PLA & "PLAS" PNEUMATIC ACTUATORS FOR LINEAR VALVES

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1 PLA & "PLAS" PNEUMATIC ACTUATORS FOR LINEAR VALVES

2 PLA/PLAS Pneumatic actuator 2

3 PLA/PLAS Pneumatic Actuator Double Acting and Single Acting Pneumatic Linear Actuators for On-Off and regulating service!" $ flow control Features Electroless nickel plated and polished cylinder for corrosion resistance and minimum friction. Hard chromium plated and polished piston rod in stainless steel for corrosion resistance and minimum friction. Floating type piston rod seals and piston seals for low hysteresis and high sensitivity preventing sticking problems. Piston rod supported by bushing made of bronze with sintered TEFLON to provide minimal friction and extended service life Stroke adjustment with mechanical travel stop in one direction. The stroke adjustment for the opposite direction is made with the stem joint Factory totally enclosed spring cartridge, for single acting version, to prevent any damage to personnel during assembling or disassembling. Modular design which allows to transform the linear actuator, also in field, from spring to close action to spring to open action or viceversa, using the same pieces. Adapter spool in fabricated carbon steel, specifically designed for adaptation to any type of valve with provision for local indicator, limit switches and other accessories. Extensive range of accessories: - Jackscrew and hydraulic manual override - limit switches boxes, explosion proof, intrinsically - safe and/or water proof, in different types according to Customer requirements - Position transmitter, explosionproof, intrinsically safe and/or water proof - air filter and lubricator - air storage tanks available in accordance with different - Codes: ASME viii, div 1, EN, BS, TÜV,.. - Actuators for destinations within the European Community available with PED execution - Solenoid valves, explosionproof, intrinsically safe and/or waterproof. - Base actuators muscle will be marked ATEX CE as standard for destinations within the European Community - Quick exhaust valves - Pneumatic or electropneumatic positioner - Pneumatic or electropneumatic pressure switch. Terminals enclosures, pushbutton panels, explosionproof or intrinsically safe and/or waterproof. Special coating for offshore or corrosive environments. Technical Data Supply Pressure: 10.5 Bar Max. Supply medium: air, nitrogen or sweet gas Ambient Temp.: from -30 C to 100 C Applications Gate, Globe valves 3

4 PLA/PLAS Pneumatic actuator "PLA" Double Acting Linear Actuator "PLAS" Spring Return Linear Actuator 4

5 PLA/PLAS Pneumatic Actuator Biffi can provide a complete range of double acting and spring-return pneumatic linear actuators PLA and "PLAS". These actuators can use the same cylinders. The spring module can be mounted direct for "spring rto close" action or reversed for "spring to open" action. Due to the large range of combinations "thrust-stroke" required for the various applications (i.e. gate valve low pressure / high pressure, globe valve low pressure / high pressure, spring action), please contact the Factory in order to obtain the right actuator design for your application. Ordering Model designation (LEGEND) PLA 250k MHP Manual override Stroke (mm) Cylinder diameter (mm) Max. allowable thrust (N) Double acting actuator PLAS 250k k 300 CL MHW Manual override Spring action Stroke (mm) Spring ending thrust (N) Cylinder diameter (mm) Max. allowable thrust (N) Spring return actuator 5

6 PLA/PLAS Pneumatic actuator Manual Overrides Biffi provides a complete range of manual overrides for linear actuators "PLA" / "PLAS": Jackscrew manual override for double acting function -MSJ Derived from the "MSJ" used on "ALGA" quarter-turn actuators, it can be engaged by handlever. Jackscrew manual override for spring return function MHW Derived from "MHW" used on "ALGAS" actuators. For larges units an additional gear is also provided. 6

7 PLA/PLAS Pneumatic Actuator Hydraulic manual override for double acting function - MHP It includes anadditional hydraulic cylinder with pump / distributor. Hydraulic manual override for spring return function - MHP It includes anadditional hydraulic cylinder with pump / distributor. 7

