Emerson EZR Series Pressure Reducing Regulator Manual de instrucciones descargar pdf (Pagina 10)

EZR

MAINTENANCE

DISASSEMBLY

Recommended frequency:

Every 2 to 6 years (or less depending on operating conditions)

Verification:

Condition of O-rings, diaphragms, lubrication

Replacement:

O-rings, diaphragm

Tools:

Dimensions according to tables below

PRELIMINARY OPERATIONS

• Valve plug closed

• Inlet and outlet valves closed

• Bleed off outlet pressure

• Bleed off inlet pressure

• Unscrew the pilot impulse connection

• Unscrew the screws 1 fixing the bonnet 2

• Remove the bonnet 2

• Remove the diaphragm/plug assembly 3

• Remove the slotted cage 4, the O-ring 5, the strainer 6

(or the space washer 6)

• Clean parts and replace them if necessary

PILOT

• Unscrew the manometric box screws

• Remove the diaphragm

SLAM SHUT (Version with slam shut)

• Unscrew the BMS impulse line connector (IS)

• Remove the BM cover 7

• Unscrew the BM fixing screw 8

• Remove the holding pin 10

• Remove the BM 9

• Unscrew the screws 11 from the connecting part 12

• Remove the connecting part 12

• Remove the spring 13 and the valve plug 14

• Unscrew the bypass 15

• Unscrew the screws CHC 16 (DN 100 and 150)

Removing the orifice 17 (not recommended) requires a special extraction tool

REASSEMBLY

• Perform the above operations in reverse order (respect tightening torques)

• Replace the O-rings and diaphragm at each disassembly

SLAM SHUT REASSEMBLY (Version with slam shut)

• The valve plug should be held in an upper position using a packing

gland and a box to facilitate reassembly

• Precaution must be taken concerning the passage of the valve plug

over the segments

• Lubricate screws before tightening

• Lightly lubricate the O-rings (silicone grease) except for the valve

plug O-ring

• Lightly lubricate the stem (silicone grease)

• Lubricate the release relay mechanism (yoke and bolt)

(molybdenum graphite grease)

• Lubricate the BMS spring (molybdenum graphite grease)

• A special tool is required for reassembling a new orifice

B24

Body DN

Screws

Spanner

Items 1 and 11

(inches)

25 (1'') 9/16 - 12 x 1 3/4 13/16

50 (2'') 1/2 - 13 x 1 1/2 3/4

80 (3'') 5/8 - 11 x 1 3/4 15/16

100 (4'') 3/4 - 10 x 2 1/4 1 1/8

150 (6'') 1 - 8 x 2 3/4 1 1/2

B25a

Torque N.m.

Body DN Screw Fixation Connector Bypass

Item 1 & 11 Item 18 Item 19 Item 15

25 (1'') 110 8 130 14

50 (2'') 110 9 130 14

80 (3'') 175 28 280 20

100 (4'') 260 28 280 24

150 (6'') 510 70 410 24

B25b

Europe, Middle East, and Africa Document Only

1 2 ... 5 6 7 8 9 10 11

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Emerson EZR Series Pressure Reducing Regulator Manual de instrucciones Pagina 10

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