Mounting and operating instructions EB 8545 EN
Contents
1. a pressure reducing station or a filter to the connection block of Type 3766 Pneumatic and Type 3767 Electrop m 18 neumatic Positioners Supply air ro NPT o Output A2 2 LG NP V Output Al G NPT Type 3771 Build on block with Type 708 52 2 Pressur Regulator for Type 3772 Positioner Tt 118 E Hg Type 708 83 Filterand Type 708 84 Filte 2 Sone air Output A2 Q Output Sl Output al 2 Gla NPT 14 1 oe Build on block with Type Type 3771 708 56 2 Pressure Regu Build on block with Type 708 51 2 Pressur er oes 6 13 ane q Regulator for Type 3772 Positioner ype RES TL matic Converters 27 Supply air T Gu NPT Without With Manual Auto Selector Switch Type 708 85 0 Suppl Manual Auto eR Selector Switch K biii H Outpu 3a I Build on block with Type 708 55 2 2 Pressure Regulator for Type 4765 p t Pneumatic 4763 Electropneumatic 1264 45 Le fee Positioner optionally with Type 708 85 0 Manual Auto Selector Switch Solenoid valve y xo ie 5 9 HH x HE i s zep ar N Ps A 33 k H i gt Air connections Positioner G1 4NPT1 4 o rs E 60 Type 708 5422 Pressure2. Pressure Regulator and Pressure Reducing Station Type 708 Figure 1 Type 708 1020 Pressure Regulator Figure 2 panel mountin Type 708 1025 Pressure Regulator for Sy Figure 3 Type 708 112 Pressure Reducing Station with manometer 1 Design and principle of operation The pressure regulator supplies pneumatic measuring and control equipment with con stant auxiliary air This reduces the available compressed air pressure in the equipment max 12 bar to a adjustable minimum pressure between 0 to 1 6 bar or 0 5 to 6 bar Edition June 1997 In pressure reducing stations the pressure regulator is equipped with an upstream filter and a downstream manometer Pressure regulators designed as build on blocks can be directly attached to positioners In addition the pressure regulator can be combined with a manual automatic selector switch which blocks the positioner output signal Mounting and operating instructions EB 8545 EN Inlet Outlet 1 1 1 3 5 2 4 7 6 a 1 Compressed air filter 6 2 Pressure regulator 3 Filter element A Serrated lock washer 5 Filter casing 6 Drain plug 1 Casing 7 Screw gt 1 1 Seat 2 Cover Figure 5 Pressure reducing station 3 Plug 8 DNH 4 Diaphragm 5 Diaphragm plate 6 Spring depending on set point ra
3. Regul Pressure regulator tor for connecting aType 3701 ey e I 90 Solenoid valve or Type 4763 o 4765 Positione 105 83 Type 708 57 Pressure Regulator 161 attached to Type 3760 Positioner SAMSON AG MESS UND REGELTECHNIK Weismiillerstrafe 3 D 60314 Frankfurtam Main Postfach 10 19 01 D 60019 Frankfurt am Main Telephone 0 69 400 90 Telefax 0 69 4 00 95 07 EB 8545 EN
4. c operation push the piston back and screw on the cap 4 Maintenance It is recommended that the pressure reduction station figure 5 filter be checked as often a possible Let any fluid that may have collected flow out using the drain plug 6 When trouble shooting unscrew the filter casing and take out the filter insert after un screwing the fastening screw 7 Replace the filter insert after thorough clean ing in petrol and drying out If necessary replace the filter insert 20 um order number 8504 9027 Models with build on blocks have a filter situ ated in the casing inlet underneath a drain plug When trouble shooting disassemble and clean the filter and replace when necessary Order number 0559 0002 for 20 um filter 5 Dimensions in mm a3 2 T T cA a 11 12 5 2 117 Rotary knob Cover Supply 1 50 Output Supply X 1 air T T i GY l il fs FO G G NPT Qa NT HOANT 9Y Output Ly i NPT aa j 7 xt ae x 4 2 k 4 a oe ee 4o 40 0 for Type 3430 Controller Station G Double nipple for attachment of a press Type 708 00 Pressure Regulatorfor Type 708 10 Pressure Regula Type 708 11 12 Pressure Regulator for pipe mounting and Type 708 5003 tor for wall mounting pipe or wall mounting Input Output 597 ure regulator
