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Bulletin 71.2:LR125

MAIN VALVE BODY SIZE

MAIN VALVE

BODY MATERIAL

END CONNECTION STYLE

(2)

STRUCTURAL DESIGN

RATING

(3)

MAXIMUM OPERATING

INLET PRESSURE

(3)

In. DN psig bar psig bar

1, 2, 3 and 4 25, 50, 80 and 100

WCC Steel

NPT or SWE

(1 and 2 in. only)

1500 103 300 20.7

CL150 RF 290 20.0 290 20.0

CL300 RF 750 51.7

300 20.7

CL600 RF 1500 103

PN 16/25/40 RF

(4)

580 40.0

CF8M Stainless steel

NPT

(1 and 2 in. only)

1440 99.2 300 20.7

CL150 RF 275 19.0 275 19.0

CL300 RF 720 49.6

300 20.7CL600 RF 1440 99.2

PN 16/25/40 RF

(4)

580 40.0

1. The pressure/temperature limits in this Bulletin 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.

4. Not available for 4 in. / DN 100 body size.

Table 1. Type LR125 Main Valve Body Sizes, End Connection Styles, Structural Design Ratings and Maximum Operating

Inlet Pressures

(1)

Installation

The robust design of the Type LR125 allows this regulator

to be installed indoors or outdoors. This regulator

is designed to withstand the elements. The powder

paint coating protects regulator against minor impacts,

abrasions and corrosion. When installed outdoors,

the Type LR125 does not require protective housing.

However, the Type MR95H 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, install remote

venting of the pilot spring case as required by applicable

codes and regulations.

Table 3. Outlet (Control) Pressure Ranges

PILOT

OUTLET PRESSURE RANGE SPRING WIRE DIAMETER SPRING FREE LENGTH

SPRING PART NUMBER

AND COLOR

psig bar In. mm In. mm

Type MR95H

15 to 30

25 to 75

70 to 150

1.0 to 2.1

1.7 to 5.2

4.8 to 10.3

0.207

0.234

0.283

5.26

5.94

7.19

2.50

2.60

2.44

63.5

65.9

62.0

ERCA04288A0 Yellow

ERAA01910A0 Green

ERAA01911A0 Red

Table 2. Type MR95H Pilot Maximum Cold Working Pressure

(1)(2)

17E68 NITRILE (NBR) 17E97 NITRILE (NBR) 17E88 FLUOROCARBON (FKM)

Liquid Temperature -20 to 150°F / -29 to 66°C 0 to 150°F / -18 to 66°C 0 to 250°F / -18 to 121°C

(1)

General Applications

Best for low pressure

differential and cold temperature

service applications.

Best for abrasive or

erosive service applications.

Best for high temperature

applications.

Heavy Particle Erosion Fair Excellent Good

1. Fluorocarbon (FKM) is limited to 200°F / 93°C in hot water.

Table 4. Diaphragm Material Selection Information

BODY SIZE BODY AND SPRING CASE MATERIAL MAXIMUM INLET PRESSURE MAXIMUM OUTLET PRESSURE

1/2 NPT

Steel

Stainless steel

300 psig / 20.7 bar

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

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

Overpressure Protection

Overpressuring any portion of a regulator or associated

equipment may cause personal injury, leakage

or property damage due to bursting of pressure-

containing parts. Provide appropriate pressure relieving

or pressure limiting devices to ensure that the limits in

the Specications section are not exceeded. Common

methods of external overpressure protection include

relief valves, monitoring regulators, shutoff devices

and series regulation. Regulator operation within

ratings does not prevent the possibility of damage from

external sources or from debris in the pipeline. Install

additional strainer or lter upstream of the regulator for

applications with high levels of debris.

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

Bulletin 71.2:LR125 1

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