BIFFI HLAS User manual

Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
February 2022
Bif HLAS
Single Acting Spring-Return Hydraulic Linear Actuator
Copyright © Bif. The information in this document is subject to change without notice. Updated data sheets can be obtained from our website www.bif.it or from your nearest Bif Center:
Bif Italia s.r.l. - Strada Bif 165, 29017 Fiorenzuola d'Arda (PC) – Italy PH: [phone] – bif_italia@bif.it

February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Revision Details
Revision Details
Revision Details
Rev. Date Description Prepared Checked Approved
5 February 2022 General update (Migration to new template)
4 February 2019 Updated data plate Sassi Oreci Vigliano
3April 2016 Updated applicable regulation (chapter 1.1.1) Ermanni Oreci Vigliano
2July 2012 General update Ermanni Stoto Vigliano
1 June 2010 General update Ermanni Stoto Vigliano
0May 1999 Document release Lazzarini Aliani Ziveri

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Table of ContentsInstallation, Operation and Maintenance Manual
MAN 620 Rev. 5 February 2022
Table of Contents
Table of Contents
Section 1: General Warnings
1.1 Generalities................................................................................................... 1
1.1.1 Applicable Regulation ........................................................................ 1
1.1.2 Terms and Conditions......................................................................... 1
1.2 Identication Plate ........................................................................................ 2
1.3 Introducing the Actuator............................................................................... 2
1.4 Data Sheet .................................................................................................... 3
Section 2: Installation
2.1 Checks upon Actuator Receipt.......................................................................... 4
2.2 Actuator Handling......................................................................................... 4
2.3 Storage ......................................................................................................... 6
2.4 Actuator Assembly on the Valve.................................................................... 6
2.4.1 Types of Assembly.............................................................................. 6
2.4.2 Assembly Procedure........................................................................... 6
2.5 Hydraulic Connections................................................................................ 10
2.6 Electrical Connections (If Any)..................................................................... 11
2.7 Commissioning........................................................................................... 11
Section 3: Operation and Use
3.1 Operation Description................................................................................. 12
3.2 Residual Risks.............................................................................................. 13
3.3 Operations.................................................................................................. 13
3.3.1 Emergency Manual Operation (MHP) ................................................13
3.3.2 Remote Control Operations ..............................................................14
3.4 Calibration of the Angular Stroke .................................................................15
3.5 Calibration of Microswitches (Bif Limit Switch Box Only)............................ 18
3.6 Calibration of the Operation Time .............................................................. 20
Section 4: Operational Tests and Inspections
Operational Tests and Inspections......................................................................... 21
Section 5: Maintenance
5.1 Periodic Maintenance ................................................................................. 22
5.1.1 Check and Restore Oil Level in the Manual Handpump ......................23
5.2 Extraordinary Maintenance ......................................................................... 25
5.2.1 Lubrication of Mechanism ................................................................ 25
5.2.2 Replacement of Cylinder Seals .......................................................... 26
5.3 Dismantling and Demolition ....................................................................... 29

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February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Table of Contents
Table of Contents
Section 6: Troubleshooting
6.1 Failure or Breakdown Research.................................................................... 30
Section 7: Layouts
7.1 Spare Parts Order........................................................................................ 31
7.2 Parts List for Maintenance and Replacing Procedure ....................................32
Section 8: Date Report for Maintenance Operations
Date Report for Maintenance Operations .............................................................. 38

