Emerson MR105 Manuale delle Istruzioni Scaricare il pdf (Pagina 3)

Type MR105

Table 2. Outlet Pressure Range



Actuator Type

Spring Range

Spring Part

Number

Spring Color

Code

Spring Wire Diameter Spring Free Length

Maximum Pressure Over

Setpoint to Avoid Internal

Parts Damage

psig bar In. mm In. mm psig bar

Low Pressure

5 to 12 0.34 to 0.83 GE42909X012 White 0.437 11.1

9.70 246

20 1.4

10 to 24 0.69 to 1.6 GE42910X012 Silver 0.500 12.7

14 to 32 0.96 to 2.2 GE42911X012 Orange 0.562 14.3

18 to 43 1.2 to 3.0 GE43002X012 Red 0.625 15.9

High Pressure

25 to 60

(1)

1.7 to 4.1

(1)

GE42907X012 Green 0.375 9.52

120 8.3

43 to 100 3.0 to 6.9 GE42909X012 White 0.437 11.1

75 to 175

(2)

5.2 to 12.1

(2)

GE42910X012 Silver 0.500 12.7

110 to 300

(2)

7.6 to 20.7

(2)

GE42911X012 Orange 0.562 14.3



Actuator Type

Spring Range

Spring Part

Number

Spring Color

Code

Spring Wire Diameter Spring Free Length

Maximum Pressure Over

Setpoint to Avoid Internal

Parts Damage

psig bar In. mm In. mm psig bar

Low Pressure

5 to 8 0.34 to 0.55 GE42909X012 White 0.437 11.1

9.70 246

20 1.4

8 to 20 0.55 to 1.4 GE42910X012 Silver 0.500 12.7

12 to 30 0.83 to 2.1 GE42911X012 Orange 0.562 14.3

18 to 39 1.2 to 2.7 GE43002X012 Red 0.625 15.9

High Pressure

39 to 72 2.7 to 5.0 GE42909X012 White 0.437 11.1

120 8.3

71 to 175

(2)

4.9 to 12.1

(2)

GE42910X012 Silver 0.500 12.7

110 to 250

(2)

7.6 to 17.2

(2)

GE42911X012 Orange 0.562 14.3

1. NPS 2 / DN 50 body size spring range is limited to 45 psig / 3.1 bar.

2. Maximum setpoint is limited to 150 psig / 10.3 bar for constructions with Fluorocarbon (FKM) diaphragm.

BODY MATERIAL

END CONNECTION STYLE

Body Size

 

Cast Iron NPT, CL125 FF or CL250 RF CL125 FF or CL250 RF

WCC Steel

(1)(2)

NPT, CL150 RF, CL300 RF, CL600 RF

or PN 16/25/40 RF

CL150 RF, CL300 RF, CL600 RF

or PN 16 RF

CF8M Stainless Steel

(1)(2)

NPT, CL150 RF, CL300 RF, CL600 RF

or PN 16/25/40 RF

CL150 RF, CL300 RF, CL600 RF

or PN 16 RF

CF3M Stainless Steel

(1)(2)

NPT, CL150 RF, CL300 RF, CL600 RF

or PN 16/25/40 RF

CL150 RF, CL300 RF, CL600 RF

or PN 16 RF

1. Optional NACE construction available.

2. Constructions meet API 614 requirements.

Table 1. Body Size and End Connection Style

27.6 bar and temperatures up to 250°F / 121°C. Large

multi-purpose regulators provide fast, simple, reliable and

economical pressure control for a number of applications

and are suitable for different ow media such as liquid, air

and gas. In addition, the drain valve option allows you to

drain the system without expensive spool pieces saving

you time and space. Also, the bleed valve option allows

you to purge the air trapped underneath the diaphragm

when the high-pressure regulator is installed in the upright

position. Typical applications include lube oil, cooling

water and natural gas district stations.

WARNING



valve may result in regulator damage,

personal injury and property damage.

To avoid such injury and damage, make

certain the bleed valve (if used) is properly

closed after venting air or equivalent.

Always open bleed valves slowly. These



weepage will occur when the valves

are opened. Operating personnel must

protect themselves from exposure to



Principle of Operation

The Type MR105 is a direct-operated pressure

reducing regulator. Downstream pressure is registered

externally through a 1/2 NPT control line tapped in the

bonnet (for low-pressure actuator, see Figure 2) or in

the lower diaphragm casing (for high-pressure actuator,

see Figure 3). When downstream demand decreases,

the pressure under the actuator diaphragm increases.

This pressure overcomes the regulator setting (which

is set by the regulator control spring). Through the

action of the actuator stem and valve spring, the valve

plug moves closer to the seat ring and reduces the

ow. When demand downstream increases, pressure

under the actuator diaphragm decreases. Spring force

pushes the actuator stem downward, the valve plug

moves away from the seat ring and the ow increases

1 2 3 4 5 6 7 8 ... 23 24

Reducing Regulators 1
Type MR105 10

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Emerson MR105 Manuale delle Istruzioni Pagina 3

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