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VTop Control Valves

M/VTOP-M/E ed. 01 2020

WWW.CONFLOW.IT

Page 23

3.12.5 – ACTUATOR MAINTENANCE

The PSL-AMS actuators are maintenance-free, all the gears are lubricated for life and therefore do not require periodic

lubrication.

During any cleaning, use a dry cloth (not rough and non-abrasive) and do not use detergent

OPERATING ANOMALIES

4.1 – VALVE OPERATING ANOMALIES IN GENERAL

Some problems are outlined below which can occur during operation of the valves and the measures to implement.

PROBLEMS FOUND

CAUSE

MEASURE

The stem does not run the entire

stroke and/or stroke incomplete

1. The actuator is not calibrated

1. See page no. ?

2. Waste deposits between

compartment and plug

2. If seizure not generated, remove

deposits

3. Indicator label movement

compared to index

3. Reposition the stroke reference

based on index

4. The instrumentation does not

supply the correct signal and is

necessary to execute stroke

4. Search the causes on the

instrumentation

The stem moves in jolts

1. Stem seized and/or damaged

1. If possible, polish the stem,

otherwise replace the “trim”

2. Sediment in packing chamber

2. Replace the bonnet with packing

Heavy seal

compartment/plug leak

1. Soft seal class VI damaged

1. Replace the soft seal class VI

2. Metal seal class IV or V damaged 2. If possible, grind the cone of the

plug with the edge of the

compartment with “grinding

paste”

Otherwise, replace the trim

3. Differential pressure between

upstream and downstream of the

valve too high

3. Contact our Servicing to ask for a

quote for replacement, if possible,

of the actuator

Packing leak

1. Worn rings or seals

1. Replace the bonnet with packing

2. Soft seal broken

2. Given the complexity of the

operation, contact our Servicing

Содержание 20VT EP

Страница 1: ...M VTOP M E 05 2020 Installation and Maintenance Manual Electric Valves Type 20VT EP Type 50VT EP WWW CONFLOW IT Servicing Departmet E mail servicing conflow it ...

Страница 2: ......

Страница 3: ...F PSL 320 325 AMS on request 9 3 3 COVER REMOVAL 10 3 4 ELECTRICAL POWER SUPPLY 10 3 4 1 WIRING DIAGRAMS 11 3 4 2 MONOFASE AC DC MONOPHASE MAIN POWER SUPPLY 12 3 4 3 AC THREE PHASE MAIN POWER SUPPLY 12 3 5 INTERFACES 13 3 5 1 COMMUNICATION INTERFACES 13 3 5 2 INPUT TERMINALS 13 3 5 3 OUTPUT TERMINALS 14 3 6 ACCESSORIES 15 3 6 1 ANTI CONDENSATE RESISTOR Optional on request 15 3 6 2 ADDITIONAL LIMIT...

Страница 4: ...UATOR MAINTENANCE 23 4 OPERATING ANOMALIES 23 4 1 VALVE OPERATING ANOMALIES IN GENERAL 23 4 2 OPERATING ANOMALIES ACTUATOR LIST OF ERRORS 24 5 RISK ANALYSIS 26 6 ATEX ON REQUEST WITH SPECIAL ACTUATOR EXECUTION 28 7 LIST OF RECOMMENDED SPARE PARTS 28 7 1 COMPONENTS SUGGESTED FOR COMMISSIONING AND START UP 28 7 2 COMPONENTS AFTER 2 YEARS OF OPERATION 28 8 DECLARATIONS OF CONFORMITY ACCORDING TO DECL...

Страница 5: ... remove the stroke label which is the main reference for valve calibration ATTENTION The electrical actuator must be handled solely and exclusively by competent and authorised staff ATTENTION Before removing the cover of the actuator ensure the main power supply is disabled preventing any possible involuntary removal The live areas must be isolated before starting to work ATTENTION Ensure the actu...

