Advanced Fluoropolymer Devices GmbH
Hooghe Weg 16, 47906 Kempen, Germany
Email: sales@gft9.shop
Web: http://gft9.shop
Phone: +49 2152 9148591

Kroppsidentifiering:
Följande är synligt på kroppen enligt DIN EN 19 och AD 2000 A4:

• Nominell storlek
• Nominellt tryck
• Kroppsmaterial
• Tillverkarens identifiering
• Smältnummer/gjuteriets identifiering
• Gjutningsdatum
  

Alla skruvar är smorda, dra åt dem i diametralt motsatt ordning! De angivna åtdragningsmomenten för rörskruvar och kroppsskruvar får inte överskridas. För undantag, se avsnitt 8, Flänsanslutningsventil/rör läcker. Följande åtdragningsmoment rekommenderas.

This operating manual contains fundamental information which is to be observed during installation, operation and maintenance.It must be read before installation and commissioning!
This operating manual must always be available at the place of use of the valve.
For valves which are used in potentially explosive areas, see section 3.
Installation, operation and maintenance are to be performed by qualified staff.
The area of responsibility, authority and supervision of the staff must be regulated by the customer.

It is imperative to observe warnings and signs attached directly to the ball valve and they are to be kept fully legible.
Non-observance of the notes on safety may resulting the loss of any and all claims for damages.

For example, non-observance may involve the following hazards:

• Failure of important functions of the valve/plant.
• Risk to people from electric, mechanical and chemical effects.
• Risk to the environment through leaks of hazardous substances.
  

GFT9 trainers of the series GSO are pressure-maintaining components in accordance with the Pressure Equipment Directive (PED) for the passage of fluids and the filtering of particles of a defined grain size. The strainer serves to remove solid or suspended matter from the medium being conveyed. It protects the downstream equipment from this filtered-out material and thus from damage.

The valves are suitable for non-boiling liquids of group 1 in acc. with the Pressure Equipment Directive (PED). Solids can lead to increased wear, damage to sealing surfaces or to a reduction in the service life of the valve.

In case of the valve is intended for operating data other than those intended, the customer must carefully examine whether the design of the valve, accessories and materials are suitable for the new application (please consult the manufacturer).

If a valve is used, the operator must ensure that

• hot or cold valve parts are protected by the customer against being touched
• the valve has been properly installed in the pipe system
• the usual flow rates are not exceeded in continuous operation.
• an appropriate collection system is used to contain drip leaks/leaks locally and harmlessly.

This is not the manufacturer's responsibility.

Loads caused by earthquakes were not allowed for in the design.

Fire protection to DIN EN ISO 10497 is not possible (plastic lining and plastic components).

The operational reliability of the valve supplied is only guaranteed if it is used properly in accordance with Section 2.1 of this operating manual.

Ventilerna är avsedda för användning i explosionsfarliga områden och omfattas därför av bedömningen av överensstämmelse enligt direktiv 2014/34/EU (ATEX).

Som en del av denna bedömning har en antändningsriskanalys enligt EN 13463-1 utförts för att uppfylla de grundläggande hälso- och säkerhetskraven, med följande resultat:

Ventilerna har inga egna antändningskällor och kan drivas både manuellt och med mekaniskt eller elektriskt ställdon. Ventilerna omfattas därför inte av ATEX-direktivets tillämpningsområde och behöver inte märkas därefter. Ventilerna får dock användas i explosionsfarliga områden.

Kompletterande anmärkningar:

• Elektriska och mekaniska ställdon måste genomgå egen ATEX-bedömning av överensstämmelse.
• Det är absolut nödvändigt att följa alla punkter i avsnittet om avsedd användning vid användning i explosionsfarliga miljöer.

Felaktig användning, även under korta perioder, kan orsaka allvarliga skador på ventilen. Vid explosionsskydd kan felaktig drift leda till potentiella antändningskällor såsom överhettning, elektrostatisk eller inducerad laddning samt mekaniska eller elektriska gnistor. Dessa risker kan endast förhindras genom att ventilen används enligt sin avsedda användning.

