Emerson Fisher YD & YS Manuel d'instructions télécharger pdf (Page 10)

Instruction Manual

D100425X012

YD and YS Valves

October 2014

Figure 6. PTFE Packing Arrangements for Use in Fisher ENVIRO-SEAL Bellows Seal Bonnets

UPPER WIPER

(KEY 12)

PACKING SET: (KEY 6)

FEMALE ADAPTOR

PACKING RING

MALE ADAPTOR

BUSHING (KEY 13)

9.5 mm

(3/8 INCH)

STEM

12.7 mm

(1/2 INCH)

STEM

DOUBLE ARRANGEMENTS

9.5 mm

(3/8 INCH)

STEM

9.5 mm

(3/8 INCH)

STEM

12.7 mm

(1/2 INCH)

STEM FOR

NPS 2 VALVES

12.7 mm

(1/2 INCH)

STEM FOR

NPS 3 AND 4 VAL VES

THRUST

RING

(KEY 39)

SPRING

(KEY 8)

THRUST

RING

(KEY 39)

THRUST

RING

(KEY 39)

BUSHING

(KEY 13)

BUSHING

(KEY 13)

SPACER

(KEY 8)

SPACER

(KEY 8)

SPACER

(KEY 8)

12.7 mm

(1/2 INCH)

STEM

SINGLE ARRANGEMENTS

FOR S31600 (316 SST)

PACKING BOX PARTS

FOR ALL PACKING BOX

MATERIALS EXCEPT S31600

UPPER WIPER

(KEY 12)

PACKING SET: (KEY 6)

FEMALE ADAPTOR

PACKING RING

MALE ADAPTOR

BUSHING (KEY 13)

SPACER

(KEY 8)

A5863

12B4183-A 18A0906-D 18A5338-A

12B4182-A SHT 1 12B4185-A SHT 1 12B4182-A SHT 2

12B4185-A SHT 2

3. Removethenuts(key16,figures9and10)orcapscrewsfromthebonnetflange.

4. Lift off the bonnet along with the valve plug and stem (keys 2 and 5, figures 9 and 10). Due to the design of the

valve, several other trim parts will be drawn out with the valve plug. They are as follows:

YD (Standard)--The upper cage (key 3A) and associated seals, gaskets, and shim (keys 9, 11, 19, 20A, 20B, and 22).

YD (High Temperature)--The upper cage (key 3B) and associated gaskets and shim (keys 9, 11, and 22).

YS--The upper seat (key 7), upper cage (key 3), and associated gaskets and shim (keys 9, 11, and 22).

CAUTION

The exposed portion of the cage provides a guiding surface that must not be damaged during disassembly or maintenance.

Damage could affect valve performance. If the cage is stuck in t he valve, use a rubber mallet to strike the exposed portion

at several points around the circumference.

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Emerson Fisher YD & YS Manuel d'instructions Page 10

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