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STI RTQ Series Instruction Manual

Quarter turn pneumatic actuator
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Quarter turn pneumatic actuator
RTQ Series
Single acting version type RTQS
INSTRUCTION MANUAL 5300

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Summary of Contents for STI RTQ Series

  • Page 1 Quarter turn pneumatic actuator RTQ Series Single acting version type RTQS INSTRUCTION MANUAL 5300...
  • Page 2 P.G.A.Engineering D. Lamoure STI S.r.l has taken every care in collecting and verifying the documentation contained in this Instruction Manual. The information herein contained are reserved property of STI S.r.l. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com...

  • Page 3: Table Of Contents

    MAINTENANCE............................. 20 ............................20 ERVICE LIMIT ..........................20 ERIODIC NSPECTIONS ..........................21 PECIAL MAINTENANCE ..............................27 EPAIRS ACTUATOR LUBRICATION ......................... 28 STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...
  • Page 4 ..........................36 ENERAL INFORMATION 14.2 ..........................36 ECYCLING AND DISPOSAL 14.3 ........................37 PRING CARTRIDGE DEMOLITION DECLARATION OF INCORPORATION ......................38 STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 5: General Information

    1.4 Terms and conditions STI S.r.l. guarantees each single product to be free from defects and to conform to current goods specifications. The warranty period is one year from the date of installation by the first user, or eighteen months from the date of shipment to the first user, whichever occurs first.

  • Page 6: Applicable Standards And Directives

    (with protective wear wear a helmet. protect the protect your the possible clothing. protective eyes. hearing. supplementary footwear. signboard) STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 7: Device Description

    Spring cartridge. Stopper screw assembly. Seal Kit. Position Indicator. Fig. 1: Main parts for RTQS actuator series (Spring to Close configuration) STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 8: Actuator Coding Description

    Spring Size 4 Fail direction Fail to Close Fail to Open Manual overrides Manual handwheel Manual handwheel with reduction Hydraulic hand pump STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 9: Technical Data

    Humidity Class 3 (pressure dew point ≤ -20°C) Oil Class 4 (concentration total oil ≤ 5 mg/m Contractor shall specify the quality of the supply medium considering the above recommendation. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 10: Identification Nameplates

    A simplified standard nameplate can be used for general purpose application when Customer specific requirements are not to be fulfilled. Fig. 2b: Standard Nameplate STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 11: Reception

    90° max Fig. 3a – Lifting points of RTQS actuator series for lifting with vertical stem condition STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 12: Check At The Reception

    If the actuator is delivered separately from the valve, it is necessary to perform the setting after the assembling on the valve according to the next paragraph 8.2. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.

  • Page 13: Storage

    5.5 Interface document and dimensional drawing Pneumatic diagrams, wiring diagrams, dimensional drawing, instruction manual and safety manual (when request) are furnished with document accompanying the actuator. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 14: Installation

    When the insert bush has entered the actuator drive sleeve, check the holes / pin of the valve flange meet the actuator holes and pin, otherwise rotate the mounting bracket to obtain a right assembling. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.
  • Page 15 Alternative bolting in Stainless Steel are permitted i.e. ASTM A193 B8M (Class 2 or 2C) for bolts/screws and ASTM A194 grade 8M for the nuts, provided that yield strength of bolts/screws is not less than 450 MPa. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 16: Pneumatic Connections

    If the earth connection is not guaranteed trough mechanical parts on which the actuator is mounted, it is necessary ensure a directly earth connection using the provided heart point of the actuator. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.

  • Page 17: Operation And Use

    This RTQS actuator is produced by STI srl [Manufacturer] and identified by a nameplate with a product designation code. STI srl will not be liable for any possible damage or physical injury resulting from use in other than the designated applications or by lack of care during installation, operation, adjustment and maintenance of the machine.

  • Page 18: Reasonably Foreseeable Misuse

    Emissions of hazardous substances where natural gas is used as motive energy. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 19: Instructions For The Operator

    To avoid the risk of unsetting the setting screw (5.2) during this last operation, keep the setting screw (5.2) blocked by using an Allen wrench engaged on the on the hexagonal receptacle. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.
  • Page 20 Taking care not to damage it, reinstall the sealing washer (8.4) and screw until it fit into the groove of the spring cartridge bushing (8.1), then block all the system with the nut (8.3). STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.
  • Page 21 When completed the setting operations it is recommended to operate the actuator with pneumatic supply and spring to check that the actuator moves properly and that there are no leakages in the cylinder/circuit. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 22: Manual Override

    To restore the automatic function the selector lever must be rotated 90° clockwise towards the position identified by the label REMOTE. LABEL Fig. 9 – HP device STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...
  • Page 23 In case the actuator is not able to reach fully stroke, verify the position of manual override following the instructions enclosed in the specific Instruction Manuals; remove the label ENGAGED from the handwheels when used. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 24: Maintenance

    Use only STI original spare parts. STI cannot accept responsibility for any damages that occur from using spare parts or fastening materials from other manufacturers. If STI products (i.e. gasket, O-ring, etc) have been on store for longer periods check these for corrosion or deterioration before using these products.