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
General Warnings
Section 1: General Warnings
February 2022
Table of Contents
Section 1: General Warnings
NOTICE
The manual is an integral part of the machine, it should be carefully read before carrying
out any operation and it should be kept for future references.
1.1 Generalities
Bif Italia s.r.l. actuators are conceived, manufactured and controlled according to the
Quality Control System in compliance with EN-ISO 9001 international regulation.
1.1.1 Applicable Regulation
EN ISO 12100:2010: Safety of machinery – General principles for design – Risk
assessment and risk reduction
2006/42/EC: Machine directive
2014/68/EU: Directive for pressure PED equipment
2014/35/EU: Directive for low voltage equipment
2014/30/EU: Directive for the electromagnetic compatibility
2014/34/EU: Directive and safety instructions for use in hazardous area
NOTICE
Bif Italia s.r.l. pays the highest attention to collecting and verifying the documentation
contained in this Installation, Operation and Maintenance Manual. However, Bif Italia
s.r.l. is not liable for any mistakes contained in this manual and for damage or accidents
due to the use of the latter. The information contained is of exclusive reserved ownership
of Bif Italia s.r.l. and may be modied without prior notice. All rights reserved.
1.1.2 Terms and Conditions
Bif Italia s.r.l. guarantees that all the items produced are free of defects in workmanship
and manufacturing materials and meet relevant current specications, provided they
are installed, used and serviced according to the instructions contained in the present
manual. The warranty can last either one year from the date of installation by the initial
user of the product, or eighteen months from the date of shipment to the initial user,
depending on which event occurs rst. All detailed warranty conditions are specied in
the documentation forwarded together with the product. This warranty does not cover
special products or components not warranted by subcontractors, or materials that were
used or installed improperly or were modied or repaired by unauthorized staff. In the
event that a fault condition be caused by improper installation, maintenance or use, or by
irregular working conditions, the repairs will be charged according to applicable fees.
The warranty and Bif Italia s.r.l. liability shall lapse in the event that any
modication or tampering whatsoever be performed on the actuator.

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February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 1: General Warnings
General Warnings
1.2 Identication Plate
! WARNING
It is forbidden to modify the information and the marks without previous written
authorization by Bif Italia s.r.l.
The plate fastened on the actuator contains the following information (Figure1).
Figure 1 Data plate
1.3 Introducing the Actuator
HLAS single acting hydraulic linear actuators are suitable for the operation of linear
valves (wedge gate valves through conduit gate valves) for ON-OFF and modulating
heavy-duty service.
The actuator is made up of a hydraulic cylinder, a spring cartridge and a mounting pedestal
complete with a joint for the coupling to the valve stem of actuator output stem. The valve
is actuated in opening and in closing position by the actuator hydraulic cylinder in one
direction and by the spring unit in the other direction.
The output thrust of spring unit can be downward or upward according to valve operation
requirements (spring to open, spring to close, direct-acting valve, reverse-acting valve).
The spring-return pack incorporates up to four springs fully encapsulated in a
factory-welded cartridge; this assures safety conditions to personnel and simplies
the assembly.
The linear stroke of the valve is adjustable by means of the external mechanical stop for
upward position and by the adjustment of the coupling of valve stem to actuator joint for
the downward position.
The actuator pedestal has a ange with threaded holes to x the actuator to the valve.
Bif can supply different types of control system following customer’s requirements.
The expected lifetime of actuator is approximately 25 years.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
General Warnings General Warnings
Section 1: General Warnings
February 2022
Figure 2 Identication of actuator parts
Lifting eyelets
Hydraulic cylinder
Valve coupling
Spring cartridge
Manual handpump
MHP (optional)
Valve position
indicator
Spring-return actuator
Max. allowable thrust (N)
HLAS 250 k 135 100 k 300 CL MHP
Cylinder diameter (mm)
Stroke (mm)
Spring action
Manual override
Spring ending thrust (N)
1.4 Data Sheet
Supply uid Mineral oil or synthetic uids
Operating temperature Standard: from –30 °C to +100 °C
Optional: from –60 °C to +140 °C
Applications Gate, Globe valves

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February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
Section 2: Installation
2.1 Checks upon Actuator Receipt
• Check that the model, the serial number of the actuator and the technical
data reported on the identication plate correspond with those of order
conrmation (Section 1.2).
• Check that the actuator is equipped with the ttings as provided for by
order conrmation.
• Check that the actuator was not damaged during transportation; if necessary,
renovate the painting according to the specication reported on the
order conrmation.
• If the actuator is received already assembled with the valve, its settings have
already been made at the factory.
• If the actuator is delivered separately from the valve, it is necessary to check, and,
if required, to adjust, the settings of the mechanical stops (Section 3.4) and of
microswitches (if any) (Section 3.5).
2.2 Actuator Handling
NOTICE
The lifting and handling should be made by qualied staff and in compliance with the laws and
provisions in force.
! WARNING
The fastening points are appropriate for the lifting of the actuator alone and not for the
valve + actuator assembly. Avoid that during the handling, the actuator passes above
the staff. The actuator should be handled with appropriate lifting means. The weight of the
actuator is reported on the delivery bill.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
February 2022
Figure 3 Lifting points for HLAS actuators
1 = Lifting points (obligatory)
Figure 4 Positioning by chains
1 = point of support
! WARNING
2 = don’t lay the actuator on tie rods of cylinder
3 = don’t lay the actuator on accessories (manual handpump, hydraulic control system, etc.)

