PT & YT SERIES
Australian Distributors: Portable Masts Australia Pty Ltd - Contact Details

The Clark Masts PT Series (the first of this series being the PT1) were the very first air operated Clark Masts portable masts to be developed by Alec Clark, and now form part of Clark Masts Phase 2 Series. The early air-operated PT Series telescopic portable masts featured heavy aluminium alloy construction, anodised for corrosion and ware resistance, keyed tube sections enabling the PT portable mast to be turned, adjustable bearing surfaces for long life, 114.3 mm (4") base tubes and a coned ring system for rigidity when fully extended. Today's Clark Masts PT Series portable masts still carry these features plus torsional locking and other improvements. Like all Clark Masts air-operated telescopic portable masts, extension is by low pressure Air Supply, maximum pressure is 1.8 kg/cm³ (22 psi). PT series portable masts can be operated from various air sources, including 12 or 24 volt DC Air Source/Mast Controllers, 230 volt AC Compressors, Petrol Compressors, handpump or even a vehicle's own compressed air supply if available.

From their introduction in the late 1950's the original Clark Masts PT portable masts were immediately attractive to organisations involved in television field strength measurement and for radio/television news reporting vehicles. Today, they are still the first choice for these applications and more, including aerial photography, emergency service communications and radio/cellular site surveying.

The base of each Clark Masts portable 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. All Clark Masts PT series portable masts are supplied with guy rings and mounting hardware for turning or non-turning applications.

Clark Masts have a wide range of Mounting, Guying and Air Accessories available for the PT portable mast series, including Vehicle Roof Mounting Trolleys and field mounting Tripods.

Clark Masts PT Portable Mast  Series Table of Models	PT Masts can also be field mounted using the PT Field Kit

Full Technical Data on the PT series is shown here

Clark Masts commercial/industrial range of Phase 2 masts can also be supplied in a militarised form, such as this model PT15, 5 metre air-operated portable mast with a 30 Kg headload capability.

The Clark Masts YT Series of portable telescopic masts is a development of the PT, however it features a 127 mm (5") diameter base tube (the PT has a 114.3 [4"] base) which increases their weight and height capacity. In other respects the YT series portable masts is essentially the same as the PT portable mast range.

Both the PT and YT form part of Clark Masts Phase 2 series and are available with plain (non-locking) guide collars for low retracted height or locking (combined) collars, used for long periods of extension and/or without a continuous air supply. There is also a very full range of accessories available for easy installation in a wide variety of vehicles and shelters. In addition the Clark Masts YT Series portable masts may be tripod field mounted and guyed using Clark Masts Accessories.

Clark have a number of Air Supply options available for these portable masts, including allowing the use of a vehicle's in-built air supply, hand pumps, a petrol powered compressor and 12, 24 volt DC or 230 volts AC Air Source/Mast Controllers.

Clark Masts YT  Series  Portable Masts Table of Models

BRIEF PHASE 2 PORTABLE MAST  (PT, YT, WT & XT SERIES)  MECHANICAL SPECIFICATIONS Telescoping sections: High strength Corrosion-resistant Aluminium Alloy. Surface Finish: Anodised natural colour or dyed. General Finish: Standard paint colour - white or NATO green. Other colours, including desert sand, to order. Maximum Operating Air Pressure: 1.7 bar (25 psi or 1.8 Kg/cm sq.). Operating Temperature: +55 degrees to -40 degrees C (dry). Storage Temperature: +65 degrees to -55 degrees C (dry). Icing Risk: Similar to any other mechanical device in conditions of temperature change between +3 and -5 degrees C. Without precautions 5%. With precautions <1%. Air Leakage: Expected pressure drop: Zero to 0.4 bar (0 to 6 psi). Environmental Conditions: Clark masts have been tested extensively in nature's test house for Tropical Life, Salt Atmosphere, Dry Heat, Damp Heat, Driving Rain, Shock, Vibration as well as High and Low Temperatures. Further more, by following simple procedure there are no limitations for transport in unpressurised aircraft. Quality Assurance Standards: AQAP 120 including ISO 9002.

SOME OF THE VEHICLE MOUNTING OPTIONS AVAILABLE FOR CLARK MASTS PHASE 2  PORTABLE MASTS INCLUDING THESE PT AND YT MASTS

Full Technical Data on the PT series is shown here
Next section, WT Series Masts
Go to Phase 2 Series Information
Clark Mast General Accessories
Clark Mast Mounting and Guying Information
Equipment for Air Supply
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