These operating instructions are delivered with each
product. Malfunctions, damage or injury may occur
if these instructions are not followed.
DESCRIPTION
Series 342 Air Filter Regulators are designed for use in potentially
explosive atmospheres caused by gases, vapors, mists and/or dusts as
per ATEX Directive2014/34/EUand standards EN ISO 80079-36.
Classification (Zone 1 and 21) : II 2 G Ex h IIC T5 Gb, II 2 D Ex h
IIIC T5 Db (T5- 90°C Ambient Temperature).The Classification
temperature depends on the ambient temperature. These regulators
are made of stainless steel with option compliant to NACE MR0175.
All metalon conductive parts must be inter connected and grounded.
Startup and maintenanceare to be performed as detailed below.
General
This component is not a safety accessory. It is intended only for the
compliant use either as an individual component or incorporated in
an apparatus, machinery and installations. ASCO Stainless Steel Air
Filter Regulators are designed to be operated in accordance with the
limits specified in the nameplate or as specified in this document. All
applicable directives, legislations, orders and standards, as amended
from time to time, as well as state-of-the-art practices and procedures
must be observed for intended scope of application of the product.
Where applicable take all appropriate measure to ensure the
requirements are met. This device complies with the essential safety
requirements of the EU PED 2014/68/EU. Declaration of conformity
is available on request..
All assembly, operation, use and maintenance must be
performed by qualified, authorized personnel. Personnel working
with the components must be familiar with the applicable safety and
regulations relating to the components, apparatus and machinery
installations. In case of problems, please contact ASCO or one of its
authorized representatives in your region.
General Operating Specifications
Fluid : Instrument air, neutral,natural & Sour gas.
Ambient Temperature: For manual drain: the temperature range
should be within -40 C to + 90 C (-40F to +194F);For Auto
drain: the range should be within 0°C to + 90°C (32°F to +194°F) ;
Inlet Pressure: Do not exceed the maximum operating pressure 20
bar(290psi) for manual drain FR, 11bar(160psi)for auto drain FR
Quick relief option available for standard operating temperature
-40°C to +90°C
INSTALLATION
• Check the preliminary storage conditions required for the
component. They must be in accordance to the product’s
specifications.
• Carefullyremove the Regulatorfrom the packaging.
•Power off and depressurize the apparatus, machinery or installation
designed to receive the FR.
•Install the FR near where the air is to be used.
•Install ASCO pressure gauge comes accessory on the frontal gauge
port. & Do Not modify the device.
•Make sure that the fluid is compatible with the materials it contacts.
•Operator or user must ensure that the gas group corresponds to the
product’s classification.
•Check Nameplate for correct catalog number, pressure, temperature
and service. Never apply incompatible fluids or exceed pressure
rating of the regulator.
• The installer must install the air filter regulator at the user’s
location in accordance with the requirements specified in Directive
99/92/EC.
Positioning
Installation &Maintenance Instructions
STAINLESS STEEL FILTER REGULATOR (High Flow)
SIZE : ¼” – ½”
ST.STEEL VERSION
342 SERIES
Piping
Connect piping to valve according to markings on FR body.
Apply pipe compound sparingly to male pipe threads only. If
applied to FR threads, the compound may enter the FR and
cause functional difficulty. Avoid pipe strain by properly
supporting and aligning piping. When tightening the pipe, do
not use the FR as a lever. Locate wrenches applied to piping
as close as possible to connection point.
Direct Frontal mountingor mounting with bracketspossible.
MAINTENANCE
NOTE: Ensure the air supply is completely stopped. It is not
necessary to remove the FR from the pipelinefor repairs.
Cleaning
All FRs should be cleaned periodically. The time
between cleanings will vary depending on the medium and
service conditions. The most common part that requires
cleaning is the filter element.
Use running water for regular cleaning or a mild
detergent for cleaning the filter element. Do not use diluted
acids, strong detergents or corrosive chemicals.
For auto drain version clean the filter ring periodically.
Causes of Improper Operation
• Incorrect pressure: Check upstream pressure. Pressure
to FR must be within range specified on nameplate.
• Excessive Leakage: Disassemble FR and clean all parts.
If parts are worn or damaged, install a complete ASCO
Spare Parts kit.
Manual drain operation:
Hold the knurling face of drain with fingers & rotate it to the
anti clockwise direction looking from top to unscrew the
manual drain to purge out the water that accumulated in the
bowl. After draining out, screw the manual drain back to its
original position & ensure proper working of AFR.