Vidare hänvisas till direktiv 95/C332/06 (ATEX 118a), som fastställer minimikraven för att förbättra arbetsmiljön för arbetstagare som kan utsättas för risker i explosiv atmosfär.

Det skiljs mellan två fall vid användning av laddningsbara vätskor (konduktivitet < 10⁻⁸ S/m):

Laddningar kan uppstå på fodrets yta och orsaka urladdningar både inuti och utanför ventilen.

1. Urladdningar inuti ventilen:
   Dessa kan inte orsaka antändning om ventilen är helt fylld med medium. Om ventilen inte är helt fylld — till exempel vid evakuering eller fyllning — måste bildandet av en explosiv atmosfär förhindras, till exempel genom att lägga på ett kvävelager. Det rekommenderas att vänta minst en timme innan ventilen demonteras från anläggningen så att eventuella statiska laddningstoppar hinner avledas. För att säkert undvika antändning ska ventilen alltid vara helt fylld med medium eller så ska ett inert gaslager användas.
   
2. Urladdningar utanför ventilen:
   Om det icke-ledande fodret sticker ut på tätningsytorna eller kommer i kontakt med atmosfären kan urladdningar ske till närliggande ventiler eller komponenter. För att undvika explosionsrisker får atmosfären runt ventilen inte vara explosiv.

Ingen farlig laddning kan uppstå eftersom laddningar leds bort via fodret och ventilhuset (ytresistans < 10⁹ Ω, läckresistans < 10⁶ Ω). Om icke-ledande versioner av enskilda komponenter installeras i ventilen kan de dock begränsa tillåtna ATEX-zoner eller explosionssubgrupper trots den ledande fodringen. I sådana fall ska tillverkaren kontaktas.

Enligt TRGS 727 (Tekniska regler för farliga ämnen — Undvikande av antändningsrisker på grund av elektrostatiska laddningar) uppstår statiska urladdningar i icke-ledande foder endast i interaktion med ett icke-ledande medium. Ansvar för dessa situationer ligger därför hos anläggningsägaren. Statiska urladdningar betraktas inte som antändningskällor som härrör från ventilerna själva.

Ytterligare säkerhetsåtgärder:

• Mediumets temperatur får inte överskrida den temperatur som gäller för motsvarande temperaturklass eller den maximalt tillåtna medietemperaturen enligt denna bruksanvisning.
• Om ventilen är uppvärmd (t.ex. med värmejacka) ska de föreskrivna temperaturklasserna i bilagan följas.
• För säker och tillförlitlig drift ska ventilen regelbundet inspekteras för att säkerställa tekniskt felfritt skick.
• Vid transport av vätskor med slipande partiklar kan ökat slitage uppstå; inspektionsintervallen ska då förkortas.
• Ställdon och elektrisk kringutrustning (t.ex. temperatur-, tryck- och flödesgivare) ska uppfylla gällande säkerhets- och explosionsskyddsbestämmelser.
• Ventilen måste jordas, till exempel med rörskruvar och tandade låsbrickor. Om detta inte är möjligt ska jordningen säkerställas på annat lämpligt sätt, t.ex. med kabelanslutning.
• Tilläggsutrustning såsom ställdon, positionsregulatorer och ändlägesbrytare ska uppfylla relevanta föreskrifter för explosionsskydd och, om tillämpligt, vara ATEX-certifierade.
• Läs och följ alltid säkerhets- och explosionsskyddsanvisningarna i respektive tillverkares manual.
• Plastbeklädda ventiler får inte användas med koldisulfid.

Giltigheten för certifikatet eller tillverkarens deklaration gäller endast om drift- och underhållsinstruktionerna har lästs och följts.

• Genomför regelbundna underhållsintervaller och kontrollera skruvförbandens täthet. Dra åt dem vid behov.

Hantera de transporterade varorna med försiktighet. Skydda ventilen mot stötar och kollisioner under transporten.

Kontrollera omedelbart efter mottagandet att leveransen är komplett och att inga transportskador har uppstått.

Skada inte lackskyddet.

Om ventilen inte installeras omedelbart efter leverans ska den förvaras på rätt sätt.

