Vacuum Systems

Hybrid Steam Ejector + Liquid Ring Vacuum Systems

Name: Ohm Engineers
Address: Plot No. 348, G.I.D.C. Manjusar-Savli, Vadodara, Gujarat, 391775, IN
Telephone: +91 83470 19128/22

Ohm Engineers supplies hybrid combination vacuum systems — multi-stage steam jet ejectors with liquid ring vacuum pump backing — for deep, stable vacuum down to approximately 0.5 Torr with lower utility risk than ejector-only trains at the deepest pressures.

ASME PTC 24 · HEI · Hybrid ejector + LRVP packages

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Hybrid Steam Ejector & Liquid Ring Vacuum Systems

Key applications

Refinery vacuum distillation unit (VDU) backingSolvent recovery under deep vacuumMulti-effect evaporator vacuum trainsChemical process vacuum where steam and power utilities are mixed

Working principle

Hybrid vacuum system architecture

Primary stages use motive steam to compress process vapour to an intermediate pressure. A liquid ring vacuum pump provides the final compression to atmosphere, improving stability and reducing motive steam at very low suction pressures.

Entrainment ratio (ejector stages)

Rm = Ws / Wm

Sized per stage in the ejector train.

Operating envelope

Engineering specification matrix

Indicative ranges for RFQ discussion — not guaranteed catalogue limits.

Design parameter	Standard range	Heavy duty / custom	Compliance
Ultimate suction	1–10 Torr	~0.5 Torr	Process datasheet
Utility comparison	Lower steam than deep ejector-only	Site-specific utility survey	Engineering offer
Backing pump	Liquid ring vacuum pump	Dual backing options	Manufacturer data on RFQ

Metallurgy

Materials & chemical compatibility

Material of construction is taken from the purchaser datasheet and feed corrosion profile — not assumed from a catalogue default. Mill test certificates for pressure-boundary materials are supplied per the agreed ITP.

Material

SS 316L

Solvent recovery and pharma vacuum

Material

Carbon steel

Refinery VDU and chemical vacuum

Also quoted when specified

Carbon steelSS 304SS 316LOther alloys when specified

Design standards

ASME PTC 24 (when specified)HEI (when specified)

Documentation

MTC for pressure parts
As-built drawings
Hydro test records

Fabrication

Built for this product at Vadodara

Skid-mounted packages assembled at Vadodara with inter-stage condensers and instrumentation as specified.

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Hybrid Vacuum Systems fabrication at Ohm Engineers, Vadodara

Project proof

Verified installations

Chemical / adhesives

Gujarat, India

Chemical plant vacuum systems

Multi-stage steam jet vacuum ejector systems and thermal vapor recompression packages.

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FAQ

Technical answers — Hybrid Vacuum Systems

How does a hybrid system compare to ejectors only?: Hybrids reduce motive steam at very low suction pressures and improve stability by using a liquid ring backing pump. Send suction load, pressure and available utilities for a stage-by-stage comparison on the offer.
When should I specify a hybrid instead of ejectors only?: When suction pressure must be held below ~1 Torr with stable operation, or when motive steam availability is constrained. Send suction capacity, pressure, and available steam conditions on the RFQ.

Engineering RFQ

Request an engineering quotation — Hybrid Vacuum Systems

Process parameters below help our engineers qualify the duty before reply. Or email info@ohmengineers.co.in · +91 83470 19128/22

I have a full datasheet — open complete engineering RFQ →

WHAT TO SEND

Arrangement: Multi-stage steam jets + intercondensers + liquid ring backing pump
Ultimate suction: Defined per process datasheet — hybrid sizing not catalogue-rated
Utilities: Motive steam, CW temperature and power per site survey
Process datasheet or purchaser drawing if available
Design code and inspection requirements (ITP)

RESPONSE TIME

We reply by email. If data is incomplete, we list missing fields before commercial offer. Engineering review is not an instant catalogue price.

+91 83470 19128/22