KROHNE OPTIMASS Series User manual

©KROHNE 06/05 7.02233.24.00
Installation and operating
handbook
Optimass Series of Mass Flowmeters and
050/051 Converters
Subject to change without notice
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Installation and Operating Instructions OPTIMASS 2
Contents
1 MECHANICAL INSTALLATION 6
1.1 General principles 6
1.1.1 Transport and Lifting 8
1.2 OPTIMASS 7000 Single Straight Tube Meter 9
1.2.1 Specific Installation Guidelines 9
1.2.2 Ambient / Process temperatures 9
1.2.3 Pressure Equipment Directive (PED) requirements 9
1.2.4 Secondary Pressure containment 10
1.2.5 Pressure de-rating 10
1.2.6 Hygienic Applications 13
1.2.7 Heating and insulation 14
1.2.8 Purge Port Meters and Burst Disk Meters 18
1.2.9 Technical Data 19
1.2.10 Weights & Dimensions 20
1.3 OPTIMASS 3000 (7100) Single Z Shaped Tube Meter 23
1.3.1 Specific Installation Guidelines 23
1.3.2 Ambient / Process temperatures 24
1.3.3 Pressure Equipment Directive (PED) requirements 24
1.3.4 Secondary Pressure containment 25
1.3.5 Pressure de-rating 25
1.3.6 Heating and insulation 26
1.3.7 Purge Port Meters and Burst Disk Meters 26
1.3.8 Technical Data 27
1.3.9 Weights & Dimensions 28
1.4 OPTIMASS 8000 / 9000 Meter with Twin U Measuring Tubes 30
1.4.1 Specific Installation Guidelines 30
1.4.2 Ambient / Process temperatures 30
1.4.3 Pressure Equipment Directive (PED) requirements 30
1.4.4 Secondary Pressure containment 31
1.4.5 Pressure de-rating 31
1.4.6 Hygienic Applications 33
1.4.7 Heating and insulation 34
1.4.8 Purge Port Meters and Burst Disk Meters 35
1.4.9 Technical Data 35
1.4.10 Weights & Dimensions 35
2 ELECTRICAL INSTALLATION 39
2.1 Location and connecting cables 39
2.2 Connection to power 39
2.2.1 Power Supply Wiring MFC050 39
2.2.2 Power Supply Wiring MFC051 Non Ex 39
2.2.3 Power Supply Wiring MFC 051 Ex 40
2.3 Connection of remote meters 40
2.4 Hazardous Area requirements 41
2.5 Inputs and outputs 41
2.5.1 Inputs/Outputs MFC 050 41
2.5.2 Inputs / Outputs MFC051 46
2.6 Compact to Remote / Remote to Compact conversion instructions 48
2.7 Technical Data 48
2.7.1 MFC050 48
2.7.2 MFC051 49
3 START-UP 50
3.1 Factory Set Parameters 50
3.2 Initial Start-up 50
3.3 Zero point adjustment 51
3.4 Programming the converter with a bar magnet 51

Installation and Operating Instructions OPTIMASS 3
4 PROGRAMMING THE CONVERTER MFC 050/051 52
4.1 Operating and check elements 52
4.2 OPTIMASS MFC 050/051 Operating Concept 53
4.3 Key functions 54
4.3.1 How to enter programming mode 55
4.3.2 How to terminate Programming mode 55
4.4 Table of programmable functions 58
4.5 Reset / Quit Menu - Totalizer reset and status indication acknowledgement 67
5 DESCRIPTION OF FUNCTIONS 68
5.1 Menu 1 - Initial Start up 68
5.2 Menu 2 – Functional Checks 74
5.3 Menu 3- Configuration Menu 78
5.4 Menu 4 - I/O Configuration 86
5.5 Menu 5 - Factory Settings 91
6 SERVICE AND TROUBLE SHOOTING 93
6.1 Diagnostic functions 93
6.2 Error Messages 94
6.3 Functional Tests and Troubleshooting 95
6.4 Replacing the Front End or Back End Electronics 97
6.4.1 Replacing the Front End 97
6.4.2 Replacing the Back End 98
6.5 Spares 99
7 EXTERNAL STANDARDS AND CODES 101
7.1 Standards 101
7.1.1 Mechanical 101
7.1.2 Electrical 101
7.2 Declaration of Conformity 102
7.3 PED Certificate 103
8 DEVICE CONFIGURATION SHEET 105
9 DECLARATION OF CLEANLINESS CERTIFICATE 107

