8 tube materials in atex applications – Watson-Marlow 700 series User Manual

Page 7

ATEX Directive: Watson-Marlow 700 series pumpheads User Manual

8 Tube materials in
ATEX applications

The following Watson-Marlow tube materials are suitable for use in ATEX applica-
tions:
l Pumpsil (platinum-cured silicone)
l Marprene
l Bioprene
l STA-PURE PCS
l STA-PURE PFL
l Neoprene
l PVC

Please note from the table below that there are limitations of length that can be used
for certain tube materials. Pumpsil cannot be used in any ATEX application above
the specified lengths listed. When using Bioprene and Marprene there is a reduction
in class suitability when they are in contact with Polyamides.

Permissible length of tubing (cm) for IIB rating:

Series

Bore

(mm)

Wall

(mm)

Pumpsil

(cm)

Sta-Pure*

(cm)

Chem-Sure*

(cm)

Marprene** Bioprene** Pureweld Neoprene

701RA

25.4 4.8 35.0

29***

unlimited

701RA

19.0 4.8 28.6

unlimited

701RA

15.9 4.8 25.5

unlimited

701RA

12.7 4.8 22.3

unlimited

701RA

9.6

4.8 19.2

unlimited

* If length limit exceeded for STA-PURE PCS and STA-PURE PFL, ATEX rating
reduced to IIA
** Marprene and Bioprene rated IIA when in contact with Polyamides
*** 25.4mm tube not suitable for use in REA pumpheads

This manual is related to the following products:

501RL