Type 4708 Supply Pressure Regulator

Transcription

1 Type 478 Pressure Regulator Application pressure regulators used to provide pneumatic measuring and control equipment with a constant air supply Set point ranges. to. bar ( to 4 psi). to bar (8 to 9 psi) The supply pressure regulator reduces and controls the maximum pressure of bar (8 psi) in a compressed air network to the pressure adjusted at the set point adjuster. The regulators have a filter which can be vented: Type including filter with µm All other Type 478 including filter with μm Special version with μm Special features: Air blow-off and low air consumption Almost independent of upstream pressure Any mounting position (except version with filter receptacle) Suitable for pipe and panel mounting as well as for attachment to various positioners and actuators Optionally with pressure gauge with CrNiMo steel housing and brass measuring element or pressure gauge completely made of CrNiMo steel (these regulator versions are completely free of any copper alloy) Threaded ends G according to DIN ISO 8/ or with NPT tapered pipe thread Versions pressure regulators with continuously adjustable set point range from. to bar (8 to 9 psi) Types 478- to -7 (Fig., ) pressure regulators with optional set point range. to. bar ( to psi) Mounted on rails conforming with DIN EN / with accessories or mounted using a universal bracket Type (Fig. ) pressure regulator with increased air capacity Types 478- to -8 (Fig. 7 onwards) pressure regulators for direct attachment to various positioners Types 478- and -4 (Fig., 9) pressure regulators for direct attachment to Type 77 and Type 7 Pneumatic Actuators Further versions Type (Fig., 4) Manual/automatic switchover functioning as a pneumatic bypass for positioners Type to -87 (Fig. ) Compressed air filters Further information u EB 84 EN for Type 478-xx u EB 84- EN for Type Fig. : Types 478-, - and - Pressure Regulators with aluminum body Fig. : Types 478-7, -4 and - Pressure Regulators, versions with stainless steel body Fig. : Type Pressure Regulator Associated Information Sheet T 8 EN Edition February Data Sheet T 84 EN

2 Principle of operation (Fig. 4) The Type 478 Pressure Regulator operates according to the force-balance principle. By turning the set point screw (7), the tension of the spring () is changed and the output pressure is adjusted accordingly. The set point ranges from. to. bar or from. to bar are obtained by using two different springs. The supply pressure regulator contains a filter cartridge (). To drain the condensate, open the screw plug () by half a turn. When mounting the regulator, make sure the screw plug is in a horizontal or suspended position. For versions with separate filter receptacle and condensate drainage, the regulator must be installed with the receptacle suspended. pressure regulators combined with pneumatic or electropneumatic devices (Fig. 7 onwards) Various adapter plates allow the supply pressure regulator to be attached to the various devices. Note: If the regulator is connected to supply networks with air containing dust, oil or condensate, we recommend using SAMSOMATIC service units for compressed air treatment Fig. 4: Sectional view of Type 478 Pressure Regulator. Installation To avoid the formation of excessive condensate, make sure the supply pressure regulator is installed as closely as possible to the compressor or the compressed air tank. The regulator is either mounted directly in the pipeline or into the appropriate panel cut-out. In addition, it may be attached directly to the positioner or the pneumatic actuator. Depending on the version used, the air connections are fitted with either G ¼ or ¼-8 NPT (G ½ or ½-4 NPT threads for Type 478-4). Manual/automatic switchover The output of a positioner is routed to the actuator over a manual/automatic switchover (Fig. ). In automatic mode, the positioner output is used and in manual mode, the output pressure of the supply pressure regulator is routed directly to the actuator. This feature provides a manual bypass for the positioner. The manual/automatic switchover is suitable for mounting on Types 7x, 78x and 7x Positioners or for mounting on an adapter plate connected up to the actuator. Type 478- (Fig. ) or Type can be directly connected to the manual/automatic switchover. All other supply pressure regulators are connected over piping. Fig. : View of diverting gasket () and adjustment knob () Accessories A supplementary filter (Fig. ) can be fitted on Type 478- and Types 478- to -. The filter housing can be rotated to ensure that the filter and condensate drainage always face downwards. Legend for Figs. 4 and Body. Seat. Plug. Connecting bore Plate. Diaphragm Cover. Venting bore 4 Centering bushing Cap Spring 7 Set point screw 8 Lock nut Diverting gasket Filter cartridge Screw plug Fastening screw Spring washer Adjustment knob Fig. : Manual/automatic switchover with Type 478- Pressure Regulator with pressure gauges and filter receptacle T 84 EN

