Model 682 AURORA 680 Series “APCO-SEAL” ® SINGLE STAGE WATER SEAL PUMPS WWW.AURORAPUMP.COM SINGLE STAGE WATER SEAL PUMPS AURORA 680 Series ® Single Stage Water Seal Pumps – "Apco-Seal" Capacities to 25 GPM Heads to 180 Feet Temperatures to 190°F Discharge Sizes 1" and 1-1/2" Introduction Aurora Water Seal Units A water seal unit is a complete pumping system used with, but independent of, larger municipal or industrial pumps. Its purpose is to provide a lubrication and flushing action of clean water for mechanical seals and packing boxes in pumps handling abrasive or corrosive materials in suspension. Normally, pressure in a pump forces grit and corrosives, in the liquid being pumped, back into the stuffing box, subjecting seals or packing to early wear or service. When a water seal unit is installed, clean water, under pressure, is forced into the stuffing box thereby flushing away abrasive contaminants. Water seal units with sewage pumps are a must if packing and mechanical seal replacements are to be kept to a minimum. When a central water supply is used for sealing purposes, an air gap between the incoming water supply and the tank overflow is required to prevent contamination of the central supply. This is accomplished by the Aurora water seal unit. With your Aurora water seal unit you are getting an Aurora turbine pump. These pumps are especially designed for small flows with little change in flow over wide pressure ranges, and operate at 1750 RPM. This is not a 3500 RPM centrifugal pump running at "shut off", in its poorest operating range. All this means a system giving you reliability and long service life with top performance. For reliability plus simplicity of design, compare the features of the Aurora water seal unit before you specify. Quick Reference – Water Seal Unit Feature Selector Standard •04F or 05F turbine pumps with mechanical seals •Mechanical make up float valve •50 gallon capacity galvanized receiver with inlet, overflow and drain connections Optional •Tank cover •Electric float switch and external solenoid valve •Inlet "Y" strainer •Electric sequence changer for duplex unit •Relief valve •Isolation valve 2 The Aurora water seal unit is easy to install. Stand the unit in place, no special foundation Is required, and connect the piping to the stuffing boxes of one or more pumps. SINGLE STAGE WATER SEAL PUMPS System Features A. Direct Flow Brass Positive Shut-Off Float Valve A provides trouble-free service. Simple lever action replaces water lost due to processing, evaporation, etc. B B. 50 Gallon Galvanized Receiver inside and out prevents corrosion, eliminating the need for special coatings and is 3/16" to ensure long life. Receiver with open top includes threaded inlet, overflow and drain openings. C for minimum space requirements fits into room corner. D C. Compact Design D. Pumps Mount Directly on the Receiver E. F. No suction piping is required. Turbine Type Pump at 1750 RPM provides reliable performance. For more information concerning the 130 Series turbine pump, please refer to Bulletin 130. Covered Suction Connection F is provided for converting from simplex to duplex operation. E Model 681 illustrated Selecting Your Water Seal Unit 1. Determine the Capacity required for an installation by multipling the number of stuffing boxes being flushed by 2 GPM. 2. Determine the Pressure required for flushing a pump stuffing box by the following formula: Pressure = Vertical height + friction loss + (.8 x discharge head.) Vertical Height = Vertical distance between centerlines of suction of water seal pump and stuffing box in pump being flushed. Friction Loss = Loss in head between water seal pump and flushed pump stuffing box. Discharge Head = Discharge head of pump being flushed. 