Catalogs > Industrial Controls Catalog > Condition Sensing Switches and Controls > Float

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1 Condition Sensing Switches and Controls Catalogs > Industrial Controls Catalog > Condition Sensing Switches and Controls > Float FLOAT Introduction Standards Compliance and Certifications Introduction Technical Data Ordering Information Product Selection Modifications Accessories Approximate Dimensions Product Selection Style AType 4 Style A Tank or Sump Operation Maximum Horsepower Ratings Type 1 Enclosure Single-Phase 2 or 3-Phase AC DC AC Type 4 Enclosure (Fiberglass Polyester) Type 7 & 9 Enclosure 115V 230V 115V 230/460/575V 32V 115V 230V A1 840-A4 840-A7

2 Style BType 1 Style B Tank or Sump Operation Maximum Horsepower Ratings Type 1 Enclosure Single-Phase 2 or 3-Phase AC DC AC Type 4 Enclosure (Fiberglass Polyester) Type 7 & 9 Enclosure 115V 230V 115V 230/460/575V 32V 115V 230V B1 840-B4 840-B7 Styles D & DSType 1 Style D Tank or Sump Operation Maximum Horsepower Ratings Type 1 Enclosure Single-Phase AC 2 or 3-Phase AC DC 115V 230V 115V 230/460/575V 32V 115V 230V

3 D1 Style DS Tank or Sump Operation Maximum Horsepower Ratings Type 1 Enclosure Single-Phase AC 2 or 3-Phase AC DC 115V 230V 115V 230/460/575V 32V 115V 230V DS1 Style A devices are supplied with 1 N.O. and 1 N.C. contact. For 2 N.O. contacts, add Suffix Code 1 to the catalog number. For 2 N.C. contacts, add Suffix Code 2 to the catalog number. Class I Groups C, D. Class II Groups E, F, G Float Operator Assemblies A Float Operator Assembly must be included with the basic device for the float switch to operate. Select and specify a catalog number that meets your requirements. Select modifications and accessories to the Float Operator Assembly from tables on Ordering Modifications. All Allen-Bradley Float Operator Assemblies come equipped with a number of plated steel or stainless steel assembly parts to allow wall or floor mounting and to accommodate different tank or sump depths. The plated steel and stainless steel assembly parts are made of the material listed in the table below. Operator Assembly Parts Material Stainless Steel Assembly Part Material 3/8 in. Rod Two 3 ft tubes (Type 304) with coupling (Type 303) Cable 15 ft Cable, (Type 304) Stop Collars Type 303

4 Float Type 304 Single Arm Lever Float is fixed to one end of the rod. Adjustable stop collars at top of the rod operate the switch. The rod may need guides to stabilize vertical float movement. Because of the unlimited number of possible mounting arrangements, guides must be provided by the user. See maximum rod lengths table below. Base-Mounted Stainless Steel Operator Assemblies include the following: Two 3 ft lengths of 3/8 in. tubing with coupling Two adjustable stop collars One fixed stop collar (with 840-1BCE only when required) Type Style Stainless Steel 1 A,D,DS A 840-1AD B F 840-1BCE

5 4 A A 840-1AD B F 840-1BCE 7 & 9 A A 840-1AD B F 840-1BCE Floor-Mounted Stainless Steel Operator Assemblies include the following: 20 in. of 1 in. pipe Two 3 ft lengths of 3/8 in. tubing with coupling Two adjustable stop collars One fixed stop collar (with Cat. Nos BC1, -2B47, -2C47 only when required) Floor mounting bracket Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A A 840-2A1 B F 840-2BC1

6 4 A A 840-2A47 B F 840-2B47 7 & 9 A A 840-2A47 B F 840-2B47 Maximum Rod Lengths Style A B Stainless Steel 9 ft 18 ft D, DS 9 ft See Float Size Table,. Double Arm Lever The double arm has a counterweight to offset weight of rod and float. The float moves up and down between stops on the rod so that large changes in liquid level only move the rod a short distance. Top of the rod is fixed to switch lever. The rod may need user-provided guides to stabilize vertical float movement. See Maximum Rod Lengths table below. Base-Mounted

7 Stainless Steel Operator Assemblies include the following: Half Arm Lever (when required) Double Arm Lever Counterweight Two 3 ft lengths of 3/8 in. tubing with coupling Three adjustable stop collars One fixed stop collar Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A A 840-6A1 B F 840-6BCE 4 A A 840-6A1 B F 840-6BC47 7 & 9 A A 840-6A47 B F 840-6BCE47 Floor-Mounted

