ISO 6022 Hydraulic Cylinders ISM Series
ISO 6022 Hydraulic cylinders ISM Series Use and maintenance manual APP 0004-4.2014 REV.00 Revisione Data Emissione 00 01/01/2015 Modifiche PRIMA EMISSIONE Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italia –
APP 0004-4.2014 ISM SERIES – USE AND MAINTENANCE MANUAL 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 Repair 4.1 4.2 Spare parts 5 Maintenance/replacement of parts subject to wear Maintenance of cushioning adjustment cartridges 5.1 5.2 Replacement of seals of the rod guide bushing 5.3 Replacement of piston seals 5.4 Inductive proximity switches installation and calibration Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 1 Product information 1.1 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 ISM – ISO 6022 main components: 1 Rod 2 Flange 3 Oil connections 4 Cylinder front head 5 Mounting elements (ex. rear clevis) 6 Threaded flanges 7 Cylinder barrel 8 Cylinder end cap (or cylinder rear head) The Stocchetta Cilindri ISM series of hydraulic double acting cylinders and servo-cylinders has been conceived to meet the most demanding actuation requirements in the iron and steel sector, in compliance with ISO 6022 and DIN 24333 construction standards. The compact 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. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 Technical specifications 1.2 Interchangeability dimensions According to standard ISO 6022 and DIN 24333 Nominal operating pressure (non-stop operation) 250 bar (25 MPa) Max. operating pressure 300 bar (30 MPa) Rod diameters According to the bore type, 2 diameters are available from 32 mm to 360 mm. Stroke Upon customer’s request, with dimensional tolerances from 0 to 1 mm for values up to 1000mm and from 0 to 4 mm up to 6000 mm Max. standard speed 0.5 m/s Standard temperature From -30 C to 100 C Standard hydraulic fluid Mineral oil in compliance with ISO 6743/4 – 1982 standards and purity degree in compliance with ISO 4406 standard Mounting and accessories 5 different kinds of standard fixings in compliance with ISO standards and 1 non-compliant fixing, provided with a large range of accessories capable of meeting any kind of operational requirement Tab. 1 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 2
APP 0004-4.2014 1.3 ISM SERIES - USE AND MAINTENANCE MANUAL General product description Fig. 2 The rod (A) has been obtained from bars of hardened and tempered, high-strength, chromed and honed alloy steel with roughness Ra 0.2 µm. The rods, up to diameter 110mm, are induction hardened and tempered before the chromium plating, with Rockwell hardness C 54. This solution assures longer life of seals. The dimensions are based on a safety factor 4:1, referred to the ultimate tensile strength and maximum operating pressure. The Piston (C), necessary for force transmission, is made of spheroidal graphite cast iron, it is connected to the rod by means of threaded connection and clamped in position by means of a dowel, in order to ensure highest reliability also in extreme conditions. Its standard configuration includes some guide rings (M) in composite material (static load 345N/mm2) which, besides having a support function, operate as barrier against possible impurities affecting the seals. The seal is made of bidirectional polyurethane (I), internally energized by means of O-ring, it ensures excellent tightness, movements free of sticks and slips and prolonged resistance to wear. Alternatively, a configuration of piston with packing seals, Chevron type (see Fig. 3), is also possible. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 3
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 4 Fig. 3 – Application with seals, Chevron type 1 Front piston 2 Chevron seals 3 Piston guide 4 Rear piston The Cylinder head (D), 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 flanges (H) 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 this table: BORE (mm) SCREWS TORQUE (Nm) Tab.2 50 M8 63 M10 80 M12 100 M14 125 M16 140 M18 160 M20 180 M22 200 M24 250 M30 320 M39 12 23 43 77 134 192 272 376 517 1008 1218 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 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. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 5 End cap (F). When the rod retracts, the piston can abut against the end cap. In this case, the tensile forces and possible external loads are absorbed by the end cap. 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 flanges (H). The tightening torques of the screws that clamp the end cap have been stated in Table 2 at page 4. The rod guide bushing (G) in spheroidal graphite cast iron is highly resistant to wear. The surface of the guide bushing supports the rod when it slides. Standard configuration includes a packing seal (LC), Chevron type, on the farthest side of the bushing, thus enabling continuous lubrication when in motion. For easy maintenance, the bushing provided with seals has been introduced in a precision seat and locked in place by a front flange (N) attached to the head. Up to diameter 100 mm (included) the flange is threaded; for greater diameters the flange is fastened by means of screws (the same for the low-friction bushing). The corresponding tightening torques are illustrated in the following table: BORE (mm) SCREWS TORQUE (Nm) Tab. 3 125 M10 140 M12 160 M12 180 M14 24 45 45 56 200 250 M14 M16 60 150 320 M20 300 The scraper (B) is positioned in the flange thus ensuring the cleaning of the rod when it retracts. A low friction configuration is possible also for the rod guide bushing (see fig. 4). Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 6 Fig. 4 – Bushing- low friction configuration 1 Front flange 2 Rod guide bushing 3 STEPSEAL seals 4 Guide rings 5 Head 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 (I), used between two non-moving parts. For instance, the seals between head (or end cap) and barrel or between rod and piston. - Dynamic (L) (LC), used between moving parts. For instance, the seals between rod and bushing or between piston and barrel. - Guide rings (M), they act as support and ensure the correct sliding between piston and barrel. The seals must be replaced at regular intervals (see paragraphs 5.2 and 5.3). The kits fitted to the cylinder (and for possible replacement) are: standard, high temperatures or aggressive fluids, water glycol, low friction. Gradual action, front and rear cushioning. The front cushioning, rod side, has been realized by means of a self-centering braking ogive, with special profile for gradual cushioning and absence of pressure peaks. The braking effect in opposite direction is made possible thanks to the ball by-pass valve in the head. The rear cushioning is obtained by means of the tail rod and self-centering ring in special, high-strength, seizure-free material. The ring nut, thanks to its design, acts as by-pass valve in reverse direction in order to enable quick rod exit. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL The mounting elements enable the cylinder installation in the machine or in the system. They are enbloc and highly resistant, their dimensions and tolerances comply with ISO 6022 standard and related regulations. In addition to these mounting elements, also foot mounting is available, according to standard sizes available on the market. 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. In long-stroke cylinders or in the regenerative circuits, in which the annular chamber is steadily under pressure, it is advisable to ask for a connection on the front head to drain the fluid which has deposited between the first and the second tightening seal. The spacers (see Fig. 5) prevent the piston from abuting against the head when the rod is completely extended, in order to increase the distance between piston and head. This enables an increase of the lever arm between the bushing and the piston, with consequent increase of rod stiffness. The number of spacers to be used depends on load conditions and kind of fastening (see specific catalogue). Fig. 5 Spacer Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 7
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 2 Use of manual 8 This use and maintenance manual describes the cylinder ISO 6022, 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 36 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 IMPORTANT GLOVES Information which, if used, protects the product and/or the environment from material damages Instructions for a better use of the cylinder when in operation or adjustment and/or maintenance instructions. 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. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 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 technical trained 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 delivery corresponds to order specifications Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 9
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 3 Decommissioning 3.1 10 Preparation to decommissioning DANGER HIGH OPERATING PRESSURE IN THE HYDRAULIC CYLINDER Danger of injuries or damages to people and things due to mobile parts or oil leakage during operation! Disable all the 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 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 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. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 11
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 4 Repair and spare parts 12 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: info@stocchettacilindri.com 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: info@stocchettacilindri.com 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. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 5 Maintenance/ replacement of parts subject to wear 5.1 Maintenance of cushioning adjustment cartridges. ISO 6022 cylinders are provided with a cushioning adjuster with needle valve. If the adjustment cartridge leaks, this means that the seals must be replaced. Fig. 6 – Layout cushioning adjuster 1 Needle 2 Lock 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. 5 and 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 seat 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. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 13
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL Replacement of seals of the rod guide bushing 5.2 Configuration with seals, CHEVRON type; Threaded front flange (up to diameter 100 mm included); Fig. 7 Pos. No. Description A 1 Scraper B 1 Seal, CHEVRON type C 1 Back-up O-ring Tab. 4 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 14
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 15 Check that the surface of the rod is free from damages that may affect the service life of the seals. Unscrew the front flange by making use of the four holes for 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 (Fig. 8). Fig. 8 Insert the packing seal into the seat of the rod guide bushing and re-assemble the bronze supporting ring. Assemble the front flange being careful not to damage the rod and screw it by making use of the four holes for wrench operation. In order to ensure that the flange does not get loose upon working stages, clamp it with Loctite no. 242 (medium thread-locker) after having carried out an accurate degreasing of the components concerned. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 16 Configuration with seals, CHEVRON type; Bolted front flange (from diameter 125 mm included); Fig.9 Pos. No. Description A 1 Scraper B 1 Seal, CHEVRON type C 1 Back-up O-ring Tab. 5 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