3. Make the Selection from the water seal selection chart below. Pressure psi Total Dynamic Head in Feet (GPM) Size 2 hp Size 4 hp Size 6 hp Size 8 hp Size 10 hp Size 15 hp Size 20 hp Size 25 hp 9 13 17 Water Seal Unit 1750 RPM Maximum Temperature 190˚ F 22 26 30 35 39 43 52 61 69 78 20 30 40 50 60 70 80 90 100 120 140 160 180 A04F 1/3 C04F 1/3 D04F 1/3 G05F 1/3 G05F 1/3 I05F 1/3 J05F 1/2 K05F 1/2 A04F 1/3 C04F 1/3 D04F 1/3 G05F 1/3 G05F 1/3 I05F 1/3 J05F 1/2 K05F 1/2 B04F 1/3 D04F 1/3 F05F 1/3 G05F 1/3 H05F 1/3 I05F 1/2 J05F 1/2 K05F 3/4 B04F 1/3 D04F 1/3 F05F 1/3 G05F 1/3 H05F 1/2 I05F 1/2 J05F 3/4 K05F 3/4 B04F 1/3 D04F 1/3 F05F 1/3 G05F 1/3 H05F 1/2 I05F 3/4 J05F 3/4 K05F 3/4 C04F 1/3 F05F 1/3 G05F 1/3 H05F 1/3 H05F 1/2 J05F 3/4 K05F 3/4 C04F 1/3 F05F 1/3 G05F 1/3 H05F 3/4 H05F 1/2 J05F 3/4 K05F 1 C04F 1/3 F05F 1/3 G05F 1/2 H05F 3/4 I05F 3/4 J05F 1 K05F 1 F05F 1/3 F05F 1/3 H05F 3/4 H05F 3/4 I05F 3/4 J05F 1 K05F 1 F05F 1/2 F05F 1/2 H05F 3/4 H05F 3/4 I05F 1 K05F 1-1/2 – – F05F 1/2 H05F 3/4 H05F 3/4 I05F 1 J05F 1-1/2 K05F 1-1/2 – – F05F 1/2 H05F 1 H05F 1 I05F 1 K05F 1-1/2 – – – – F05F 3/4 H05F 1 I05F 1-1/2 K05F 2 – – – – – – WWW.AURORAPUMP.COM NOTE: Refer to factory for selections not shown on chart. 3 Engineering Specifications and Dimensional Details Part Casing Impeller Impeller sleeve Inner ring Outer ring Mechanical seal Bracket Motor shaft Float valve Receiver Suction flange (model 681 only) Materials of Construction Material Cast iron ASTM A48 Bronze ASTM B82 Bronze ASTM B82 Cast iron ASTM A48 Cast iron ASTM A48 316 stainless steel metal parts, Buna-N elastomer parts, ceramic and carbon washer. Cast iron ASTM A48 Stainless steel AISI 416 Brass ASTM B-36 Galvanized steel 3/16'' hot dipped Cast iron ASTM A48 Model 04F 05F Frame 56 145T 182T Disch. 1 1-1/2 Water Seal Dimensions Pump Wgt. Receiver Wgt. 20 120 34 120 Horsepower 1750 RPM 1/3 1/2 3/4 1 1-1/2** 1-1/2 * 2** 2 * Single phase only ** Three phase only A*** B 19-9/16 3-1/16 22-5/16 3-3/4 Motor Wgt. 29 46 56 56 65 42 48 65 *** Add 2" for isolation valve The contractor shall furnish (and install in location as shown on the plan) an Aurora® type "Apco-Seal" water seal unit Model 681 (simplex) ____ – Model 682 (duplex) ____. The unit shall have an Aurora vertical flange mounted (04F or 05F) turbine type pump with a capacity of ____ GPM at ____ total head. The pump is to be bronze fitted with a mechanical seal with all metal parts of 316 stainless steel, Buna-N bellows, ceramic seat and carbon washer. The pump is to be close-coupled to ____ hertz, ____ phase, ____ cycle, ____ voltage, 1750 RPM, (drip-proof) (totally enclosed) (hazardous location) motor with a stainless steel shaft. The motor shall be designed to Aurora specifications. The pump-motor combination is to be flange mounted to a galvanized steel, open top receiver with a capacity of 50 gallons and shall be equipped with a float valve assembly. The receiver shall be provided with a drain plug and a 1" overflow below the inlet to allow an air gap to prevent back-siphonage. A 1"drain shall be furnished in the receiver. LIC E Because we are continuously improving our products and services, Pentair reserves the right to change specifications without prior notice. A-02-1028 07/30/13 © 2013 Pentair Ltd. All Rights Reserved. UT HY IT 800 AIRPORT ROAD, NORTH AURORA, ILLINOIS 60542 WWW.AURORAPUMP.COM ISO 9001 ST DR AU IN 19 17 ST EGI ER E D Q U TY SYSTEM ALI R NOTES: 1. Dimensions and weights are approximate. 2. All dimensions are in inches and may vary ± 1/8". 3. Frame sizes and motor weights are for open drip-proof motors only. 4. Conduit box is shown in approximate position. Dimensions are not specified as they vary with each motor manufacturer. 5. Add pump, receiver and motor weight for unit weight. 6. Not for construction purposes unless certified.