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HPA Series

Liquip offers a range of Polyflex hydrant Pits that are light weight and have been designed to exceed the extremely high loads and standards set down by the aviation industry.

  • Liquip Polyflex Hydrant Pit is one quarter the weight of conventional pits,and provides a non-conductive, seamless, advanced-sealing pit.

  • Comes complete with a lightweight lid which offeres easy maintenance and improved product retention in case of spills or drips.

  • The HPA series provides an environmentally sealed container for aircraft runways where fuelling and inspection access is required.

  • Body is electrically non-conductive, consumes no cathodic protection power and the sloped bottom ensures fluid build-up in the pit is drained to one side so it is immediately noticeable and easier to clean.

Materials
Pit body: High density polyethylene, non conducting
              UV stabilised for outdoor storage
Pit rim & Outer lid: Aluminium AA601 heated treated and aged T6.

Working Temperature Range
-40oC to +200oC.

Yield
18Mpa    S.G. 0.94

Elongation
450%.

Flex Modules
690Mpa.

Weld neck
100mm or 150mm ANSI 150 with fully sealed blind drilled and tapped stud holes, machine finish outside diameter and fastening point for bonding strap. The bonding strap runs from the pipe to the pit rim and is stainless steel.

Integral Bellows
The integral moulded bellows provides seamless flexibility to accommodate the riser pipe. The 24" pit retains 45 litres before the liquid level reaches the top of the bellows. The bellows has an extended top, allowing variable installation height and surplus can be trimmed back. Entry point is designed for 100mm ANSI 150 bolt pattern weld neck with thick flange for improved sealing.

Lightweight Lid
The HLA100 is the lightest pit lid on the market today which can still withstand the high forces and weights exerted by aircraft as set out in some specifications. It has an automatic self latching feature with single latch mechanism and an anti-slip top. It fits both the 18" and 24" pit.

An outer lid on the 24" lid can also easily be removed when a larger access area is required for maintenance purposes.

Weight Comparisons
Conventional Steel Pit with lid, 18" = ~115kgs.
Conventional Steel Pit with lid, 24" = ~158kgs.
Conventional Al Lid = ~25kgs.
Total weight of Liquip HPA200 = ~75.5kgs.
Total weight of Liquip HPA250 = ~85kgs.
Total weight of Liquip HPA100 = ~32kgs.
Total weight of Liquip HPA150 = ~32kgs.

HPA100: 570mm diameter lightweight Hydrant pit assembly with intergral bellows to accept a special 100 NB flange & 100NB pit valves. The assembly comes complete with both inner and outer covers.

HPA150: 570mm diameter lightweight Hydrant pit assembly with integral bellows to  accept a special 150 NB flange & 100NB pit valves. The assembly comes complete with both inner and outer covers.

HPA200: 700mm diameter lightweight Hydrant pit assembly with integral bellows to  accept a special 100 NB flange & 100NB pit valves. The assembly comes complete with both inner and outer covers.

HPA250: 700mm diameter lightweight Hydrant pit assembly with integral bellows to  accept a special 150 NB flange & 100NB pit valves. The assembly comes complete with both inner and outer covers.

 

HYDRANT PIT SPARES

HLA100 18” Lightweight aluminium hydrant pit cover

HLC200-12 Base flange to suit HPA100 & HPA200

HLC250-12 Base flange to suit HPA150 & HPA250

HLC200-11 Bonding kit for Polyflex Pits