All the CMI cylinders have collar threads on the cylinder body and mounting holes in the base. They are supplied with an interchangeable grooved pushing saddle and models above 30 tonne are supplied with a handle for the carrying. A wiper seal is fitted on models above 5 tonne to prevent the penetration of dirt and to extend the life of the cylinder.
OPERATIONAL AREAS
These cylinders can be operated in any position and are extremely versatile and suitable for different applications, including industrial works, steel structural works, presses and special applications. The nitride treatment gives these cylinders an excellent resistance to corrosion and makes them particularly suitable to operate in the open air or in aggressive environments.
ACCESSORIES : – ZTT tilt saddlereduces the effects of any possible off-centred load. – Base plates. ZAB – Clevis eyes. ZAR and ZAE
STANDARD : – Base mounting holes. – Pushing saddle prevents any risk of rod deformation.
Five models of this type of cylinder are manufactured in a high resistance aluminium cylinder body (and end of stroke nut for 100 tonne) with a protective treatment, to increase the resistance to corrosion. Wiper seals are fitted to prevent the penetration of dirt. It’s recommended to carefully avoid, despite the protective treatment, the eventual flow of water which, due to the galvanic currents, can deteriorate the surface. Given the sensitivity of the material to work stress we suggest a maximum use of 5000 work cycles. All models are supplied with interchangeable grooved pushing saddle and have two lateral threaded holes to enable the mounting of a tilt saddle to reduce the effects of any side loading.
They are also fitted with a removable carry handle.
OPERATIONAL AREAS
Because of their extremely low weight and dimensions these cylinders are particularly suitable for use in applications where lightness and ease of handling are paramount.
ACCESSORIES : – SeparateZTT tilt saddle reduces the effects of possible off-centre loads.
STANDARD : – Pushing saddle prevents any risk of rod deformation.
Their main feature is their long stroke in respect to their shortness but even though the CMP cylinders represent the widest range of low profile spring return cylinders. All cylinders have a grooved rod top and two threaded holes for the mounting of the tilt saddle. Holes at the bottom of the cylinder are available as an extra and the wiper avoids the prenetration of dirt.
OPERATIONAL AREAS The small dimensions and the complete treatment against corrosion makes these cylinders ideal for lifting, levelling, supporting and pressing operations in restricted working areas and/or harsh environments.
General maintenance work, industrial assembly and construction are among the most common applications for this type of cylinder .
ACCESSORIES: – Separate ZTT tilt saddle reduces the effects of possible off-centred loads.
STANDARD: – Tilt saddle mounting holes.
OPTIONS : – F version Cylinder with base mounting holes for fixing purposes.
Sono totalmente realizzati in alluminio (ad eccezione dello stelo e degli occhielli) e caratterizzati da un trattamento superficiale di anodizzazione.
Sono provvisti di soffietto per la protezione degli steli e, nei modelli a partire dalle 30 tonnellate, di maniglia di trasporto.
CAMPI DI UTILIZZO
Trovano specifico impiego nella cantieristica navale e nella carpenteria metallica pesante per accostare piastre, lamiere o elementi prefabbricati che devono essere saldati.
Range in steel ( CMT###N### ).
They are threaded on the body, on the rod and in the base to mount the proper accessories. The internal and external nitriding treatment gives them a proper resistance to wear and corrosion.
Range in aluminium ( CMT###L### ).
Manufactured totally in aluminium (except the rod and the eyelets) these cylinders are characterized by their superficial anodizing treatment. They are equipped with a bellow in order to protect the rod, and from 30 tonne models they are also equipped with handles to ease their transport.
OPERATIONAL AREAS
Range in steel ( CMT###N### ).
Their use is suggested in situations where it is necessary to closen small masses in assemblies, in buildings and in laboratories to test the resistance of materials.
Range in aluminium ( CMT###L### ).
They are especially used in ship buildings and in steel structural works to pull together plates, or prefabricated parts which have to be welded together.