Ventilerna ska förvaras i ett torrt, vibrationsfritt och väl ventilerat rum med så konstant temperatur som möjligt.

Skydda elastomerer mot UV-ljus.

Generellt bör lagringstiden inte överstiga 10 år.

Det är absolut nödvändigt att bifoga ett säkerhetsdatablad eller allmänt säkerhetsintyg för användningsområdet vid returförsändelser.

Kontakta tillverkaren för mer information i detta avseende.

Uppgifter om säkerhetsåtgärder och sanerings-/dekontamineringsåtgärder ska anges.

Delar av ventilen kan vara förorenade med ämnen som är skadliga för hälsan eller miljön, varför rengöring inte alltid är tillräckligt.

Använd skyddskläder när arbete utförs på ventilen.

Innan ventilen kasseras:

• Samla upp eventuellt utläckt medium och kassera det enligt lokala bestämmelser.
• Neutralisera eventuella mediumrester i ventilen.
• Separera ventilens material (plast, metall etc.) och kassera dem enligt lokala regler och föreskrifter.
  

• Examine valve for in-transit damage, damaged sample valves must not be installed.
• Before installation the valve and the connecting pipe must be carefully cleaned to remove any dirt, especially hard foreign matter.
• During installation, pay attention to the correct tightening torque, aligned pipes and tension-free assembly.

Leave protective caps on the flanges until just prior to installation.
Where there is a particularly high risk of damage to the plastic sealing surfaces, e.g. if the mating flanges are made of metal or enamel, PTFE-lined gaskets with a metal inlay should be used. Contact the Manufacturer for further discussion.

The direction of flow must be observed when installing the valve. It is indicated by a direction arrow on the valve body.
The installation position must always be such that the strainer can be drained from the bottom when the strainer basket is removed.
An incorrect installation position can result in a drop in performance or failure of the function.
Observe remove height A in acc. with the drawing in Section 10.3.

The valve must be grounded. This can be achieved in the simplest way via the pipe screws using tooth lock washers. One pipe screw per flange is underlaid with toothed disks.

Upon customer request a set screw M6 is attached to each flange with a hex nut and washer as an additional earthing connection.

Otherwise grounding must be ensured by different measures e.g. a cable link.

The test pressure PT of a valve must not exceed the value of 1.5 x PS(PN) as per the identification of the valve.

Normally, the valves have been tested for leaks with air or water. Prior to initial operation check cover screws. For tightening torques, see Section 1.6!

To prevent leaks, all connection screws should be retightened after the initial loading of the valve with operating pressure and operating temperature. For tightening torques, see Section 1.6.

• Crystallisation must be prevented, e.g. by heating. Damage to the seat or cone would be inevitable.In extreme cases a leak may occur.
• Increased wear occurs in operation with solids contents.
• Non-observance of the pressure-temperature diagram can lead to damage.
• Avoid excessive contamination as otherwise high pressure losses and damage to the valve may occur.

The local regulations are to be observed when dismantling the valve!

After dismantling, immediately protect the valve flanges against mechanical damage by using flange caps. See also Section 6.1.

Possible Causes:

• Oversized particles in process stream
• Mesh size too small for application
• Debris accumulation exceeding basket capacity
• Increased solids loading upstream

Solution:

1. Depressurize system and isolate strainer (Section 7.3)
2. Remove top cover and extract strainer basket (Section 9.2)
3. Inspect filter mesh for damage (tears, excessive debris)
4. Clean basket per Section 9.3 or replace if mesh damaged
5. If recurring issue: Consider larger mesh size or increased cleaning frequency
6. Install pre-filtration upstream to reduce particle loading
7. Monitor differential pressure to establish cleaning schedule

Possible Causes:

• PFA lining swelling due to chemical exposure
• Debris wedged between basket and body
• Round cord seal damage or displacement
• Over-torqued covers causing basket compression

Solution:

1. Attempt to pull basket upward using M10 ring bolt
2. If basket will not pull free: Remove top cover completely
3. Push basket upward from below through bottom opening
4. ⚠ NOTE: Cannot push downward (anti-rotation insert prevents this)
5. Clean basket support surfaces in body interior
6. Inspect round cord seal for damage - replace if necessary
7. Verify chemical compatibility (check PFA resistance guide)
8. Ensure covers not over-torqued during reassembly (max 45 Nm)

Possible Causes:

• Cover bolts not torqued correctly
• Gap uneven around cover circumference
• PTFE seal damaged or displaced
• Cover or body flange surface damaged
• Thermal cycling causing bolt relaxation

Solution:

1. Identify leak location (top cover or bottom cover)
2. Check bolt torque: 45 Nm (cross-cross pattern: 1→5→3→7→2→6→4→8)
3. Measure gap at 4 locations (N, S, E, W) using caliper
4. Gap must be even (±0.5 mm variation maximum)
5. If gap uneven: Loosen all bolts, re-seat cover, retorque
6. May exceed torque by 10% if leak persists (max 50 Nm)
7. If still leaking: Remove cover, inspect PTFE seal and flange surfaces
8. Replace PTFE seal if damaged (Section 9.6)
9. Re-torque bolts after first heat cycle (thermal expansion)

Possible Causes:

• Basket clogging (see Problem 1)
• Mesh size too small for particle distribution
• Process viscosity increased
• Flow rate exceeding design capacity

Solution:

1. Monitor differential pressure gauge (if equipped)
2. Compare current ΔP to baseline (clean basket) value
3. If ΔP increased 20-30% above baseline: Clean basket immediately
4. Remove and inspect basket per Section 9.2
5. Verify mesh size appropriate for application
6. Check process conditions: Temperature, viscosity, flow rate
7. If recurring: Establish preventive cleaning schedule
8. Consider installing differential pressure indicator for monitoring

Possible Causes:

• Pressure surge in system
• ETFE mesh installed incorrectly (overlap direction wrong)
• Temperature exceeded mesh rating (>150°C for standard ETFE)
• Material fatigue from thermal cycling
• Sharp debris impact

Solution:

1. Remove strainer basket per Section 9.2
2. Inspect ETFE mesh for tears, holes, or separation
3. If damaged: Replace entire strainer basket assembly
4. Investigate system for pressure spikes (install relief valve if needed)
5. Verify ETFE mesh rated for operating temperature
6. For temperatures >150°C: Order custom high-temp mesh
7. During reinstallation: Verify correct mesh overlap direction (Section 9.4)
8. Pressure test after replacement to verify integrity

Possible Causes:

• Round cord not seated properly in basket groove
• Cord damaged during installation
• Chemical incompatibility causing cord degradation
• Cord compression set (permanent deformation)

Solution:

1. Remove strainer basket per Section 9.2
2. Disassemble basket per Section 9.4
3. Inspect round cord for:
- Cracks or tears
- Compression set (flattened areas)
- Chemical attack (swelling, discoloration)
4. Remove old cord and clean basket bottom groove
5. Install new round cord per Section 9.7
6. Verify cord seats fully in groove (no gaps or protrusions)
7. Reassemble basket and reinstall per Section 9.4
8. Inspect cord during regular maintenance intervals

Daily / Before Operation:

• Visual check for external leaks (covers, flanges)
• Check flush valve operation (if equipped)
• Verify no coating damage or rust spots

Weekly:

• Monitor differential pressure (if gauge equipped)
• Visual inspection of exterior condition
• Check cover bolt tightness (hand-check for looseness)

Monthly:

• Function test flush valve (if equipped)
• Verify flow direction arrow visible
• Check for process fluid staining (potential leak indicator)

Quarterly:

• Torque check on cover bolts (45 Nm - cross-cross pattern)
• Body coating inspection (touch up if needed)
• Basket inspection (may require removal for visual check)

Semi-Annual:

• Remove and clean strainer basket (per application requirements)
• Inspect ETFE mesh for tears or excessive debris
• Check PTFE seals for compression set

Annual / After Heavy Use:

• Full strainer inspection (remove both covers)
• Replace PTFE seals (top and bottom)
• Inspect body interior PFA lining for damage
• Pressure test strainer (verify no leaks)

