PTFE compensators General description of PTFE compensators

Transcription

1 PTFE compensators General descripti of PTFE compensators For more than years STFLEX PTFE compensators have been manufactured from top quality materials. They have served with distincti throughout decades of practical use. Cstant further development and innovatis ctinuously update our product range to meet the demands of current and changing markets. The result: efficient and highly reliable products with superior durability. PTFE compensators are mainly used in the following industries: Chemical industry Process engineering Food product industry Beverage industry Pharmaceutical industry Treatment and disposal technology Informati Technology Purpose Development/Design Versis 1 PTFE compensators have been developed for certain applicatis. PTFE has a universal chemical resistance against almost all chemicals and solvents within its ctinuous operating temperature with the excepti of molten alkalis, elementary fluorine and certain halogenes. They are used primarily in appliances, machinery, apparatus and pipe-systems to compensate for movement to compensate for expansi caused by differences in temperature to reduce tensi to dampen oscillati, hinder vibrati transmissi, muffle noise/ sound as adapters to compensate for assembly or installati inaccuracies. STFLEX PTFE compensators are rated by calculati and optimized by experimentati. Our development engineers use the most up-to-date development tools to validate the design process in terms of form, functi and installati from the earliest stage of the development process. This ensures that we can provide efficient, highly dependable products with a lg service life. STFLEX PTFE compensators vary with regard to the following criteria: type (universal and lateral compensator) structure of the bellows (rated to pressure and temperature load) flange cnecti Our PTFE compensators are delivered ready for installati. In additi to our standard versis featured in the catalogue, we also develop special versis that are produced to operate under special cditis. Cnecting parts (that deviate from ), such as ISO,, BS, VG, SAEstandards etc. can also be supplied. axial lateral angular Universal PTFE compensators Structure: Bellows with cnecti parts (rotating flanges) Movement absorpti: The absorpti of axial, lateral, angular and simultaneous movement is possible. Universal compensators with two bellows and a cnecting pipe are used to absorb large movement. Fixed points: Robust pipe fixed points and correct pipe-routing are essential when axial force must be absorbed. lateral Lateral PTFE compensators Structure: Bellows with flanges and laterally moving restraints Movement absorpti: Lateral shift of the compensator is possible. The restraint absorbs axial reacti force and relieves pressure the pipe s fixed points. Lateral compensators with two bellows and a cnecting pipe are used to absorb large movement. Fixed points: Only light fixed points are needed to absorb lateral moving and fricti force.

2 PTFE bellows Structure The STFLEX type Ai compensator csists of a single cvoluti molded bellows with synthetic fibre reinforcements. The bellows is equipped with a seamless PTFE lining and self-sealing flared ends. From 0 ward, type Ai is also equipped with an inner PTFE supporting ring. The type P compensator csists of a multi-cvoluti molded PTFE bellows with self-sealing PTFE flared ends. Outer stainless steel stabilizing rings between the cvolutis ensure that the shape will not change. They also stabilize the compensator. The compensators can be supplied with twin, three-fold or five-fold cvolutis. Rubber compensator type Ai with PTFE-lining PTFE bellows are available in two material grades: Bellows of white PTFE Bellows of black PTFE White PTFE bellows are not electrically cductive. Hence they also insulate. Black PTFE bellows incorporate added soot. They are electrically cductive. The impedance is: < Ohm ( IEC 9, VDE 00-0). The bellows are ctour-molded by high density extrusi. The bellows are not mechanically machined from solid material. The operating limits of the bellows (pressure load ability depending temperature) must be observed when rating the compensators. 2 Material qualities STFLEX PTFE bellows are made from top quality material grades to cover a range of operating cditis in many different areas. PTFE is physiologically harmless within its thermal range of applicati. Detailed documents regarding media resistance of PTFE bellows are available. PTFE compensator type P Material grade Trade names Properties Applicatis PTFE Polytetrafluoroethylene Tefl Hostafl Flu Polyfluor Heat-, and weather-proof material with outstanding chemical resistance to aggressive media. Excellent electrical insulating properties*. Temperature resistance in ctinuous operati from 0 C to +0 C. Organic and inorganic acids, lyes, chloride, sulphate, solvents, bleaches, peroxide, fuels, mineral oil, hydraulic oil, halogens, gases *(white material)

