Product · Vacuum & compression
Liquid ring vacuum pumps and compressors
Four vacuum pump families and a compressor series — for wastewater, chemical, paper, power and petrochemical duties, including flammable and explosive gas service.
Overview
Overview
Liquid ring machines earn their place where cleanliness is impossible and reliability is non-negotiable. They tolerate liquid carry-over, they compress close to isothermally — which matters a great deal when the gas is flammable — and they have very few things inside them that can go wrong.
Glorinda supplies four vacuum pump families and a liquid ring compressor series, all engineered and supplied under the Glorinda brand. Selection is driven by the vacuum level you need, the gas you are handling and how much abuse the machine will take.
How Glorinda products are made. Glorinda is the brand owner and the technical authority. Products carrying our name are developed under the Glorinda brand and manufactured by qualified OEM partners inside a quality-controlled supply chain that we specify and audit. We own the technical specification, the branding, the quality control and the custom product development. We do not operate our own factories, and we would rather say so than have a procurement engineer discover it during vendor qualification.
Detail
Four vacuum pump families
Designed for suction of gas and vapour in industrial processes, reaching a suction pressure of 33 mbar absolute — equal to 97% vacuum. A cavitation protection pipe protects the system during long operation near the limit vacuum. Operating as a compressor, maximum pressure is 0.26 MPa absolute. This energy-saving series is designed to replace conventional liquid ring vacuum pumps and reciprocating vacuum pumps.
Compact direct-coupled design for easy installation and space saving; stainless steel impeller with high strength for corrosion resistance and long service life; optional stainless steel wetted parts for harsh conditions. Special models are available for explosive gases and for flammable or hazardous environments.
Cone-type pumps using a conical suction and discharge port, giving a wider flow area and lower resistance than flat port designs. This structure allows energy savings of up to 18% when pumping air and 28% when pumping saturated steam. There is no metal-to-metal contact between rotor and casing, and water acts as both liquid piston and sealing medium.
The last element of the model code indicates the cone type: V1 for low vacuum, V2 for medium vacuum, V3 for high vacuum. Vacuum levels reach up to 30 mbar; for higher vacuum, a series connection with an air ejector is used.
Single-stage, single-function pumps for tough industrial conditions, with a simple structure allowing easy maintenance, high efficiency and energy saving. Suited to applications with large water discharge and changing load conditions.
H1 — clean, non-corrosive gases, creating vacuum or pressure in closed systems; with material changes it also handles corrosive gases or liquids. H2 — special PTFE valve plates reduce over-compression and lower power use; handles large amounts of condensable vapour, with a gas-water separator and inspection window. H3 — an upgraded model with 6–8% higher efficiency than earlier pumps, a lined pump body, flexible inlet and outlet connections and a large inspection port; suction capacity from 2,000 to 32,300 m³/h.
Standard packed gland sealing with mechanical seals optional; able to handle liquid carry-over and soft solids without internal damage; SUS 304 shaft sleeves and safety guards; international standard surface treatment including sandblasting and painting.
Designed on the 2SK pump and advanced German double-stage design standards, using two compression stages for stable suction at high vacuum across a wide suction range. Suction pressure range 25 mbar to 1,013 mbar absolute. Compared to single-stage pumps the DLV series offers 35–40% higher efficiency in high vacuum while using less energy, and about 15–20% less energy than traditional two-stage pumps.
Material options include carbon steel, stainless steel, duplex steel and titanium. Supply scope runs from pump head only to complete closed-cycle systems, with single or double mechanical seals and different flushing methods.
Detail
Liquid ring compressors (LRC series)
The LRC series comprises high-performance machines designed for stable and safe gas compression, developed on advanced international experience and modern hydraulic design. The compressor has a simple, compact structure, high energy efficiency and reliable operation. During compression the process is close to isothermal, which helps reduce risk when handling flammable or explosive gases.