ACCESSORI :
– ZAS set of eyelets for series N cylinders
All COD cylinders have a threaded body, rod and base. This feature makes them estremely versatile. A complete range of accessories for working with various applications are available. The guide and end of stroke nutare provided with a wiper to prevent the entrance of dirtand to improve the working life of the cylinder.
OPERATIONAL AREAS
These cylinders are used in industrial applications where a large number of cycles are required. They are used in blocking operations, in laboratories and for tests which need pushing and pulling forces. The nitride anti-corrosive treatment makes them suitable for works in harsh environments and in the open air.
ACCESSORIES:
– ZAE Clevis eyes to be mounted on the rod or at the bottom. – ZAF Flange to be mounted on the machined ends of the body. – ZAP Plate to be mounted on the machined ends of the bod as alternative to the flange. – ZAA Nut to block either the flange or the plate.
Tutti i cilindri COF sono forniti con testina forata liscia e dispongono di foro passante e di filettatura sul corpo, nello stelo e nella base, per facilitare il fissaggio o l’inserimento di opportuni accessori. Una valvola di sicurezza collegata alla camera di ritorno ne impedisce la sovrapressione. La ghiera di fine corsa è completa di raschiatore, che impedisce l’ingresso di impurità nel cilindro. Il trattamento protettivo adottato in questi cilindri si rivela particolarmente adatto a proteggere il foro centrale dagli agenti aggressivi esterni.
CAMPI DI UTILIZZO
Il foro passante rende i cilindri particolarmente indicati per operazioni di tesatura di tensostrutture, montaggio ed estrazione di pulegge, boccole e tubi di scambiatori di calore. Sono utilizzabili sia in spinta sia in trazione inserendo una barra o una fune opportunamente vincolata alla testina.
ACCESSORI
Testina filettata ZTE permette il fissaggio di barre filettate.
STANDARD
Testina forata liscia evita il rischio di deformazioni dello stelo.
OPZIONI
versione L, cilindri con corpo in alluminio (COF###L###)
All COF cylinders are supplied with a smooth hollow saddle and have a have a threaded body, rod and base to facilitate the fixing and inserting of the necessary accessories. These cylinders are equipped with a safety valve which is connected to the retract chamber and prevents any possible overpressure. The end of stroke nut has a wiper to prevent the entrance of dirt.
The nitride anti-corrosive treatment makes them suitable for works in harsh environments and in the open air.
OPERATIONAL AREAS
The through hole makes them particularly suitable for tensioning, mounting and the extraction of pulleys, bushings and heat exchanger pipes. They can be used in pushing and pulling operations by putting a bar or a cable attached to the saddle.
ACCESSORIES: – ZTE threaded saddle allows the mounting of threaded bars.
STANDARD: – Smooth hollow saddle avoids any risk of rod deformation.
OPTIONS: L version, cylinders with aluminum body ( COF###L### )
Designed in function of their strength, they have the extremity of the rod equipped with grooved saddles in order to improve the grip of the load. All models are equipped with eyelets to facilitate their transport and positioning. A safety valve, calibrated at 150 bar, connected to the return chamber, avoids possible overpressure.
OPERATIONAL AREAS
They are very solid hydraulic cylinders recommended for lifting, pillaring and lowering operations. Given their double acting configuration they are suggested for the synchronous lowering with split flow power packs. They are mostly used in works of civil, naval, iron metallurgy, mechanical engineering, in industrial assembly and in heavy carpentry where the quick and total return of the rod and the support of the load with the safety nut are fundamental requirements.
OPTIONS:
– F version, cylinder with base mounting holes for fixing purposes.
ACCESSORIES:
– Separate ZTT tilt saddle reduces the effects of possible off-centred loads.
These cylinders are equipped with a collar thread, an internal rod thread and base mounting holes. They are supplied with an interchangeable grooved saddle and models over 30 tonne have eyelets to facilitate their transport. For models with 30 ton or higher, the hole in the rod is not suitable for traction but only for the mounting of tilt saddles or other equipment. A safety valve connected to the retract chamber avoids any possible overpressure. The guide nut has a wiper ring to prevent the entering of dirt and to extend the working life of the cylinder.