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February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
2.3 Storage
If the actuator needs storage before installation, follow these steps:
• Place it on a wood surface in order not to deteriorate the area of valve coupling.
• Make sure that plastic plugs are present on the hydraulic and electrical
connections (if present).
• Check that the cover of the control group and of the limit switch box (if any) are
properly closed.
If the storage is long-term or outdoor:
• Keep the actuator protected from direct weather conditions.
• Replace plastic plugs of hydraulic and electrical connections (if any) with metal
plugs that guarantee perfect tightness.
• Coat the valve coupling area with oil, grease or protection disc.
• Periodically operate the actuator (Section 3.3).
2.4 Actuator Assembly on the Valve
2.4.1 Types of Assembly
The adapter pedestal in fabricated carbon steel is specically designed for adaptation to
any type of valve with provision for local indicator, limit switches and other accessories
(on request).
Lift the actuator by safety hook for chains using the lifting points (see Section 2.2) on
the top of actuator for handling, transporting and assembling in vertical position (see
Figure 3). For handling, transporting and assembling the actuator in horizontal position
by safety hook for chains, use the lifting points on the top of cylinder head ange and on
coupling ange (see Figure 4).
2.4.2 Assembly Procedure
! WARNING
Failure to comply with the following procedures may impair product warranty. Installation,
commissioning and maintenance and repair works should be carried out by qualied staff.
A non-conforming assembly could be the source of serious accidents.
For actuator assembly on the valve:
NOTICE
Check that the assembly position, as shown on the documentation, complies with
system’s geometry. Check the consistency of the parts of actuator-valve coupling.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
February 2022
A. To assemble the actuator onto the valve by bracket with threaded joint,
proceed as follows:
Figure 5 Pedestal with threaded coupling joint
Table 1. Parts list
Item Description
1Nut
2Stud bolt
3Support joint
4Index
5Screw
6Connecting joint
7Screw
8Bushing
9Flange
1. Check that the coupling dimensions of the valve ange and stem, or of the
relevant extension, meet the actuator coupling dimensions (valve stem and
ange). Lubricate the valve stem with grease in order to make the assembly easier.
2. Connect a sling to the support point of the actuator and lift it. To make the
assembly easier, the valve stem has to be in perfect vertical position.
3. Screw the actuator coupling joint onto the valve by rotating the actuator or screw
down the valve stem stroke ring with Red Loctite 542 and x the half bearings.
When the threaded holes of the actuator ange are in correspondence with the
holes on the valve ange, screw the proper stud bolts. Screw the nuts on the stud
bolts and tighten up the valve ange that is in contact with the actuator ange.
4. Tighten the nuts of the connecting stud bolts evenly with the torque prescribed in
the table. The stud bolts must be made of ASTM A320 L7 steel, the nuts must be
made of ASTM A194 grade 2 steel as minimum.
NOTICE
The eyebolt is sized for the lifting of the actuator only (NOT ACTUATOR+VALVE). Proper
lifting points have to be foreseen for the valve.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
B. To assemble the actuator onto the valve by bracket with shell joint, perform the
following operations:
Figure 6 Pedestal with shell coupling joint
Item Description
1Stud bolt
2Nut
3Nut
4Screw
5Pedestal
6Actuator joint
7Stem valve joint
8Shell joint
9Spacer
10 Screw
Table 2. Parts list

