ISO 3320 Hydraulic cylinders SL 250 – SL 350 Series · 2017-08-06 · Stocchetta Cilindri S.r.l. – Via Capretti n°14 , 25136 Brescia – Italia – ISO 3320 Hydraulic cylinders

Stocchetta Cilindri S.r.l. – Via Capretti n°14 , 25136 Brescia – Italia –

ISO 3320 Hydraulic cylinders

SL 250 – SL 350 Series Use and maintenance manual APP 0005-4.2014 REV.00

Revisione Data Emissione Modifiche

00 01/01/2015 PRIMA EMISSIONE

APP 0005-4.2014 SL SERIES – USE AND MAINTENANCE MANUAL

Stocchetta Cilindri S.r.l. – Via Capretti n°14 , 25136 Brescia – Italy –

Table of matters

1 Product information

1.1 Description

1.2 Technical specifications

1.3 General product description

2 Use of manual

2.1 Safety symbols

2.2 General information

3 Decommissioning

3.1 Preparation to decommissioning

3.2 How to carry out the decommissioning

3.3 Disassembly preliminary operations

4 Repair and spare parts

4.1 Repair

4.2 Spare parts

5 Maintenance/ replacement of parts subject to wear

5.1 Maintenance of cushioning adjustment cartridges

5.2 Replacement of seals of the rod guide bushing

5.3 Replacement of piston seals

5.4 Inductive proximity switches installation and calibration



1

1 Product information

1.1 Description

A hydraulic cylinder converts hydraulic energy into a linear movement. The driving force is

determined by the hydraulic pressure inside the cylinder chamber on the piston surfaces and

cylinder ring.

Fig.1 Cylinder SL main components:

1 Rod

2 Flange

3 Oil connections

4 Cylinder front head

5 Threaded flanges

6 Cylinder barrel

7 Cylinder end cap (or cylinder

rear head)

The Stocchetta Cilindri SL 250 and SL 350 series of hydraulic double acting cylinders and servo-

cylinders has been conceived to meet the most demanding requirements for heavy duty uses in the

iron and steel sector, in compliance with ISO 3320 and DIN 24334 construction standards.

The round-headed design and the careful choice of materials and seals used, added to the rigorous

final testing procedures reproducing normal cylinder operating conditions, make these hydraulic

actuators the peak of technology in the hydraulic actuation field for all types of industrial

applications, particularly under critical operating conditions such as those in steel plants where sturdy,

reliable and easy-to-maintain products are required.

1 3 2 7 5 7 6 2 4



2

1.2 Technical specifications

Interchangeability

dimensions In compliance with ISO 3320 and DIN 24334 standards

Nominal operating

pressure (non-stop

operation)

SERIES SL 250: 250 bar (25 MPa)

SERIES SL 350: 350 bar (35 MPa)

Rod diameters Depending on bore type, 2 diameters are available from 20 mm

to 220 mm.

Stroke

Upon customer’s request, with dimensional tolerances as

follows:

0-500 +/- 1.5

501-1250 +/- 2

1251-3000 +/- 3

3001-8000 +/- 5

Max. standard speed 0.5 m/s

Standard temperature From -20°C to +100°C

Standard hydraulic fluid Mineral oil. Alternatively, HFC, HFD, HFA

Mounting pieces and

accessories

Interchangeable dimensions and mounting pieces with:

series CD 250 and DIN 200/250;

series CD 350 and DIN 350;

completed by a wide range of accessories to satisfy any kind of

operative requirements.



3

1.3 General product description

Fig. 2

The rod (A) has been obtained from bars of hardened and tempered, high-strength, thick

chrome-plated alloy steel and honed with roughness Ra=0.2 µm

The front and rear pistons (P) with packing seals are made of alloy steel and ensure highest

reliability also in heavy-duty conditions. The standard configuration foresees two pistons

separated by a bronze guide slewing ring (E) and equipped with packing seals (D). Upon

request, also a Low Friction configuration (see Fig. 3) is available.

Fig. 3 – Low friction layout

1 GLYD RING seals

2 Guide rings

3 Enbloc piston



4

The cylinder head (T), made of high-strength steel, is precision-machined to ensure perfect

alignment between the surfaces and also perfect concentricity of the seat of the rod guide

bushing with cylinder axis. The hydraulic circuit connection has been positioned on the head,

which is bolted to the barrel by means of the threaded flange (G) and, upon request, vents

and braking valves are also available.

