Union Pury 250e User manual

Users Manual
Pury 250e
Gas Purification System

Safety Instructions Manual Pury 250e
2 Manual Pury 250e 2006-06-08
Union Apparatebaugesellschaft GmbH
P.O. Box 21 10 51
D – 76185 Karlsruhe
Zeppelinstrasse 42
D 76185 Karlsruhe
Germany
Phone +49 721 – 95243 – 0
Fax +49 721 – 95243 – 33
e-mail [email protected]
www.union-apparatebau.de
Represented in China by:
Anshan Union System Control Co., Ltd.
192#A Yualin Road, Tiedong District, Anshan,China
Tel: [phone]
0086 412 6356000
Fax: [phone]
e-mail: [email protected]
Represented in North America by:
Delta Instrument LLC
148 Veterans Drive
Northvale
NJ 07647
Phone: [phone]
Fax: [phone]
Web: DeltaInstrument.com
Email: [email protected]

Manual Pury 250e Safety Instructions
Manual Pury 250e 2006-06-08 3
Welcome
Thank you for specifying a Pury 250e for your online process measurement
application.
Please read this manual and follow all directions before installation and use of this
gas purification system.
Unpacking and initial inspection of this unit requires only normal precautions and
procedures applicable to the handling of analytical equipment. All shipping containers
should be carefully checked for any included accessories. Check the shipment
against the packing slip and any system arrangement drawings to ascertain that the
shipment is complete.
The unit was carefully inspected and calibrated at the factory. Check the shipment for
possible damage incurred during transit. If there is any sign of visible damage to the
crate or hidden damage inside the shipment, notify the carrier and the factory
immediately as the equipment warranty does not cover damage in shipping.
In the event of trouble during start-up, please contact a factory representative and
inform them of the model and serial number of the unit, plus a full description of the
problem. Note: The factory will not be responsible if the customer should attempt
repair of the unit during the warranty period without first following any detailed factory
instruction.
All possible care has been taken in the publication of this user’s manual but Union, its
agents and distributors, accept no liability for any inaccuracies or omissions that may
be found. This manual reflects the state of the product at the issue date below but
further refinements may mean that the manual does not fully reflect your particular
system.
Before start up and use of the Pury 250e please take time to carefully review
this manual and its contents. Observe all safety notes, warnings, cautions and
notes – see Chapter 1 for more details.
Union Apparatebau GmbH reserves the right to make changes to this publication and
the product that it describes without notice.

Safety Instructions Manual Pury 250e
4 Manual Pury 250e 2006-06-08
Contents
1. Safety Instructions ............................................................................... 5
2. Introduction.......................................................................................... 7
2.1. General information ............................................................................. 7
3. Installation ........................................................................................... 9
3.1. Overview.............................................................................................. 9
3.2. Installing the gas lines ....................................................................... 10
3.3. Installing the condensate line............................................................. 11
3.4. Electrical connections ........................................................................ 11
4. Commissioning .................................................................................. 15
4.1. Control menu ..................................................................................... 15
5. Measurement Principle ...................................................................... 17
5.1. Functional description........................................................................ 17
6. Maintenance ...................................................................................... 19
6.1. Capillary cooler with filter................................................................... 19
6.2. Cooling block with fan........................................................................ 20
6.3. Condensate pump ............................................................................. 20
7. Decommissioning .............................................................................. 20
8. Trouble Shooting ............................................................................... 21
8.1. Cooling device does not switch on..................................................... 21
8.2. Cooling block does not cool............................................................... 21
8.3. Condensate carry-over to the gas outlet............................................ 21
9. Circuit Diagrams ................................................................................ 23
9.1. Control board terminals ..................................................................... 24
10. Technical Data................................................................................... 25
10.1. System specifications ........................................................................ 25
10.2. Condensate volume........................................................................... 25
10.3. Water vapour ..................................................................................... 26
11. Spare Parts........................................................................................ 27

