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                        Water Management Systems and Products 

Page 13 

4 Specifications 

Sand and Gravel Automatic Backwash Filters 

 

Model SGM-250A is equipped with automatic valves operated from a time device so that backwash is accomplished 
periodically on an automatic basis. 

 Dimensions 

in. 

(cm) Shipping 

Pressure 

Model L  W  H weight  differential 

number in. 

cm 

in. 

cm 

in. 

cm 

lbs. 

Kg 

backwash 

c

 

SGM-250A 40 

101 

48 

122 

39 

99 

1,800 

818 

SG-250P

 

c

  Model SGM-250P. Automatic valves are operated from pressure switch. Pressure switch monitors the pressure drop in the filter 

media and activates backwash cycle at preset pressure drop. 

 

Centri-Separator Systems 

Note:

  Not to be used for closed-loop or chilled water systems; back flushing eliminates chemicals added to the system. 

  

Dimensions 

 

  

in. 

(cm) Shipping 

Model  

weight 

number Description  in. 

cm 

in. 

cm 

in. 

cm 

lbs. 

Kg 

 

  150-ton (

453,600 Kcal/hr

) tower maximum 

29 

74

 19½

50

 26 

66

 130 

60 

CSM-150 

 

  300-ton (

907,200 Kcal/hr

) chiller maximum 

29 

74

 19½

50

 26 

66

 130 

60 

 

  400-ton (

1,209,600 Kcal/hr

) tower maximum 

26 

66 

20 

51 

41 

104

 150 

69 

CSM-400 

 

  800-ton (

2,419,200 Kcal/hr

) chiller maximum 

26 

66 

20 

51 

41 

104

 150 

69 

 

BFS Series Bag Filters 

 

Note:

  Can be used for full flow or bypass. 

 

Max. flow 

No. filter bags 

Pipe size 

Model 

c

 gpm  lpm 

required supplied 

inches 

mm  

BFS-30 30 

113 

1 3 

1½” 

NPT 

38 mm 

BFS-65 65 

246 

1 3 

2½” 

NPT 

63 mm 

BFS-90 90 

340 

1 3 

2½” 

NPT 

63 mm 

BFS-200 200 

757 

1 3 

3” 

(flanged) 

76 mm (flanged) 

BFS-300 300 

1,135 

2 6 

4” 

(flanged) 

102 mm (flanged) 

BFS-450 450 

1,703 

3 12 

5” 

(flanged) 

127 mm (flanged) 

c

  Single cell filters include bypass, pressure gauges and 25 micron filter bags. Multi-cell filters include pressure gauges and 25 micron 

filter bags. 

 

SWF Series Full Flow Stainless Steel Filters 

 

Maximum working pressure is 

100 psi

 (

689.5 kPa/6.895 bars

); 150 psi (

1,034.25 kPa/10.343 bars

) is available. 

 

Maximum operating temperature is 110ºF

 (

43ºC

). Consult factory for higher temperatures. 

 

 

Maximum flow 

Connection size/flange 

Model 

cd

 gpm 

lpm 

inches 

mm  

SWF-100 100 

378 

2” flange 

51 mm flange 

SWF-200 200 

757 

3” flange 

76 mm flange 

SWF-350 350 

1,325 

4” flange 

102 mm flange 

SWF-750 750 

2,839 

6” flange 

152 mm flange 

SWF-1300 1,300 

4,920 

8” flange 

203 mm flange 

SWF-2000 2,000 

7,570 

10” flange 

254 mm flange 

c

 

80 mesh screen size is standard for stainless steel strainer basket. 40 mesh can be used for tower water. 

Specify mesh size

.

 

d

 

Valving and bypass are 

not

 included with SWF Series stainless steel filters. 

Summary of Contents for BFS

Page 1: ...ystems SGM 250A Sand and Gravel Filter CSM Centri Separator BFS Bag Filter SWF Full Flow Strainers Product Manual Sterling Inc 2900 S 160th Street New Berlin WI 53151 Tel 262 641 8610 Fax 262 641 8653 Part Number A0568850 Revision C Bulletin No SC7 600 4 ...

Page 2: ...ed to a continuing program of product improvement Specifications appearance and dimensions described in this manual are subject to change without notice Copyright Sterling Sterlco 2008 All rights reserved Effective 4 14 2008 Part No A0568850 Revision C Bulletin No SC7 600 3 ...

Page 3: ...S Disconnect and or lock out power before servicing or maintaining the system Use care when LOADING UNLOADING RIGGING or MOVING this equipment Operate this equipment within design specifications OPEN TAG and LOCK ALL DISCONNECTS before working on equipment You should remove the fuses and carry them with you Make sure that system equipment and components are properly GROUNDED before you switch on p...

Page 4: ...ion 2 2 In the Event of Shipping Damages 2 3 If the Shipment is Not Complete 2 4 If the Shipment is Not Correct 2 5 Returns 3 Installation 10 3 1 Installing the Sand and Gravel Filter 3 2 Installing the Centri Separator System 3 3 Installing the BFS Series Bag Filter 3 4 Installing the SWF Series Full Flow Stainless Steel Filter 4 Specifications 13 5 Operation 14 5 1 Sand and Gravel Automatic Back...