Tightening torques of the screws used to lock the head in place are given in the following

tables:

TIGHTENING TORQUES TABLE FOR SL 250 CYLINDERS

Bore 40 50 63 80 100 125 140 160 180 200 220 250 280 320

Screws M 8 M 10 M 12 M 12 M 16 M 20 M 20 M 27 M 27 M 30 M 33 M 36 M 39 M 42

Torque (Nm) 30 58 100 100 180 350 350 850 850 1300 1800 2500 3300 4000


Bore 40 50 63 80 100 125 140 160 180 200 220 250 280 320

Screws M 8 M 10 M 12 M 12 M 16 M 20 M 20 M 27 M 27 M 30 M 33 M 36 M 39 M 42

Torque (Nm) 30 58 100 100 180 350 350 850 850 1300 1800 2500 3300 4000

Tab. 1

The barrel (E), has been obtained from a large thickness, seamless tube made of high-strength

steel; it is internally lapped to improve sliding and to ensure long life to seals. The barrel has

been dimensioned on account of the regulations in force and, therefore, the required nominal

pressures. The dimensioning is such that the bulking of the barrel, due to internal pressure,

remains within the limits ensuring the proper working of piston seals and guide rings. Upon

request, it can be internally chrome-plated.

The end cap (F), is precision machined to guarantee perfect alignment between the surfaces

and perfect concentricity. A connection to the hydraulic circuit is located on the end cap and,

upon request, vents and braking valves are also available. The end cap is bolted to the barrel

by means of the relevant threaded flange (G).



5

The rod guide bushing (B) is made of high wear-resistant bronze. The surface of the guide

bushing supports the rod when it slides. Bushing configuration, provided with seals, can be:

- DIAMETERS 40 – 50: threaded and screwed in the cylinder head;

- DIAMETERS 63 – 80 – 100 – 125 – 140 SMALL ROD: fitted in a precision seat and locked by

an easy-to-disassemble front flange (N), bolted to the cylinder head;

- DIAMETERS 63 – 80 – 100 – 125 – 140 LARGE ROD: threaded and screwed in the cylinder

head;

- DIAMETERS EXCEEDING 160 WITH ANY KIND OF ROD: fitted in a precision seat and locked

by an easy-to-disassemble front flange (N), bolted to the cylinder head.

The table below illustrates the tightening torques relevant to the clamping screws of the front

flange:


Bore 63* 80* 100* 125* 140* 160 180 200 220 250 280 320

Screws M 6 M 8 M 8 M 10 M 10 M 12 M 14 M 14 M 16 M 18 M 18 M 18

Torque (Nm) 6 30 30 58 58 100 160 160 250 340 340 340


Bore 63* 80* 100* 125* 140* 160 180 200 220 250 280 320

Screws M 6 M 8 M 8 M 10 M 10 M 12 M 14 M 14 M 16 M 18 M 18 M 18

Torque (Nm) 6 30 30 58 58 100 160 160 250 340 340 340

Tab. 2 * Only for small rod.

The scraper (R) is positioned in the flange thus ensuring the cleaning of the rod when it

retracts.

A Low Friction configuration (see fig. 4) is possible also for the rod guide bushing.

Fig. 4 – Bushing – low friction configuration

1. Front flange

2. STEPSEAL seals

3. Rod guide bushing

4. Head



6

The seals must be chosen according to the operating conditions of the system: speed,

frequency, kind of fluid and temperature. Cylinder seals are, primarily:

- Static (S), used between two non-moving parts. For instance, the seals between head (or

end cap) and barrel or between rod and piston.

- Dynamic (D), used between moving parts. For instance, the seals between rod and bushing

or between piston and barrel.

- Guide rings, they ensure the correct sliding between piston and barrel.

The seals must be replaced at regular intervals.

The kits fitted to the cylinder (and for possible replacement) are: standard, high temperatures

or aggressive fluids, water glycol, low friction.

The front and rear cushioning is gradual action and has been realized by means of cushion

rings with special profile for gradual cushioning and absence of pressure peaks.

Upon request, air vents can be installed on the heads; they enable air bleeding which forms

upon start-up, when the entire cylinder stroke is not exploited or when the fitting connections

are not facing upwards.

