Draw-Flex™ Dual Containment System - Colex International Limited - (Version JPG) - PDF Catalogue | Technical Documentation

Colex International Limited

Draw-Flex™ Dual Containment System

Draw-Flex™ is a cost effective system, offering the water treatment and handling industry the benefits of a ready made Dual Containment Hose at a significantly lower cost.

The current market offers the customer two common options:

1. A ready-made Dual Containment Hose available in the long runs that is attractive to both the contractors

and end users, but which is not only prohibitively expensive, but in many cases has a carrier (inner) hose over-specified for the application.

2. Shorter lengths of more standard products, which although much less expensive, leaves the contractors

having the job of threading the carrier (inner) hose and the additional cost of using multiple catch-pots due to length and safety issues.

Draw-Flex™ offers the advantages of both options with none of the negative aspects.

The Containment Tube (outer), as with the current ready made product, is made from an FDA approved PVC material. However, our Containment tube comes with a pre-threaded stainless steel wire to enable the carrier tube to be simply pulled through.

This system is easily assembled using equipment readily available on the vast majority of sites and installations and is capable of being tailored to meet the specific demands of the job in hand.

In addition to the above points, with Draw-Flex™, if the Containment Tube is damaged or compromised in any way, it can be replaced without the need to replace the carrier Hose, thus offering potential saving on costs further down the line.

This Containment Tube is currently available in three sizes, which are capable of accommodating the most popular sizes of carrier (inner) Hoses and are available in lengths of up to 450m as standard.

The carrier (inner) is available in a range of materials to ensure that chemical compatibility requirements are met but at the most economical prices. The Carrier Hose range consists of:¹

• PTFE - a Fluoropolymer Tube

• NeuVend - a WRAS approved Phthalate free Hose

• Hydravend - a WRAS approved Hytrel lined PVC Hose

• RP- an FDA approved Reinforced PVC hose.

All available in lengths to match the Containment Hose².

Applications

The Draw-Flex™ Dual Containment System is used where additional protection is required to ensure no contamination to the environment or to the product, Chemical Dosing, Chemical Transfer and Water Treatment.

Containment Hose


Part Number	ID (mm)	OD (mm)	Kgs/m	Tolerances		Wire Diameter (mm)	Bend Radius (mm)	3 Max Length (Mtrs)	Colour
Part Number	ID (mm)	OD (mm)	Kgs/m	LD	OD	Wire Diameter (mm)	Bend Radius (mm)	3 Max Length (Mtrs)	Colour
DF25/31	25	31	0.330	+0.38/-0.38	+0.38/-0.38	1.50	160	450	Clear
DF38/48	38	48	0.844	+0.38/-0.38	+0.38/-0.38	1.50	245	400	Clear
DF50/60	50	60	1.080	+0.60/-0.60	+0.38/-0.38	1.50	387	250	Clear


	PTFE		4 NeuVend		Hydravend		PVC
	20°	60°	20°	60°	20°	60°	20°	60°
Calcium Hydroxide	c7	=7		c7	y*	c7 *	e7	</
Ferric Sulphate	c7	</		c7	c7*	/*	e7	</
Ferric Chloride	c7	«7	c7	c7	c7 ²	«7 ²	«7
Ferric Oxide	c7	c7	✓ *	✓ *	c7		«7	n/d
Aluminium Chloride	c7	c7	c7	c7		«7*	«7*	c7 *
Aluminium Sulphate	</	</	</	</	✓ ²	«7 ²	«7*	«7 *
Sodium Carbonate (Bicarbonate)	c7	«7	c7		c7	c7	c7*	«7 *
Sodium Phosphate	c7	«7	¿7		c7	c7	c7*	«7 *
Sodium Hypochlorite		c7	c7 ³	c7 ³	c7 ¹	c7 ¹	c7 ³	«7 ³
Sodium Hydroxide	c7	c7	c7	«7	«7	«7	</ ⁴	n/d
Chlorine Solution 2%	c7	c7	«7			n/d		X
Chlorine Gas	c7	c7	X	X	X	X	X	X


Key:	«7	Good Resistance		Predicted Data	OK up to 5% solution	S²	Minor effect
	S 3	OK up to 15% Chlorine solution	S⁴	OK up to 50% solution	Not Suitable	n/d	No Data

* For use as a guide only. Pressures: Values stated are based on the short term burst pressure at 20°C. Any increase in temperature above 20°C will result in a decline in burst pressures.

¹ Colex WRAS approved Vendhose is also an option for some applications.

² PTFE is available in 100m with longer lengths made to order.

³ This is the length possible on readily available drums, should longer lengths be absolutely necessary bespoke drums can be discussed.

⁴ Vendhose chemical properties similar to NeuVend

Tel: + 44 (0) 1858 461100

Fax: + 44 (0) 1858 466 121 Ä Email: sales@colexint.co.uk H Web: www.colexint.com

IMPORTANT NOTE: Whilst every effort is made to ensure that the above information is accurate and correct, the conditions under which Colex products are used are beyond our control and therefore recommendations are made without warranty or guarantee. Colex reserve the right to change specifications without prior notice.

Draw-Flex™ Dual Containment System - Colex International Limited - #1

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