Samson 250 series Mounting And Operating Instructions
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Samson 250 series Mounting And Operating Instructions

Samson 250 series Mounting And Operating Instructions

Type 3252-1 and type 3252-7 pneumatic control valves
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Series 250
Type 3252‑1 and Type 3252‑7
Pneumatic Control Valves
Type 3252 High-pressure valve with Type 3277 Pneumatic Actuator and Type 3767 Electropneumatic
Positioner
Mounting and
Operating Instructions
EB 8053 EN
Edition June 2014

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  • Page 1 Series 250 Type 3252‑1 and Type 3252‑7 Pneumatic Control Valves Type 3252 High-pressure valve with Type 3277 Pneumatic Actuator and Type 3767 Electropneumatic Positioner Mounting and Operating Instructions EB 8053 EN Edition June 2014...
  • Page 2 Definition of signal words DANGER! NOTICE Hazardous situations which, if not Property damage message or mal- avoided, will result in death or seri- function ous injury Note:  WARNING! Additional information Hazardous situations which, if not avoided, could result in death or seri- Tip: ous injury Recommended action...

  • Page 3: Table Of Contents

    Contents General safety instructions ................5 Design and principle of operation ..............6 Fail-safe position ....................6 Replacing the actuator ..................6 Assembling and adjusting the valve and actuator ...........8 Reversal of the operating direction ..............9 Installation ....................9 Signal pressure line ..................9 Troubleshooting...................10 Removing the actuator from the valve ............10 Replacing the packing in standard valves ............10 1.2.1 Plug ......................11...
  • Page 4 EB 8053 EN...

  • Page 5: General Safety Instructions

    General safety instructions 1 General safety instructions For your own safety, follow these instructions concerning the mounting, start-up and opera- tion of the valve: − The valve is to be mounted, started up or operated only by trained and experienced per- sonnel familiar with the product.

  • Page 6: Design And Principle Of Operation

    The actuator are preloaded by SAMSON so that plug stem (6) is connected to the actuator the travel ranges match.
  • Page 7 Design and principle of operation Valve body Gasket Seat Spring Packing Washer Valve bonnet Guide bushing Threaded bushing Yoke Ring nut Screw Anti-rotation fixture Travel indicator scale Plug stem Stem connector nut Lock nut Stem connector Actuator stem Ring nut Springs Rolling diaphragm Signal pressure con-...

  • Page 8: Assembling And Adjusting The Valve And Actuator

    Assembling and adjusting the valve and actuator 3 Assembling and adjusting the 6. For fail-close actuators, apply a signal pressure that corresponds to the lower valve and actuator bench range value (e.g. 0.6 bar for a Proceed as follows if the original actuator is range between 0.6 and 1 bar) to the sig- to be replaced by an actuator of another nal pressure connection on the bottom...

  • Page 9: Reversal Of The Operating Direction

    Installation 3.1 Reversal of the operating 4 Installation direction The following applies concerning the instal- lation of the valve: The operating direction and fail-safe action of pneumatic actuators can be changed. Re- Î The valve can be mounted in any desired fer to the mounting and operating instruc- position.

  • Page 10: Troubleshooting

    When used at high tem- Note:  peratures, allow the plant section to Contact your nearest SAMSON sub- cool down to ambient temperature. sidiary or the SAMSON After-sales Service department for information on suitable lubricants.

  • Page 11: Plug

    Troubleshooting 5.2.1 Plug 4. Undo the threaded bushing (5.2). Pull the plug stem along with the plug out of the Î Proceed as described in section 5.2. valve bonnet. Replace the old plug with a new plug 5. Unscrew thread bushing (5.2) and push with plug stem.

  • Page 12: Replacement In Valve With Insulating Section Or Bellows Seal

    (12) the valve bonnet over the plug stem ex- as described in section 5.3.2. tension (12). 2. Unscrew the nut (14) using a SAMSON 5. Replace packing as described in sec- socket wrench (order no. 93252-0000- tion 5.2.
  • Page 13 Troubleshooting 11.1 Gasket Valve bonnet Threaded bushing 12.1 Yoke Ring nut Version Version with with bellows seal Screw insulating Anti-rotation fixture section Plug stem Stem connector nut Lock nut Intermediate piece 11.1 Gasket Plug stem extension 12.1 Washers Bellows seal Anti-rotation fixture Screw Fig. 2: Version with insulating section or bellows seal...

  • Page 14: Reassembly

    Troubleshooting 5.3.4 Reassembly 10. Mount the actuator and adjust the upper and lower bench range values as de- 1. After exchanging the plug, seat and met- scribed in section 3. al bellows, renew the gaskets (1.1 and 11.1) on the intermediate piece (11). 2.

  • Page 15: Appendix

    Please submit the following details: 6.1 Nameplate − Type designation and order number (stamped on the nameplate) − Version and nominal size of the valve SAMSON − Pressure and temperature of the process 3– medium − Flow rate in m³/h −...
  • Page 16 SAMSON AG · MESS- UND REGELTECHNIK Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 EB 8053 EN samson@samson.de · www.samson.de...

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