3 Positioner For actuator Associated supply pressure regulator Type 7 Type 77 cm² and 4 to 7 cm² with hooked-up accessories (solenoid valve, Type 79- Lock-up Valve) also with Type or with Type 79- Fig. 7: Type 478-xx Type 7 Type 7 Type 7x Type 78x Rotary actuators also with Type (not with Type 79-) Fig. 8: Type 478-4xx Type 77 4 to 7 cm² without any hooked-up accessories and without manual/automatic switchover Type (mounting block and pressure gauge are included in the scope of positioner delivery) Fig. 9: Type 478-4xx Type 7 Type 77 to cm² Fig. : Type 478-7xx Type 7 Rotary actuators Fig. : Type 478-8xx Type 47 Type 47 Type 7 Fig. : Type 478-xx Version for integral attachment Type 7-xx for Series V valves Fig. : Type 478-xx T 84 EN

4 Universal supply pressure regulators and filters Type Manual/automatic switchover Fig. 4: Type Filter with filter receptacle for universal attachment with piping Fig. : Type 478-8xxx shown here: -8, -87 Accessories Rotating supplementary filter for mounting on supply pressure regulators Fig. : Filter for Type 478- and Types 478- to 478- Set point Adjustment ranges..... bar P [bar]..... bar [m n /h] Q Fig. 7: Air flow characteristics with 8 bar supply pressure for Type 478-xx Pressure Regulators (measured with ¼ connection) Set point Adjustment ranges P [bar]..... bar 4 Q [m n /h] Fig. 8: Air flow characteristics with 8 bar supply pressure for Type Pressure Regulators (measured with ½ connection) 4 T 84 EN

5 Table : Technical data ) pressure regulators Type 478-xx Type pressure Set point range Max. supply pressure Air consumption at 7 bar supply pressure bar ( psi) above the adjusted set point, however, at least. bar (4 psi). m n ³/h bar (8 psi). to. bar ( to 4 psi) or. to bar (8 to 9 psi) At least bar ( psi) above the adjusted set point. m n ³/h Dependency on inlet pressure <. bar/δp = bar Negligible (< mbar/4 bar) Reversing error Hysteresis. to.4 bar (depending on set point) <. bar mbar with set point range. to bar (8 to 9 psi) mbar with set point range. to bar (8 to 9 psi) Filter cartridge mesh size µm Optionally µm µm Pressure gauge Reading range to. bar ( to 4 psi) or to bar ( to 9 psi) Connection G /8 Ambient temperature ranges pressure regulators Type Standard to 7 C ) Version for low temperatures to 8 C 4 to 8 C to 7 C ) to 8 C Weights pressure regulators Type ) kg (approx.) ) Values measured for Type 478-xx with ¼ connection and for Type with ½ connection ) Applies also to rotating supplementary filter ) With aluminum body and polyamide filter receptacle Table : Materials pressure regulators Type 478-xx Type Body Metal parts Aluminum (.47) or stainless steel (.444) Cover Cap Plastic parts Polyamide, glass fiber reinforced Polyamide, glass fiber reinforced Polyamide, glass fiber reinforced Plug Polyamide, glass fiber reinforced and polyoxymethylene.4 and polyoxymethylene Diaphragm Diaphragm plate NBR FVMQ for low-temperature version Polyamide, glass fiber reinforced, or aluminum Set point spring.4 Filter receptacle UV-resistant polyamide (Trogamid T4) Filter cartridge μm: Polypropylene μm: Stainless steel μm: Polypropylene and polyethylene Pressure gauge Housing Connection and measuring element Stainless steel Nickel-plated brass or stainless steel for copper-free version T 84 EN

6 Dimensions in mm Specifications in parentheses apply to additional compressed air connection (Fig. ) 8 (89) 4 Fig. 9: (photo: Fig. 7) Type 478- xx Pressure Regulator attached to Type 7x, 78x or 7x Positioner 7. 7 Output Output 9 Fig. : (photo: Fig. 8) Type 478-4xx Pressure Regulator attached to Type 7x, 78x or 7x Positioner Fig. : (photo: Fig. ) Type 478- xx Pressure Regulator attached to Type 47 or Type 47 Positioner Output (9) Fig. : (photo: Fig. ) Type 478-7xx Pressure Regulator attached to Type 7 Positioner Input Signal (for pneumatic positioners) (7) T 84 EN