Страница 6: ...compliance with standard EN 60529 ATTENTION During installation of the valve leave sufficient space to allow recover of the cover see Fig 2 ATTENTION EXTERNAL USE When using the actuators in environments with temperature fluctuations or high humidity you are advised to use an anti condensate resistor as well as a higher degree of protection optional accessories 3 ELECTRIC VALVES TYPE 20VT EP 50VT ...

Страница 7: ...as valve electrical actuators The actuator is assembled on the value using small columns The mechanical power is generated by a 24 volt DC motor which is controlled electronically using pulse width modulation PWM The motor torque is transmitted from a series of cylindrical gears to a trapezoidal screw The screw converts the torque produced into an axial force with a screw drive The vertical linear...

Страница 8: ...series devices ATTENTION Do not exceed the electrical limit switch setting using the handwheel The mechanical limits must be correctly set If these instructions are not observed damage or malfunctions of the actuator can occur Do not activate the handwheel using excessive force If these instructions are not observed damage or malfunctions of the actuator can occur ATTENTION The actuators on reques...

Страница 9: ...is recommended every 600 working hours or when the stem moves in a linear manner You are advised to use anti seize molybdenum disulfide grease for temperatures 200 C 3 3 ACTUATOR ASSEMBLY ON VALVE The valves are supplied calibrated and tested ready to work with the actuator assembled in the conditions requested by the client during the order phase 3 3 1 ACTUATOR REPLACEMENT ASSEMBLY OF PSL 202 214...

Страница 10: ...e upper end Place the actuator on the valve The small columns are screwed in with hexagon socket head cap screws inserted under the flange 4 With the stem downwards move the coupling until the stem touches the valve Screw in the joint for 12 mm on stems M10 and 16 mm for stems M14 5 6 Fasten the coupling joint Tighten the locking screws crossways with 8 ...

Страница 11: ... stem Secure the coupling joint using a counter a counter nut item 2 Move the valve stem with the coupling joint and the Belleville washers item 9 in the screw drive screwing the rotary nut on the bottom using the cross key supplied Move the small columns item 10 into the holes of the assembly flange and screw in with the locking screws ATTENTION Before the locking screws are screwed in ensure the...

Страница 12: ...rical connection there is no need to remove the cover PSL320 AMS PSL 325 AMS IP65 Unscrew the locking screws of the actuator Pull the cover upwards 3 4 ELECTRICAL POWER SUPPLY ATTENTION The electrical connection work can only be carried out by authorised staff When electrical works are carried out safety regulations must strictly be complied with observe the standards EN 60204 1 VDE 0113 part 1 to...

Страница 13: ... comply with the standards DIN IEC 60364 4 41 responsible protection class I protection class III 24V AC 24V DC and also the standard DIN IEC 60364 4 44 in compliance with the overvoltage categories of the actuator ATTENTION Mechanically protect all the connection and control cables with specific measures against the terminals against accidental release never install power supply and control cable...

Страница 14: ...thickness can vary from 0 14 mm to 2 5 mm as well as a PE screw on the structure Comply with the power supply and the maximum power of the actuator as indicated on the actuator label Connect the power supply and command lines to the terminals as outlined in the electrical diagram 3 4 3 AC THREE PHASE MAIN POWER SUPPLY ATTENTION Disconnect electricity and protect yourself from any possible unauthor...

Страница 15: ...control within a range of 0 20 Ma or 0 10 V split range is also possible 3 5 2 2 Feedback signal for process control Optional on request The terminals from 15 to 17 are used to receive process sensor feedback an optional on request process controller in a range of 0 20 Ma or 0 10 V ATTENTION The following binary inputs 3 5 2 3 and 3 5 2 4 have priority over the control signal if the actuator is pa...

Страница 16: ...ion points of the optional additional signalling limit switch can be freely calibrated via cams Terminals 18 19 and 20 21 are clean opening or closure contacts The standard signals are calibrated to 230 VAC 5 The special limit switches with gold plated contacts are available for low power up to 100 Ma and 30V 3 5 3 3 Power supply for process sensor The terminals 14 and 17 offer the advantage of no...

