Keofitt W9 User manual
SOME PEOPLE WOULDN’T GAMBLE WITH THEIR SAMPLETM
User ManUal
W9™ SAMPLING VALVE
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INTRODUCTION:
MANUFACTURER: Keott a/s,
Lumbyvej 11H
5000 Odense C
Denmark
TYPE:
W9 SAMPLING VALVE
PATENTS:
U.S. PAT. 5,246,204 • E.P. 0468957
YEAR OF INTRODUCTION: 1998
YEAR OF REVISED DESIGN: 2003
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CONTENTS
Presentation...................................................................................................................................................................7
Valve function.................................................................................................................................................................7
Everyday use of the valve ..............................................................................................................................................8
Sterilisation .......................................................................................................................................................................... 8
Sampling .............................................................................................................................................................................. 8
Technical Data ...............................................................................................................................................................9
Material ............................................................................................................................................................................. 9
Certicate............................................................................................................................................................................. 9
Pressure - max. ................................................................................................................................................................. 9
Temperature - max. .......................................................................................................................................................... 9
Surface nish Ra ................................................................................................................................................................. 9
Viscosity: .............................................................................................................................................................................. 9
Valve bodies W9.......................................................................................................................................................... 10
Valve Heads for W9..................................................................................................................................................... 12
Parts and accessories for W9.................................................................................................................................... 13
Mounting instructions................................................................................................................................................ 14
Location:.............................................................................................................................................................................14
Before welding: ..................................................................................................................................................................14
Welding instructions: ................................................................................................................................................. 14
Block diagram for welding to pipe and tank ............................................................................................................ 15
Keott valve type P (pipe): ................................................................................................................................................15
Keott valve type T (tank): ................................................................................................................................................15
Keott valve type P (pipe connection vertical) Inline: .....................................................................................................15
Block diagram for installation with Clamp,Varivent® and Thread ......................................................................... 16
Keott valve type Clamp connection:...............................................................................................................................16
Keott valve type Varivent®:.............................................................................................................................................16
Keott valve type Thread:..................................................................................................................................................16
Maintenance ............................................................................................................................................................... 17
Spare parts list .................................................................................................................................................................. 17
Disassembly and assembly of valve body and head....................................................................................................... 17
Instructions on replacing PTFE membrane .............................................................................................................. 18
Upgrade from silicone to PTFE membrane............................................................................................................... 19
Upgrade from silicone to PTFE membrane............................................................................................................... 20
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KEOFITT USER MANUAL PAGE 7
PRESENTATION
The Keott W9™ sampling valve is a valve which can be readily sterilised and which meets both hygienic and process design
requirements. This means that an effective cleaning and sterilisation of the sampling valve can be carried out between random
samples independently of the course of the production process without compromising the same.
The W9 valve is 3-A and EHEDG Type El authorised. 3-A Sanitary Standard is an American standard which is normative for a
component’s ease of cleaning and sterilisation. The standard ensures optimum conditions for food products which may come
into contact with the component in question. The EHEDG Type El certication is a European standard and it includes additional
tests of bacterial increase on components that are in direct contact with the sample after the CIP process.
The valve is used in a wide range of processing industries, such as breweries, dairies, and the pharmaceutical and biotechno-
logical industries.
VALVE FUNCTION
The valve is designed to regularly take representative random samples in the production process. The valve is therefore de-
signed such that effective cleaning, sterilisation and sampling can be carried out regularly without interrupting the production
process.
Sterilisation is carried out by supplying steam through the upper of the valve’s two hose pieces. It is the perfect, hygienic design
and surface nish of the inner part of the valve which enables absolute sterilisation in a closed state. According to an EHEDG-
based test carried out by the Biotechnological Institute in Denmark, the valve is sterilised after just 1 minute’s supply of steam
at a pressure of 2 bar(g) (121°C).
Following sterilisation, but prior to sampling, a sterile plug of rubber or stainless steel is tted to the top hose piece. When the
valve is opened the liquid will run out of the lower hose piece.
Note! The membrane functions both as a dynamic packing in the valve seat and as a hygienic, static packing against the valve
body.
WARNING!
• During sterilisation with steam the valve will become hot, and care should thus be taken when handling the valve.
• The valve is designed for use in working conditions of up to 6 bar(g) pressure and temperatures of up to 121°C. It
is therefore important to be aware that the rubber plug (designed for max. 3 bar(g)) or the steel plug (designed for
max. 10 bar(g)) can be forced out at high speed if not seated correctly.
• Always remember to use safety goggles when taking samples because of the risk to the eyes.
IMPORTANT!
• The valve cannot be used for vacuum since the membrane will be sucked hard into the seat.
• The membranes are available in three different qualities: silicone, EPDM and PTFE.
• The silicone membrane has the advantage that it in general can stand higher temperatures, but it cannot tolerate
moisture condensation resulting from steam sterilisation.
