Samson 2357-11, 2357-21 Mounting And Operating Instructions

Self-operated Pressure Regulators

Type 2357-11 Pressure Build-up Regulator
Type 2357-21 Excess Pressure Valve

Type2357-11 Pressure Build-up Regulator/Type 2357-21 Excess Pressure Valve

Mounting and
Operating Instructions

EB 2560 EN

Edition August 2014

Denition of signal words



DANGER!

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

WARNING!

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

2 EB 2560 EN

-

-

NOTICE

Property damage message or mal­function

Note:

Additional information

Tip:

Recommended action

Contents

1 General safety instructions .............................................................................4

2 Process medium and scope of application .......................................................5

2.1 Transportation and storage .............................................................................5

3 Design and principle of operation ..................................................................6

4 Installation ....................................................................................................8

4.1 Mounting position ..........................................................................................8

4.2 Shut-off valve .................................................................................................8

5 Operation .....................................................................................................8

5.1 Start-up .........................................................................................................8

5.2 Set point adjustment .......................................................................................8

5.2.1 Changing the set point range ..........................................................................9

5.3 Decommissioning .........................................................................................10

6 Maintenance ...............................................................................................10

6.1 Exchanging the seat and plug .......................................................................10

6.2 Exchanging the non-return unit .....................................................................11

7 Customer service .........................................................................................12

8 Nameplate ..................................................................................................12

9 Dimensions and weights ..............................................................................13

10 Technical data .............................................................................................14

EB 2560 EN 3

General safety instructions

1 General safety instructions

− The regulators are to be mounted, started up or serviced by fully trained and

qualied personnel only; the accepted industry codes and practices are to

be observed. Make sure employees or third persons are not exposed to any
danger.

− All safety instructions and warnings given in these mounting and operating
instructions, particularly those concerning installation, start-up and mainte­nance, must be strictly observed.

− According to these mounting and operating instructions, trained person-
nel refers to individuals 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.

− The regulators comply with the requirements of the European Pressure Equip-
ment Directive 97/23/EC. The declaration of conformity issued for a regula­tor bearing the CE marking includes information on the applied conformity
assessment procedure. The declaration of conformity is available on request.

− To ensure appropriate use, only use the regulator in applications where the

operating pressure and temperatures do not exceed the specications used

for sizing the regulator at the ordering stage.

− The manufacturer does not assume any responsibility for damage caused by
external forces or any other external factors.

− Any hazards that could be caused in the pressure regulator by the process
medium, operating pressure or by moving parts are to be prevented by tak­ing appropriate precautions.

− Proper transport, storage, installation, operation and maintenance are as-
sumed.

4 EB 2560 EN

Process medium and scope of application

2 Process medium and scope of application

Pressure regulators for cryogenic gases and liquids as well as other liquids, gases and va-

pors. Operating pressures up to 63bar, with set points from 1 to 40bar. Temperature range
from –200 to +200°C. Oxygen clean according to international standards and guidelines.

The regulators are designed to keep the pressure constant to the adjusted set point, especial­ly in cryogenic plants.

WARNING!

Risk of injury and property damage due to high pressure in the plant!
A suitable overpressure protection must be installed on site in the plant section.

2.1 Transportation and storage

The regulators must be carefully handled, transported and stored. Protect the regulators

against adverse inuences, such as dust, dirt or moisture before they are installed.

In the delivered state, the pressure regulators are packed to be free of oil and grease for oxy­gen service. To avoid contamination, do not open the packaging until immediately before in­stallation.

EB 2560 EN 5