8 Stainless Steel Operator Assemblies include the following: Half Arm Lever (when required) Double Arm Lever Counterweight Floor mounting bracket 20 in. of 1 in. pipe Two 3 ft lengths of 3/8 in. tubing with coupling Three adjustable stop collars One fixed stop collar Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A A 840-7A1 B F 840-7BC1 4 A A 840-7A1 B F 840-7BC1 7 & 9 A A 840-7A47 B F 840-7B47 Double Parallel Arms Used with unguided rods up to 33 ft long. The float moves up and down between stops on the rod so that large changes in liquid level only move the rod a short distance. Parallel levers keep the rod vertical and help limit sideways movement. Top of the rod is fixed to switch lever. See Maximum Rod Lengths table below. Base-Mounted

9 Stainless Steel Operator Assemblies include the following: Additional Double Arm Levers Counterweight Two 3 ft lengths of 3/8 in. tubing with coupling One adjustable stop collar One fixed stop collar Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A A 840-8A1 B F 840-8B1 4 A A 840-8A4 B F 840-8B4 7 & 9 A A 840-8A47 B F 840-8B47 Floor-Mounted

10 Stainless Steel Operator Assemblies include the following: Additional Double Arm Levers Counterweight Floor mounting bracket 20 in. of 1 in. pipe Two 3 ft lengths of 3/8 in. tubing with couplings One adjustable stop collar One fixed stop collar Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A A 840-9A1 B F 840-9B1 4 A A 840-9A4 B F 840-9B4 7, 9 7, 9 A 840-9A47 B F 840-9B47

11 Maximum Rod Lengths Style Stainless Steel A, B 33 ft See Float Size Table, Float Size Table. Double Arm Lever, Double Pulley A cable runs over a self-supported double pulley. The cable has a float fixed at one end and a counterweight at the other end. Adjustable stop collars on the cable move the switch operating lever. Base-Mounted Stainless Steel Operator Assemblies include the following: Double Pulley Bracket 15 ft cable/cast iron counterweight assembly Two adjustable stop collars Switch ordered separately. See Product Selection.

12 Type Style Stainless Steel 1 B F 840-4BC1 4 B F 840-4B4 7 & 9 A A 840-4A47 B F 840-4BC47 Floor-Mounted Stainless Steel Operator Assemblies include the following: Double Arm Bracket Floor mounting bracket 20 in. of 1 in. pipe 15 ft cable/cast iron counterweight assembly Two adjustable stop collars Switch ordered separately. See Product Selection. Type Style Stainless Steel

13 1 B F 840-5BC1 4 B F 840-5B4 7 and 9 A A 840-5A47 B F 840-5B47 Double Arm Lever, Single Sheave Wheel Used with Style A switch only. A cable runs over a single pulley mounted on top of float switch. The cable has a float fixed at one end and a counterweight at the other end. Adjustable stop collars on the cable move the switch operating lever. Base-Mounted Stainless Steel Operator Assemblies include the following: Pulley Assembly 15 ft cable/cast iron counterweight assembly Two adjustable stop collars

14 Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A A 840-4A1 4 A A 840-4A4 Floor-Mounted Stainless Steel Operator Assemblies include the following: Pulley Assembly Floor mounting bracket 20 in. of 1 in. pipe 15 ft cable/cast iron counterweight assembly Two adjustable stop collars Switch ordered separately. See Product Selection.

15 Type Style Stainless Steel 1 A A 840-5A1 4 A A 840-5A4 See Float Size Table, Float Size Table. Single Arm Lever, Separate Pulleys A cable runs over two pulleys which are separate from the switch. The cable has a float fixed at one end and a counterweight at the other end. Adjustable stop collars on the cable move the switch operating lever. Base-Mounted Stainless Steel Operator Assemblies include the following: Two pulleys for separate mounting 15 ft cable/cast iron counterweight assembly Two adjustable stop collars

16 Switch ordered separately. See Product Selection. Type Style Stainless Steel 1 A, D, DS A 840-3AD B F 840-3BCE 4 A A 840-3AD B F 840-3BCE 7 & 9 A A 840-3AD B F 840-3BCE See Float Size Table below. Float Size Table Type Sphere Diameter Elongated Sphere Diameter x Length A 6 in. F 7 in. x 12.5 in. Note: Float size dimensions do not imply that Float Operator Assemblies can be interchanged.