5. lator adjuster 2 Installation The pressure regulator can be mounted in any position It can be mounted to pipes or with mounting brackets to panels walls or valves As pressure reducing station the filter casing with drain plug must be vertically installed The pressure reducing station should be mounted as close to the compressor or com pressed air reservoir as possible in order to avoid excessive trapping of water in long air lines The air connections are given in G or NPT thread sizes refer to dimensions chapter 5 Attention must be paid to the direction of flo at all times The direction of flow or inlet and outlet are indicated by arrows on the casing Assembly of the pressure regulator with build on block and positioner using special nuts and banjo bolts is illustrated in figure 6 The configuration is given in the respective dimensional drawings in chapter 5 3 Operation 3 1 Set point adjustment The desired output pressure is adjusted on the spindle 7 depending on the set point Right turn increases the output pressure and left turn decreases the output pressure Secure the adjustment with the lock nut 8 3 1 1 Manual control valve adjustment Only with the manual auto selector switch model Unscrew the drain plug 3 and remove the piston 2 the signal pressure to the actuator is now blocked Bring the connected valve into the desired po sition using the pressure regulator spindle For automati
6. nge 7 7 Spindle i 8 Locknut UU Figure 4 Pressure regulator 1 Casing 2 Nut 3 Screw 4 Gasket 5 Drain plug 1 Casing 2 Piston 3 Locking plug Figure 6 Pressure regulator Figure 7 Manual Auto selector switch with build on block Pressure regulator Fig 4 The air pressure available at the regulator input flows across the free area between the seat 1 1 and the plug 3 and leaves the outlet at a reduced pressure The output pressure is transmitted to the dia phragm 4 via a hole and produces an actu ating force that is balanced by the power of the spring 6 If the spring is compressed by turning the spindle 7 the diaphragm plate with dia phragm and plug moves upward As a result the free area between the seat and the plug becomes larger causing the output pressure to increase If the output pressure becomes too high or the set point is reduced by relieving the spring tension the diaphragm plate is lifted from the plug The excess pressure is reduced to the outside via the hole in the diaphragm plate until a new state of equilibrium is achieved The pressure regulator set point ranges of O to 1 6 bar and 0 5 to 6 bar are determined depending on the installed spring strength Pressure reducing station Fig 5 The supplied compressed air flows through a compressed air filter with a mesh size of 20 um If the air contains condensate this condensate flows off over the serra
7. ted lock washer 4 and splashes centrifugally against the filter walls The collected condensate ca then be drained via the drain plug 6 Pressure regulator with build on block Fig 6 The build on block allows a simple mecha ical and pneumatic connection between the pressure regulator and the various posi tioners For this purpose special nuts 2 are screwed into the associated tapped holes of the instru ments intended for attachment to the regula tor The build on block is then tightly secured to the instrument using the hollow bored M8 special screws 3 The screws serve as air ducts A gasket 4 on the casing seals the connec tion and the air duct is sealed by means of a drain plug 5 Manual auto selector switch Fig 7 With Type 4763 4765 or 3766 3767 Posi tioners the switch makes it possible to block off the positioner outlet and to manually actu ate the control valve via the pressure regula tor Automatic operation In normal position when the slide valve piston 2 is pushed in and the locking plug 3 is screwed on the signal pressure is connected to the actuator via the selector switch Manual operation In the manual position the piston 2 can be pulled out after the lock ing plug has been unscrewed Thus the actu ator signal pressure line is blocked and the pressure regulator output is directly con nected to the actuator The valve can be adjusted by manually turn ing the regu
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