Installation and Operating Instructions OPTIMASS 4
How to use these installation and operating instructions
Congratulations on purchasing this high quality product. To get the best out of your mass flowmeter,
please take some time to read through the instructions.
This instruction handbook is comprehensive and describes the many features and options available
with this mass flow meter.
Please refer to the index for a list of detailed topics.
Note:
If applicable, a separate document is supplied that describes all ATEX hazardous area information.
Product liability and warranty
The OPTIMASS mass flow meter family is designed for the direct measurement of mass flow rate,
product density and product temperature, and also indirectly enables measurement of parameters such
as total mass, concentration of dissolved substances and the volume flow.
For use in hazardous areas, special codes and regulations are applicable which are specified in the
section on Hazardous Area Installations.
Responsibility as to suitability and intended use of our instruments rests solely with the
purchaser. The supplier does not accept any liability resulting from misuse by the customer.
Improper installation and operation of the flow meters may lead to loss of warranty. Warranty is also
null and void if the instrument is damaged or interfered with in any way.
In addition, the “general conditions of sale” which forms the basis of the purchase agreement are
applicable.
If you need to return OPTIMASS flow meters to KROHNE, please complete the form on the last page
of the installation and Operating manual and return it with the meter to be repaired. KROHNE regrets
that it cannot repair or check your flow meter unless accompanied by this completed form.
CE / EMC Standards /Approvals
• The OPTIMASS family with the MFC 050 / 051 / 010 signal converter meets all the requirements of
the EU-EMC and PED Directives and bears the CE Symbol.
• The OPTIMASS system is approved for hazardous duty installations to the harmonised European
Standards (ATEX) to Factory Mutual (FM) and CSA (Canadian Standards).
Technical data subject to change without notice

Installation and Operating Instructions OPTIMASS 5
Unpacking the meter
When unpacking your meter, please ensure that no visible damage has occurred during
transportation. If damage has occurred, please contact the carrier for claims.
Your high quality instrument has been fully tested and checked before shipping. The following
items should be included with your instrument unless otherwise requested:
1. Mass Flow Meter OPTIMASS
2. Separate Converter with remote converter wall mount (not for compact version)
3. CD-ROM & Quick Start Guides
4. Spanner to open the electronic housing lids
5. Bar magnet for programming the meter
6. Screw driver for terminal connections
7. Calibration certificate
8. Factory and Material certification, if ordered.
If any of these items are missing, please contact your nearest KROHNE Office or representative
(see back page).
Attention:
Please read the Handbook before installing the meter.
Many problems are avoided when the simple guidelines in this handbook are followed.

Installation and Operating Instructions OPTIMASS 6
1 Mechanical Installation
1.1 General principles
The OPTIMASS mass flow meters provide high accuracy and excellent repeatability. Narrow band pass
digital filtering, and the mathematically modelled internal primary head design with AST (Adaptive Sensor
Technology) for the OPTIMASS sensor family provide exceptional immunity to external vibratory
disturbances from nearby process equipment.
The accuracy of the flow meter is not affected by velocity profile.
The following installation guidelines are practical to implement, particularly if planned before the
OPTIMASS meter is first installed. For further dimensions or connections, please refer to the relevant
section.
For the OPTIMASS, in general, no special mounting requirements are necessary. However, good general
engineering practice for the installation of flow meters should still be observed.
The general guidelines described in this section are valid for the complete OPTIMASS family of mass flow
meters.
• The mass flow meters do not require any straight inlet or outlet runs.
• Due to the weight of the meters we recommend the use of supports.
• It is permissible to support the body of the meter.
• The meter can be installed horizontally, in an upward sloping pipeline or vertically. For best results, a
vertical installation with flow in an upward direction is recommended.
This label on the meter shows the flow direction programmed into the converter in function 3.1.4.
As default this is always in the direction of the ‘+’ arrow, i.e. left-to right as the label is viewed.