The spacers, suggested for strokes exceeding 1000 mm, increase the rod and piston guide,

thus avoiding overloads and early wearing.



7

2 Use of manual

This use and maintenance manual describes the cylinder ISO 3320, its components and its

relevant operations. Before starting any operation implying use, general maintenance of the

cylinder (see chapter no. 11 of basic manual STC001-2.2013), handling and storage (see

chapters no. 6 and 7 of basic manual STC001-2.2013), read this manual and basic manual

STC001-2.2013 carefully.

The handbook contains 34 pages.

2.1 Safety symbols

DANGER

Identifies a dangerous situation which, if not avoided,

may cause death or serious body injuries.

CAUTION

Identifies a dangerous situation which, if not avoided,

may cause slight up to medium-serious body injuries

NOTICE

Information which, if used, protects the product

and/or the environment from material damages.

IMPORTANT

Instructions for a better use of the cylinder when in

operation or adjustment and/or maintenance

instructions.

GLOVES The use of protective gloves is compulsory

LUBRICATION Proper lubrication of the components

MAINTENANCE

Instructions for a correct disassembly/re-assembly of

cylinder components during routine and/or

extraordinary maintenance.



8

2.2 General information

The original cylinder configuration shall not be modified for any reason whatever without the

explicit consent of Stocchetta Cilindri S.r.l. .

Before starting any operation, carefully read all the directions stated in the chapter “Safety

warnings” of the basic manual STC001-2.2013.

The opening of the hydraulic cylinder will result in the cancellation of any warranty right.

This manual and the information therein contained have been conceived for skilled technical

staff. Stocchetta Cilindri S.r.l. disclaims all liability for damages due to misuse of the

information contained in this manual. The content of this manual can be modified without any

notice. Due to technological developments, the illustrations and descriptions contained in this

manual may differ, in the details, from the actually supplied cylinder. In case of problems or

for any information, contact the after-sales service.

Upon goods receipt verify that:

• The packaging is unimpaired and not damaged. In case of damages

immediately inform Stocchetta Cilindri S.r.l.

• The supply corresponds to order specifications



9

3 Decommissioning

3.1 Preparation to decommissioning

DANGER

HIGH OPERATING PRESSURE IN THE HYDRAULIC CYLINDER AND IN THE SYSTEM

Danger of injuries or damages to things due to mobile parts or oil leakage during operation!

• Disable all power transmission components and all the connections (electrical,

pneumatic, hydraulic) according to the manufacturer’s indications; secure the

installation against restart and, if possible, remove the main safety element of

the installation

• Release the cylinder from external forces, if any

• Depressurize the accumulators on the oil side - if any

Upon decommissioning and disassembly of the hydraulic cylinder from the system, do as

follows:

• Due to safety reasons, lines, ports and components cannot be

disconnected as long as the system is under pressure. First of all

lower the loads, depressurize the pressure accumulator, switch off

the pumps and ensure the system against re-start

• Provide for sufficiently capacious collection tanks to contain the

whole oil volume

3.2 How to carry out the decommissioning

In order to carry out the decommissioning follow these steps:

• Let the oil flow into the prearranged collection tanks

• Verify that all lines and services are completely empty

• Carry out venting, if necessary



10

3.3 Disassembly preliminary operations

Before carrying out any operation on the hydraulic cylinder, take the following measures:

• Get a sufficiently intelligible installation layout and/or list of the spare

parts

• Make use of clean and professional tools. Make sure that the

workstation is clean

• Upon cylinder disassembly, avoid any penetration of impurities inside

of it. Seal the ports with suitable plugs or flanged covers

• Make sure that the cylinder and, in particular, the rod are not

damaged

• Position the hydraulic cylinder and its components on a stable

working table

As concerns cylinder lifting and handling during its disassembly from the system (or

machinery), the same directions set forth in chapter 6 “Handling” of the basic manual

STC0001-2.2013 shall apply.



11

4 Repair and spare parts

Please always report to the personnel of Stocchetta Cilindri S.r.l. for any question or

explanation you may need.

The opening of the hydraulic cylinder will result in the cancellation of any warranty right.

4.1 Repair

Stocchetta Cilindri S.r.l. offers complete assistance for hydraulic cylinder repairs. Submit your

requests to our headquarters to the following e-mail address: [email protected]

4.2 Spare parts

NOTICE

MACHINE MALFUNCTION DUE TO THE USE OF UNSUITABLE SPARE PARTS!