ISM SERIES - USE AND MAINTENANCE MANUAL APP 0004-4.2014 17 Check that the surface of the rod is free from damages that may affect the service life of the seals. Unscrew the clamping screws of the front flange and pull it off, 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 (Fig. 10) Fig. 10 Insert the packing seal into the seat of the rod guide bushing and re-assemble the bronze supporting ring. Assemble the front flange being careful not to damage the rod and clamp it by tightening the corresponding screws with suitable torque (see table Tab. 3 at page 5). Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 18 Low friction configuration; Threaded bushing (up to diameter 100 mm included); Fig. 11 Pos. No. Description H 1 Scraper J-K 1 1 STEPSEAL L 3/4 Guide rings C 1 Back-up O-ring Tab. 6 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL Check that the surface of the rod is free from damages that may affect the service life of the seals. Unscrew the rod guide bushing by making use of the four holes for 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 – (see notes at the end of paragraph) 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 (Fig. 12). Fig. 12 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 19
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL Install the seals in the bushing by operating evenly and avoiding any use of metallic, sharpedged 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. 13 or by making use of special tools as illustrated in Fig. 14. The seal shall be given a “kidney” shape and shall be free from any edges in its bends. Fig. 13 Fig. 14 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 (Fig.13). 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 (example in Fig. 15). Fig. 15 Rounded-smooth radius Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 20
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 21 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 by making use of the 4 holes for wrench operation. In order to ensure that the bushing does not get loose upon working stages, clamp it with Loctite no. 242 (medium thread-locker) after having carried out an accurate degreasing of the components. Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 22 Low friction configuration; Bolted bushing (from diameter 125 mm included); Fig. 16 Pos. No. Description H 1 Scraper J,K 1 1 STEPSEAL L 3/4 Guide rings C 1 Back-up O-ring Tab. 7 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL Check that the surface of the rod is free from damages that may affect the service life of the seals. Unscrew the clamping screws of the rod guide bushing and pull it off 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 – (see notes at the end of paragraph) 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 (Fig. 17). Fig. 17 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 23
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL Install the seals in the bushing by operating evenly and avoiding any use of metallic, sharpedged 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. 18, or by making use of special tools as illustrated in Fig. 19. The seal shall be given a “kidney” shape and shall be free from any edges in its bends. Fig. 18 Fig. 19 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 (Fig.18). 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 (example in Fig. 20). Fig. 20 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy – 24
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 25 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 place it into the head seat. Clamp the rod guide bushing by tightening the relevant screws with suitable torque (see the table relevant to front flange, Tab. 3 at page 5). Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL Replacement of piston seals 5.3 26 Configuration with seals, CHEVRON type; Fig. 21 Pos. No. Description A 1 O-ring B 2 CHEVRON seal C 1 Stop dowel D E 1 1 (Each barrel side) O-ring Back-up ring Tab. 8 Stocchetta Cilindri S.r.l. – Via Capretti n 14 , 25136 Brescia – Italy –
APP 0004-4.2014 ISM SERIES - USE AND MAINTENANCE MANUAL 27 Hereunder a list of directives to be observed for a correct replacement of piston seals. Use the drawing of Fig. 21 as reference. Remove the screws that fix the head to the ring nut 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 unit, release the stop dowel C and remove the piston. 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 a
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 ISM - ISO 6022 main components: 1 Rod 2 Flange 3 Oil connections 4 Cylinder front head 5 Mounting elements (ex. rear clevis)
The cylinders are available both as single and double acting version, steel, aluminum or stainless steel made, with short or long strokes, a very varied range of compact, hollow cylinders, extra flat or high tonnage cylinders suitable for the customer's application. F.P.T. HYDRAULIC CYLINDERS HYDRAULIC CYLINDERS INDEX 34 32 30 28 26 24 22 20 .
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ISO 18400-107, ISO 18400-202, ISO 18400-203 and ISO 18400-206, cancels and replaces the first editions of ISO 10381-1:2002, ISO 10381-4:2003, ISO 10381-5:2005, ISO 10381-6:2009 and ISO 10381-8:2006, which have been structurally and technically revised. The new ISO 18400 series is based on a modular structure and cannot be compared to the ISO 10381
1) Minimum wall thickness shall not less than 87.5% of nominal wall thickness in accordance with ASTM D2996. 2) Use these values for calculating longitudinal thrust. 3) No-shave pipe. Typical pipe performance Nominal Pipe Size Internal Pressure Rating1 Collapse Pressure Rating2 Designation in mm Psig MPa psig MPa Per ASTM D2996
