WALKER FILTRATION WS Manual De Instrucciones página 3

GB
Threaded and Flanged Filters, Water Separators
Application:-
Walker Filtration design and manufacture in the UK a comprehensive range of
compressed air and gas filtration products intended for the removal and
separation of air borne contaminants such as oil, water and dust particles. Within
our standard range we offer Rp or NPT
(grade) - A308 (grade) and flanged connections 80-300DN models A391 (grade)
- A12824 (grade) with varying flow rate capacities up to 25000 Nm
scfm). Filters use die-cast aluminium for Rp or NPT threaded models and carbon
steel for DN flanged models.
Filter housing Installation:-
Filters and Water Separators should be installed downstream of aftercoolers,
receivers, at the point of lowest operating temperature and as close to the point
of application as possible. Existing or new pipelines should be purged to remove
any collected debris. Filters are best utilised on mainlines and terminal points,
avoid by pass lines where leaks often occur.
Assembly of pressure equipment and putting into service:-
1. Select position for filter/water separator. It is vital to depressurise new or
existing pipework before installation.
2. Install filter/water separator into pipeline observing vertical orientation and
direction of flow arrow marked on the filter housing. On threaded models,
PFTE tape or sealing compound should be used on pipe threads to ensure a
good seal. Maximum working pressure, maximum operating pressure and
replacement elements are marked on the filter.
3. To allow simple element replacement, ensure adequate space for removal of
filter bowl and bottom flange. See minimum required distance, dimension D
on page 14 for Rp or NPT threaded models, page 15 for DN flanged.
4. Two or more Rp or NPT threaded filters can be bolted together using Walker
connecting kits.
5. Automatic drain valves with manual override are fitted on models A20
(grade) - A308 (grade). Manual drain equipment is provided for medical
sterile, vacuum, dust and medical vacuum filtration.
6. During initial pressurisation of the system, inlet valves should be opened
slowly to reduce inlet velocities until system pressures are stabilised. Check for
leaks before putting filters/water separators into operation.
Maintenance
Good maintenance and routine checks should be carried out to ensure correct
operation and to maintain long-term system reliability.
Note: there are no moving or replaceable parts for Water Separators.
Filter element replacement for Threaded Filters:
Coalescing filter elements will operate indefinitely if they remove only oil. The
pressure differential will increase slowly as the elements remove solid and
particulate matter. This should be monitored by Walker differential pressure
gauges and the elements changed when differential reaches 400 mbar (6 psi) or
if the outlet pressure is lower than that required for a specific application. Filter
elements should be replaced at least every 12 months.
Grade AC, activated carbon elements, will purify compressed air by removing oil
vapour and odours. They must be changed to suit specific applications or at least
every six months. Dust grades will increase in differential pressure as solid
particulate is removed.
WARNING:
AC elements do not remove carbon dioxide (CO
or other toxic gases and fumes
Threaded filter element installation guidelines:-
1. Shut off all compressed air supplies to filter housing.
2. Ensure that the system is fully depressurised.
3. Leave valve override open until all pressure in the filter housing and bowl is
removed.
4. For filters with float operated drains, stand clear and depress manual override
located in the centre of the autodrain.
5. Filters with manual drain valves, stand clear and turn manual valve fully open.
6. After all pressure is removed from the filter, grasp filter bowl firmly A20
(grade) to A55 (grade) or place wrench on hex nut located at base of bowl
A76 (grade) to A308 (grade). Turn bowl anti-clockwise to unscrew filter head.
Strap wrenches can be used on all bowls.
7. On threaded models, remove used element by pulling downwards (and
dispose of element properly taking the necessary health and safety
precautions).
3
⁄ " to 3" parallel connections models A20
1
4
3 /h (15000
), carbon monoxide (CO)
2
8. Check housing O-ring in filter head. Replace if worn or damaged. Ensure that
O-ring seat is clean.
9. Fit new elements with O-rings supplied, check that the O-ring is correctly
positioned in end cap and lubricate threads with a light silicone-free grease.
This allows the bowl to be removed easily during next service.
10. For threaded housings, place filter bowl over element, screw into head and
tighten. Do not over tighten. Close valve on automatic or manual drain valve
equipment.
11. Slowly open inlet and outlet valves and re-pressurise system. Check for leaks
immediately. If leaks occur, depressurise system following earlier instructions,
and inspect filter housing and internal O-ring seals. Re-fit the O-ring checking
that the seat is clean. Re-pressurise system.
Flanged filter element installation guidelines:-
1. Shut off all compressed air supplies to filter vessel.
2. Ensure that the system is fully depressurised.
3. Leave valve override open until all pressure in the filter vessel bowl is
removed.
4. Flanged filters with EDV2000 electronic drain valves may be depressurised by
pressing the manual override facility.
5. On flanged models, remove tie rod nut (s) by screwing anti-clockwise.
Remove element by pulling downwards (and dispose of element properly
taking the necessary health and safety precautions).
6. Remove nuts and bolts from the body allowing the blind flange to be
removed.
7. Check housing O-ring in filter head. Replace if worn or damaged. Ensure that
O-ring seat is clean.
8. Fit new elements with O-rings supplied, check that the O-ring is correctly
positioned in end cap and lubricate threads with a light silicone-free grease.
9. With tie rod elements tighten nuts firmly using integral toggle bar or screw
filter directly onto tie rod.
10. For flanged vessels check gasket. Replace if worn or damaged. Tighten all
bolts evenly around the flanged vessel ensuring a good seal.
11. Slowly open inlet and outlet valves and re-pressurise system. Check for leaks
immediately. If leaks occur, depressurise system following earlier instructions,
and inspect filter vessel and internal O-ring seals. Re-fit the O-ring checking
that the seat is clean. Re-pressurise system.
Torque values
Tightening torques for the fabricated housing flange securing bolts:
Approximate Max Torque (Nm)
Bolt size
M5
M6
M8
M10
M12
M16
M20
M24
WARNING – MISUSE!!
ON MODEL NUMBER A483 (GRADE) AND ABOVE, PROVIDE
SUPPORT UNDER BOTTOM BODY FLANGE BEFORE REMOVING.
BOTTOM BODY IS HEAVY AND IF ALLOWED TO FALL COULD CAUSE
ONLY A COMPETENT PERSON SHOULD ATTEMPT TO FIT FILTER
HOUSINGS AND CHANGE FILTER ELEMENTS.
SERIOUS PERSONAL INJURY CAN RESULT IF THESE INSTRUCTIONS
ARE NOT FOLLOWED
DO NOT REMOVE REPAIR OR REPLACE ANY ITEM ON A VESSEL
WHILST UNDER PRESSURE
DO NOT OPERATE IF THERE IS A LEAK IN VESSEL. IMMEDIATELY
TAKE VESSEL OUT OF SERVICE AND REMEDY LEAK.
DO NOT OPERATE ABOVE MAXIMUM WORKING PRESSURE (MWP)
AT MAXIMUM OPERATING TEMPERATURE.
The ultimate filtration & drying technology
Grade 4.6 Grade 8.8
-
4.54
11
22
38
95
185
320
INJURIES!
6.9
11.7
28
56
98
244
476
822