Damages to property!

• Exclusively use components listed in the specific product documentation (list

of components)

• Exclusively use new seals and verify their compatibility with the fluid used.

Despite their identical aspect, seal materials may differ; therefore check the

product code

Send spare parts orders directly to headquarters to the e-mail address:

[email protected]

When ordering the spare parts, provide the product code and the cylinder work-order no.

stated on the identification plate. Besides specify, if known, the position of the corresponding

component according to the list of components.



12

5 Maintenance/ replacement of parts subject to wear

5.1 Maintenance of cushioning adjustment cartridges

Series SL cylinders are provided with a cushioning adjuster with needle valve. If the

adjustment cartridge leaks, this means that the seals must be replaced.

Fig. 5 – Layout cushioning adjuster

1 Needle

2 Lower nut

3 Cartridge

4 Bonded seal

5 O-ring

6 Back-up ring

Disassembly: Unscrew the complete valve by making use of the suitable wrench. Thoroughly

clean the seat of the bonded seal and pay utmost care that no dirt or foreign bodies enter the

cylinder through the seat of the adjustment needle valve. Firstly unscrew the locking nut and

then the needle of the cartridge by pulling it out from the bottom.

Assembly: replace the O-ring and the back-up ring (Pos. 6), re-position the needle (Pos.1) in

the cartridge (Pos.3) and partially screw the lower nut (Pos. 2). Insert the new bonded seal

(Pos. 4) into the threaded section of the cartridge and screw tight the complete valve in its

seat. Adjust braking again, as set forth in paragraph 3.9 of basic manual STC 0001-2.2013 and

lock the nut in position. In case of leakage from the bonded seal, increase the tightening

torque.



13

5.2 Replacement of seals of the rod guide bushing

� Configuration with seals, CHEVRON type;

� Threaded bushing (diam. 40-50) (diam. 63-80-100-125-140 only big-sized rod);

Fig.6

Tab. 3

Pos. No. Description

A 1 Scraper

B 1 Seal, CHEVRON type

C 1+1 O-ring – Backup ring



14

Check that the surface of the rod is free from damages that may affect the service life of the

seals.

Unscrew the guide bushing by making use of the four holes for hook-wrench operation and

pull it out, being careful not to damage the rod

After having removed the worn out seals, carry out a thorough washing of all parts in order

that they are clean and check that they are free from metallic particles, scorings or surface

faults of any kind; otherwise, provide also for the replacement of the damaged component. If

necessary, ask Stocchetta Cilindri S.r.l. for components kit – in case of seals and bushing – or

the necessary spare parts.

Lubricate the new seals to be fitted and their seats in the bushing by making use of specific

grease type Polymer 400\0 (to be supplied upon request). The specific feature of grease is to

improve the sensitivity, accuracy, tightness and service life of the seals, thus avoiding sticking

and jerky movements (stick-slip effect), besides facilitating the motions at low speeds by

decreasing the frictions.

Check the correct orientation of the seals with respect to the thrust direction of the hydraulic

fluid as illustrated in the following figure (see Fig. 7).

Fig. 7



15

Insert the packing seal into the seat. Assemble the guide bushing, being careful not to damage

the rod and screw it until its limit stop by making use of the four holes for wrench operation.



16


� Bolted flange (diam. 63-80-100-125-140 only small-sized rod) (diam. exceeding 140);

Fig. 8

Tab. 4


A 1 Scraper

B 1 Seal, CHEVRON type




17


seals.

Unscrew the clamping screws of the front flange and pull it off, being careful not to damage

the rod. Pull out the rod guide bushing.

After having removed the worn-out seals, carry out a thorough washing of all parts in order



necessary, ask Stocchetta Cilindri S.r.l. for components kit – in case of seals and bushing – or

the necessary spare parts.








Fig. 9



18

Insert the packing seal into the seat and insert the rod guide bushing. Mount the front flange

being careful not to damage the rod and clamp it by tightening the corresponding screws with

suitable torque (see table Tab. 2 at page 5).



19

� Low friction configuration;

� Threaded bushing (diam. 40-50) (diam. 63-80-100-125-140 only big-sized rod);

Fig. 10

Tab. 5


A 1 Scraper

B1 2 STEPSEAL gasket

B2 1 O-ring




20


seals.

