Liquid Ring Vacuum Pump DVE Series

Product Overview

Key Specifications

Pumping Speed: 460 to 4000 m³/h displacement across the product line.
Ultimate Pressure: Down to 3300 Pa (33mbar) for demanding continuous vacuum duty.
Motor Power:15 kW to 110 kW.
Cooling System: Water is used as the working medium for cooling.
Shaft Sealing: All Mechanical Seals.

Design & Features

Robust & Efficient Design: Features a single-stage, single-acting structure that is simple, easy to maintain, reliable, and energy-efficient.
Liquid Ring Principle: Operates based on the liquid ring principle to deliver stable and consistent vacuum performance.
Eccentric Impeller: The impeller is installed eccentrically within the pump casing, transferring power to form a concentric liquid ring.

Typical Applications: Laboratory Vacuum、Soil Purification、Liquid Degassing、Food Processing、Vacuum Packaging、Solvent Recovery、Extraction、Leather Manufacturing.

Description

Specifications

Reviews

Product Introduction

DVE series liquid‑ring vacuum pumps adopt single‑stage single‑action structure. Featuring simple construction, easy maintenance, advanced technology, high vacuum degree and reliable operation.

Working Principle

• Main Components: DVE series liquid‑ring vacuum pumps mainly consist of round pump body, eccentric impeller, disc and end covers.
• Liquid‑ring Formation: The rotating impeller generates a liquid ring within the elliptical pump body. The working liquid serves as sealing, compression and cooling medium, requiring no wear‑parts or lubrication.
• Working Principle: Thanks to the eccentric impeller arrangement, liquid reciprocates between impeller blades similar to pistons inside cylinders, to suck and compress gas media.
• Suction Process: At suction phase, the liquid ring moves away from the hub, drawing gas axially through the suction port.
• Discharge & Vacuum Generation: At discharge phase, the liquid ring moves toward the hub, expelling gas axially from discharge port to create vacuum.
• Make‑up Liquid Supply: External pipelines continuously feed make‑up liquid to replenish liquid carried away by discharged gas.

Design Features

• Top‑mounted steam‑water separator: Saves space and effectively reduces noise.

• Bush: Fabricated from high‑chromium stainless steel to extend service life.

• Castings: All resin‑sand cast and annealed.

• Pump body: Multiple material options, processed by high‑precision CNC machining.

• Unique flexible exhaust port: Avoids over‑compression to deliver optimal efficiency within performance range.

• Cavitation‑protection port: Eliminates cavitation noise while maximizing suction performance and protecting the pump.

• Imported bearings : Stabilize impeller‑disk clearance, ensure accurate impeller positioning for stable and continuous operation.

Technical Data

Table‑listed performance parameters are based on 20 ℃ saturated air suction, 15 ℃ water as working liquid and 1013 mbar exhaust pressure.

Technical Specifications	Pumping Speed（m³/h）	Ultimate Pressure（mbar）	Speed（r/min）	Motor Power（kw）	Flow Rate（L/min）	Port Size	Weight（kg）
DVE-152	460	33	1450	15	28	DIN100	480
DVE-153	600	33	1450	18.5	32	DIN100	530
DVE-202	720	33	980	22	35	DIN125	875
DVE-203	1080	33	980	37	43	DIN125	1065
DVE-252	1700	33	740	45	75	DIN150	1690
DVE-253	2400	33	740	75	86	DIN150	2210
DVE-303	3200	33	560	75	135	DIN200	3200
DVE-303	4000	33	740	110	135	DIN200	3200

Product FAQs

1. What gases can the DVE pump handle?
Gases and water vapor, reaching up to 33 mbar abs. (97% vacuum).

2. How does it prevent cavitation damage?
A standard cavitation protection port eliminates noise and protects internal components.

3. Is it suitable for corrosive environments?
Yes. It features a standard SS impeller, with full SS wet parts available for harsh conditions.

4. What ensures its high efficiency and long life?
A unique PTFE flexible exhaust port prevents over-compression and maximizes durability.

Performance Curves

The above performance curves are obtained under the following conditions: suction medium of saturated air at 20°C, water as the

working liquid at 15°C, and an exhaust pressure of 1013 mbar.

Dimensions

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