Page 5: ...ped in a by pass configuration and is supplied with an integral pump electrically operated ball valve and controls A timer can be preset at any interval to automatically purge the separator The CSM Centri Separator is available for cooling tower systems up to 400 tons and chiller systems up to 800 tons BFS bag filters use a 25 micron bag to filter suspended solids in either a by pass or full flow ...

Page 6: ...alled in a bypass line so that plugging of the filter or temporary shutdown required for back washing does not hinder process operation 1 3 Centri Separator Filter Systems Sterling Sterlco centrifugal separation systems are used on cooling tower or chilled water systems requiring large capacity heavy duty suspended solids removal The Centri Separator System CSM 150 is designed to handle up to 150 ...

Page 7: ...inless steel filters feature 304 stainless steel construction of filter housings strainer baskets and flanges Maximum working pressure is 100 psi 689 5 kPa 6 9 bars 150 psi 1 034 5 kPa 10 3 bars is available Maximum operating temperature is 110ºF 43ºC consult the factory for higher operating temperatures 80 mesh screen size is standard for the stainless steel strainer basket 40 mesh can be used fo...

Page 8: ...of the Shipper ends at the time and place of shipment The Carrier then assumes full responsibility of the shipment Notify the transportation company s local agent if you discover damage Hold the damaged goods and packing material for the examining agent s inspection Do not return any goods to Sterling Sterlco before the transportation company inspection and authorization File a claim against the T...

Page 9: ... Re inspect the container and packing material to see if you missed any smaller items during unpacking Determine that the item was not inadvertently taken from the area before you checked in the shipment Notify Sterling Sterlco immediately of the shortage 2 4 If the Shipment is Not Correct If the shipment is not what you ordered contact the parts and service department immediately at 262 641 8610 ...

Page 10: ... a fork lift truck when moving the unit to avoid damage Installing the Unit Be sure that piping to the unit has a bypass circuit The bypass circuit allows for removal of the unit for servicing without interrupting water service Always run piping full size at 1 NPT approx 38 mm Connect the entering water connection of the filter unit to the process supply and the leaving connection to the tank Use ...

Page 11: ...ion The location you select must also have an open drain to a sewer for purging and a 110 volt electrical source Use a fork lift truck when moving the unit to avoid damage Installing Piping Be sure that piping to the unit has a bypass circuit The bypass circuit allows for removal of the unit for servicing without interrupting water service Part of your Centri Separator system includes a three foot...

Page 12: ... on filter housing Solids will collect inside the bag filter preventing spill over when the bag is removed Always run piping full size Filter housing maximum operating pressure is 150 psi 3 4 Installing the SWF Series Full Flow Stainless Steel Filter Selecting an Installation Site Place the unit on a suitable and level foundation preferably a concrete floor or pad and near the pump for best operat...

Page 13: ...20 51 41 104 150 69 BFS Series Bag Filters Note Can be used for full flow or bypass Max flow No filter bags Pipe size Model c gpm lpm required supplied inches mm BFS 30 30 113 1 3 1 NPT 38 mm BFS 65 65 246 1 3 2 NPT 63 mm BFS 90 90 340 1 3 2 NPT 63 mm BFS 200 200 757 1 3 3 flanged 76 mm flanged BFS 300 300 1 135 2 6 4 flanged 102 mm flanged BFS 450 450 1 703 3 12 5 flanged 127 mm flanged c Single ...

Page 14: ...n screw Rotate the complete assembly until the red arrow is pointing to the rib on the pressure box 6 00 position The timer will now back wash for six minutes Important Make sure gears are engaged before tightening screw Y A D F O E M I T M ANUAL E M I T N O I T A R E N E G E R DAY REGENERATION For manual regeneration move lever in direction of arrow as far as it will go then release 1 Set skipper...

Page 15: ...here are three layers of filter media First starting from the bottom place 200 lbs of x round gravel Second place 300 lbs of x 1 8 round gravel and third the top final layer place 700 pounds of 20 filter sand Anode Replacement On top of the filter housing is a sacrificial anode made of magnesium Inspect and replace when it has depleted 5 2 Centri Separator System The CSM 150 and CSM 400 require a ...

Page 16: ...e drainage port valve which is piped to an open drain will need to be opened to purge the debris from the reservoir Over time one should be able to accurately determine how often the valve should be opened Do not allow the debris to collect beyond the capacity of the reservoir An optional automatic purge valve is available to open based upon an adjustable time cycle Periodically inspect and ensure...

Page 17: ...se models with a band clamp replace the band clamp around the strainer cover and housing latching the T bolt Then push the latch handle towards the filter housing The T bolt latch does not need adjustment when installed It is set at the factory for proper clamp compression Bolted cover models require a torque sequence as follows 12 00 to 6 00 3 00 to 9 00 11 00 to 5 00 and 2 00 to 7 00 Bolt torque...

Page 18: ... 3183 or call 262 641 8610 Emergencies after 5pm CST call 847 439 5655 We have a qualified service department ready to help Service contracts are available for most of our products www acscustomerservice com Sales Department Call 262 641 8610 Monday Friday 8am 5pm CST Our products are sold by a world wide network of independent sales representatives Contact our Sales Department for the name of the...

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