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
February 2022
1. Check that the coupling dimensions of the valve ange and stem, or of the
relevant extension, meet the actuator coupling dimensions (valve stem and
ange). Lubricate the valve stem with grease in order to make the assembly easier.
2. To make the assembly easier, the valve stem has to be in perfect vertical position.
3. Disassemble the two halves of actuator pedestal shell joint (item 8) by unscrewing
the retaining screws (item 4), therefore, disassemble the valve stem joint (item 7).
4. Lift the actuator by utilizing the proper lifting eyelets and unscrew the nuts and
the stud bolts from the actuator pedestal.
5. Assemble the actuator onto the valve and arrange it in its correct vertical position
proper to connection between valve stem and actuator cylinder rod.
6. Screw the valve stem joint (item 7) on valve stem up to reach the proper position
which allows the reassembly of the two halves of shell joint (item 8), tighten the
joint fastening screws (item 4).
7. Screw the stud bolts (item 1) into the actuator pedestal ange and screw the nuts
on the stud bolts.
8. Tighten according to the nut (item 2) size torque requirements.
Threading Tightening torque (Nm)
M8 20
M10 40
M12 70
M14 110
M16 160
M20 320
M22 420
M24 550
M27 800
M30 1100
M33 1400
M36 1700
Table 3. Nuts tightening torque
The screwing values in Table 3 were calculated considering the materials ASTM A320 L7 for
screws or tie rods and ASTM A194 gr. 2H for the nuts.
To operate, refer to following table:

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February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
2.5 Hydraulic Connections
! WARNING
Check that the values of hydraulic supply available are compatible with those reported on
the identication plate of the actuator.
NOTICE
The connections should be made by qualied staff.
Use pipes and connections appropriate as for type, material and dimensions.
! WARNING
Use motor uid with purity degree ISO 4406 17/14 or NAS 1638 Class 8 (AS4059 Class
4B-F). For special applications, the lower contamination degree is required. Please refer to
the documentation supplied.
• Properly deburr the ends of rigid pipes.
• Properly clean the interior of pipes, sending through them plenty of the supply
uid used in the system.
• Mold and fasten the connection pipes so that no irregular strains at entries or
loosening of threaded connections occur.
• Make the connections according to the operating diagram.
• Check the absence of leakages from hydraulic connections. If necessary, tighten
the nuts of the pipe-ttings.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 2: Installation
Installation
February 2022
2.6 Electrical Connections (if Any)
! WARNING
Use components appropriate as for type, material and dimensions.
The connections should be made by qualied staff.
Before carrying out any operation, cut line power off.
Safety provisions as per CEI 64-8 regulation should be complied with (same as IEC 60364).
Remove plastic plugs from cables entries.
• Screw the cable glands rmly.
• Introduce connection cables.
• Make the connections in compliance with applicable wiring diagrams on the
documentation supplied.
• Screw the cable gland.
• Replace the plastic plugs of unused entries with metal plugs.
2.7 Commissioning
Upon actuator commissioning, please carry out the following checks:
• Check that paint is not damaged during transport. If necessary, repair the
damages to paint coat.
• Check that the values of hydraulic supply available in the system are compatible
with those reported on the identication plate of the actuator (Figure 1) and on
the documentation supplied.
• Check that the feed voltage values of the electric components (solenoid valve
coils, microswitches, pressure switches, etc.) are compatible with those reported
on the identication plate of the actuator (Figure 1).
• Check that the setting of the components of the actuator control unit
(pressure regulator, pressure switches, ow control valves, etc.) meet the
plant requirements.
• Carry out all kinds of operations and check their proper execution (Section 3.3).
• Check the absence of leakages in the hydraulic connections. If necessary, tighten
the nuts of the pipe-ttings.
• Check proper operation of all the due signalling (valve position, hydraulic supply
pressure, etc.).
• Make a complete functional test in order to verify all the operations are executed
according to operating schematic diagram supplied.
! WARNING
Installation, commissioning and maintenance and repair works should be made by
qualied staff.