Страница 17: ...ed separately To replace the resistor connect two cables to the terminal of the motherboard as represented in the image on the left The anti condensate resistor is available in two different versions for 24 VAC DC or 115 230 VAC Choose the voltage of the actuator based on the voltage Assembly of the resistor must be carried out in the position indicated on the base using the screws supplied turn t...

Страница 18: ...side the terminal box under the communication port 3 8 COVER CLOSURE PSL 202 PSL 210 AMS IP65 See the label on the cover of the actuator ATTENTION Ensure the cover is not assembled correctly and does not interfere with movement of the handwheel stem Insert the cover in the two reference internal notches PSL 214 and PSL 202 110 AMD IP67 Place the cover on the actuator and ensure the two locking scr...

Страница 19: ...ees the planned maximum force torque each time it reaches the final position If the closure point inside the valve is modified for example when the seal gasket is worn the actuator will move forward based on its actuation range trying to reach the planned force torque 3 9 1 2 Automatic positioning limitation In normal operation the actuator stops in the position it was in as the mechanical stop of...

Страница 20: ... the valve is moving in both the limit positions 2 3 Fixed green light The valve has successfully started and is ready to enter in operation 3 10 2 MANUAL COMMISSIONING 1 2 Connect the PSCS USB cable to the PC and start the software Select the type of actuator and the program interface 3 4 Select Operate Commissioning and confirm with OK During manual commissioning ensure the correct value for the...

Страница 21: ...VATE THE ACTUATOR ELECTRICALLY FROM NOW ON YOU CAN EXTRACT THE YOKE ACTUATOR AND ANY COMPONENT CONNECTED 3 12 1 BODY GASKET REPLACEMENT ATTENTION IF THE VALVE IS FITTED WITH A SOFT SEAL CONSIDERING THE COMPLEXITY OF THE OPERATIONS FOR BODY GASKET S REPLACEMENT YOU ARE ADVISED TO CONTACT OUR SUPPORT SERVICE For valves 20VT EP Fig 20VT EP 50VT EP Fig 50VT EP proceed as follows unscrew the nuts ref 1...

Страница 22: ...e locking nuts ref 12 that tighten the bonnet ref 9 at the same time remove the overall actuator with the bonnet and trim connected and then proceed as follows unscrew the nuts ref 17 unscrew and remove the entire stem ref 7 unscrew the packing bush ref 16 with a hooked iron tool gently extract the packing rings ref 15 the packing washer ref 13 the packing spring ref 14 blow and clean the packing ...

Страница 23: ... 9 simultaneously remove the overall actuator with the bonnet and trim connected then proceed as follows extract in sequence the cage ref 4 the compartment ref 2 with gasket ref 3 fitted As for the first operation clean the compartment and replace the compartment with the new gasket Unscrew the nuts ref 17 unscrew and remove the entire stem ref 7 combined with the plug ref 5 replace the trim with ...

Страница 24: ...place the ring 5c then tighten the nuts according to the table indicated in the figure For the DN 65 50 valves Fig SOFT TRIM DN65 200 For the DN65 200 valves it is forced precise inside the cage to guarantee sealing of the rings EK3245 pay attention during removal unscrew the locking nuts ref no 5k dismantle the bottom ref no 5j remove the seal ring 5i Carefully clean the compartments and proceed ...

Страница 25: ... compared to index 3 Reposition the stroke reference based on index 4 The instrumentation does not supply the correct signal and is necessary to execute stroke 4 Search the causes on the instrumentation The stem moves in jolts 1 Stem seized and or damaged 1 If possible polish the stem otherwise replace the trim 2 Sediment in packing chamber 2 Replace the bonnet with packing Heavy seal compartment ...