Manual Pury 250e Safety Instructions
Manual Pury 250e 2006-06-08 5
1. Safety Instructions
Before start up and use of the Pury 250E, please take time to carefully review
this manual and its contents. Observe all warnings, cautions and notes.
Warning:
Disconnect the main power switch before any service work is carried out.
Before maintenance or repair work on the power or high voltage ignition
equipment, the following points need to be observed.
After switching off the main power wait at least 5 min. for any stored voltage
charge to dissipate to zero.
During start up, service or abnormal conditions there is a danger of a very
small release of unburned gas from the outlet of the system to the atmosphere.
If process gas has any toxic components please follow all personal safety
rules. Any small release of gas during start-up is highly diluted with cooling
air.
All electrical connections to line power must be carried out by a qualified electrician.
The analyzers internal electrical components are wired in accordance with NEC, VDE
and International standards. Check the power supply voltage, details can be found on
the technical data label inside the door.
Only qualified personnel should install the gas connections in accordance with all
local codes and ordinances.
The Pury 250E operates over a specified ambient temperature range. and installing
the unit directly outside is not recommended, since damage may occur from adverse
weather conditions if an outdoor shelter is not used.
Caution:
Caution is necessary during installation because pressurized flammable gases are
connected to the sample conditioner and any installation work performed by the
customer must conform to all applicable local and national codes. All internal sample
gas components have been leak tested at 1.5 times the normal operating pressure
during assembly at the factory. After installation, the entire sample gas system
should be pressurized and tested for leaks before use.
When planning the installation, local site conditions must be taken into account so
consult any hazardous area regulations for applicability.

Introduction Manual Pury 250e
6 Manual Pury 250e 2006-06-08

Manual Pury 250e Introduction
Manual Pury 250e 2006-06-08 7
2. Introduction
2.1. General information
Sample gases found in industrial processes are often saturated with water and
contain dust and other components undesirable to the measurement process. The
Pury 250e gas purification system dries and cleans gas in such a way that it can be
processed for measurement in a CWD2000 gas calorimeter or other on-line process
analyzers.
Undesirable components may include:
Dust
Naphtha
Hydrogen Sulfide
Water
And other additional components such as oils, tars and acids.
The components will differ depending on the family of gases, and the unit is in
primarily designed for use with coke oven and blast furnace gases. Naturally, other
gases can be dried and cleaned. Special applications may require the supply of a
heated sample gas line or additional filtration.
The Pury 250e consists of a stainless steel heat exchanger that cools the process
gas to between 1 and 5 °C. The water removed from the sample gas by
condensation is collected in a container and is drained using a peristaltic condensate
pump. The refluxed water dissolves acid and removes dust in the sample gas by
creating small droplets on the stainless steel filter elements.
The cooling system of the Pury 250e is connected directly to the process gas line. If
the process gas is saturated with water at higher than ambient temperature, then a
heated line should be installed to avoid condensation and possible blockage in the
line.
The optimum conditions for use are within an ambient temperature range of +5 to +
45 °C. Beyond these limits, the system efficiency is reduced and below 0°C there is a
real risk of damage from the condensate freezing.
Maintenance of the Pury 250e is simple and limited to cleaning and or replacement of
the stainless steel filter elements and checking the operation of the condensate
pump. The cooling unit, control elements and the condensate pump are protected by
a compact indoor rated enclosure. The condensate pump operates periodically and
drains the collected condensate.
The maximum sample gas flow is 250 litres per hour with a pressure drop of 5-10
mbar, depending on gas consumption.

Installation Manual Pury 250e
8 Manual Pury 250e 2006-06-08

Manual Pury 250e Installation
Manual Pury 250e 2006-06-08 9
3. Installation
Carefully remove the Pury 250e from its packaging material and check for any loose
items. The installation location must be clean, dry and sufficiently ventilated as the
fan draws in 50 m3of air per hour from the surrounding environment.
3.1. Overview
Figure 1 : Pury 250E system overview
1 Relay output 9 Cooling fan
2 Relay output 10 Filter housing
3 Relay output 11 Gas inlet
4 Line Power 12 Condensate container
5 Holding screw 13 Condensate outlet
6 Fan grille 14 Condensate pump delivery side
7 Gas outlet 15 Condensate pump
8 Fan grille 16 Condensate inlet
The Pury 250e is an indoor wall mounted unit and must be installed in a vertical
position well away from sources of heat. There must be sufficient space around the
enclosure’s ventilation ports to allow cooling air to freely circulate and heated exhaust
air to escape.
If installed outside, the Pury 250 e must be fully protected from the effects of weather
conditions.