Unscrew the rod guide bushing by making use of the four holes for pin wrench operation and

pull it out being careful not to damage the rod.




necessary, ask Stocchetta Cilindri S.r.l. for components kit – in case of seals and bushing –

(see notes at the end of paragraph) or the necessary spare parts.








Fig. 11



21

Install the seals in the bushing by operating evenly and avoiding any use of metallic, sharp-

edged tools, being extremely careful not to cause any long-term deformation to the seals.

Position the O-ring, if any, into the groove.

Insert the seal into the groove by pressing it together by hand as illustrated in Fig. 12 or by

making use of special tools as illustrated in Fig. 13. The seal shall be given a “kidney” shape

and shall be free from any edges in its bends.

Fig. 12 Fig. 13

Once the seal has been positioned into the groove, shape it into a ring, by hand and by

pushing in the direction of the arrow (see Fig. 12).

Calibrate the seal directly on the rod only if the latter is provided with a lead-in chamfer.

Otherwise, calibrated gauges may also be used, provided they have a specific chamfer (see Fig.

14).

Fig. 14



22

Upon bushing installation, be extremely careful not to damage the newly fitted seals upon

contact with rod thread. Carry out a rotary movement in order to facilitate the coupling of the

rod guide bushing.

Make the bushing slide along the rod and screw it down in the head until its limit-stop, by

making use of the 4 holes for pin wrench operation.



23


� Bolted bushing (diam. 63-80-100-125-140 only small-sized rod) (diameters exceeding 140);

Fig. 15

Tab. 6


A 1 Scraper

B1 2 STEPSEAL gaskets

B2 1 O-ring




24


seals.

Unscrew the clamping screws of the front flange and pull it off, being careful not to damage

the rod. Pull out the rod guide bushing.




necessary, ask Stocchetta Cilindri S.r.l. for components kit – in case of seals and bushing –

(see notes at the end of paragraph) or the necessary spare parts.








Fig. 16



25

Install the seals in the bushing by operating evenly and avoiding any use of metallic, sharp-


Position the O-ring, if any, into the groove.

Insert the seal into the groove by pressing it together by hand, as illustrated in Fig. 17, or by

making use of special tools as illustrated in Fig. 18. The seal shall be given a “kidney” shape

and shall be free from any edges in its bends.

Fig. 17 Fig. 18

Once the seal has been positioned into the groove, shape it into a ring by hand and by pushing

in the direction of the arrow (see Fig. 17).

Calibrate the seal directly on the rod only if the latter is provided with a lead-in chamfer.

Otherwise, calibrated gauges may also be used, provided they have a specific chamfer (see Fig.

19).

Fig. 19



26

Upon bushing installation, be extremely careful not to damage the newly fitted seals in contact

with rod thread. Carry out a rotary movement in order to facilitate the coupling of the rod

guide bushing.

Make the bushing slide along the rod and position it into the head seat. Clamp the front flange

by tightening the screws with suitable torque (see the table Tab. 2 at page 5).



27

5.3 Replacement of piston seals


Fig. 20

Tab. 6

Hereunder a list of directives to be observed for a correct replacement of piston seals. Use the

drawing of Fig. 20 as reference.


D 2 O-ring

E 2 Packing seal for piston sealing

F 1 O-ring

G 1 Stop dowel



28

Remove the screws that fix the head to the threaded flange of the barrel. Pull off the front

flange, rod guide bushing and head, when they are still assembled, being careful not to

damage the rod. Pull off the rod-piston assembly. Remove the stop Seeger ring, unscrew the

locking dowel of the cushion ring and draw it off. Draw off the pistons and the slewing ring.

Be extremely careful not to damage the seals of the bushing due to possible contact with the

thread at rod end.

After having removed the worn-out seals, carry out a thorough washing of all parts with

accurate examination of the barrel, rod and piston in order to ascertain that no scorings, burrs

or any other kind of damages have been caused to the surface. In case of damage, ask

Stocchetta Cilindri S.r.l. for spare parts in order to provide for the replacement.

If the cylinder is provided with cushioning, check - after having disassembled the rod-piston

unit from the cylinder body – that the cushioning components are not damaged or worn out.








Fig.21



29

Fit the new packing seals in the seats resulting from the coupling of front and rear pistons,

and the guide slewing ring. Replace also the sealing O-rings between the pistons and the rod.