3 PTFE compensators General descripti of PTFE compensators Cnecti parts STFLEX PTFE compensators are supplied ready for installati. They are cnected to pipes, fittings, pumps, tanks etc., by standard flanges. The cnectis are standardized to fit coercially available pipes and flanges. See data sheets for details. s s for PTFE compensators in the Ai-series have a special turned groove to accoodate the rubber rim and are mounted in a rotating positi at the bellows. This makes it much easier to mount the pipeline. The flanges have stabilizing collars the side facing the bellows. This stabilizes the bellows and ensures compliance with safety spacing between the ends of the screws and the rubber bellows throughout the entire pressure and movement range. This eliminates the risk of damage to the rubber bellows possibly caused by the screwends. STFLEX PTFE compensators in the P-series have rotating flanges. STFLEX lateral compensators with tie rod restraints, have been developed for high operating pressures or large-diameter pipes. The axial force produced by pipeline inner pressure is absorbed by the compensator restraints. They relieve the pressure the fixed points of the pipeline. s for lateral compensators are equipped with ears for tie rod restraints. Depending compensator type and size, they differ as follows: with molded ears Oval flanges s made of unalloyed steels are electrogalvanized or given an anticorrosi prime coating. Stainless steel is used to meet tougher corrosi protecti requirements. Other materials and forms of corrosi protecti (hot-dip galvanizing, special varnish, special coating etc.) are available. material Material No. as per Designati as per / Unalloyed steel 1.00 SJRG2 (RSt 7-2) Stainless steel XCrNiTi XCrNiMoTi Note The permissible operating and testing pressure depends the rating of the overall compensator taking account of all compents: bellows flanges restraints Standard flanges of the PTFE compensators are machined mechanically to the tolerated fit-sizes. Standard flange with turned groove to accoodate rubber bellows and stabilizing collar (universal compensator) Oval flange with ears for the restraints (lateral compensator) with molded ears for the restraints (lateral compensator)

4 Restraints Restraints are used for lateral compensators. The restraints absorb axial reacti force produced by internal pressure. Even so, the cnected pipe must still be equipped with light fixed points to absorb the moving force. The precise rating and operating parameters of the correspding machine or plant must be known for optimum calculati of the restraints. Standard restraints are available for the lateral compensator program. The restraints are calculated the basis of material strength values at +0 C. Reduced strength values are taken into csiderati at higher temperatures. Tie rod restraints There are two types of tie rod restraints for lateral PTFE compensators Outer restraints: to absorb reacti force from internal pressure (e.g. type Ai-2, P2) Outer and inner restraints: to absorb reacti force from internal pressure and vacuum (type P-4). The tie rods in the flange ears are flexibly carried silencing rubber sockets up to spherical washers and cical seats as from 17. Sound-damping outer restraint (lateral compensator) Sound-damping outer and inner restraint (lateral compensator) 4 Standard tie rods, spherical washers and cical seats are electrogalvanized. Stainless steel can be used for restraint elements to meet higher corrosi protecti requirements. Other anti-corrosi treatment hot-dip galvanizing, special varnish, special coatings are available. Outer restraint with spherical washer and cical seat (lateral compensator) Material tie rod restraint Material No. as per Unalloyed steel Tie rods.,. Washers, Stainless steel Tie rods, washers A2 0, 70 A4 0, 70 Outer and inner restraint with spherical washer and cical seat (lateral compensator) Designati as per () or strength class

5 PTFE compensators General descripti of PTFE compensators Accessories STFLEX PTFE compensators can be equipped with the following accessories: internal guide sleeves protective covers Internal guide sleeves Normally internal guide sleeves are not required to reduce flow resistance because STFLEX PTFE compensators have a streamlined surface with large transiti radii (flow lines). However, abrasive media or high flow velocities with high-frequency vibratis or turbulence (such as occur behind a pump) make it necessary to install internal guide sleeves. The internal guide sleeves are made of PTFE and are fitted with a flared flange. In the case of purely axial movement, cylindrical internal guide sleeves are used. For lateral and/or angular movement, cical internal guide sleeves are fitted (tapered cross secti). It is very important to note the directi of flow when installing compensators with internal guide sleeves. Protective covers STFLEX protective covers for compensators are used where special operating cditis make it necessary to protect the compensator from external effects, or where adverse operating cditis and dangerous flow media make it necessary to protect the envirment with a preventive splash-guard. Properties Flame-proof Flexible Material Fabric Use As protective cover to prevent flame penetrati up to +00C for up to 0 min. to preserve the full operatial ability of the compensator for this period. Structure Flexible flame-proof protecti cover made of special fabric with heat-resistant insulati inlays; ready for installati with fastening screws to seal the cover. Installati The compensator is mounted as usual. The protective cover also encompasses the pipe flanges. STFLEX flame-proof protecti cover K-1 Symbols for a quick product selecti The easy-to-find-list: symbols and their meaning. The colour bar of the following data sheets indicates small symbols depicting the special features of the correspding types, for easy pre-selecti. Compensator to absorb lateral movement Resistant to hot water (combined with temperature symbol) Universal compensator to absorb simultaneous movement in all three directis Suitable for drinking water Maximum product pressure rate Suitable for acids and lyes cnectis Suitable for oil or fatty media 0 Maximum temperature Suitable for gaseous media