Installation and Operating Instructions OPTIMASS 7
Examples
Vertical mounting Horizontal mounting
Upward sloping installation
Avoid mounting the meter with long vertical
drops after the meter. This could cause
siphoning and cause measurement errors.
Avoid mounting the meter at the highest point in
the pipeline. Air or gas can accumulate here and
cause faulty measurements
1
2
Flow
2
1
Flow
1 Valve for zeroing flow meter
2 The second valve is recommended if the pump is switched off to prevent reverse flow
To enable a good zero to be done, it is recommended that a shut-off valve be installed downstream
of the flow meter.

Installation and Operating Instructions OPTIMASS 8
1.1.1Transport and Lifting
As the larger meters are heavy, care should be taken when lifting to install.
• Meters should be lifted or suspended using a well maintained sling.
• The meters should under no circumstances be lifted by the electronics housings.
• The meters can be lifted and suspended from the spigots as shown.

Installation and Operating Instructions OPTIMASS 9
1.2 OPTIMASS 7000 Single Straight Tube Meter
1.2.1 Specific Installation Guidelines
• Tighten flange bolts evenly.
• Observe min and max pipe end loads at end of this section.
The use of reducers at the flanges is
allowed. Extreme pipe size reductions
should be avoided due to possibility of
cavitation and degassing.
There are no additional installation requirements for the OPTIMASS 7000 sensors. Fixing of flexible
hoses directly on the meter is allowed.
1.2.2 Ambient / Process temperatures
The specified and approved ambient and process temperatures must be observed.
Titanium HC22 SS318L
°C °F °C °F °C °F
Process -40 .. +150 -40 .. +300 0 .. +100 0 .. 212 0 .. +100 0 .. 212
-20°C or 4°F for hygienic
or aseptic connections
Compact
-40 .. +55 -40 .. +130 -40 .. +55 -40 .. +130 -40 .. +55
-40 ..
+130
Ambient Remote
-40 .. +60 -40 .. +140 -40 .. +60 -40 .. +140 -40 .. +60
-40 ..
+140
Note:
Where meters are mounted in direct sunlight, it is recommended to install a sunshade. This is
particularly important in countries with high ambient temperatures.
The maximum differential temperature between the process and ambient temperature without
insulation is 130°C or 265°F for Titanium and 80°C or 115°F for Hastelloy and Stainless Steel meters.
1.2.3 Pressure Equipment Directive (PED) requirements.
To comply with the requirements of the PED in Europe, the following information is provided to assist
the plant engineer in installing the meter.
Measuring tube: Titanium Grade 9 Sealing Faces: Titanium Grade 2
Hastelloy C22 Hastelloy C22
Stainless SS 318 Stainless SS 318
The outer cylinder (Secondary Pressure containment) 304 / 304L is dual certified and with “0” rings in
pairs of Viton and hydrogenated nitrile. (Optional outer cylinder of 316/316L).
Wiring feedthrough is made of Epoxy.
Flanges all 316 / 316 L dual certified.
Optional heating jacket 316 / 316L.
Note :
Outer cylinder is in contact with heating medium.

