Emerson LR128 Manual de instrucciones descargar pdf (Pagina 5)

Type LR128

Table 1. Type LR128 Main Valve Body Sizes, End Connection Styles, Structural Design Ratings and Maximum Operating Inlet Pressures

(1)

MAIN VALVE

BODY SIZE

MAIN VALVE

BODY

MATERIAL

END CONNECTION STYLE

(2)

STRUCTURAL DESIGN

RATING

(3)

MAXIMUM OPERATING

RELIEF (INLET)

PRESSURE INCLUDING

BUILD-UP

(3)

MAXIMUM OPERATING

OUTLET PRESSURE

In. DN psig bar psig bar psig bar

1, 2,

3 and

25, 50,

80 and

100

WCC Steel

NPT or SWE (1 and 2 in. only) 1500 103 450 31.0 450 31.0

CL150 RF 290 20.0 290 20.0 290 20.0

CL300 RF 750 51.7

450 31.0 450 31.0CL600 RF 1500 103

PN 16/25/40 RF 580 40.0

CF8M

Stainless steel

NPT (1 and 2 in. only) 1440 99.2 450 31.0 450 31.0

CL150 RF 275 19.0 275 19.0 275 19.0

CL300 RF 720 49.6

450 31.0 450 31.0CL600 RF 1440 99.2

PN 16/25/40 RF 580 40.0

1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

2. Ratings and end connections for other than ASME standard can usually be provided. Contact your local Sales Ofce for assistance.

3. Maximum cold working pressure (CWP) per ASME B16.34 or product bulletin limit, whichever is lowest. Temperature may decrease these maximum pressures.

Table 2. Type MR98H Pilot Maximum Cold Working Pressure

(1)(2)

BODY SIZE

BODY AND SPRING

CASE MATERIAL

MAXIMUM INLET PRESSURE MAXIMUM OUTLET PRESSURE

1/2 NPT

Steel

Stainless steel

450 psig / 31.0 bar 450 psig / 31.0 bar

1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

2. Temperature and/or the body end connection may decrease these maximum pressures.

Table 3. Relief Set Pressure or Backpressure Control Ranges

WARNING

Liquid pressure control systems should

be designed using engineering practices

to eliminate quick control starting or

stopping of the ow stream, which can

produce water hammer.

The robust design of the Type LR128 allows this relief

valve or backpressure regulator to be installed indoors

or outdoors. Type LR128 is designed to withstand the

elements. The powder paint coating protects against

minor impacts, abrasions and corrosion. When installed

outdoors, the Type LR128 does not require protective

housing. However, the Type MR98H pilot should be

oriented so that the pilot spring case vent is pointed

down. Otherwise, make sure the vent is protected

so that rain, moisture, insects or any debris will not

accumulate inside or block the vent assembly.

When installed indoors, no remote venting is required

except on the pilot spring case. Refer to Step 8 of the

following procedure for the correct venting practices.

1. Only personnel qualied through training and

experience should install, operate and maintain

a relief valve or backpressure regulator. Before

installation, make sure that there is no damage

to or debris in the main valve body or pilot. Also,

make sure that all tubing and piping are clean

and unobstructed.

PILOT

SET PRESSURE RANGE SPRING WIRE DIAMETER SPRING FREE LENGTH

SPRING MATERIAL

SPRING PART NUMBER

AND COLOR

psig bar In. mm In. mm

Type

MR98H

25 to 75

70 to 140

130 to 200

150 to 375

(1)

1.7 to 5.2

4.8 to 9.7

9.0 to 13.8

10.3 to 25.9

(1)

0.234

0.283

0.331

0.394

5.94

7.19

8.41

10.0

2.595

2.44

2.250

5.063

65.9

62.0

57.2

129

Powder-coated steel

ERAA01910A0, Green

ERAA01911A0, Red

ERAA02889A0, Blue

1N943427142, Unpainted

1. 150 to 375 psig / 10.3 to 25.9 bar spring range is for the Type MR98HH pilot construction.

1 2 3 4 5 6 7 8 9 10 ... 27 28

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Emerson LR128 Manual de instrucciones Pagina 5

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