6 Applicatis / Possible uses / Industries Basic compensator types Lateralcompensators Universalcompensators STFLEX Compensator types Ai-1 P-1 Ai-2 P-2 P-4 Applicatis Reducing tensi Absorbing axial movement Absorbing lateral movement Absorbing angular movement Muffling oscillatis at appliances Vibrati damping Compensati for installati inaccuracies Possible uses Metal pipes Plastic pipes Pipes for aggressive media Pumps Fittings Mechanical engineering Chemical industry Plant engineering Refuse incinerati Table showing prime applicatis, possible uses and industries Industries Program suary Universal PTFE compensators Type Pressure rate bar Max. operating temperature Bellows material Ai PN +90 C EPDM with PTFE lining Cnecti parts rotating flanges Page.7 P-1-00 PN, +0 C PTFE rotating flanges.9 Lateral PTFE compensators Ai PN +90 C EPDM with PTFE lining rotating flanges with tie rod restraint P-2-00 PN. +0 C PTFE rotating flanges with tie rod restraint P-4-00 PN. +0 C PTFE rotating flanges with tie rod restraint

7 0 Ai-1/1-J04 Rubber compensator with PTFE lining Type Ai-1 Universal compensator 2 00 Applicatis 7 Structure type Ai-1 Universal compensator csisting of a rubber bellows with seamless PTFE lining and rotating flanges Material grade* Colour code Possible uses EPDM/PTFE orange with stamp PTFE-Inliner for cveying aggressive media very good chemical resistance resistant to most of the acids and lyes for compensating axial, lateral and angular movement for muffling vibrati and noise Rubber bellows with PTFE lining PN Flat-cvoluted molded bellows made of EPDM Synthetic fibre reinforcement Wire-reinforced rubber rim Seamless PTFE lining with self-sealing flared ends, from 0 with inner PTFE supporting ring Chemicals, acids, lyes *Check or inquire about the resistance of the rubber grade to temperature and medium Property Max. perm. operating pressure Bursting pressure Vacuum Pressure bar bar not suitable for vacuum Temperature up to +90 C up to +0 C for brief periods* Max. operating pressure to be set 0 % lower for shock loads. *> +90 C the manufacturer's approval must be obtained for the correspding operating cditis for reducing thermal and mechanical tensi to compensate for installati inaccuracies chemical industry beverage industry Accessories Internal guide sleeve of PTFE Protective cover Certificates CE (DGR 97/2/EC) s Versi Rotating flanges with stabilizing collar drilling for through bolts Special turned groove for rubber rim Dimensis Standard: 2-17 (PN ) 0-00 (PN ) according to 01 Others:,, BS etc. Cnecti dimensis see technical annex Materials Standard: 1.00 (RSt 7-2) Others: 1.441, 1.471, plastic (PP) Corrosi protecti Standard: 2 - electrogalvanized anti-corrosi primed Others: hot-dip galvanized, special varnish, special coating, etc. STFLEX type Ai-1with PTFE lining used in the chemical industry

8 0 Ai-1/2-J04 Dimensis standard program Versis BL* Pressure rate bar ø di Bellows inner ø ø C Raised face ø ø W Cvoluti ø unpressurized PN cnecti 01 ø D oute ø b thickness * 2-00 also available as type Ri-1, length 10. For manufacturing reass the inner diameter may vary by ± or ± ax lat ang A* Axial movement Lateral Angular movement movement Compressi Elgati + ± Please inquire for simultaneous (different) movement *Effective bellows cross sectial area is a theoretical value ± degrees Movement compensati/bellows cross sectial area Effective bellows cross sectial area at bar cm Weight approx. kg Type Ai-1 Universal compensator with PTFE lining and PTFE supporting ring Note Please comply with the general technical instructis regarding reacti force, moving force, fixed point load, installati instructis etc. Subject to technical alteratis and deviatis resulting from the manufacturing process.