Installation and Operating Instructions OPTIMASS 10
1.2.4 Secondary Pressure containment
The OPTIMASS 7000 meters are supplied with secondary pressure containment as standard.
Allowable maximum secondary containment pressures are 63 bar at 20°C or 914 psig at 70°F
If the user suspects that the primary tube has failed, the unit must be depressurised and removed
from service as soon as possible.
Note:
In the 7000 Series there are high pressure feed through seals and ‘O’ rings that might not be
compatible with the process fluid for an extended period if a primary tube fails.
It is important to remove the meter ASAP
It is the user’s responsibility to ensure that the materials used are compatible with this product.
Other ‘O’ ring materials are available on request.
1.2.5 Pressure de-rating
Meter data plates are stamped with maximum pressure rating (at max. operating temperature) of
connection, primary tube or secondary pressure containment (whichever is the lower). Higher
pressures may be possible at lower temperatures.
Titanium Tubes and secondary pressure containment is 63 bar at 20°C or 910 psi at
4°F
De-rated to 40 bar at 150°C or 580 psi at
300°F
The titanium tubes could handle a higher pressure, but where this exceeds the pressure rating, a relief
or bursting disk has to be fitted to the secondary pressure containment. This can be done as a
special. (This is available for meter sizes up to 25 only)
Hastelloy and SS measuring tubes are rated for 50 bar at 20°C or 725 psi at
4°F
De-rated to 40 bar at 100°C or 580 psi at
210°F
Heating Jacket 10 bar at 100°C or 145 psi at
210°F
Pressure Derating
Pressure/Temperature de-rating for Titanium Gr.9
Metric PN 40 & PN63
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
-50 0 50 100 150
Temperature/deg. C
Pressure in Bar
Secondary Press. Containment 316 L
&
DIN 2501
PN 63 Flange
Secondary Press. Containment 304 L
DIN 2501
PN 40 Flange
DN100 PN40 Flange
DN80 PN63, DN100 PN63
Flange

Installation and Operating Instructions OPTIMASS 11
Pressure/Temperature de-rating for SS and Hast. C22
Metric DIN 2501 PN 40
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
0 102030405060708090100
Temperature Deg. C
Pressure (bar)
Secondary Pressure
Containment 316 L
Secondary Pressure
Containment 304 L
and flanges
DIN 2501 PN 40
DN100 PN40 Flange
Pressure/Temperature de-rating for Titanium Gr.9
ANSI 150/300/600 lbs
0
100
200
300
400
500
600
700
800
900
1000
-50 0 50 100 150 200 250 300 350
Temperature/deg. F
Pressure in psi
Secondary Pressure
containment 316 L
& ANSI 600 lbs
ANSI 300 lbs
ANSI 150 lbs
Secondary Pressure
containment 304 L

Installation and Operating Instructions OPTIMASS 12
Pressure/Temperature de-rating for SS and Hast. C22
ANSI 150 and 300 lbs
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
30 50 70 90 110 130 150 170 190 210
Temperature in Deg. F
Pressure in psi
Secondary Pressure
Containment 316 L
ANSI 300 lbs
ANSI 150 lbs
Secondary Pressure
Containment 304 L
Maximum pipe work forces
The maximum forces exerted on the meter from the pipe work, compressive or tensile has been
calculated for the 7000 Series (Straight tube meter) with Titanium, Hastelloy and SS measuring tubes
as follows:
Titanium
Size Max Force:
Flanges Max Force: Hygienic Connectors
06 T 19 KN 1.5 KN
10 T 25 KN 2 KN
15 T* 38 KN 5 KN
25 T 60 KN 9 KN
40 T 80 KN 12 KN
50 T 170 KN 12 KN
80 T 230 KN 30 KN
*On OPTIMASS 15 T with ½” ANSI flanges only – maximum end load is 19 KN.
Hastelloy and SS
Size Max Force:
Flanges Max Force: Hygienic Connectors
06 S 19 KN 1.5 KN
10 H/S 25 KN 2 KN
15 H/S* 38 KN 5 KN
25 H/S 60 KN 9 KN
40 H/S 80 KN 12 KN
50 H/S 80 KN 12 KN
80 H/S 170 KN 18 KN
*On Optimass 15 H or S with ½” ANSI flanges only – maximum end load is 19 KN
Loads given in both tables are maximum static loads. If loads are cycling, particularly between tension
and compression then these loads should be reduced.
Please consult KROHNE for more information.

