Vacuum Catalogue - Edwards

Stokes 61B Series Process Isolation BoostersStokes 61B series process isolation boosters are designed to be used in conjunction withrotary-piston, dry vacuum, rotary vane and liquid ring pumps to increase pumping speed atworking pressures and shorten pump down time significantly. It incorporates fivemechanical seals for optimum protection from dust and particulate contamination. It alsoincludes an integral by-pass valve enabling the booster to start from atmosphere,eliminating the need for a vacuum pressure switch to ensure continuous operationregardless of vacuum level. The Stokes 61B series can be mounted separately or on theinlet of the backing pump to create a compact integrated package.8Page370Features & Benefits●●●●●Mechanical shaft seal – improved life and serviceabilityRingfeder® keyless gear locking system – stronger, faster timingLarge shaft diameters – allowing improved performance at highpressuresBelt drive or direct drive capabilityVertical or horizontal gas flowDimensionsTechnical DataDisplacementV belt (2750 rpm) 3375m 3 h -1 / 2000ft 3 min -1Direct drive (3000 rpm) 3685m 3 h -1 / 2170ft 3 min -1Direct drive (3600 rpm) 4420m 3 h -1 / 2600ft 3 min -1Inlet/outlet flanges8” ASA/ANSI flangeMotor power EU/Asia18.5kWMotor power US TEFC 25 hpBy-pass availableYesCooling water 7.6 - 11.4l min -1 / 2 - 3gal min -1Oil capacity (horizontal flow) 1.9 litre / 4.1galOil capacity (vertical flow) 4.1 litre / 8.8galMax temp rise 135°C / 275°FMax discharge temp 191°C / 375°FWeight bare shaft284kg / 625lbsWeight TEFC direct drive 538kg / 1185lbsRecommended OilV- Lube HOrdering InformationProduct Description61B 5HR CE 18.5kW, 230/400V, 3-ph, 50Hz @ 3000rpm61B 5HR CE 18.5kW, 200-220/380V, 3-ph, 50/60Hz @3000/3600rpm61B 5H25, 25hp, 230/460V, 3-ph, 60Hz @ 3600rpm61B 5HR (Bare Shaft) Horizontal flow61B 5V25, 25hp, 230/460V, 3-ph, 60Hz @ 3600rpm61B 5VR (Bare shaft) Vertical flowOrder No.90061B5HR60190061B5HR60290061B5H2590061B5HR90061B5V2590061B5VR61B 5VR CE 18.5kW, 230/400V, 3-ph, 50Hz @ 3000rpm90061B5VR60161B 5VR CE 18.5kW, 200-220/380V, 3-ph, 50/60Hz @3000/3600rpm90061B5VR602Accessories & SparesOrder No.Replacement 6" booster Mseal - seal kit 607552001Replacement 6" booster - maintenance kit 607552002Process isolation seal kit 607552004A 8" pipe flange connection 13 1/2" (343 mm) OD x 8” (203 mm) ID 8 x 3/4-10 NC-2B x 11/8" (29 mm) holes straddle both CL both flangesB DIA. Holes1. STD Inlet 2. Optional feetShop online at www.edwardsvacuum.com