8 PLA/PLAS Pneumatic actuator PLA-MHP 8

9 PLA/PLAS Pneumatic Actuator Sectional drawing PLA ITEM DESCRIPTION MATERIAL ITEM DESCRIPTION MATERIAL 1 Head flange Carbon steel 17 O-ring Nitrile rubber 2 Washer Carbon steel + 18 Piston rod Stainless steel Nitrile rubber 3 Screw Alloy steel 19 Bushing Steel + Bz + Teflon 4 Cylinder screw Nickel-plated 20 Scraper ring flange Alloy steel carbon steel 5 Tie rod Alloy steel 21 Stern valve joint Alloy steel 6 Screw Stainless steel 22 Pedestal Carbon steel 7 Piston Carbon steel 23 Nut Stainless steel 8 End flange Carbon steel 24 Stud bolt Alloy steel 9 O-ring PVC 25 Scraper ring NBR rubber 10 Adjusting screw Alloy steel 11 Adjusting screw cover Carbon steel 12 Eyebolt Carbon steel 13 Nut Carbon steel 14 O-ring Nitrile rubber 15 Guide sliding ring for piston Teflon + Graphite 16 O-ring Nitrile rubber 9

10 PLA/PLAS Pneumatic actuator Sectional drawing PLAS-CL 10

11 PLA/PLAS Pneumatic Actuator ITEM Q.ty DESCRIPTION MATERIAL 1 4 Nut Carbon steel 2 4 Stud bolt Alloy steel 3 1 Support joint Carbon steel 4 1 Index Carbon steel 5 1 Screw Stainless steel 6 1 Connecting joint Alloy steel 7 4 Screw Alloy steel 8 2 Bushing Fe + Bz + Teflon 9 2 Flange Carbon steel 10 1 Lower spring flange Carbon steel 11 4 Retainer ring Stainless steel 12 1 Piston rod Alloy steel 13 1 External tube Carbon steel 14 1 External spring Spring steel 15 1 Internal spring Spring steel 16 1 Piston rod guide tube Nitrided carbon steel 17 1 Upper spring flange Carbon steel 18 1 Head flange Carbon steel 19 4 Seal washer Carbon steel + NBR rubber 20 1 Cylinder tube Nickel-plated carbon steel 21 4 Screw Alloy steel 22 8 Screw Alloy steel 23 1 Connecting device Alloy steel 24 1 Piston Carbon steel 25 1 End flange Carbon steel 26 1 O-ring NBR rubber 27 1 Adjusting screw Alloy steel 28 1 Adjusting screw cover Nitrided carbon steel 29 1 Eyebolt Carbon steel 30 1 O-ring NBR rubber 31 2 O-ring NBR rubber 32 1 O-ring NBR rubber 33 1 Guide sliding piston ring Teflon + graphite 34 8 Nut Alloy steel 35 1 Exhaust silencer Stainless steel 36 1 Exhaust fitting Stainless steel 37 1 Fitting Stainless steel mt Pipe Stainless steel 39 1 Fitting Stainless steel 11

12 PLA/PLAS Pneumatic actuator Sectional drawing PLAS-OP 12

13 PLA/PLAS Pneumatic Actuator ITEM Q.ty DESCRIPTION MATERIAL 1 4 Nut Carbon steel 2 4 Stud bolt Alloy steel 3 1 Support joint Carbon steel 4 1 Index Carbon steel 5 1 Screw Stainless steel 6 1 Connecting joint Alloy steel 7 4 Screw Alloy steel 8 2 Bushing Fe + Bz + Teflon 9 2 Flange Carbon steel 10 1 Lower spring flange Carbon steel 11 4 Retainer ring Stainless steel 12 1 Piston rod Alloy steel 13 1 External tube Carbon steel 14 1 Spring Spring steel 15 1 Piston rod guide tube Nitrided carbon steel 16 1 Upper spring flange Carbon steel 17 1 Head flange Carbon steel 18 4 Seal washer Carbon steel + NBR rubber 19 1 Cylinder tube Nickel-plated carbon steel 20 4 Screw Alloy steel 21 8 Screw Alloy steel 22 1 Connecting device Alloy steel 23 1 Piston Carbon steel 24 1 End flange Carbon steel 25 1 O-ring NBR rubber 26 1 Adjusting screw Alloy steel 27 1 Adjusting screw cover Nitrided carbon steel 28 1 Eyebolt Carbon steel 29 1 O-ring NBR rubber 30 2 O-ring NBR rubber 31 1 O-ring NBR rubber 32 1 Guide sliding piston ring Teflon + graphite 33 1 Exhaust silencer Stainless steel 34 8 Nut Stainless steel 13

14 PLA/PLAS Pneumatic actuator PLAS with control panel 14

15 PLA/PLAS Pneumatic Actuator 15

16 Biffi Italia S.r.L. - Località Caselle S. Pietro Fiorenzuola d Arda (PC) - ITALY Tel (0523) Fax (0523) / / e_mail: biffi_italia@biffi.it

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