Advantages
- Single-stage impeller with pressure up to 0.7 MPaG
- High compression ratio with stable performance
- Rear bearing positioning with adjustable clearance
- Thin oil lubrication for bearings to support higher load
- Upper suction and side discharge for easy, smooth start-up
- Bolted pump casing for safe and reliable operation
- Compact design with easy operation and maintenance
Applications
- Petrochemical — process gas compression and recovery
- Flare and torch gas systems — gas transport and recycling
- Pharmaceutical — gas handling and recovery
- Chlor-alkali — process gas compression
- Sewage treatment plants — gas transfer and compression
- Special applications — safe compression of flammable and explosive gases
Operating principle
The rotor turns inside the casing without metal contact, surrounded by a liquid piston, usually water. Centrifugal force moves water along the inner surface of the casing; because the rotor is mounted eccentrically, the chambers between the blades fill and empty once per rotation, drawing gas in through the inlet port and pushing it out through the discharge port. The water acts as both liquid piston and sealing liquid.
Detail
Materials and selection notes
Materials
The optimised pump design creates a rotating liquid zone that provides natural corrosion protection, reducing the need for special materials in many applications. Standard designs use a ductile iron rotor on a steel shaft, with a cast iron cone and casing; small pumps may use bronze rotors.
For corrosion resistance, pumps can be supplied in acid-resistant bronze, full bronze for models up to GLRP-S1-O-300, and bronze or stainless-steel options for larger models. SS304, SS316, SS316L and composite stainless and cast-iron designs are also available.
Selection
Suction capacity depends on several factors, so the model should be selected against the normal vacuum range rather than the peak. Many engineers prefer low-speed operation to improve stability and extend service life; this reduces suction capacity and energy consumption but provides operational flexibility, and if capacity has to increase later the motor can be replaced without changing the whole pump.
Performance curves are based on atmospheric air at 20 °C and approximately 50% relative humidity, with cooling water at 15 °C and a discharge pressure of 1,013 mbarA. Data tolerance is ±10%. Lower operating liquid temperature improves performance; when saturated vapour is the inlet gas, condensation in the operating liquid can further increase capacity.
Specification
Technical data
| Model | Max. suction capacity (m³/h) | Motor power (kW, 50 Hz) | Speed (r/min) | Noise dB(A) | Weight (kg) |
|---|---|---|---|---|---|
| GLRP-S1-C-V2-25 | 27 | 2P – 0.81 | 2,840 | 62 | 31 |
| GLRP-S1-C-V2-28 | 52 | 2P – 1.45 | 2,840 | 65 | 36 |
| GLRP-S1-C-V2-32 | 80 | 2P – 2.35 | 2,860 | 66 | 56 |
| GLRP-S1-C-V2-36 | 110 | 2P – 3.85 | 2,880 | 72 | 60 |
| GLRP-S1-C-V2-40 | 165 | 4P – 4.0 | 1,440 | 63 | 105 |
| GLRP-S1-C-V2-45 | 230 | 4P – 5.5 | 1,440 | 68 | 126 |
| GLRP-S1-C-V2-50 | 280 | 4P – 7.5 | 1,440 | 69 | 149 |
| GLRP-S1-C-V2-56 | 400 | 4P – 11 | 1,460 | 73 | 195 |
| GLRP-S1-C-V2-63 | 500 | 6P – 15 | 970 | 74 | 320 |
Models with the “-E” suffix are equipped with motors certified to explosion-proof class dIIBT4 / dIICT4. Source: Glorinda liquid ring vacuum pump technical profile.
| Model | Speed (r/min) | Motor power (kW) | Discharge pressure | Suction capacity (m³/min) | Water supply (m³/h) |
|---|---|---|---|---|---|
| GLRC-S1-H-P7-1 | 2,900 | 55 | 0.7 MPaG | ≥3 | 1.5–2 |
| GLRC-S1-H-P7-2 | 2,900 | 90 | 0.7 MPaG | ≥6 | 3–4 |
| GLRC-S1-H-P7-3 | 2,900 | 132 | 0.7 MPaG | ≥9 | 5–6 |
| GLRC-S1-H-P7-4 | 2,900 | 160 | 0.7 MPaG | ≥12 | 7–8 |
| GLRC-S1-H-P7-6 | 1,450 | 185 | 0.7 MPaG | ≥15 | 8–10 |
| GLRC-S1-H-P7-10 | 1,450 | 250 | 0.7 MPaG | ≥20 | 10–12 |
| GLRC-S1-H-P7-16 | 1,450 | 280 | 0.7 MPaG | ≥25 | 13–15 |
| GLRC-S1-H-P7-25 | 1,450 | 355 | 0.7 MPaG | ≥30 | 16–19 |
| GLRC-S1-H-P7-40 | 1,450 | 400 | 0.7 MPaG | ≥40 | 20–24 |
Standard materials for GLRC-1/2/3/4: pump cover HT200 or SS304, impeller SS304, separate plate SS304, pump casing SS304, shaft 45# steel, bearing gland HT200, O-ring rubber or Teflon. Non-standard products can be produced to customer requirements.