Re-assemble the pistons, the slewing ring and the cushion ring. Block the stop dowel of the

spinner, by making use of LOCTITE 270, and the stop Seeger ring. Re-assemble the rod-piston

assembly. Re-assemble the front flange, rod guide bushing and cylinder barrel assembly being

careful not to damage the rod or the seals positioned in the assembled unit. Tighten the

screws that clamp the head to the threaded flange of the barrel. Tighten the screws crosswise

by applying a gradual tightening torque up to the maximum value stated in Table 1 at page 4.



30


Fig. 22

Tab. 7

Hereunder a list of directives to be observed for a correct replacement of piston seals. Use the

drawing of Fig. 22 as reference.


E1 1 GLYD RING seal

E2 3 Guide rings

F 1 O-ring

G 1 Stop dowel



31

Remove the screws that clamp the head to the ring nut of the barrel. Pull off the rod guide

bushing and the head when they are still assembled, being careful not to damage the rod. Pull

off the rod-piston unit.

Be extremely careful not to damage the seals of the bushing due to possible contact with the

thread at rod end.

After having removed the worn-out seals, carry out a thorough washing of all parts with

accurate examination of the barrel, rod and piston in order to ascertain that no scorings, burrs

or any other kind of damages have been caused to the surface. In case of damage, ask

Stocchetta Cilindri S.r.l. for spare parts in order to provide for the replacement.

If the cylinder is provided with cushioning, check - after having disassembled the rod-piston

unit from the cylinder body – that the cushioning components are not damaged or worn out.




and jerky motions (stick-slip effect), besides facilitating the motions at low speeds by




SEAL RING Fig. 23



32

Install the seals of the piston by operating evenly and avoiding any use of metallic, sharp-


Position the O-ring in its seat by expanding it as much as necessary. Place the sealing ring into

the groove, over the O-ring (see Fig. 24) and enlarge it by hand until it correctly fits (see Fig.

25).

Fig. 24 Fig. 25

The same operation can be carried out by means of a special device consisting of an expansion

cone and an expanding sleeve (see Fig. 26).

Fig. 26



33

The seal can be calibrated by making use of the corresponding cylinder barrel, on condition

that it is provided with a suitably long lead-in chamfer, or by means of a calibrating tool (see

Fig. 27).

Fig. 27

Lubricate the cylinder barrel with oil, then insert the rod/piston unit.

Insert the assembled rod-piston unit into the barrel and push until it reaches the end stop.

Reassemble the bushing-head unit and fix it, by making use of suitable screws, to the ring nut

of the barrel. Tighten the screws crosswise by applying a gradual tightening torque up to the

maximum value stated in Table 1 at page 4.

The kits of seals supplied by Stocchetta Cilindri S.r.l. as spare parts shall be stored in

moisture-free areas, avoiding any direct contact with heat sources and the exposure to direct

sunlight.



34

5.4 Inductive proximity switches installation and calibration

Fig. 29

Bore 50 63 80 100 125 140* 160 180* 200 250 320 400 500

F 36 36 36 36 36 36 36 36 36 36 36 36 36

PE 130 137 147 150 160 177 296 205 205 240 260 310 370

PY 92,5 107 120 129 153 181 189 205 231 266 316 314 398

PP^ 130 136 156 182 204 208 232 250 258 308 338 373 428

*: Add stroke

^: Not foreseen by Standard ISO

Tab. 10

Move the cylinder to end of stroke, in correspondence with the head and/or bottom where

calibration shall be carried out.

Disconnect pressure supply and discharge the hydraulic fluid filled in the cylinder chambers.

Slightly lubricate the thread and the sealing O-ring of the inductive sensor by making use of

specific grease type Polymer 400\0 (to be supplied upon request).



35

Fig. 30

Connector Clamping nut Inductive proximity switch

Screw the inductive sensor clockwise into the ring nut, which is inserted in the heads, until it

reaches the end stop.

Fig. 31

Install the connector (variants and overall dimensions in Fig. 22) by paying attention to the

correct alignment with the reference tongue positioned in the sensor; lock the sensor in place

by making use of the special clamping ring nut.

Documents

ISO 3320 Hydraulic cylinders SL 250 – SL 350 Series · 2017-08-06 · Stocchetta Cilindri S.r.l. – Via Capretti n°14 , 25136 Brescia – Italia – ISO 3320 Hydraulic cylinders