Cleaning Protocol For Hoses; Figure 22. - Verderflex Nbrf Food Grade Hose Identification - VERDER VERDERFLEX Dura 80 Operating Manual

8.2.2 Cleaning protocol for hoses

VERDERFLEX hoses should be cleaned using the
X
following protocol –
NBR, NR and CSM Hoses:
1. First flush; 0.5% Nitric Acid (HNO3) solution at up to 50°C,
max 10-15 minutes.
2. Second flush; 5% Caustic soda (NaOH) solution
at up to 50°C, max 10-15 minutes and eventually steamed
open ends for 15 minutes at up to 110 °C.
3. Final flush; flush with clean water to remove all traces of
cleaning solutions.
EPDM Hoses:
1. First flush; 0.5% Nitric Acid (HNO3) solution at up to 50°C,
max 10-15 minutes.
2. Second flush; 5% Caustic soda (NaOH) solution at up to
50°C, max 10-15 minutes and eventually steamed open
ends for 15 minutes at up to 130 °C.
3. Final flush; flush with clean water to remove all traces of
cleaning solutions.
NBRF Hoses:
1. First flush; 0.5% Nitric Acid (HNO3) solution at up to 50°C,
max 10-15 minutes.
2. Second flush; 5% Caustic soda (NaOH) solution at up to
50°C, max 10-15 minutes and eventually steamed open
ends for 15 minutes at up to 110°C.
3. Final flush; flush with clean water to remove all traces of
cleaning solutions .
Under no circumstances should VERDERFLEX NBRF
food grade hoses be cleaned with Sodium Hypochlorite
(NaOCl) based cleaning solutions, nor should the above
concentrations, exposure, durations or temperatures be
exceeded.
Food Grade Approval
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All VERDERFLEX NBRF food grade hoses' inner liners are
certified as compliant to:
• FDA – CFR 21 Parts 170 to 199 – Item 177.2600
• EC regulation No.1935/2004
• EC regulation No.2023/2006
Hose Description
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All VERDERFLEX NBRF food grade hoses consist
of a smooth black inner food grade liner bonded to a
non-food grade outer. The inner liner is taste-free and odour
less.
Original instructions (en)
Hose Installation
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All VERDERFLEX NBRF food grade hoses must
be installed in accordance with the procedures defined
in this manual.
Identification
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VERDERFLEX NBRF food Grade hoses can be identified
by:
Both an external yellow coding / identification tape
and an additional white longitudinal stripe. The hose will
also have the glass/fork symbol as per Regulation (EC)
1935/2004.

Figure 22. - Verderflex NBRF food grade hose identification

Pump Installation
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VERDERFLEX pumps using VERDERFLEX NBRF
food grade hoses must be installed in accordance with
recommendations made by the pump's supplier. In
particular, special care must be given to the suction and
discharge line conditions and that the hose is shimmed
in accordance with VERDERFLEX's recommendations.
Should there be any doubt about any installation details,
these must be discussed with the pumps' supplier.
Particle Release
X
All hoses will release small quantities of rubber into the
product stream, especially immediately after the hose
installation and just prior to hose failure. Whilst the rubber
released will be food grade particles, these may cause
end-user concerns about contamination and so we
recommend suitable particle capturing devices, such as
filters, being fitted into the pump's discharge line.
Version 00
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Dura 80 - Operating manual
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