Liquid Ring Vacuum Pump DVL Series

Product Overview

Key Specifications

Pumping Speed: 27 to 500 m³/h displacement across the product line.
Ultimate Pressure: Down to 3300 Pa (33mbar) for demanding continuous vacuum duty.
Motor Power: 1.1 kW to 15 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

The DVL series liquid ring vacuum pump is suitable for pumping gases and water vapor, achieving an ultimate suction vacuum

of 33 mbar absolute pressure (97% vacuum degree).

Working Principle

• Eccentric Rotor Design: The impeller is installed eccentrically within the pump casing relative to the rotor axis.
• Liquid Ring Formation: Upon startup, centrifugal force energizes the liquid to form a concentric liquid ring, receiving power directly from the impeller.
• Cyclic Gas Compression: The liquid ring and impeller blades form multiple working chambers with periodically changing volumes, drawing gas in through the suction port and discharging it after compression.
• Continuous Liquid Supply: A continuous supply of working liquid (usually water) is required to maintain the liquid ring and dissipate the significant heat generated during gas compression.

Design Features

Direct-Drive Motor: Saves space and allows for easy installation and maintenance.

Standard Mechanical Seals: Equipped with mechanical seals as standard configuration for reliable sealing.

Cavitation Protection: Features a cavitation protection port to eliminate cavitation noise and protect the pump while maximizing suction performance.

Flexible Exhaust Port: The unique PTFE design prevents over-compression, ensures peak efficiency, and significantly extends service life in tough conditions.

Technical Data

Technical Specifications	Pumping Speed（m³/h）	Ultimate Pressure（mbar）	Speed（r/min）	Motor Power（kw）	Flow Rate（L/min）	Port Size	Weight（kg）
DVL-2060	27	33	2990	1.1	4	G1"	30
DVL-2061	52	33	2990	1.5	4	G1"	35
DVL-2070	80	33	2990	3	5	G1-1/2"	56
DVL-2071	110	33	2990	4	8	G1-1/2	65
DVL-5110	165	33	1450	4	13	DIN50	108
DVL-5111	230	33	1450	5.5	16	DIN50	116
DVL-5121	280	33	1450	7.5	20	DIN65	145
DVL-5131	400	33	1450	11	30	DIN65	210
DVL-5161	500	33	980	15	40	DIN80	330
DVL-6110	165	33	1450	4	13	DIN50	150
DVL-6111	230	33	1450	5.5	16	DIN50	210
DVL-6121	280	33	1450	7.5	20	DIN65	245
DVL-6131	400	33	1450	11	30	DIN65	320
DVL-6161	500	33	980	15	40	DIN80	440

Product FAQs

1. What gases can the DVL 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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