Gas ejectors for two-stage liquid ring vacuum pumps

Transcription

1 Gas ejectors for two-stage liquid ring vacuum pumps GOV 3, GOV 3 GPV 0... GPV 63 Operating pressure: Suction volume flow: to 80 mbar 0 to 00 m³/h CONSTRUCTION TYPE Sterling SIHI gas ejectors are simple and sturdy vacuum gas ejectors with following particular characteristics: Adaptable to different operating conditions by adequate material selection Simple installation into the suction line of liquid ring vacuum pumps Low noise service which is free of maintenance and deficient in vibration NOTE The characteristics of the suction volume flow of the gas ejectors depend on essentially on the suction capacity of the liquid ring vacuum pump and therefore on the vapour pressure ant temperature of the service liquid used. To meet with the different conditions, we offer construction series. APPLICATION Sterling SIHI gas ejectors extend the operating range of liquid ring vacuum pumps so that lower absolute pressures become possible (to 8 mbar). Fields of application are e.g.: Chemistry and pharmacy for distilling and degassing Electric industry for impregnation and drying Service liquid: water up to 5 C water up to 30 C Suction pressure: mbar mbar Series: GOV 3, 3 GOV 3, 3 GPV 0-60 GPV 3-63 In case of particularly low suction the gas ejector GPV 5 is available. Service liquid: water 5 C Suction pressure:... mbar Plastics industry for degassing etc. The gases to be handled may be vapour saturated or aggressive. Sterling SIHI gas ejectors are used wherever the vacuum attainable by a liquid ring vacuum pump is not sufficient and where danger of running in cavitation is immenent for the liquid ring vacuum pump. Even if the suction side of the ejector is closed, the liquid ring vacuum pump is protected against cavitation. POLLUTION CONTROL: To reduce the exhaust blast the motive gas can be removed from the separator. The standard combinations described in this catalogue list are optimal in view of suction volume flow, power absorption and service charges. Other combinations of gas ejectors and liquid ring vacuum pumps can be applied. Details on request. VACUUM TECHNOLOGY GPV G E 05/05

2 Material design MATERIAL DESIGN Item COMPONENTS Casing Venturi tube holder * Insert ring Motive nozzle hard rubber Venturi tube In case of material design 88 the venturi tube holder is not in contact with the medium handled. * only in case of material design 88 Sectional drawing

3 Technical Data Suction pressure range to mbar Service liquid temperature up to 5 C gas ejector + liquid ring vacuum pump pump speed rated power of the motor of the liquid ring vacuum pump pressure at a suction volume flow = zero make-up water requirements in m 3 /h KB difference in temperature C rpm kw mbar 5 GPV 5 + LPH abt FB Suction pressure range 8 to 0 mbar Service liquid temperature up to 5 C gas ejector + liquid ring vacuum pump pump speed rated power of the motor of the liquid ring vacuum pump GOV 3 + LOH pressure at a suction volume flow = zero make-up water requirements in m 3 /h KB difference in temperature C rpm kw mbar 5 GOV 3 + LOH GPV 0 + LPH 5008 FB GPV 0 + LPH GPV 50 + LPH GPV 50 + LPH GPV 60 + LPH GPV 60 + LPH Suction pressure range 0 to 80 mbar Service liquid temperature up to 30 C gas ejector + liquid ring vacuum pump pump speed rated power of the motor of the liquid ring vacuum pump pressure at a suction volume flow = zero make-up water requirements in m 3 /h KB difference in temperature C rpm kw mbar 0 5 GOV 3 + LOH GOV 3 + LOH GPV 3 + LPH GPV 3 + LPH GPV 33 + LPH GPV 53 + LPH GPV 53 + LPH GPV LPH GPV 63 + LPH GPV 63 + LPH FB = make-up liquid service KB = combined liquid service, service liquid 0 C, 5 C or C warmer than the make-up water The make-up water flows refer to the lowest suction pressure indicated. In case of increasing suction pressure these figures decrease. FB The values indicated suction volume flow are valid for compression of dry air of 0 C from suction pressure to atmospheric pressure (03 mbar). Service liquid for the liquid ring vacuum pump also indicated is water to a temperature of 5 C resp. 30 C. The motive air for the gas ejector has a pressure of abt. 03 mbar. Motive and handling gases with physical characteristics which deviate from those of air, service water with other temperatures than those indicated, as well as other service liquids than water cause a change in suction capacity, which can be determined by Sterling SIHI on request. 3

4 Performance graph of the combinations Suction pressure range: to mbar for service liquid temperatures up to 5 C suction volume flow [m³/h] GPV 5 + LPH 5530 speed: 50 rpm suction pressure [mbar] 000 Suction pressure range: 8 to 0 mbar for service liquid temperatures up to 5 C 000 suction volume flow [m³/h] GPV 60 + LPH 6537 GPV 60 +LPH 6530 GPV 50 + LPH 5530 GPV 50 + LPH 553 speed: 900 rpm speed: 50 rpm GPV 0 + LPH 536 GPV 0 + LPH 5008 GOV 3 + LOH 5309 GOV 3 + LOH suction pressure [mbar] For the suction volume flow the tolerance is 0 %.

5 Performance graph of the combinations Suction pressure range: 0 to 80 mbar for service liquid temperatures up to 30 C 000 suction volume flow [m³/h] GPV 63 + LPH 6537 GPV 63 + LPH 6530 GPV LPH 5530 GPV 53 + LPH 5536 GPV 53 + LPH 553 GPV 33 + LPH 536 GPV 3 + LPH 53 GPV 3 + LPH 5008 GOV 3 + LOH 5309 GOV 3 + LOH 5007 speed: 900 rpm speed: 50 rpm suction pressure [mbar] For the suction volume flow the tolerance is 0 %. 5

6 Dimension table N = gas-inlet, N = gas-outlet, TG = motive gas inlet series + N / N TG b e w w eight in kg for material design size 8 88 GOV 3 GOV 3 DN 3 * G / GPV 0 G / GPV 0 G 3/ GPV 3 DN 0 35 GPV 3 G / 5 38 GPV GPV 50 G GPV 50 DN 3 * GPV 5 DN 50 GPV 53 GPV 53 GPV 533 G GPV 60 7 GPV 60 DN 65 DN 5 * GPV 63 8 GPV 63 * Flange suitable for counter-flange according to DIN 558 Flange connections according to DIN 50 PN 0 DIN 558 PN 6 DN k D d x number 8 x 8 x 8 x x x d s Example for ordering: G P V series size material design casing sealing On delivery the point ( ) in the fourth place of the type code is replaced by a letter in the factory. Any changes in the interest of the technical development are reserved. Sterling SIHI GmbH Lindenstraße 70, D-55 Itzehoe, Germany, Telephone +9 (0) , Fax +9 (0)