Installation Manual Pury 250e
10 Manual Pury 250e 2006-06-08
3.2. Installing the gas lines
If a heated line is installed, insulate the line where it connects to the unit. If a S/S line
is used, thermal decoupling may be required at the sample gas input to avoid any
overheating due to heat conducted from the heated line.
Gyrolok 6x1 (1/4” tube) threaded connections are provided. The dimensions have
been adapted for the required consumption and pressure drop. 6x1 (1/4”) SS tubing
is recommended for the process gas outlet at the top to the capillary cooler. If
necessary, an additional filter can be connected at this point.
The sample gas line is connected to the calorimeter via a pressure regulator or
directly depending on the available supply pressure after the gas cooler. The
additional pressure regulator is required if the process gas pressure is above 15-18
mbar (6 – 8” H2O).
The pressure drop through the unit is about 5 mbar. If the specified pressure at the
gas outlet is too low for the analyzer a sample gas pump must be used. This can be
supplied as an option on request. The pump is designed for a delivery volume of 250
l/h max.
Figure 2 : Typical gas connection diagram

Manual Pury 250e Installation
Manual Pury 250e 2006-06-08 11
3.3. Installing the condensate line
To allow all the condensate to be pumped out of the system the condensate line
must be always be above freezing point.
The Condensate pump is connected with a tube .runs from the condensate collection
container to the pump to an outside location. The condensate can be discharged or
pumped back into the process using locally sourced tubing.
All connections must be checked for leaks.
The mechanical installation of the Pury 250E is now complete.
3.4. Electrical connections
Prior to commissioning, please first check the power supply voltage matches with the
voltage specified on the specification rating plate.
Remove the 4 attachment screws on the enclosure to gain access to the connection
terminals.
The enclosure cover should be removed and the power supply cable passed through
the PG cable glands and connected to the unit as shown in the terminal block
drawing. After power is applied the system will start operating, the cooling system will
start and the cooling fan will begin to draw air through the enclosure.
As standard, 230 V 50 Hz AC is supplied but. other voltages, e.g. 115 Volt 60 Hz are
available on request. The operating voltage must be specified prior to delivery as the
units are voltage specific and not switchable in the field.

Installation Manual Pury 250e
12 Manual Pury 250e 2006-06-08
Figure 3 : Electrical connection diagram
1 230 or 115V 50/60 Hz 3 Line power filter
2 Safety shut-down switch 4 Mains supply circuit

Manual Pury 250e Installation
Manual Pury 250e 2006-06-08 13
Figure 4 : Internal 24 Volt power supply diagram
1 24 Volt DC 3 Relay
2 Input 24 V line power circuit 4 Cooling fan
The line power circuit can be connected with 230 or 115 Volts (Check the rating plate for the
correct voltage). The internal power supply for the condensate pump, peltier cooling
elements and electronic control system uses 24 Volts DC. The internal wiring shown in this
diagram is shown for informational purposes only.

Commissioning Manual Pury 250e
14 Manual Pury 250e 2006-06-08

Manual Pury 250e Commissioning
Manual Pury 250e 2006-06-08 15
4. Commissioning
As soon as the cooler is connected to line power, the Peltier element will start
cooling. The display will immediately show the cooling temperature. After
approximately 15 minutes the cooler will reach its temperature set-point.
4.1. Control menu
In this chapter, the temperature control and duty cycle for the condensate pump are
discussed. Default values are set at the factory that immediately guarantee normal
operation and some adjustment may eventually be required to suit local conditions.
The "▲" and "▼" keys alter the values in the display to + and – values. The "Ξ" key
takes you one level higher in the menu. The "↵" key takes you one level lower in the
menu.
▲Ξ
▼↵
Cool 3.0°C and Amb 25.0°C shows a cooler temperature of 3°C at an ambient
temperature of 25°C. The "↵" key takes you to the next level down in the menu.
▲Ξ
▼↵
Setpoint = 3.0°C shows the cooling set-point temperature. By pressing the "▲" and
"▼" keys, the temperature set-point can be altered. A value 3.0° C is the default
value. The "↵" key takes you to the next level down in the menu.
▲Ξ
▼↵
Setpoint EXT T:25°C displays the cooling fan activation temperature and the fan
switches on if the ambient temperature exceeds this value. The "↵" key takes you to
the next level down in the menu.
▲Ξ
▼↵
Diff Ambient T:10°C determines the difference between ambient and cooler
temperature. In this example, the difference is 10°C. This difference indicates the
degree of drying and the 10°C (preset in the factory) may not be reduced or the unit
will switch “off”. Below this point there is a risk that even after the condensate key
displays “off”, the selected temperature <10°C will not be reset.
Diff Ambient
T: 10°C
Setpoint EXT
T: 25°C
Setpoint=
T: 3.0 °C
Cool 3.0°C
Amb 25.0°C