Installation and Operating Instructions OPTIMASS 13
1.2.6 Hygienic Applications
The OPTIMASS 7000 series is available with a variety of hygienic process connectors.
When using / installing meters with hygienic process connectors, care should be taken to ensure the
meter is well supported / clamped, as the meters are heavy and could injure when disconnected from
the adjacent pipe work.
The recommended method of installation is to mount the meter against a support / wall with the body of
the meter supported / clamped. The process pipe work can then be supported off the meter. The meter
is too heavy to be supported from the thin walled piping usually associated with the hygienic industry.
Meter supported from its body
Installation lengths
For installation lengths, please see section 1.2.10
Please check with KROHNE if you are unsure of the installation length. Many meters are built to
customer requirements / specifications especially where special hygienic process connectors have been
adapted to the meter. As these are normally non-standard, the installation length will not be given in the
technical data.
It is also recommended that the seals be replaced regularly to maintain the hygienic integrity of the
connection.
Hygienic Connection Materials
Version Titanium Meter SS 318 Meter
All welded DIN 11864
All welded Tri-Clamps
Titanium Grade 2 SS 318
Adaptor versions 316L Stainless Steel 316L Stainless Steel
EPDM seals EPDM seals
Unless specifically requested, internal surfaces are not polished and no warranty is made as to the
surface finish. If polishing option and /or EHEDG, ASME Bio-Processing or 3A approvals was selected
at time of order, all product contact surfaces are polished 0.5 micrometer Ra (Ra 20) finish or better.
Use of OPTIMASS 7000 SS sensors above 100°C – Hygienic Connections only
Sizes 25S, 40S, 50S and 80S sensors with hygienic connections may be exposed to temperatures
above 100°C up to a maximum of 130°C for a maximum of 2 hours (e.g. for steam cleaning purposes).
The maximum temperature shock permitted either from cold to hot or from hot to cold is 110°C.
E.g. A meter measuring a product at 20°C can be immediately steam cleaned at 130°C, but a meter
measuring a product at 5°C can only be immediately steam cleaned at 115°C. Conversely, after steam
cleaning at 130°C the minimum allowed temperature of the product introduced immediately afterwards is
20°C.
Operation outside of these guidelines may cause shifts in the mass flow and density calibration.
Repeated shocking may also cause premature failure of the meter.

Installation and Operating Instructions OPTIMASS 14
1.2.7 Heating and insulation
There are several methods to heat the meter. In most cases heating is unnecessary as the meter is
designed as such that very little heat is lost or gained through the outer cylinder.
Insulation
Where insulation is required a variety of materials may be used to insulate the meter. Care must be
taken not to insulate the meter above the halfway mark of the electronics support post as shown in the
sketch.
Do not insulate above
this line.
Insulation
Electrical Heating
Electrical tape heating may be used. Care should be taken to only heat the sections where the best
effect will be achieved. Do not heat above the converter mount centre line as shown above.
The following guidelines must be observed.
Areas A and B may be
heated. Area C must not be
heated.
When insulating please observe guidelines as per insulation section.
DIM A and BSize
Titanium Hastelloy + SS 318
10 50 -
15 65 65
25 120 75
40 150 150
50 200 125
80 410 225

Installation and Operating Instructions OPTIMASS 15
Liquid / Steam heating jacket
The meter can be supplied with a heating jacket. This jacket is designed to minimise the differential
stress across the meter where differences in temperature between outer cylinder and measuring tube
exist.
The connections to the heating jacket are NPT or Ermeto sockets.
It is recommended that reinforced flexible hoses be used to connect the heating jacket to the heat
source.
Important:
Always heat jacket to working temperature before flowing product in measuring tube.
It is important to avoid the use in the heating jackets of fluids which cause crevice corrosion.
Regarding jacket materials. Although all the jacket materials are 316L, the outer cylinders are 304L
(Optional 316L).
Connections should be made to ensure all air can be vented on liquid systems and all condensate can
be drained on steam systems.
Note :
Max heating medium pressure and temperature for heating jackets is 10 bar at 150°C or 145 psig at
300°F for titanium measuring tubes and 10 bar at 100°C or 145 psig at 210 °F for Hastelloy and
Stainless Steel measuring tubes.
Heating Times
The following graphs are provided as a guide only. Heating times were calculated and tested using the
following conditions:
• Ambient temperature 25°C or 80°F
• Meter insulated.
The Titanium meters were heated using a steam temperature of 150°C or 300°F and the Hastelloy and
Stainless Steel meters using a temperature of 100°C or 210°F.
Heating times may vary depending on the quality of insulation (if any), ambient temperature and
temperature of the heating medium. Once meter has been heated to a temperature where the product
will not solidify, product may be introduced if required. This will bring the meter to operating temperature
sooner.
Note:
The maximum heating temperature for a Titanium meter is 150°C or 300°F.
The maximum heating temperature for Hastelloy or SS meters is 100°C or 210°F.
If these temperatures are exceeded, the meter will be damaged.
KROHNE accepts no responsibility if this happens.