When Required:

• Clogged basket (high differential pressure)
• Scheduled cleaning interval
• Mesh inspection or replacement
• Round cord seal replacement

⚠ IMPORTANT: System must be fully depressurized and drained before opening

Procedure:

Step 1: Isolate and Prepare

• Close upstream and downstream isolation valves
• Depressurize system completely (verify with gauge)
• Drain residual fluid using bottom flush valve (if equipped)
• Apply lockout/tagout per company procedures

Step 2: Remove Top Cover

• Loosen 8× M12 nuts in cross-cross pattern (gradual loosening)
• Remove nuts and washers (place in clean container)
• Lift top cover vertically off body
• Set cover aside on clean surface

Step 3: Extract Strainer Basket

• Thread M8 ring bolt into central hole on basket top
• Pull basket vertically upward out of body
• ⚠ CAUTION: Residual fluid may drain from basket - have drip tray ready
• If basket sticks: Remove basket support and push from below (Section 8.2)

Step 4: Inspection Before Cleaning

• Check seal ring condition during removal
• Note debris type and quantity (for maintenance records)
• Inspect anti-rotation knob for damage
• Take photos if unusual wear patterns observed

When Required:

• After removal per Section 9.2
• Visible debris accumulation
• High differential pressure indication

Cleaning Procedure:

Step 1: Initial Debris Removal

• Shake out loose debris into appropriate waste container
• If flush valve equipped: Basket can be flushed before removal
• Dispose of debris per process fluid safety guidelines

Step 2: Filter Mesh Cleaning

• Use soft brush to remove debris from ETFE mesh
• Brush from inside to outside (pushes debris out of mesh)
• Avoid metal brushes or abrasive pads (will damage PTFE components)

Step 3: Solvent Cleaning (if required)

• Use approved cleaning solution compatible with process fluid
• Soak basket in cleaning solution if heavily contaminated
• Ultrasonic cleaning permissible (if equipment available)
• Rinse thoroughly with clean solvent or DI water

Step 4: Drying

• Air dry completely before reinstallation
• May use compressed air (low pressure) to accelerate drying
• Inspect for cleanliness using backlighting (hold mesh to light)

Step 5: Post-Cleaning Inspection

• Inspect ETFE mesh for tears, holes, or separation
• ✓ PASS CRITERIA: No visible damage, mesh intact, no embedded debris
• If mesh damaged: Replace basket assembly (Section 9.4)
• If round cord damaged: Replace per Section 9.7

⚠ WARNING: Do not use abrasive cleaners, metal brushes, or high-pressure steam

When Required:

• After cleaning per Section 9.3
• After mesh or seal replacement
• New basket installation

Procedure:

Step 1: Pre-Installation Inspection

• Verify basket clean and dry
• Verify ETFE mesh intact (no tears)
• Verify round cord seal present and properly seated
• Clean body interior if debris present

Step 2: Position Indicator Alignment

• Locate white position indicator knob on basket bottom
• Locate corresponding slot in body interior (PFA-lined cavity)
• ⚠ CRITICAL: Knob MUST align with slot for proper installation

Step 3: Basket Insertion

• Hold basket by top rim
• Align white knob with body slot
• Lower basket vertically into body
• Push down gently until basket seats on bottom seal surface

Step 4: Verify Installation

• Basket should sit flat (no tilting)
• Top rim of basket should be even with body top flange
• Test anti-rotation: Attempt to rotate basket slightly
• ✓ PASS: Basket resists rotation (knob engaged in slot)
• ✗ FAIL: Basket rotates freely - remove and re-align

Step 5: Top Cover Reinstallation

• Position PTFE sealing disc in top cover recess (verify centered)
• Lower top cover onto body (align with studs)
• ⚠ CAUTION: Do not drop cover (protects PFA lining)
• Install washers and nuts (hand-tight initially)

Step 6: Top Cover Torquing

• Torque Pattern: 1→5→3→7→2→6→4→8 (opposite bolt pairs)
• First Pass: 30 Nm (all 8 nuts)
• Second Pass: 45 Nm FINAL (all 8 nuts)
• Monitor gap around circumference during torquing
• Gap should be even (±0.5 mm variation maximum)