Applications
Applications and challenges
Where it applies
- Pulp and paper — black liquor evaporation, vacuum dewatering, white water systems, couch and transfer rolls
- Chemical — methane gas recovery, gas collection, exhaust compression, vapour recovery, filtration and deaeration, polyester and PVC production
- Power plants — condenser exhaust, water box priming, flue gas desulfurization, fly ash conveying, geothermal gas removal, vacuum pressure impregnation for transformers
- Petrochemical — flare gas recovery, vacuum distillation, process gas handling
- Sugar — wastewater filtration and CO₂ production
- Mining and mineral processing — vacuum transportation and material handling
- Food and pharmaceutical — vacuum drying, evaporation, concentration, filtration, degassing
- Sewage treatment — gas transfer and compression
Common challenges we are asked to solve
- Cavitation damage from sustained operation near limit vacuum
- Handling flammable or explosive gas safely
- Corrosive service destroying standard materials
- Liquid carry-over and soft solids damaging conventional machines
- Energy consumption on a continuously running vacuum system
- A reciprocating vacuum pump reaching the end of its life
FAQ
Frequently asked questions
What vacuum level can these pumps reach?
The compact/direct-coupled series reaches 33 mbar absolute, equal to 97% vacuum. The energy-optimised cone-type pumps reach up to 30 mbar; for higher vacuum, a series connection with an air ejector is used. The two-stage DLV series covers a suction pressure range from 25 mbar to 1,013 mbar absolute.
How much energy do the optimised pumps actually save?
The conical suction and discharge design gives a wider flow area and lower resistance than a flat port design, allowing energy savings of up to 18% when pumping air and 28% when pumping saturated steam. The two-stage DLV series uses about 15–20% less energy than traditional two-stage pumps and offers 35–40% higher efficiency in high vacuum than single-stage machines.
Are explosion-protected versions available?
Yes. Models with the “-E” suffix are equipped with motors certified to explosion-proof class dIIBT4 / dIICT4, and special models are available for explosive gases and for use in flammable or hazardous environments. Liquid ring compressors compress close to isothermally, which reduces risk when handling flammable or explosive gases.
What if our gas is corrosive?
Materials can be changed to suit. Options include acid-resistant bronze, full bronze up to GLRP-S1-O-300, bronze or stainless for larger models, and SS304, SS316, SS316L or composite stainless and cast-iron designs. The two-stage series is also available in duplex steel and titanium.
Can you supply a complete system rather than just the pump?
Yes. Supply scope for the two-stage series runs from pump head only to complete closed-cycle systems, with single or double mechanical seals and different flushing methods.
Evidence
Projects
Sample layout. Reference projects are being cleared for publication with the clients concerned. The structure below is final; the content is placeholder.
SampleWater reuse retrofit — sample card
Card layout for a completed water reuse project: stream data before and after, recovery achieved, scope Glorinda held, and the client's own words.
SampleZLD package — sample card
Card layout for a zero liquid discharge package: feed characterisation, evaporator type selected, solid output route, and commissioning duration.
SampleOwner's engineer mandate — sample card
Card layout for an advisory mandate: the client's decision, the options assessed, and what changed in the tender as a result.
Conversion
Take this further
Send us the stream data, the discharge limit or the equipment list you are working from. An engineer reads every enquiry and replies with the questions that actually decide the solution — not a brochure.
Downloads
Contact
Talk it through with an engineer
Send the constraint you are designing around and we will tell you what is realistic before anyone writes a specification.