STI SC Series Instruction Manual
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STI SC Series Instruction Manual

Linear hydraulic actuator, single acting version
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Linear hydraulic actuator
SC/VH Series
Single acting version type SC/VHS
INSTRUCTION MANUAL 5020

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Summary of Contents for STI SC Series

  • Page 1 Linear hydraulic actuator SC/VH Series Single acting version type SC/VHS INSTRUCTION MANUAL 5020...
  • Page 2 G. Alfieri A. Negri 27/09/2017 Revision N. Mores G. Alfieri 25/07/2017 Issue N. Mores G. Alfieri Date Revision Description Compiled Approved STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 3 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 4: Table Of Contents

    ) ......................29 ALVE ADAPTATION ASSEMBLY OPTIONAL 10.3 ) ................30 TOPPER PROTECTION ASSEMBLY FOR CYLINDER WHEN SUPPLIED SPARE PARTS ............................30 STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 5 DECLARATION OF INCORPORATION ......................32 ACTUATORS TO BE PLACED ON THE MARKET IN GREAT BRITAIN (ENGLAND, WALES AND SCOTLAND ..33 STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 6: General Informations

    24040 Levate (Bergamo) – Italy 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 7: Applicable Standards And Directives

    Obligation to obligation (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 5020, rev.03 07/2021 - SC/VHS...

  • Page 8: Device Description

    The actuator pedestal has a flange with threaded holes to fix the actuator to the valve. STI can offer different types of control system according to specific Customer's requirements. 2.2 Identification of the Main Parts The SC/VHS actuator is composed by the following main parts:...

  • Page 9: Actuator Coding Description

    Maximum available pressure 103 Bar Maximum available pressure 207 Bar Maximum available pressure 345 Bar Stroke (mm) Safety action Piston rod Extended Piston rod Retracted STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 10: Technical Data

    Modulating service (on request) The identification label fastened on the actuator contains the main actuator operating condition. It is forbidden to modify the information and the marks without previous written authorization by STI S.r.l. IDENTIFICATION LABEL SC/VHS actuators are suitable to be installed in classified areas Zone 1, 21 and Zone 2, 22 with the degree of protection as marked in the identification label.

  • Page 11: Installation

    For base actuator dimensions and weights please consult www.stiactuation.com Fig. 2 – Lifting points for SC/VHS actuator type STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 12: Reception

    5.6 and 5.7. 5.5 Interface document and dimensional drawing Hydraulic diagrams, wiring diagrams and dimensional drawing are furnished with document accompanying the actuator. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 13: Installation

    • Screw the stud bolts into the actuator pedestal flange, and screw the nuts on the stud bolts. • Tighten according to the nut size torque requirements. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com...
  • Page 14 Make the connections according to the operating diagram. Check the absence of leakages from hydraulic connections. If necessary tighten the nuts of the pipe-fittings. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 15 If the earthing connection is not guaranteed trough mechanical parts where actuator is mounted, it is necessary ensure a directly earthing connection on provided point of actuator. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com...

  • Page 16: Disassembling

    + actuator assembly. Screw to be removed Fig. 4 – Disassembling of the actuator STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 17: Operation And Use

    Inform STI srl urgently if you face unsafe situations not described in this Instruction Manual. It is the sole responsibility of the operator to ensure that the local health and safety regulations are adhered...

  • Page 18: Reasonably Foreseeable Misuse

    8.6, are used as motive energy. (In this case it is recommended to refer to the material safety data sheet of the hydraulic fluid which is used). STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com...

  • Page 19: Instructions For The Operator

    Remove all rust and, in accordance with the applicable painting specifications, repair paint-coat that has been damaged during transport, storage or assembly. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 20: Stroke Adjustment (When Optional Travel Stops Are Provided)

    After stroke adjustment, operate the actuator with hydraulic supply to check that the actuator moves properly and that there are no leakages STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 21: Manual Override

    To restore the automatic function the selector lever must be rotated 90° clockwise towards the position identified by the label REMOTE. HAND PUMP (7) HAND PUMP (7) Fig. 6 – HP device STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 22 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. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 23: Maintenance

    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. 8.1 Periodic Inspections...

  • Page 24: Special Maintenance

    (21). 8.2.1.4 Replacement of stopper protection seals (when provided) Remove travel stop protection (22) and replace the seal (22a) if necessary. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 25 Release the pressure on the cylinder. 8.2.2.3 Replacement of stopper protection seals (when provided) Remove travel stop protection (22) and replace the seal (22a) if necessary. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 26: General Repairs

    Flash Point :>215°C (COC) (Based on synthetic oil) DIN 51 825: KP2K - 20 Dropping point :>260°C (ASTM D-566) Product code : 001A0065 Infosafe No.: ACISO GB/eng/C STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 27: Hydraulic Fluid

    Pour Point: < -39 °C Pour Point: < -60 °C Mass density at 15°C: 0,857 Kg/l Mass density at 15°C: 0,87 Kg/l STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 28: 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 5020, rev.03 07/2021 - SC/VHS...

  • Page 29: Parts List General Assembly

    Important: When ordering spare parts, please refer to the spare part kit on the attached drawings. Important: When ordering spare parts, use ONLY original STI spare parts. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 30: Cylinder Version With Spring Package

    (*) NBR standard material for temperature range from -20°C up to +100°C Fluorosilicon rubber or equivalent material for temperature range from -60°C up to +100°C. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 31 (*) NBR standard material for temperature range from -20°C up to +100°C Fluorosilicon rubber or equivalent material for temperature range from -60°C up to +100°C. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 32 (*) NBR standard material for temperature range from -20°C up to +100°C Fluorosilicon rubber or equivalent material for temperature range from -60°C up to +100°C. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 33 (*) NBR standard material for temperature range from -20°C up to +100°C Fluorosilicon rubber or equivalent material for temperature range from -60°C up to +100°C. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 34: Valve Adaptation Assembly (Optional)

    Screw Stainless steel (*) NBR standard material for temperature range from -20°C up to +100°C. (**) Quantity depends on the model. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...

  • Page 35: Stopper Protection Assembly For Cylinder (When Supplied)

    General references for the recommended spare parts are shown in the tables of Section 10. Individual kit, including all the recommended spares, can be ordered directly to STI srl provided that serial number of the actuator or specific purchasing order for the original actuator is indicated in the request.
  • Page 36 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 5020, rev.03 07/2021 - SC/VHS...
  • Page 37 This Declaration is available only for actuators placed on the market and/or put into service in the territory of the European Union. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 38 Every SC/V valve actuator is provided with a label contains the main operating conditions and serial number. The label may change if the SC/V valve actuator is sold with reference to a Certificate of product and/or system issued by Notified Body Exterior or Certificate of Conformity issued by STI S.r.l.. Labels for UK market are: Figure 1 –...
  • Page 39 It is forbidden to modify the information and the marks without previous written authorization by STI S.r.l.. Do not remove the label and/or replace with other label. STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 5020, rev.03 07/2021 - SC/VHS...
  • Page 40 STI S.r.l. Via Dei Caravaggi 15 24040 Levate (BG) Italy Tel. +39 035 2928.2 Fax +39 035 2928.247 www.imi-critical.com...

This manual is also suitable for:

Vhs series

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