PNEUMATIC DRIVEN LIQUID PUMPS - Haskel International

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1. DriveSection2. HydraulicCheckValves3. DriveCyclingValveA n a t o m y o f a P n e u m a t i c D r i v e n P u m p1. Drive SectionThe piston, complete with “O” ring seal, operates in an epoxy filled,fiberglass wound barrel, the diameter of which is constant throughouta given series of pumps. Drive media forces the piston down on thecompression stroke and raises it on the suction stroke (M series have aspring return). The piston is pre-lubricated during assembly and thereforeno air line lubricator is necessary.2. Hydraulic Section/Check ValvesThis is directly linked to the drive piston by the hydraulic piston, thebottom portion of which is in the hydraulic body. Outlet flow and pressureare determined by the area of the hydraulic piston head, its nominalratio with the drive piston head, and drive pressure. On the down stroke,liquid in the hydraulic section is forced under compression through theoutlet check valve. Fresh liquid is induced via the inlet check valve onthe return stroke. These check valves control the flow of liquid throughthe hydraulic section. They are spring-loaded and have a very lowcracking pressure, allowing maximum opening on the induction stroke.The pressure of hydraulic fluid on the down stroke closes the inlet checkvalve and acts against the spring to open the outlet check valve.3. Drive Cycling ValveThis is a pilot-operated, unbalanced, lightweight spool, which directsdrive pressure, first to the top of the drive piston, and then to theunderside to reciprocate the piston (cycle). It actuates via pilot valves atthe top and the bottom of the stroke, which causes the unbalanced spoolto shift and reciprocate the piston.4. Hydraulic Seal/Check ValvesThis is one of the few wear parts. Its function is to allow the hydraulicpiston to reciprocate without passing fluid into the drive section. The liquid,its pressure and its temperature determine seal specification. A distancepiece can be incorporated between drive and hydraulic sections forcomplete contamination-free operation on most <strong>Haskel</strong> pumps.4. HydraulicSeal/CheckValve4 www.haskel.com
P u m p S e l e c t i o n I n f o r m a t i o nAll <strong>Haskel</strong> pumps are identified by letters coding the type ofpump, followed by a number indicating the practical working ratioPump Model Letter Codingof the drive area to the hydraulic plunger area. These letters areexplained in the chart below.M .875” stroke .33 hp miniature pump series XH 2” stroke 1.5 + 2 hp Extreme High Pressure pump seriesS Stainless steel hydraulic piston and body G 4.5” stroke 6 hp pump series29723 .33 hp Chemical Pump 8 4.5” stroke 8 hp pump or booster seriesD (Prefix) Pump incorporates a Distance Piece 14 4” stroke 10 hp pump seriesD (Suffix) Double Acting pump W Polyurethane U-cup dynamic seal4B 1” stroke .75 hp pump series (bottom inlet only) F UHMWPE (Ultra-high Molecular Weight Polyethylene Dynamic SealA 2” stroke 1.5 + 2 hp pump series T Reinforced teflon dynamic sealH 2” stroke 1.5 + 2 hp High Pressure pump series V Viton o-ring static seal-C Filter, regulator with gauge and shut-off/speed control valve -B Bottom inlet-CP Chemical PumpQ u i c k M o d e lC o m p a r i s o nC h a r tThe chart to the right showsthe pressure/flow capabilityof each pump in the range.The diagonal lines showconstant output horsepowerfor each series. The modelratios are circled.ExampleThe pressure required is2175 psi (150 bar). The flowrequired is 215 cubic inches(3.52 liters) per minute. Theblack dot plots position. Onlymodels on diagonals to theright of the dot will meet thedemand; e.g., the -35 ratio1.5 hp pump, assuming asupply at 100 psi (7 bar) and70 scfm (119m 3 /hr) can bemet; if not, a -32 or -52 2 hppump would be needed.Note: For specific performancecurves, refer to Liquid PumpRapid Reference Guide.The diagonal horsepower lines in the chart below are based on 100 psi (7 bar) drive pressure.Drive flow requirement is different for each series as follows:.33 hp 15 scfm (25 m 3 /hr) 3 hp 85 scfm (144 m 3 /hr).75 hp 45 scfm (76 m 3 /hr) 6 hp 175 scfm (297 m 3 /hr)1.5 hp 70 scfm (119 m 3 /hr) 8 hp 225 scfm (382 m 3 /hr)2 hp 85 scfm (144 m 3 /hr) 10 hp 270 scfm (459 m 3 /hr)Reduced air drive flow or pressure will result in a corresponding reduction in output horsepower.This chart can be used to select pump series and model ratio.Flow (liters/min)0.1K100.001.50.2K0.5K1KPressure (psi)2K5K10K20K50K100K600049.17 3 hp12300046 hp251.5 hp16.39 35 401000106560 1008.20 515 22125500.75 hp2510 hp7143225 351008 hp213.28 352252001210153037 60 72.33 hp1.64 2156100100360.8210015050300 4520.33 1102 hp 200.16 10527175601221001501881502022253153026026839031373Flow (cu in/min)0.08 56.9 13.8 34 69 138 345 690 1379 3448 6900www.haskel.comPressure (bar)5
Page 6 and 7: P e r f o r m a n c e a n d S p e c
Page 13 and 14: Optional Modifications (for 2 hp, 2
Page 16: P o w e r S y s t e m S p e c i a l
Page 19 and 20: 29723-21, 29723-36, 29723-71, 29723
Page 21 and 22: Net weight 18 kgBoxed weight 19 kgB
Page 23 and 24: 8 h p ( 5 . 9 7 k W ) P u m p M o d

PNEUMATIC DRIVEN LIQUID PUMPS - Haskel International

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