Rolling Diaphragm Air Cylinders

Product catalog summary

Overview of Rolling Diaphragm Air Cylinders
The Rolling Diaphragm Air Cylinder is designed to convert pneumatic pressure into linear force without friction. Key features include high sensitivity, no need for lubrication, low hysteresis, no leakage, and adaptability to a wide range of temperatures. These cylinders are suitable for applications like web tensioners, valve actuators, and impact absorbers.

Diaphragm Design
The diaphragm is a flexible, durable membrane that creates a frictionless seal between the piston head and cylinder wall. Made from fabric-reinforced elastomer, it operates in temperatures from -75°F to 400°F.

Ultra Cylinders
Ultra Cylinders use rolling diaphragm seals with linear ball bearings and hardened steel rods to minimize friction and provide precise pressure response.

Modifications and Custom Devices
Standard cylinders can be customized by altering diaphragm, bearing, or rod materials. Custom diaphragm devices can be designed for high reliability and cost-effectiveness.

Operating Information
Cylinders function with plant air up to 145 psi and temperatures from -40°F to 225°F. Custom materials can extend these ranges, and modifications are available for hydraulic applications.

Materials
The cylinder shell is made from anodized aluminum or steel, with a chrome-plated steel rod. The diaphragm consists of neoprene rubber with Dacron fabric, and bearings are made from impregnated sintered bronze.

Operating Parameters
Available in single and double-acting types with various effective areas, strokes, and spring rates. Ultra cylinders include linear ball bearings for improved performance.

Ordering Information
Cylinders can be ordered by type, size, stroke, rod threads, mount type, and options like no spring or bearing.

Repair Kits
Repair kits for spring return and double-acting cylinders include diaphragms, bearings, and rod wiper rings.

Components and Kits

Cap and Diaphragm: Includes diaphragm, head, retainer adhesive, retaining screws, nuts, seal 'O' ring, and silicone tube sealant.
Double Acting Bearing Kit: Contains inner and outer bearings, rod wiper, U-cup seal, and instructions.
Ultra Cylinder Bearing Kit: Includes a linear ball bearing and instructions.

Cylinder Model and Kit Numbers
Various models are listed with corresponding diaphragm and bearing kit numbers.

Accessories

Breather Vents: Prevent contamination in single-acting cylinders, available in two sizes.
Protective Bellows: Used in no bearing or ultra cylinder applications to prevent contaminants, available in two sizes.

Warranty and Disclaimer

Products are warranted against defects for one year, with liability limited to repair, refund, or replacement.
Intended for industrial compressed-air systems only, not to exceed specified pressures and temperatures.

Applications and Engineering Assistance
ControlAir engineers are available for product performance and application inquiries.

Contact Information

ControlAir, Inc., 8 Columbia Drive, Amherst, NH 03031 USA
Website: www.controlair.com
Email: [email protected]
Phone: 603-886-9400
Fax: 603-889-1844

Catalog excerpts

Rolling Diaphragm Air Cylinders The friction free alternative

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THE “ROLLING DIAPHRAGM” AIR CYLINDER The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of our Diaphragm Air Cylinder. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force, and offer such operating features as: • • • • • MODIFICATIONS Our standard Diaphragm Air Cylinders are easily modified to meet individual customer requirements. Modifications can include, but are not limited to, diaphragm, bearing, or rod materials, rod configurations, and spring design. Our engineering staff is always...

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Friction Free Diaphragm Air Cylinders THE INSIDE STORY ON CONTROLAIR DIAPHRAGM AIR CYLINDERS Ultra Cylinder Available with Grade “A” linear ball bearings Return Spring Head Single Acting Cylinder Rod Wiper Rod Ends Choice of two different styles (SM or CA) for every size Diaphragm Retainer Piston “Floats” on diaphragm convolution Rolling Diaphragm Seal Durable fabric-reinforced elastomer Inner and Outer Bearing Made out of low friction sintered molybdenumdisulfire-impregnated bronze Rod AISI 1141 chrome plated steel with wrench flats Double Acting Cylinder Diaphragm Retainer Rod Wiper “U” Cup...

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OPERATING PARAMETERS CYLINDER MODEL S-4-L S-6-L S-9-S S-9-L S-12-S S-12-L S-16-S S-16-L S-36-S D-4-L D-9-L US-4-L US-6-L US-9-L US-12-L US-16-L EFFECTIVE AREA (sp. inches) 4 6 9 9 12 12 16 16 36 4 9 SINGLE ACTING CYLINDERS EQUIVALENT BORE STROKE (inches) (inches) 2.3 1.8 2.8 2.4 3.4 2.2 3.4 3.0 3.9 2.3 3.9 3.6 4.5 2.6 4.5 4.2 6.8 3.5 DOUBLE ACTING CYLINDERS 2.3 1.3 3.4 2.5 INITIAL SPRING FORCE (lbs.) 9 9 17 12 18 18 24 24 54 SPRING RATE (lbs/inch) 4 4 4 4 6 6 8 8 16 WEIGHTS 1.6 2.3 5.3 4.0 8.0 9.5 11.0 12.0 28 2.0 4.5 ORDERING INFORMATION DIAPHRAGM AIR CYLINDERS TYPE: S = Single Acting Cylinder...

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SMALL BORE DIAPHRAGM AIR CYLINDERS MINI MIGHTS The MiniMights offer the same friction free performance as ControlAir’s larger sized diaphragm air cylinders. These cylinders are highly sensitive with low hysteresis. They are available with threaded or unthreaded rod ends, flush or extended. MM-1 Specifications 349-180-007 Stroke 0.70” Effective Pressure Area 0.384 sq. in. Bore 0.7” Spring Load (“0” Stroke) 2 lbs. Spring Load (Max Stroke) 7 lbs. Max Operating Pressure 125 psi MM-2 349-180-009 0.70” 0.384 sq. in. 0.7” 2 lbs. 7 lbs. 125 psi Dimensions L N W D Nose Mount Thread Size Rod Diameter Rod...

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REPAIR KITS Repair kits and replacement components are available from stock. All ControlAir kits and components are completely interchangeable with similar competitive cylinders already in the field. The repair kits consist of the following: Spring Return Diaphragm Kit 1. Diaphragm 2. Adhesive Disk 3. Cap Retainer Sealing Nuts (2) 4. Instructions Spring Return Bearing Kit 1. Inner Bearing 2. Outer Bearing 3. Rod Wiper Ring 4. Instructions Double Acting Diaphragm Kit 1. Diaphragm, Cap 2. Diaphragm, Head 3. Retainer Adhesive, Cap 4. Retainer Adhesive, Head 5. Retaining Screws 6. Nuts, Cap Retainer...

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ACCESSORIES Breather Vents — Are used to prevent contamination from being drawn into the air relief port on the side of the cylinder head during the return stroke of the single acting cylinders. The BVF consists of a 40 micron bronze filter and is installed by threading into the side relief port. To order: BVF-1 Fits cylinder sizes 4, 6, 9. 1/4" pipe tap. BVF-2 Fits cylinder sizes 12, 16, 36. 3/8" pipe tap. Protective Bellows— Are used for No Bearing or Ultra Cylinder applications to prevent contaminants from being drawn in through the cylinder head. The flange of the bellows is trimmed to accommodate...

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