Automaticdraining:
ASCO SS-AFR auto drain provides hassle free draining
of equipment which purge out the water accumulated in the
bowl automatically. Flexible tube (Barb connection)/
Hard piping (Adapter1/8”NPT-optional) can be used for
collecting the condensate. It also provides manual drain
feature integrated with automatic drain. Use spanner to
operate thesame with the flat provided on it.
Page 1 of 3
Part Name
Torque Value
Pound-inches
Torque Value
Newton-Meters
M5
Screw in Filter Sub-
Assy
90 ± 10
10 ± 1
All M6 Fasteners
Filter Sub-Assy to Body
Full Hand tight Full Hand tight
Exhaust Filter
(As Applicable)
70
± 10
8
± 1
Manual drain Full hand tight Full hand tight
Auto drain 160 ± 10
18 ± 1
Adapter 160 ± 10
18 ± 1
Torque Chart
To Drain Rotate: (Looking From Top)
Anticlockwise to drain, Clockwise to close
Adapter1/8”NPT-
Optional
Auto Drain Manual
Override
Manual Drain
For optimum life and performance, the FR should be
mounted vertically upright (Max. Inclination 5°).
ASCO Numatics(India) Pvt. Ltd.,
No. 57, KundrathurMain Road, Gerugambakkam,
Chennai-600128, India
Form No. IM-IND-430162 -001 Rev PB
ECN No : 305463
Valve Disassembly
1. Disassemble valve in an orderly fashion using
exploded views for identification and placement of
parts. Refer to Figure 1.
2. Remove bowl by unscrewing the fasteners and the
bowl seal.
3. Unscrew the filter sub-assembly by hand itself.
4. Remove the M5 Screw in the Filter assembly and
remove the filter element for cleaning.
5. For normal maintenance (cleaning) it is not necessary
to remove the valve seat. However, if valve seat
removal is required,just pull it out of the body.
6. Remove the manualdrain/auto drain from the bowl.
7. Remove bonnet screws, valve bonnet, top springs and
diaphragm assembly.
8. All partsare nowaccessible to clean or replacement. If
parts are worn or damaged, install a complete ASCO
Spare Parts kit.
Use Metal Pipes only for IN and OUT
connection. For Non – Metallic / Non – conductive
pipes requires EARTHING OR GROUNDING
that can be given in any one of front side M6
mounting hole shownas
- Service Notice –
When installing a new ASCO Spare Parts kit, the parts
supplied are shown in Figure 1 . The parts supplied are
new and a direct replacement for the present parts
provided all new parts areinstalled.
CAUTION : To ensure proper valve operation, install
all parts supplied in ASCO Spare Parts kit. Do not mix
old and new parts.
Valve Reassembly
1. Lubricate all gaskets with MOLYKOTE ® 111
lubricant or an equivalent low temperature silicone
fluid.
2. Add a layer of NEVERSEEZ NS-160 on all screw
threads.
3. If removed, install poppet valve seat in body. Apply a
small amount of NEVERSEEZ NS-160 to Filter sub
assembly threads. Hand tight the assembly as far as
possible. No special tools requiredto provide torque.
4. Install Diaphragm Assembly, springs, spring disc and
bonnet on top and fasten M6 screws as per the torque
specified in torque chart.
5. Replace manual drain/auto drain on bowl and
reassemble the unit using M6 fasteners as per the
torque specified in torque chart.
6. Install FR in vertical position.
WARNING: To prevent the possibility of
personal injury , property damage, Ensure
below mentioned testing should complete
before returning to service of FRL. Perform
internal seat and external leakage tests with a
non-hazardous, non-combustible fluid. Wrong
assembly will invalidate the approval. In case
of replacement of parts by the user, the
traceability of the final product cannot be
guaranteed by ASCO and must be ensured by
the user.
7. Restore line pressure to FR.
8. After maintenance is completed, operate the FR a few
times to be sure of proper operation and installation.
ORDERING INFORMATION FOR
ASCO SPARE PARTS KIT
Parts marked with a star ( ) in the exploded view are
supplied in Spare Parts Kit. When ordering Spare Parts Kit
for ASCO FRs, order the Spare Parts Kit number indicated
on the nameplate / label. If the number of the kit is not
visible, order by indicating the number of kits required, and
the catalog Number and Serial Number of the FR(s).
Page 2 of 3
ASCO Numatics(India) Pvt. Ltd.,
No. 57, KundrathurMain Road, Gerugambakkam,
Chennai-600128, India
Form No. IM-IND-430162 -001 Rev PB
ECN No : 305463
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