |
| Construction | Ductile iron, stainless steel, |
| Materials | combination of both materials |
Q: What information should I offer for an inquiry?
A: You can inquire based on the model directly, but it is always recommended that you contact us so that we can help you to check if the pump is the most appropriate for your application.
Q: Can you make a customized vacuum pump?
A: Yes, we can do some special designs to meet customer applications. Such as customized sealing systems, speical surface treatment can be applied for roots vacuum pump and screw vacuum pump. Please contact us if you have special requirements.
Q: I have problems with our vacuum pumps or vacuum systems, can you offer some help?
A: We have application and design engineers with more than 30 years of experience in vacuum applications in different industries and help a lot of customers resolve their problems, such as leakage issues, energy-saving solutions, more environment-friendly vacuum systems, etc. Please contact us and we'll be very happy if we can offer any help to your vacuum system.
Q: Can you design and make customized vacuum systems?
A: Yes, we are good for this.
Q: What is your MOQ?
A: 1 piece or 1 set.
Q: How about your delivery time?
A: 5-10 working days for the standard vacuum pump if the quantity is below 20 pieces, 20-30 working days for the conventional vacuum system with less than 5 sets. For more quantity or special requirements, please contact us to check the lead time.
Q: What are your payment terms?
A: By T/T, 50% advance payment/deposit and 50% paid before shipment.
Q: How about the warranty?
A: We offer 1-year warranty (except for the wearing parts).
Q: How about the service?
A: We offer remote video technical support. We can send the service engineer to the site for some special requirements.
Suppliers with verified business licenses
Audited Supplier 
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