Step 7: Final Verification

• Measure gap at 4 locations: N, S, E, W
• Record measurements: _____ mm (all within ±0.5 mm)
• Verify no PTFE seal protrusion visible at joint
• Check flow direction arrow visible

When Required:

• ETFE mesh torn or damaged
• Mesh size change required for application
• Mesh degradation from temperature/chemical exposure

⚠ NOTE: Mesh replacement requires complete basket disassembly

Procedure:

Step 1: Basket Disassembly

• Remove strainer basket per Section 9.2
• Mark position of inner and outer tubes relative to round cord
• Pull round cord out of basket bottom groove (use pliers)
• Rotate and pull outer tube off inner tube assembly

Step 2: Remove Old Filter Mesh

• Unroll ETFE mesh from inner tube
• Note overlap direction for new mesh installation
• Inspect inner and outer tubes for damage
• Clean tubes if residue present

Step 3: Install New Filter Mesh

• Verify correct mesh size (85-2000µm as specified)
• Wrap ETFE mesh around inner tube
• Maintain overlap in same direction as original (typically 20-30mm)
• Ensure mesh covers full length of inner tube

Step 4: Reassemble Basket

• Slide outer tube over inner tube assembly
• ⚠ CRITICAL: Rotate WITH overlap direction (not against)
• Apply even pressure during sliding
• Insert tubes together into basket bottom

Step 5: Install Round Cord Seal

• Align tubes per original position markings
• Press round cord into basket bottom groove
• Cord should seat fully with no gaps or protrusions
• Leave approximately 10mm protruding for future removal

Step 6: Verify Assembly

• Check that mesh is secure between tubes
• Verify round cord seated properly
• Test-fit in body (verify anti-rotation engagement)
• Reinstall per Section 9.4

When Required:

• External leak at cover/body joint
• Annual preventive maintenance
• Seal compression set (permanent deformation)
• Visible damage to seal

Procedure:

Step 1: Cover Removal

• For top cover: Remove per Section 9.2
• For bottom cover: Remove 8× M12 nuts, lift cover off studs

Step 2: Remove Old PTFE Seal

• Lift seal out of cover recess
• Inspect seal for compression set (flattened areas)
• Note any unusual wear patterns for records

Step 3: Clean Seal Recess

• Remove any debris or residue from recess
• Wipe with lint-free cloth
• Verify recess not damaged or deformed

Step 4: Install New PTFE Seal

• Position new seal in cover recess
• Center seal concentrically (equal spacing all around)
• Press seal flat into recess (should sit flush)
• ⚠ CRITICAL: Seal must not protrude above cover surface

Step 5: Reinstall Cover

• For bottom cover: Verify inlet orientation correct
• Install per Section 9.4 (torque to 45 Nm)
• Verify gap even around circumference

Step 6: Pressure Test

• After reassembly, perform pressure test (per company procedures)
• Verify no leaks at reinstalled cover
• Check gap measurement (±0.5 mm)

When Required:

• Internal bypass leakage (reduced filtration efficiency)
• Visible damage to cord during basket inspection
• Cord compression set or chemical degradation

Procedure:

Step 1: Basket Disassembly

• Remove and disassemble basket per Section 9.5, Step 1
• Pull old round cord out using pliers
• Inspect basket bottom groove for damage

Step 2: Clean Basket Bottom Groove

• Remove any residue from old cord
• Clean groove thoroughly with cloth
• Verify groove depth uniform (no damage)

Step 3: Install New Round Cord

• Obtain replacement cord (order correct diameter for size)
• Insert cord into basket bottom groove
• Press cord evenly into place using pliers
• Work around entire circumference

Step 4: Verify Installation

• Cord should seat fully in groove
• No gaps or voids around circumference
• Leave approximately 10mm protruding (aids future removal)
• Cord should not be stretched or compressed

Step 5: Reassemble Basket

• Reassemble per Section 9.5 (reverse order)
• Verify anti-rotation knob intact
• Reinstall basket per Section 9.4