  • Page 25: Special Maintenance

    Pay attention to the residual load due the internal springs: to release the spring tension, the stop screw at the end of spring cartridge must be remove before the cylinder tie rods are opened. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...
  • Page 26 Assemble the proper nuts on the tie rods. Tighten the nuts following the recommended tightening torque shown in the following Table 3 here below, alternating the tightening between opposite corners. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.
  • Page 27 Remove with wrench the broken pieces, install a new tie rod and then tighten the nut. Warning Tightening torque must respect the values shown in Table 3 based on the material stated on note (1). STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...
  • Page 28 Don’t try to open the spring package. This operation can be done only during a decommissioning phase according to the instruction of the next paragraph 14.3 of this Manual STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...
  • Page 29 (5.3) on the cylinder side, remove, remove the cylinder (2) and replace the gasket (5.2), before replace cylinder clean the surface of housing and cylinder head flange. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.
  • Page 30 (5.3) on the spring cartridge side, remove the spring cartridge (3) and replace the gasket (5.2), before replace gasket clean the actuator housing surface and spring cartridge head flange. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev.

  • Page 31: Repairs

    When maintenance requires substitution of parts, repair must only be carried out with STI’s original spare parts. Original spare parts must be required to the STI with reference to the item numbers shown in the next Section 12. To ensure that right spare is provided, serial number printed on the RTQS nameplate must be specified when spares are ordered.

  • Page 32: Actuator Lubrication

    Equivalent products can be used provided that they have the same characteristics and the same range of compatibility with elastomeric and plastic components. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 33: Troubleshooting

    Wrong adjustment of Re-adjust setting mechanical stops Incorrect position of the valve Wrong electric limit Re-adjust setting switches indication. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 34: General Assemblies And Parts List

    12 GENERAL ASSEMBLIES and PARTS LIST This Section includes the drawings and parts lists of each component and subassembly of RTQ series. 12.1 Scotch yoke mechanism Scotch yoke mechanism part list Spare Parts Item Description Material Guide Bar Alloy steel...

  • Page 35: Pneumatic Cylinder

    (*) NBR standard material for temperature range from -30°C up to +100°C; special material available for -60°C. (**) Quantity depends on the model. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 36: Stopper Assembly For Pneumatic Cylinder

    Stopper assembly part list Item Description Material Spare Parts Stainless Steel Protection Washer Stainless steel Setting screw Stainless steel PTFE Sealing washer STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 37: Spring Single Package Cartridge

    Carbon steel Stem Alloy steel Plug Carbon steel End flange Carbon steel Cartridge tube Carbon steel (*) Only when requested STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 38: Spring Double Package Cartridge

    Carbon steel Stem Alloy steel Plug Carbon steel End cap Carbon steel Cartridge tube Carbon steel (*) Only when requested STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 39: Stopper Assembly For Spring Cartridge

    Important Recommended spare parts are marked with # in the previous tables. Individual kit, including all the recommended spare parts, can be ordered to STI provided that serial number of the actuator or specific purchasing order for the original actuator is indicated in the request.

  • Page 40: Decommissioning

    Important: In all cases check local authority regulation before disposal. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09...

  • Page 41: Spring Cartridge Demolition

    Cut all the spring coils accessible from the slot, to release the spring tension. Now the spring cartridge is ready for disassembling and demolition. Fig. 20 Slot into spring container STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...

  • Page 42: Declaration Of Incorporation

    15 Declaration of Incorporation STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5300, rev. 09 06/2020 – RTQS...
  • Page 44 IMI STI - Headquarters Via Dei Caravaggi 15 24040 Levate (BG) Italy Tel. +39 035 2928.2 Fax +39 035 2928.247 IMI STI – Quarter Turn Division Via San Francesco 18 29017 Fiorenzuola d’Arda (PC) Italy Tel. +39 035 2928.2 Fax +39 0523 1715.295...

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