OPERATIONAL AREAS
They are highly versatile and strong cylinders designed to be used in industrial applications with a high number of working cycles. They are also used in the pushing of underpass constructions and in piling operations and given their threaded collar they can be mounted on presses.
ACCESSORIES: – Separate ZTT tilt saddle reduces the effects of possible off-centred loads.
STANDARD : – Base mounting holes. – Pushing saddle prevents any risk of rod deformation.
These cylinders are equipped with a collar thread, an internal rod thread and base mounting holes. They are supplied with an interchangeable grooved saddle and models over 30 tonne have eyelets to facilitate their transport. For models with 30 ton or higher, the hole in the rod is not suitable for traction but only for the mounting of tilt saddles or other equipment. A safety valve connected to the retract chamber avoids any possible overpressure. The guide nut has a wiper ring to prevent the entering of dirt and to extend the working life of the cylinder.
OPERATIONAL AREAS
They are highly versatile and strong cylinders designed to be used in industrial applications with a high number of working cycles. They are also used in the pushing of underpass constructions and in piling operations and given their threaded collar they can be mounted on presses.
ACCESSORIES:
– Separate ZTT tilt saddle reduces the effects of possible off-centred loads.
STANDARD :
– Base mounting holes.
– Pushing saddle prevents any risk of rod deformation.
The cylinders used for lifting operations through cables (Strand Jacks) are a compact and effective solution for the positioning of heavy loads which operate both in lifting and lowering. Their operating principle is the same of precompressioning and post-tensioning systems, with a bundle of cables (strands) which are guided through wedge grips arranged both at the base and at the rod end of the cylinder, passing through the central hole of the cylinder itself. It is then possible to carry out liftings for serveral metres with repeated strokes of the cylinder. The heads were the wedge grips are located are hydraulically controlled to lock and unlock the wedges so that the cylinders can be used also for lowering operations. A piloted check valve is fitted on the cylinder inlet as a safety provision against any possible hose rupture and as a control of the lowering speed. The cylinders are equipped with position sensors which communicate to the management system the reaching of the points of intervention commands to sequence them appropriately in relation of the desired direction. If requested, the cylinders can be equipped with a linear stroke transducer in order to verify the position of the rod. A block with a clevis and a stud is provided with the cylinder. Thank to the wedge grips which grip the cable, it allows the cables insertion and the locking and unlocking from the outside. The cylinders are designed to be used with standard 0.6″ strands (not supplied) with a safety factor of 2.5. This limits the wearing of the strands and of the wedge grips, which can therefore be used several times. The access to the terminal heads where the wedges are located is however facilitated by the constructive solution adopted for the cylinder. Accessories such as strand recoilers, strand guides or other devices for the guiding and recollection of the strands can be designed and delivered according to the specific needs. Each cylinder is operated by a dedicated control unit, equipped with solenoid valves to control both the cylinder itself and the hydraulic lock and unlock of the terminal heads, of the pressure gauge and of the electrical box for the power of the motor and valves with connector for the control cable, four 5 metre hoses with quick couplings. The control unit specifications for each cylinder are shown in the table below. Two control systems with PLC for the automation of lifting and lowering movements are available:
– ZMRJ1 for single cylinders, with a three-position selector (lifting, hold, lowering) and emergency stop;
– ZMRJ4 to control up to 4 cylinders simultaneously, with 4 two position switches to include or exclude each cylinder from the operation, a three-position selector (lifting, hold, lowering) and emergency stop. This system performs lifting and lowering cycles operating on the cylinders relating on the contacts arranged on the cylinder itself to determine its position. Each stroke ends when all the cylinders operating have reached the end of stroke, before starting the retraction of the cylinders. Since the cylinders are controlled by control units of the same flow, the movement speed is substantially equal for all the cylinders and it is thus possible to obtain a simple and efficient synchronization system similar to the split-flow systems.