When Required:

• Semi-annual inspection
• After thermal cycling (first 24 hours of operation)
• If leaks detected at covers
• Thread damage suspected

Procedure:

Step 1: Visual Inspection

• Check all 8 stud bolts (top and bottom covers)
• Inspect for corrosion, thread damage, or bending
• Check washers for deformation

Step 2: Torque Verification

• Use calibrated torque wrench
• Check each nut: Target 45 Nm
• Follow cross-cross pattern: 1→5→3→7→2→6→4→8
• If any nut loose: Re-torque all nuts in sequence

Step 3: Thread Maintenance

• If studs corroded: Remove and replace
• Clean threads with wire brush if dirty
• Apply grease to threads during reinstallation
• Verify nuts thread smoothly (no binding)

Step 4: Fastener Replacement

• If threads damaged: Replace stud/nut immediately
• Order correct length: Bottom M12×55, Top M12×45
• Use only stainless steel grade 316 (or better)
• Apply anti-seize to threads during installation

Step 5: Establish Torque Check Schedule

• After initial heat-up: 24 hours
• High vibration service: Monthly
• Normal service: Semi-annually
• Document torque checks in maintenance log

When Required:

• After any cover removal/reinstallation
• After PTFE seal replacement
• After basket replacement
• Annual verification

⚠ NOTE: Pressure testing recommended before returning to service

Procedure:

Step 1: Visual Inspection

• Verify all covers installed and torqued to 45 Nm
• Check no tools or parts left inside strainer
• Verify flow direction correct

Step 2: Low Pressure Test (Air or Water)

• Close downstream isolation valve
• Slowly pressurize to 2-3 bar
• Inspect all joints for leaks
• Listen for air leaks (if using compressed air)

Step 3: Full Pressure Test

• Gradually increase to operating pressure
• Hold pressure for 5 minutes minimum
• Inspect cover joints for leakage
• Check basket area (look for bypass around seal)

Step 4: Leak Detection

• If leak detected: Depressurize immediately
• Identify leak location (cover, seal, basket)
• Re-torque bolts or replace seals as needed
• Repeat pressure test after repair

Step 5: Documentation

• Record test pressure: _____ bar
• Test duration: _____ minutes
• Result: ✓ PASS / ✗ FAIL
• Technician signature: __________
• Date: __________

Recommended Documentation:

• Date of maintenance
• Work performed (basket cleaning, seal replacement, etc.)
• Parts replaced (include part numbers and serial numbers)
• Torque values applied
• Gap measurements (top and bottom covers)
• Pressure test results
• Unusual observations or issues
• Technician name
• Next scheduled maintenance date

Example Maintenance Log Entry:

Date: 2026-01-15
Work: Basket cleaning, top cover PTFE seal replacement
Parts: PTFE seal (P/N: GSO-SEAL-TOP-DN80)
Torque: 45 Nm (verified all 8 top cover bolts)
Gap: 1.2mm average (N:1.2, S:1.1, E:1.3, W:1.2)
Pressure Test: 16 bar × 5 min - PASS
Notes: ETFE mesh in good condition, no tears observed
Tech: [Name]
Next Service: 2026-07-15 (6 months)

Product Strainer
Design Strainer Type-T-Strainer
Serial number
Size DN 25, DN 40, DN50, DN80 DN 100 | NPS 1",
NPS 1½", 2", 3" 4"
EU-Directive 2014/68/EU
Applied Technical Specification DIN EN IS0 12100 AD 2000
Surveillance Procedure 2014/68/EU, TÜV Rheinland Industrie Service GmbH
Notified Body for Pressure ID-No. 0035
Equipment
Conformity assessment. 2014/68/EU / 2014/68/EU
Procedure
Marking 2014/68/EU¹⁾ ≥ DN 25, ≥ 1“


Advanced Fluoropolymer Devices GmbH confirms that the basic requirements of the above specified directives and standards have been fullied
¹⁾ For sizes not listed a marking is not permissible.

Kempen, 17.12.2024

K. Schalm