2sk-12 Double Stage Liquid/Water Ring Vacuum Pump

2SK Pump Description:

The 2SK series two-stage water ring vacuum pump and the 2SK-P₁ series two-stage water ring vacuum pump—air injection pump unit are high-performance vacuum pumps designed for applications requiring high vacuum levels and fast evacuation speeds. These units feature a compact structure, reliable performance, and ease of assembly and disassembly, developed in accordance with the JB/TQ354-84 standards for water ring vacuum pumps and compressors.

This unit includes a single-stage air injection pump and a two-stage water ring vacuum pump, which can be used separately if required by the client. It is suitable for pumping air and other non-corrosive gases that are insoluble in water and free from solid particles, making it ideal for achieving high vacuum in sealed vessels.

Working Principle:

The working principle of the two-stage water ring vacuum pump is illustrated in the figure below. When the eccentrically mounted impellers inside the pump body rotate, water is thrown outward due to centrifugal force, forming a rotating water ring between the inner surface of the pump body and the impeller. As the impeller rotates clockwise, the inner surface of the water ring gradually moves away from the hub during the first half of the rotation, creating a cavity that draws in gas through the crescent-shaped suction port. During the second half of the rotation, the water ring approaches the hub, causing the cavity to shrink and compress the gas, which is then expelled. This process continues, gradually evacuating the gas and creating a vacuum within the vessel.

The air injection pump operates as a jet injector. When the two-stage water ring vacuum pump creates a certain level of vacuum in the evacuated container, the atmosphere pump is connected when maximum vacuum is reached. At this point, air or pressurized gas is rapidly drawn into the pipe due to the pressure difference between the air and the intake pipe. The flow rate increases after the air exits the nozzle, reducing the pressure and allowing for a higher vacuum level than the pump itself. This process continues, drawing More gas into the pump.

The structural diagram of the two-stage water ring vacuum pump with a capacity over 1.5 m³/min is shown in Figure 2. The longer impeller (17) and shorter impeller (16) are fixed to the shaft (2) using pins, and a shaft sleeve (20) and a round nut are used to lock them together, forming the rotor. The two impellers are installed eccentrically within the pump body and supported by two single-row radial ball bearings. The rotor is connected to the motor shaft via a coupling (18), allowing it to rotate with the motor. The longer impeller, longer pump body, and suction part form the high-vacuum segment, while the shorter pump body, shorter impeller, and discharge part form the low-vacuum segment. The outlet of the high-vacuum section is connected to the inlet of the low-vacuum section via a communication pipe. The two segments are separated by intermediate walls (A) and (B), with the latter having an intake port. The 2SK series two-stage pumps are sealed at both ends.

Water is supplied to the high-vacuum segment through a water inlet hole, while the low-vacuum segment is supplied by the high-vacuum segment. For the 2SK-12A, 2SK-20A, and 2SK-30A models, some of the make-up water is also provided from the water supply pipe, but it needs to be regulated using valves. The high and low-vacuum segments are secured together using draw-in bolts. The air injection pump consists of an inlet air pipe, jet nozzle, air valve body, and diffuser.

Technical Specifications of 2SK Series Two-Stage Water Ring Vacuum Pumps

Technical Specifications of 2SK-P₁ Series Two-Stage Water Ring Vacuum Pump – Air Injection Vacuum Pump Unit

Packaging and Shipping

Packaging:

1. Standard export polywooden cases.

2. Customized packaging is available upon request.

Shipping Methods:

FAQs

1. Q: Are you a manufacturer or trading company?

A: We are a manufacturer of vacuum pumps and water pumps based in China since 1986.

2. Q: What is your MOQ?

A: One set is acceptable.

3. Q: What are your payment terms?

A: T/T, Western Union, etc.

4. Q: What certifications do you have?

A: CE, ISO 9001, etc.

5. Q: What about the warranty?

A: 12 months warranty from the date of delivery.

6. Q: What is the delivery time?

A: Delivery time varies depending on the model, motor specifications, and material. Please confirm with our sales team for exact details.

7. Q: Can you do OEM branding?

A: Yes, we welcome OEM orders.

8. Q: Is the quality reliable?

A: We have a complete testing system controlled by micro-machines, and performance curves can be sent to clients before delivery.

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