• The EPDM membrane is better able to cope with condensation in the steam, and at the same time can be used
with a majority of CIP uids.
• The PTFE membrane resists most CIP uids and very high steam temperatures.
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KEOFITT USER MANUAL PAGE 8
EVERYDAY USE OF THE VALVE
Sterilisation
Sterilisation takes place with valve closed.
1. Remove the plugs.
2. Connect the steam hose to the valve’s upper hose piece.
3. Open the steam supply and let it ow through the valve for sterilisation. 1 min. at 121°C (2 bar(g)).
4. Close the steam supply.
WARNING!
• During sterilisation with steam the valve will become hot, and care should thus be taken when handling the valve.
• The valve is designed for use in working conditions of up to 6 bar(g) and temperatures of up to 121°C. It is
therefore important to be aware that the rubber plug (designed for max. 3 bar(g)) or the steel plug (designed for
max. 10 bar(g)) can be forced out at high speed if not seated correctly. Therefore always remember to use safety
goggles when taking samples because of the risk to the eyes.
• For valve heads allowed for Group IIGD, Category 2 (zone 1) both handle and top of valve heads N and Q must be
cleaned before use.
• Use saturated steam without condensation at max. 2 bar(g). At higher pressures the membrane can be
damaged/split. In most cases the coaxial design ensures absolute cleanliness without the use of CIP or similar. If
CIP is used, please refer to enclosed data sheet. If in doubt, contact Keott.
IMPORTANT!
• To reach 121ºC a pressure of 2 bar(g) is needed. This can only be reached by use of a pressure release valve, or
other counter pressure device mounted on the outlet connection.
• Let steam hose be in place to prevent air contamination during sampling. If removal of steam hose is required, t
a sterile rubber or stainless steel plug onto the upper hose piece.
Sampling
1. Open the valve and take the sample.
2. Shut the valve after the sample has been taken.
3. Clean the valve with steam and/or hot water, cf. ’sterilisation’, points 1-4.
Sterilisation Sampling
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KEOFITT USER MANUAL PAGE 9
TECHNICAL DATA
Material
Valve body: AISI 316L (1.4404)
Valve head: AISI 316L (1.4404)
Membrane: Silicone (grey)
EPDM (black)
PTFE (white)
Certicate
Valve body: 3.1 ®
Membrane silicone acc. to FDA & BGA
Membrane EPDM acc. to FDA & BGA
Membrane PTFE acc. to FDA & BGA
* A 6-digit code is marked on the valve body. This code refers to a 3.1 certicate which accompanies every
consignment of valve bodies.
Pressure - max.
Working pressure: 6 bar(g) / 87 psi(g)
Rubber plug 3 bar(g) / 44 psi(g)
Steel plug 10 bar(g) / 145 psi(g)
Temperature - max.
Sterilisation temp.: 121°C / 249,80°F **
** It is important that the steam is saturated, but dry, as condensation can damage the membrane. (Dry steam
at max. 2 bar(g)).
Surface nish
Internal: Ra <0,5 µm/20 µinch
External: Electropolished
Every valve is Ra measured.
A serial number identies each valve body. A surface nish certicate copy is available on www.keot.dk
Viscosity:
Viscosity range: 0-1000cP, with particles up to 3mm in diameter.
Kv: Valve capacity [m3/h]
Cv: Valve capacity [USgal/min]
Q: • Flow through valve seat [m3/h]
p: • Viscosity of uid [kg/m3]
p: • Presure drop across valve [bar]
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KEOFITT USER MANUAL PAGE 10
VALVE BODIES W9
Hose piece Mini tri-clamp M16x1,5
Tank welding (type T) - process connection
850001 850006 850015
Key measurements
(Please refer to bottom page 11!)
B C D E B C D E B C D E
9 mm
8 mm
28 mm
68,22 mm
9 mm
8 mm
28 mm
122,1 mm
9 mm
8 mm
28 mm
69,1 mm
Pipe welding (type P) - process connection
850011 850010 850016
Key measurements
(Please refer to bottom page 11!)
B C D E B C D E B C D E
9 mm
8 mm
25 mm
68 mm
9 mm
8 mm
25 mm
122 mm
9 mm
8 mm
25 mm
69 mm
Pipe welding (type P) - NW25 - process connection
850014
Key measurements
(Please refer to bottom page 11!)
B C D E
9 mm
8 mm
28 mm
68 mm
Clamp - connection 1” - process connection
850021 850022 850024
Key measurements
(Please refer to bottom page 11!)
B C D E B C D E B C D E
9 mm
8 mm
50,4 mm
68 mm
9 mm
8 mm
50,4 mm
122 mm
9 mm
8 mm
50,4 mm
69 mm
Clamp - connection 2” - process connection
850003 850005
Key measurements
(Please refer to bottom page 11!)
B C D E B C D E
9 mm
8 mm
64 mm
68 mm
9 mm
8 mm
64 mm
122 mm
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