Emerson EZH and EZHSO Series Pressure Reducing Regulators Bedienerhandbuch PDF herunterladen (Seite 5)

OS2 NACE

Body Aluminium Chromatation

Cover Aluminium Chromatation

Box

Position indicator Polycarbonate

Self-jamming ring Steel Phosphatation

Cover nut Stainless steel

Circlips Steel Phosphatation

All parts Stainless HR

Brackets Brass

Mechanism

Bolt Brass

Elastic O-ring Steel Phosphatation

Torsion spring Stainless steel

Traction spring Bronze

Yoke Self-jamming ring Steel Phosphatation

Flat EPDM

O-rings Cover Neoprene

Truarc ring Nitrile

Body Bronze

Control rod Stainless steel Chromium plating

Truarc ring Nitrile

Mechanism Box (BM)

Packing gland

MECHANISM BOX (BM) MATERIAL

COMMISSIONING (BM)

Commissioning differs depending on whether the assembly has an

internal or external bypass and whether overpressure releasing

is required or not. See corresponding technical manuals for further

details.

Note: The position of the travel stop (item. 7 drawing 6a)

depends on the type of assembly and it’s size.

Position A, B or C depending on max. travel of slam shut valve:

A = 15 mm travel, B = 35 mm travel, C = 50 mm travel.

• Mechanism box (BM) intervention

To access the box the cover must be removed. When unscrewing

the nut a circlips is used to remove the O-ring.

The cover is held on by one screw which can be unscrewed

manually or using a socket screw key (max. recommended

couple 2.5 N.m).

• Resetting

To reset the slam shut (after the fault has been settled), the 1

mechanism stage must be reset by manually turning the 1

stage

trigger. If the slam shut has an internal bypass the cam must be

slightly turned using a resetting key to bypass. If the slam shut has

an external bypass, a bypass valve will be used.

In both cases:

Wait for the pressure to be equalized before resetting the 2

mechanism stage.

When resetting the 2

mechanism stage (opening of the valve) a

reset key is used (delate).

Never use an extension pipe with the reset key when resetting

the 2

stage (max. normal couple 16 N.m, never go over 32 N.m).

CLOSED POSITION

TRAVEL STOP

N10

VALVE

8a – Release activation stages

RESET

DETECTION STAGE

VALVE

TRAVEL STOP

N11

RESET

POWER STAGE

VALVE

TRAVEL STOP

N12

WARNING

AUTHORIZED PERSONNEL ONLY

Risk of injury

After rearming, remove the reset key from the stem.

Do not put fingers in or near the reset mechanism area.

! !

Europe, Middle East, and Africa Document Only

1 2 3 4 5 6 7 8 9 10 11 12

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