Samson 250 series Mounting And Operating Instructions

Mounting and
Operating Instructions

EB 8053 EN

Edition June 2014

Type 3252 High-pressure valve with Type3277 Pneumatic Actuator and Type3767 Electropneumatic
Positioner

Series 250

Type3252‑1 and Type3252‑7

Pneumatic Control Valves

Denition of signal words

DANGER!

Hazardous situations which, if not
avoided, will result in death or seri­ous injury

WARNING!

Hazardous situations which, if not
avoided, could result in death or seri­ous injury

NOTICE

Property damage message or mal­function

Note:

Additional information

Tip:

Recommended action



2 EB 8053 EN

Contents

EB 8053 EN 3

1 General safety instructions .............................................................................5

2 Design and principle of operation ..................................................................6

1.1 Fail-safe position ............................................................................................6

1.2 Replacing the actuator ....................................................................................6

3 Assembling and adjusting the valve and actuator ...........................................8

1.1 Reversal of the operating direction ..................................................................9

4 Installation ....................................................................................................9

1.2 Signal pressure line ........................................................................................9

5 Troubleshooting...........................................................................................10

1.1 Removing the actuator from the valve ............................................................10

1.2 Replacing the packing in standard valves .......................................................10

1.2.1 Plug ............................................................................................................11

1.2.2 Seat ............................................................................................................11

1.1 Replacement in valve with insulating section or bellows seal ............................12

1.1.1 Packing .......................................................................................................12

1.1.2 Plug ............................................................................................................12

1.1.3 Metal bellows ..............................................................................................12

1.1.1 Reassembly .................................................................................................14

6 Appendix ....................................................................................................15

1.1 Nameplate ..................................................................................................15

1.2 Customer inquiries .......................................................................................15

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EB 8053 EN 5

General safety instructions

1 General safety instructions

For your own safety, follow these instructions concerning the mounting, start-up and opera­tion of the valve:

− The valve is to be mounted, started up or operated only by trained and experienced per-
sonnel familiar with the product.

− According to these mounting and operating instructions, trained personnel refers to indi-
viduals who are able to judge the work they are assigned to and recognize possible dan­gers due to their specialized training, their knowledge and experience as well as their
knowledge of the applicable standards.

− Any hazards that could be caused in the valve by the process medium, the signal pres-
sure or by moving parts are to be prevented by taking appropriate precautions.

− To ensure appropriate use, only use the valve in applications where the operating pres-
sure and temperatures do not exceed the specications used for sizing the valve at the or­dering stage.

To avoid damage to any equipment, the following also applies:

− Proper shipping and storage are assumed.