7 4 S Input 7 Output Output G 8 8 Fig. : (photo: Fig. ) Type 478-8xx Pressure Regulator attached to Type 7 Positioner 9 (84) 79 Fig. 4: (photo: Fig. 9) Type 478-4xx Pressure Regulator for Type 77 Pneumatic Actuator and Type 7x, 78x or 7x Positioner G/ Output Ø Output Ø4 7 8 Fig. : (photo: Fig., ) Type 478-xx/-xx Pressure Regulator Fig. : (photo: Fig. ) Type Pressure Regulator T 84 EN 7

8 X G 8 () Output 44 Fig. 7: (photo Fig., ) Type 478-xx/4xx Pressure Regulator 9 () () Output 44 Fig. 8: (photo: Fig. ) Type 478-xx Pressure Regulator for Type 7 Pneumatic Actuator Fig. 9: (photo Fig., ) Type 478-xx/-7xx Pressure Regulator 8 T 84 EN

9 Ø8 Fig. : (photo: Fig. ) Type 478-8xx/-84xx/-8xx/-87xx Filter Fig. : (photo: Fig. ) Rotating filter receptacle Fig. : Intermediate plate for additional compressed air shown here: Type 478-xx Fig. : (photo: Fig. ) Type Manual/automatic Switchover with adapter plate Ordering text pressure regulator According to article code Accessories For Type 478- to -4 as well as Type to 87: Mounting parts for valve attachment or DIN rails acc. to EN or DIN rails acc. to EN For Type 478-, -, -4, -7, -, -, -7, -8: Intermediate plate for additional compressed air output (G ¼ or ¼ NPT) For Type 478- and Type 478- to -4: Rotating filter receptacle For Type 478-8: Adapter plate for freely configurable hookup or NAMUR attachment (G ¼ or ¼ NPT) T 84 EN 9

10 Article code pressure regulators Type 478- x x x x x x x x x x Standard version Aluminum filter without filter receptacle with plastic filter receptacle with aluminum filter receptacle Stainless steel version Stainless steel filter with stainless steel filter receptacle 4 with plastic filter receptacle 4 without filter receptacle 7 Version with increased air capacity Aluminum or stainless steel body, transparent plastic, aluminum or stainless steel filter receptacle pressure regulator with adapter plate for positioner Type 7, 7, 77, 78, 78, 787 Type 7, 7, 77, 78, 78, Type 47/47 Type 7 7 Type 7 8 pressure regulator with adapter plate for pneumatic actuator Type 77 Actuator (4 to 7 cm²) with Type 7, 7, 77, 78, 78 or 787 Positioner, Type 7 Actuator Type 77 Actuator with connection block 4 Manual/automatic switchover Bypass for positioner 8 8 Filter without pressure gauge Aluminum body and plastic filter receptacle 8 8 Aluminum body and aluminum filter receptacle Stainless steel body and plastic filter receptacle 8 8 Stainless steel body and stainless steel filter receptacle T 84 EN

11 pressure regulators Type 478- x x x x x x x x x x Connecting thread ISO-8/ - G ¼ ¼-8 NPT ISO-8/ - G ½ ½-4 NPT 7 Set point range. to. bar, without pressure gauge. to. bar, with pressure gauge completely of CrNiMo steel (device free of copper). to. bar, with pressure gauge, (nickel-plated brass connection). to. bar, without pressure gauge. to. bar, with pressure gauge completely of CrNiMo steel (device free of copper) 4. to. bar, with pressure gauge, (nickel-plated brass connection) Without 8 No. of pressure gauges Without One pressure gauge Two pressure gauges Body material Aluminum Stainless steel Filter Without in black plastic regulator body in transparent plastic receptacle (cannot be aligned) in aluminum receptacle (cannot be aligned) in stainless steel receptacle (cannot be aligned) 4 Temperature range to 7 C (standard) 4 to 7 C 4 to 7 C Application Standard Free of substances that impair paint adhesion Exhaust port with thread 4 Special version Without Filter cartridge, μm mesh width T 84 EN

12 Specifications subject to change without notice SAMSON AG MESS- UND REGELTECHNIK Weismüllerstraße 4 Frankfurt am Main, Germany Phone: Fax: samson@samson.de T 84 EN English