CLARK MASTS - ST SERIES

THE SMALL CLARK MAST OF RUGGED CONSTRUCTION USING NON-ROTATABLE KEYED TUBE SECTIONS HAVING A 76 MM (3") DIAMETER BASE TUBE

The need for the ST Series is sometimes questioned. It is justified as a smaller 4-section version of the PT Series. It is considerably sturdier than the QTM Series and has keyed tube sections, thus making it possible to rotate the headload by simply turning the mast. A special DAF version, equipped as a field mast, is also available, details shown HERE.

The ST Series of telescopic masts, though smaller in section diameter and headload capacity than their heavier brothers (but larger than the more commonly used QTM masts), have the same sturdy features of construction as their larger brethren. The aluminium alloy base tube diameter of all ST masts is 76 mm (3"). They have a maximum of 4 tubular sections which carry a full length keyway to prevent relative section rotation at both intermediate and full extension positions. These masts are usually extended by a Clark low voltage Power-Pack (compressor/controller) such as the Model 30, however a hand pump or vehicle air can be used. Their small internal volume makes extension rapid, from 15 to 45 seconds, depending on extended mast height. They are ideal for vehicle mounted applications where the antenna or other headload to be lifted is not heavy or bulky, is fixed in one position or rotated through rotation of the entire mast. Now composed of the same basic components as the PT Series, the new 4-section ST Series is the solution.

The top of each mast section is fitted with a light alloy rotating collar which carries adjustable nylon bearing pads that form the upper bearing surface to allow guyed mast rotation. Good rigidity when fully extended is achieved by use of an expanding collet ring fitted within the tube overlap. As with all Clark air-operated masts, a moulded rubber seal fitted to each piston ensures a high standard of sealing under all environmental conditions. The base of each mast is fitted with a pressure relief/drain valve and an air inlet connector. Clamp (locking) Collars for semi-permanent erection, even after the air supply has been removed, can be factory fitted as an optional extra.

A full range of Vehicle, Shelter and Field mounting accessories is available for Clark's ST masts, e-mail GFS Electronics for full details and pricing.

	Brief ST Specification Mast Sections: Heat Treated aluminium alloy. Castings: Die cast aluminium alloy LM6. Finishes: Fittings - zinc plated and passivated. Paint - standard colour white. Other colours to special order, including NATO Green. Mast sections anodised natural finish. Operating Temperatures: +55 degrees C to -40 degrees C dry. Max working Pressure: 1.8 bar (25 lbs/sq.in).

ST Mast Series mounting accessories

An EMC van with internally mounted Clark air-operated ST series mast.

Clark Model 30E or 30A Compressor/Mast Controller Units
can be used to provide erection/retraction control of most small Clark Masts.

Australian/Asia-Pacific distributors & service agents: GFS ELECTRONICS, PO Box 97, Mitcham, Victoria, 3132, Australia. 196 Jumping Creek Road, Wonga Park, Victoria, 3115, Australia. Phone +61 3 97222206 Fax +61 3 97222405

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Quick Jump Index to various Clark Mast portable masting Series
QTM Classic Series	QT P & PX Series	ST Series	DAF Field Mast Series	Air Supply Equipment
PT Series	YT Series	WT Series	XT Series	802 Trailer Mounted Series
804 Heavy Duty Trailer Mounted Series	Mast Accessories	Defence Force Range	Clark Teklite Portable Lighting Range	Contents Page