Commissioning Manual Pury 250e
16 Manual Pury 250e 2006-06-08
This relay contact can be used, for example, in conjunction with a contact input in the
CWD 2000 Gas Calorimeter to alarm a system shut-down or used by the customer
as a discrete alarm contact. The maximum value of Diff Ambient is 25°C and any
higher value is not permitted by the system. The "↵" key takes you to the next level
down in the menu.
▲Ξ
▼↵
Depending on the dew point of the gas, more or less liquid condensate will be
removed after drying. The volume of condensate removed is indicated in ml/h and
the accumulated condensate volume can be calculated by using the tables in
Chapter 10, The condensate pump will then automatically discharge the required
volume of condensate from the system, at predetermined intervals.
Note: The correct input of ml/h is worth calculating since it will extend the operating
life of the condensate pump.
From the lowest menu level, the higher menu levels can be accessed via the "Ξ" key,
until the start menu is once again reached.
Pump Amount
V: 5 ml/h

Manual Pury 250e Measurement Principle
Manual Pury 250e 2006-06-08 17
5. Measurement Principle
This chapter describes the various functions of the Pury 250E.
5.1. Functional description
3
4
8
11
10
9
10
8
11
9
10
0000
M C
1
2
6
5
7
Figure 5 : The main components of the Pury 250E
1 Gas inlet 7 Condensate outlet
2 Condensate collector 8 Peltier cooler
3 Filter unit 9 Fan inlet
4 Gas cooler 10 Fan exhaust
5 Gas outlet 11 Control unit
6 Condensate pump
The gas flows into the condensate collector (2) from line (1). Condensed water from
the process gas line is separated from the gas and then it flows through the filter
separation unit (3). The filter unit consists of both coarse and fine mesh filter
elements. Coarse particulates such as naphtha, hydrogen sulfide and dust are
washed out by the reflux action of the liquid condensate. The condensate from the
gas cooler (4) means that the filter is always wet and this increases the cleaning
effect as the return condensate also cleans the filter. The dried and conditioned gas
is supplied from the outlet (5). The condensate pump (6), removes the condensate
from point (7) up to a maximum pressure of 800 mbar. The enclosure has three
cooling air openings (9 and 10). The thermal energy from the Peltier elements is
removed via forced draft and a body (8) with cooling fins. The control unit (11) is
used to set the dew point set-point value and the condensate pump duty cycle.

Maintenance Manual Pury 250e
18 Manual Pury 250e 2006-06-08

Manual Pury 250e Maintenance
Manual Pury 250e 2006-06-08 19
6. Maintenance
During maintenance, all installation and process specific safety instructions must be
observed before work can begin. Maintenance may only be carried out by trained
personnel. Following maintenance, the assembly must be leak tested before being
returned to service.
6.1. Capillary cooler with filter
The wire mesh filter inserts can be steam cleaned or exchanged depending on the
level of contamination. The O-ring seals must also be carefully be checked for
damage and replaced if necessary.
Figure 6 : Capillary cooler with filter unit
1 Top section with O-ring NBR 43x3mm 4 Wire filter- fine mesh
2 Filter seat with O-Ring NBR 43x3mm 5 Wire filter – coarse mesh
3 Condensate collector with O-Ring NBR 45x3mm

Decommissioning Manual Pury 250e
20 Manual Pury 250e 2006-06-08
6.2. Cooling block with fan
Clean the cooling body (6) as necessary for peak performance.
Figure 7 : Cooling block with finned cooling body (6)
6.3. Condensate pump
The tubing on the peristaltic pump should be replaced annually depending on the
pump duty cycle. Note: This is an important safety item since a pump tube failure
may allow gas to escape since it is at line pressure at this point.
7. Decommissioning
Switch the unit off and drain the condensate, the installation location for the gas
cooler must be frost-free. At temperatures below 0°C, condensate may freeze and
destroy the tubing and filter assemblies.