Installation and Operating Instructions OPTIMASS 16
OPTIMASS T10 to T25 - Heating Times
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00
Time (hours)
32
52
72
92
112
132
152
172
192
212
232
252
272
292
312
Measuring Tube (centre) temperature (°C)
Measuring Tube (centre) temperature (°F)
OPTIMASS T 40 to T 80 - Heating Times
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 24.00
Time (hours)
30
50
70
90
110
130
150
170
190
210
230
250
270
290
310
Measuring Tube (centre) temperature (°C)
Measuring Tube (centre) temperature (°F)
OPTIMASS H & S15 to 25 Heating Times
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00
Time (hours)
32
52
72
92
112
132
152
172
192
212
Measuring Tube (centre) temperature (°C)
Measuring Tube (centre) temperature (°F)

Installation and Operating Instructions OPTIMASS 17
OPTIMASS H & S 40 Heating Time
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00
Time (hours)
32
52
72
92
112
132
152
172
192
212
Measuring Tube (centre) temperature (°C)
Measuring Tube (centre) temperature (°F)
OPTIMASS H & S 50 to 80 Heating Times
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 24.00 26.00
Time
(
hours
)
Measuring Tube (centre) temperature (°C)
30
50
70
90
110
130
150
170
190
210
Measuring Tube (centre) temperature (°F)
Cooling
Please consult KROHNE if cooling medium is to be used in the heating jacket.

Installation and Operating Instructions OPTIMASS 18
1.2.8 Purge Port Meters and Burst Disk Meters
Purge Port Options
If the purge port option was selected at time of order, then your meter will be fitted with ½” NPT female
connections – these will be clearly identified. These connections are sealed with NPT plugs and PTFE
tape.
Important:
Do not remove these plugs.
The meter is factory sealed with a dry nitrogen gas fill and any ingress of moisture will damage the meter.
The plugs should only be removed to purge the inside of the meter case of any product if it is suspected
that the primary measuring tube has failed. This must only be done after the meter has been
depressurised and removed from service. This should be done as soon as possible after failure is
suspected (less than 3 days)
Burst Disk meters (Meters up to size 25 only)
OPTIMASS 7000 meters that have been ordered with a bursting (rupture) disk will be so fitted. This is
fitted when the operating pressure of the measuring tube exceeds the design pressure of the secondary
containment. The disk failure pressure is 20bar @ 20°C.
Important:
The burst disk is suitable for the designed application according to the process conditions and flow rates
as per original order. If conditions alter, consult KROHNE for further advice regarding suitability of disk
fitted.
If the product is in any way hazardous, it is strongly recommended that an exhaust tube is connected to
the NPT male thread of the burst disk so that the discharge can be piped to a safe area. This tube should
be large enough that pressure cannot build up in the meter case.
Ensure arrow on burst disk is pointing away from meter.

Installation and Operating Instructions OPTIMASS 19
1.2.9 Technical Data
Nominal Flow Rates
06 10 15 25 40 50 80
Kg/h 950 2,700 11,250 34,500 91,500 180,000 430,000
Lbs/min 35 100 400 1,250 3,350 6,600 15,800
Maximum flow rate
Typically 130 % of the nominal flow rate for the sensor size depending on application.
Minimum flow rate
Depending on measuring error required.
Tube materials:
• Titanium Gr. 9,
• Hastelloy C22 and
• SS 318.
The meter size has a prefix T, H, or S indicating the tube material.
Secondary pressure containment
• All 70 Series meters have secondary containment rated to 40 bar or 580 psi.
• An optional 63 bar or 914 psi is available.
Materials of construction
• Flanges: SS 316 L
• Spigots and outer cylinder: SS 304 L optional SS 316 L
• Front end housing and post: SS 316 L
• Converter housing: Epoxy coated aluminium