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February 2022
Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 3: Operation and Use
Operation and Use
Section 3: Operation and Use
3.1 Operation Description
The supply uid pressurizes the hydraulic cylinder chamber relevant to the operation to
carry out (opening or closing) (see following pages).
This pressure starts the linear motion of the piston and the consequent motion of the valve
stem that is coupled.
The spring action operates the valve stem in the opposite direction (fail-safe position).
Figure 7
Hydraulic supply connection
For local or remote operations, please refer to technical documentation furnished
with actuators.
The power and control systems are supplied on specic customer demand.
NOTICE
For all the relevant information, please refer to the specic documentation supplied.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 3: Operation and Use
Operation and Use
February 2022
Figure 8 Single acting function with jackscrew manual override MHP
3.2 Residual Risks
! WARNING
The actuator has parts under pressure.
Use due caution.
Use individual protections provided for by the laws and provisions in force.
3.3 Operations
(refer to specic document: operating diagram furnished)
3.3.1 Emergency Manual Operation (MHP)
! WARNING
Refer to applicable control schematic in supplied documentation.
The HLAS actuators can have an emergency manual override in addition to the local
and/or remote control system, which controls the oil supplied by a power pack for the
“normal” actuator operation.
The emergency manual override mounted on the actuator consists of a hydraulic manual
override and a hydraulic manual selector to choose the actuator “Normal operation” with
oil supply from a power pack, or the “Emergency manual operation”. For nominal pressure
until 105 bar, the manual override is similar to Section 7.2, Figure 21. For nominal pressure
upper to 105 bar, the manual override will be OMFB for carbon steel material or dedicated
model engineered by Bif for stainless steel material.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 3: Operation and Use
Operation and Use
3.3.2 Remote Control Operations
Figure 9 Example of control schematics for spring-to-close HLAS actuator
Electric connection to
microswitches PCS/PSD
Connection at
customer care
Oil supply line
Oil return line
Electric remote control to open
Energize permanently the solenoid
valve 424B.
The opening time is adjustable by the
ow regulator 530A.
Electric remote control to close
De-energize the solenoid valve 424B.
The closing time is adjustable by the ow
regulator 530B.
1 Single acting spring-return hydraulic
linear actuator
41 Electric microswitches
302 Panel
351 Stop valve - lockable
353 Needle valve with drain valve
358 Hydraulic lter with visual indicator
A - Filter
B - Clogging visual indicator
424 3/2 N.C. Poppet type solenoid valve
A - 3/2 N.C. Hydraulic pilot/spring
return valve
B - 3/2 N.C. Poppet type solenoid valve
530 Undirectional ow regulator
(adjustable setting)
621 Pressure gauge
NOTE:
The diagram is drawn with solenoid valve coil not energized.

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 3: Operation and Use
Operation and Use
February 2022
1 Single acting spring-return hydraulic
linear actuator
41 Electric microswitches
302 Panel
351 Stop valve - lockable
353 Needle valve with drain valve
358 Hydraulic lter with visual indicator
A - Filter
B - Clogging visual indicator
424 3/2 N.C. Poppet type solenoid valve
A - 3/2 N.C. Hydraulic pilot/spring
return valve
B - 3/2 N.C. Poppet type solenoid valve
530 Undirectional ow regulator
(adjustable setting)
621 Pressure gauge
3.4. Calibration of the Angular Stroke
It is important that the mechanical stops of the actuator (and not those of the valve) stop
the linear stroke at both extreme valve position (fully open and fully closed), except when
this is required by the valve operation.
The setting of the open/closed valve position (upward position) is performed by adjusting
the travel stop screw into the end ange of the hydraulic cylinder and by the adjustment of
the coupling of valve stem to actuator joint for the downward position.
Figure 10 Mechanical stop on cylinder end ange

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Installation, Operation and Maintenance Manual
MAN 620 Rev. 5
Section 3: Operation and Use
Operation and Use
For the adjustment of the mechanical stop on the end ange of cylinder, follow these
steps (Figure 11):
• Remove the plug (t) with the specic wrench (c1).
• Insert a wrench for Allen keys (c2) in the through hole until reaching the
adjustment pin (g).
• Keep the protection cover blocked with the special wrench (c3).
• If the actuator angular stroke is stopped before reaching the upward position (fully
open or closed), unscrew the adjusting screw by turning it anticlockwise with a
proper wrench, until the valve reaches the right position.
• If the actuator angular stroke is stopped beyond the upward position (fully open or
closed valve), screw the stop screw by turning it clockwise until the valve reaches
the right position.
• When the adjustment is over, tighten the plug (t).
Figure 11 Mechanical stop of the cylinder
Table 4.
Hydraulic Cylinder Size Wrench C1 (mm) Wr e n c h C 2 ( m m ) Wrench C3 (mm)
075 22 10 36
100 22 10 36
135 22 10 36
175 22 14 46
200 27 14 46
235 27 17 65
280 27 17 65
300 36 17 110