9 0 PTFE compensator Type P-1 Universal compensator 00 P-1/1-A07 9 Structure type P-1 Universal compensator csisting of PTFE bellows with rotating flanges PTFE bellows PN / PN 9 /. Multiple cvoluti bellows made of PTFE Outer supporting rings of stainless steel between the cvolutis Bellows with self-sealing PTFE flange ends Inner surface repellent of foreign matter Material quality* PTFE Possible uses Aggressive acids and lyes, e.g., chloride, sulphate, solvents, bleaches, peroxide, fuels *Check or inquire about the resistance of the material quality to temperature and medium Pressure rate max. tol. operating pressure Vacuum Temperature PN PN 9 PN. bar. bar 2. bar 1.7 bar 9.0 bar bar 4.0 bar 2. bar, bar 7 bar 4 bar bar up to + C up to +0 C up to + C up to +0 C 0.01 bar abs bar abs bar abs Max. operating pressure should be set 0 % lower for shock load Applicatis for cveying aggressive media for compensatig axial, lateral and angular movements for muffling vibrati and noise for reducing thermal and mechanical tensi to compensate for installati inaccuracies chemical industry treatment and disposal technology pharmacentical industry Accessories Internal guide sleeve of PTFE Protective cover s Versi Rotating flange Drilling for through bolts Dimensis Standard: - (PN ) 0-00 (PN ) according to 01 Others:,, BS etc. Cnecti dimensis: see technical annex Materials Standard: 1.00 (RSt 7-2) Others: 1.441, Corrosi protecti Standard: electrogalvanized Others: hot-dip galvanized, special varnish, special coatings STFLEX type P1 in disposal pipes for chloroelectrolysis

10 0 P-1/2-A07 Dimensis standard program Versi BL Pressure rate bar ø di Bellows inner ø ø C Raised face ø PN cnecti 01 ø D outer ø b thickness H height Movement compensati / bellows cross secti at area Larger s other structural lengths, higher pressures, other movement absorpti available. Dimensis according to GR standard available. Type P-1 Universal PTFE compensator ax Axial movement ± C ax Axial recoil rate N/ lat Lateral movement ± ang Angular movement ± degrees A* Effective bellows cross sectial area cm 2 Weightt approx. kg versi Please inquire for simultaneous (different) movement Table values refer to + C and triple cvoluted compensators *Effective bellows cross sectial area is a theoretical value. Note Additial PTFE seals necessary for installati in glass, graphite or ceramic pipes. Type P1 is equipped with check screws as transportati protecti and to guarantee flawless installati. These are not impact-, or force-absorbing parts alg the lines of tie rods, and must be removed after completing installati. Please comply with general technical instructis regarding reacti force, adjusting force, fixed point load, installati instructis etc. Subject to technical alteratis and deviatis resulting from the manufacturing process. Molded ears for restraint as transportati safeguard ly

11 0 Ai-2/1-A07 Rubber compensator with PTFE lining Type Ai-2 Lateral compensator 2 00 Applicatis 11 Structure type Ai-2 Lateral compensator csisting of a rubber bellows with seamless PTFE lining and rotating flanges, also with tie rods (outer restraints) to absorb reacti force from internal pressure Rubber bellows with PTFE lining PN Material grade* Colour code Possible uses EPDM/PTFE orange with stamp PTFE-Inliner for cveying aggressive media very good chemical resistance resistant to most acids and lyes for compensating lateral movement for muffling vibrati and noise Flat-cvoluted molded bellows made of EPDM Synthetic fibre reinforcement Wire-reinforced rubber rim Seamless PTFE lining with self-sealing flared ends, from 0 with inner PTFE supporting ring Chemicals, acids, lyes *Check or inquire about the resistance of the rubber grade to temperature and medium Property Pressure Temperature Max. perm. operating pressure Bursting pressure Vacuum bar bar not suitable for vacuum up to +90 C up to +0 C for brief periods* Max. operating pressure to be set 0 % lower for shock loads. *> +90 C the manufacturer's approval must be obtained for the correspding operating cditis for reducing thermal and mechanical tensi to compensate for installati inaccuracies chemical industry beverages industry Tie rod restraints Tie rods carried silencing rubber sockets Tie rods carried spherical washers and cical seats Materials Standard: tie rods. Others: stainless steel Corrosi protecti Standard: electrogalvanized Others: hot-dip galvanized Accessories Internal guide sleeve of PTFE Protective cover Certificates CE (DGR 97/2/EC) s Versi s with stabilizing collar and ears to carry the tie rods drilling for through bolts Special turned groove for rubber rim Dimensis Standard: 2-17 (PN ) 0-00 (PN ) according to 01 Others:,, BS etc. Cnecti dimensis see technical annex Materials Standard: 1.00 (RSt 7-2) Others: 1.441, Corrosi protecti Standard: 2 electrogalvanized anti-corrosi primed Others: hot-dip galvanized, special varnish, special coating, etc. STFLEX type Ai-2 with PTFE lining in a beverages rack

