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Systèmes utilitaires Cleanroom
Pompe à vide Liquid Ring par
A base-mounted single-stage liquid ring vacuum pump for wet-gas and condensable-vapor duties, with a 290 m³/h nominal capacity, 33 mbar final-pressure basis, 7.5 kW shaft-power rating and accessible service-liquid connections.
- Single-stage liquid-ring compression
- 290 m³/h nominal capacity
- Handles humid gas and liquid carryover
Introduction de produit
The Liquid Ring Vacuum Pump is a standalone wet-vacuum machine for processes that carry condensable vapor, humid gas or limited entrained liquid. The selected purchasable basis is a Flowserve SIHI LEH 350-class single-stage, between-bearing pump assembled with one horizontal cast-iron pump body, one 7.5 kW-class TEFC motor, one flexible coupling beneath a ventilated guard and one fabricated steel base. An eccentrically mounted impeller rotates through the service liquid to form a moving liquid ring; changing cell volume draws gas through the suction port, compresses it near-isothermally and discharges the gas together with part of the liquid. The package is one pump train only: it is not the duplex receiver-and-PLC station used for ID 1927, not the dry screw machine used for ID 1928 and not a positive-pressure air compressor.
Key Features
A 290 m³/h nominal-capacity basis suits individual process vessels, vacuum dryers and utility headers with verified conductance
A 33 mbar total final-pressure basis supports industrial rough-vacuum service when service-liquid temperature and vapor pressure are suitable
Between-bearing rotor support distributes radial load across two external bearing positions for stable continuous operation
Non-contacting internal running clearances avoid metal-to-metal rubbing inside the working chamber during normal operation
Adjustable internal service-liquid return, cavitation protection, a dirt drain and a central drain support changing process conditions
A flexible coupling and ventilated coupling guard permit a standard horizontal motor-and-pump arrangement on one aligned base
Cast-iron construction is economical for water-sealed, non-corrosive service, while alternative wetted materials remain available for compatible duties
Préoccupations du client produit
Liquid-ring pump performance depends on service-liquid temperature and vapor pressure, gas composition, inlet pressure, discharge backpressure, liquid circulation and line conductance rather than nominal capacity alone.
Warm service water raises vapor pressure and can reduce available suction capacity and attainable vacuumControl service-liquid inlet temperature and flow, and use partial or total recirculation with a heat exchanger when the process heat load requires it.
Operating too close to the service liquid vapor pressure can cause cavitation, noise and internal erosionMaintain the pump above the application-specific cavitation limit and use the built-in protection or a controlled gas bleed where required.
Gas and service liquid leave the discharge together and may overload an undersized separator or drain lineSize the downstream gas-liquid separator, overflow and return path for the maximum gas and liquid load without imposing excess backpressure.
Corrosive vapor or an incompatible seal liquid can attack cast-iron wetted components and elastomersReview the full process chemistry and select stainless-steel wetted parts, compatible seals and an appropriate service liquid where needed.
Solids or deposits can obstruct port plates, the service-liquid path and internal drainsProvide suitable upstream separation, use the dirt drain during planned operation and flush the pump at intervals matched to the process load.
Pipe strain or poor motor alignment can increase coupling, bearing and seal wearSupport the suction and discharge piping independently, level the base and verify final shaft alignment after the connected piping is tightened.
Les applications typiques
Pharmaceutical vacuum drying and vessel evacuation where humid gas or condensable vapor reaches the pumpVacuum distillation, evaporation and crystallization with compatible service liquid and downstream separationFilter, centrifuge and reactor vacuum service in fine-chemical and formulated-product plantsDegassing and impregnation processes requiring steady wet-vacuum operationAutoclave and sterilizer evacuation where the selected materials and water-management arrangement suit the discharged vaporCondenser air removal and general plant vacuum duties that benefit from liquid-ring tolerance of wet inlet gas
Paramètres techniques
The locked catalogue identity is one unbranded Flowserve SIHI LEH 350-class single-stage, between-bearing liquid ring vacuum pump train. It contains exactly one horizontal deep-blue cast-iron pump housing, one internal impeller, two external bearing housings, exactly one medium-gray horizontal 7.5 kW-class TEFC motor, exactly one flexible coupling beneath one dark-charcoal perforated guard, exactly one deep-blue rectangular steel base and exactly four black mounting feet. The pump end has exactly two large DN125-class flanged gas connections on its upper half, one small stainless service-liquid inlet, one dirt-drain point and one central low drain. No separator vessel is included in the locked display identity; separation and recirculation equipment are external options. The selected manufacturer portfolio states 290 m³/h nominal capacity, 33 mbar total final pressure and 7.5 kW shaft power for LEH 350. The current LEH range page identifies single-stage between-bearing construction, service-liquid temperature up to 60°C, DN125-to-DN250 sizes, adjustable internal liquid return, cavitation protection and drain features.
| Matériaux de base | Cast-iron casing, port heads and bearing housings with stainless-steel shaft and project-compatible mechanical-seal and elastomer materials |
|---|---|
| Panneau épaisseur | 2.0 mm nominal perforated formed-steel coupling guard |
| Largeur effective | 650-850 mm typical base width for the selected pump, guard and horizontal motor arrangement |
| Longueur maximale | 1600-2100 mm typical overall base-mounted length, depending on the selected motor frame |
| Acier face épaisseur | 6-10 mm nominal fabricated-steel baseplate and equipment-mounting plate |
| Densité Core | Approximately 7100-7850 kg/m³ for the principal cast-iron and carbon-steel structure |
| Conductivité thermique | Approximately 45-55 W/(m·K) for the principal cast-iron and steel heat-path components at ambient temperature |
| surface finie | Deep-blue industrial coating on the cast-iron pump and steel base, medium-gray motor, dark-charcoal coupling guard, natural stainless-steel service-liquid fittings and black mounting feet |
| Type joint | Two DN125-class flanged gas connections, threaded service-liquid inlet, dedicated dirt drain and central low drain |
| Customisation | Disponible en fonction de l'application prévue et de l'environnement d'exploitation. |
Options disponibles
Stainless-steel or mixed-material wetted construction for corrosive gas and compatible cleaning dutiesSingle or double mechanical shaft-seal arrangement selected for the process and service liquidFresh-liquid once-through, partial-recirculation or total-recovery service-liquid systemGas-liquid separator with overflow, drain and optional plate or shell-and-tube heat exchangerAlternative motor voltage, enclosure, efficiency class and hazardous-area configurationCavitation-control gas bleed, inlet knock-out vessel or application-matched particle separatorFlexible connectors, isolation valves, vacuum instruments and base-mounted alignment accessories
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