Страница 26: ...r does not close the valve correctly 1 The actuator was not correctly commissioned 2 The actuator force torque too low 1 Repeat commissioning 2 Check actuator selection X X The actuator is working but does not respond to the control signal variation 1 The fixed digital signal is on 2 The actuator is configured to work with a process controller 1 Check setting of the control signal see AMS PSCS ins...

Страница 27: ...polarity 2 Ensure correct feedback range of the process 3 Check the process sensor and its power supply Errors inside actuator environment Possible causes Possible solutions X X The actuator goes to the preselected position 1 The safety binary signal is applied 2 Power supply errors in actuators with PSCP option 1 Disconnect the signal 2 Check power supply X X Control signal disconnected or outsid...

Страница 28: ...provisions of the Directive PED 2014 68 EU The provisions are also indicated to comply with to avoid them arising The classification of the SOLUTIONS implemented is as follows 1 Solution to eliminate and or reduce the risk 2 Application of the appropriate safety measures against the risks which cannot be eliminated 3 Information for users CAUSE EXCESS PRESSURE OVER THE MAXIMUM PERMITTED PRESSURE P...

Страница 29: ...ected by a cover IP65 do not remove it without sectioning or isolating the power supply voltage 5 A switch must be planned and signalled by a specific sectioning insulation label on the actuator The system must correspond to standards DIN IEC 60364 4 41 responsible protection class I protection class III 24V AC 24V DC and also the standard DIN IEC 60364 4 44 in compliance with the overvoltage cate...

Страница 30: ... support structures and the relevant anchorage and or foundation tie rods must be calculated in advance 6 ATEX ON REQUEST WITH SPECIAL ACTUATOR EXECUTION 7 LIST OF RECOMMENDED SPARE PARTS 7 1 COMPONENTS SUGGESTED FOR COMMISSIONING AND START UP BODY UNIT GASKETS SET composed of No 1 compartment gasket No 2 body gaskets no 1 Type 20VT no 2 Type 50VT No 1 packing package PLUG SEAL CLASS VI SET compos...

Страница 31: ...nformità utilizzata Conformity Assessment procedures followed Buona Prassi di Ingegneria SEP CERTIFICATO DI CONFORMITA I prodotti sono stati verificati e ispezionati rispetto al nostro Sistema Controllo Qualita UNI EN ISO 9001 Noi certifichiamo che questo prodotto corrisponde alla Vostra richiesta e che le sue caratteristiche sono in conformita con le nostre specifiche tecniche CERTIFICATE OF CONF...

Страница 32: ...dulo C2 Conformità al tipo basata sul controllo interno della produzione unito a prove delle attrezzature a pressione sotto controllo ufficiale effettuate a intervalli casuali by TECNO Module C2 Conformity to type based on internal production control plus supervised pressure equipment checks at random intervals by TECNO TECNO Srl Via A Colla 7 2 17014 CAIRO MONTENOTTE SV ITALY Organismo Notificato...

Страница 33: ...9 Gli Attuatori Elettrici a bordo valvola sono conformi alle seguenti Direttive Electric Actuators on valve board are conformed to following Directives Costruttore Manufacturer PS Automation GmbH Phlllp Kramer Ring 13 D 67098 Bad Dürkhelm Date of Issue Data di rilascio 22 11 2019 Via Lecco 69 71 20864 AGRATE BRIANZA MB ITALY ...

Страница 34: ... Allegato IIB Direttiva Macchine 2006 42 CE è disponibile su richiesta presso l uffico vendite Mail vendite conflow it va compilata con i dati di commessa ordine cliente Tipo Valvola Tipo Attuatore Serial N The Declaration of Incorporation Annex IIB to Machine Directive 2006 42 EC is available on request from the sales office Mail sales conflow it must be completed with the order acknoledgemnt cus...

Страница 35: ......

Страница 36: ...Servizio Assistenza Servicing Department Via Lecco 69 71 20864 AGRATE BRIANZA MB ITALY Tel 39 0 39 651705 650397 Fax 39 0 39 654018 E mail servicing conflow it Web www conflow it ...

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