12 0 Ai-2/2-A07 Dimensis standard program Versis BL* Pressure rate bar ø di Bellows inner ø ø C Raised face ø ø W Cvoluti ø unpressurized PN cnecti 01 ø D outer ø b thickness H height Weight approx. kg * 2-00 also available as type Ri-2, length 10. For manufacturing reass the inner diameter may vary by ± or ± Movement compensati lat Lateral movement ± versis Type Ai-2 Lateral compensator with PTFE lining, with tie rods (outer restraints) carried silencing rubber sockets Note Please comply with the general technical instructis regarding reacti force, moving force, fixed point load, installati instructis etc. Subject to technical alteratis and deviatis resulting from the manufacturing process Number of tie rods depending pressure Type Ai-2 Lateral compensator with PTFE lining, with tie rods (outer restraints) carried spherical washers and cical seats.

13 0 PTFE compensator Type P-2 and P-4 Lateral compensator 00 P-2/-4/1-A07 Applicatis 1 Structure type P-2 Lateral compensator csisting of a PTFE bellows and rotating flanges with tie rods (outer restraints) to absorb reacti force from internal pressure PTFE bellows PN, / PN 9 / PN, Multiple cvoluti bellows made of PTFE Outer stabilizing rings of stainless steel between the cvolutis Self-sealing PTFE flared ends Inner surface repellent of foreign matter Material grade* PTFE Possible uses Structure type P-4 Lateral compensator csisting of a PTFE bellows and rotating flanges with tie rods (outer and inner restraints) to absorb reacti force from internal pressure or vacuum Aggressive acids and lyes, e.g. chloride, sulphate, solvents, bleaches, peroxide, fuels, gases *Check or inquire about the resistance of the rubber grade to temperature and medium Pressure rate Max. perm. operating pressure Vacuum Max. operating pressure to be set 0 % lower for shock loads. s Versi Rotating flanges with ears to carry tie rods Drilled with threaded holes Dimensis Standard: - (PN ) 0-00 (PN ) according to 01 Others:,, BS etc. Cnecti dimensis see technical annex Temperature PN, PN 9 PN, bar. bar 2. bar 1.7 bar 9.0 bar bar 4.0 bar 2. bar, bar 7 bar 4 bar bar up to + C up to +0 C up to + C up to +0 C 0.01 bar abs bar abs bar abs Materials Standard: 1.00 (RSt 7-2) Others: 1.441, Corrosi protecti Standard: electrogalvanized Others: hot-dip galvanized, special varnish, special coating, etc. for cveying aggressive media for compensating lateral movement for muffling vibrati and noise for reducing thermal and mechanical tensi to compensate for installati inaccuracies chemical industry treatment and disposal technology pharmaceutical industry Tie rod restraints Tie rods carried spherical washers and cical seats Materials Standard: tie rods. Others: stainless steel Corrosi protecti Standard: electrogalvanized Others: hot-dip galvanized Accessories Internal guide sleeve of PTFE Protective cover

14 0 P-2/-4/2-A07 Dimensis standard program Versis BL Pressure rate bar ø di Bellows inner ø ø C Raised face ø PN cnecti 01 ø D outer ø b thickness H height Movement compensati versi Larger sizes (), other lengths (BL), higher pressure rate, different movement compensati available Dimensis according to GR standard available. C Type P-2 Lateral PTFE compensator, with tie rods (outer restraints) carried spherical washers and cical seats lat Lateral movement Weight approx. kg Table values refer to + C and triple-cvoluted compensators Note Additial PTFE gaskets necessary for installati in glass, graphite or ceramic pipes. Please comply with the general technical instructis regarding reacti force, moving force, fixed point load, installati instructis etc. Subject to technical alteratis and deviatis resulting from the manufacturing process. Number of tie rods depending pressure Type P-4 Lateral PTFE compensator, design as type P-2, addial inner restraints, carried spherical washers and cical seats.