Cement/Materials Handling

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Cement/Materials Handling

For over 60 years Lehigh Fluid Power has manufactured pneumatic and hydraulic actuators and valves for cement and aggregate handling applications. Our HDF series pneumatic cylinders, equipped with Lehigh’s exclusive Miracalube® self lubricating cylinder piston, have been proven to run 50,000,000 linear feet – years and years of service – without any major maintenance required.

These cylinders are found in Fuller bulk handling systems. Please call us if you have a Fuller part number for identification.

sales@lehighfluidpower.com Phone: 1 (800) 257-9515

HDF Actuators & Air Motors (2)

2MA Slide Valves

History of the HDF Line

HDF Heavy Duty Actuators & Air Motors

Heavy Duty Fuller cylinders in 3″, 4″ and 5″ bores, with Lehigh’s Miracalube self-lubricating piston, for Fuller bulk handling systems.

HDF

Heavy Duty Actuator

Fuller Systems Miracalube

HDF Heavy Duty Actuator

Bore: 3″, 4″, 5″
Mount: 8M or #13 trunnion
Piston: Miracalube
Application: Fuller systems

HDF design in 3″, 4″ and 5″ bores
8M or #13 front trunnion mount
Used in Fuller Handling Systems

Identify a Fuller part

HDFA

Heavy Duty Air Motor

Valve mounted HDF30 · HDF40 · HDF50

Heavy Duty Air Motor

Bore: 3″, 4″, 5″
Mount: 8M or #13 trunnion
Valve position: Conventional or jockey
Drawing: 2D-306-3a (HDF40)

HDF design in 3″, 4″ and 5″ bores
Conventional or Jockey Mount valve position
8M or #13 Front Trunnion Mounting

HDF40 Drawing (PDF)

Identify a Fuller part

Series 2MA 4-Way Slide Valves

The exclusive 2MA series pneumatic slide valve was designed specifically for Lehigh’s line of air motors.

2MA

4-Way Slide Valve

Self-cleaning Seat Dirty Environments

78FX slide valve

Speed: Up to 1,500 cpm
Seat: Metal to metal

Catalog 8201JL (PDF)

See page 40 of the Pneumatic Cylinders Catalog 8201JL for slide valve details.

How It Works

The air driven piston moves the slide and in each of its two positions, the slide opens one exhaust and one pressure port. The adjustable speed controls mounted in the exhaust orifices lead to a single exhaust port.

The oversize actuating piston assures positive breakaway action, regardless of dirt in the operating areas or low operating pressures. The slide effectively wipes the seat clean on each cycle, assuring a satisfactory seal even when used with improperly filtered air.

Speeds up to 1,500 cycles per minute
Ideal for dirty environments
Self-cleaning metal to metal seat

Construction

Piston: Corrosion resistant anodized aluminum on all valves, except 316 stainless steel on valve model 2MA57 and 2MA61E double bleed valves
Slide: Lapped manganese bronze
Valve Base: Lapped nickel plated ductile iron
Body: Anodized heat treated aluminum

History of the HDF Line

When Lehigh began manufacturing cylinder and valve combinations, the valves were mounted to the back of the end cap of the cylinders and they were called air motors. The Fuller Bulk Handling Company needed a cylinder/valve combination with a swivel mounting at the end of the cylinder, which necessitated a special manifold to mount the valve at the mid-point of the cylinder. These became air motors with the valve mounted piggy-back, as in the drawings listed in the table.

To produce a cost effective combination, Lehigh designed a special air motor for Fuller with the valve mounted on a plate on the cap end of the cylinder and hard piped the valve ports to the cylinder ports. At the same time, the design reduced the cost by eliminating the front end retainer (flange) and using a retainer ring to hold the bearing housing and rod seals in place. These cylinder/valve combinations became known as HDF30, HDF40 and HDF50, Heavy Duty Fuller Cylinders.

Original Fuller Piggy-Back Air Motors

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