Emerson MR105 Data Sheet

Bulletin 71.1:MR105

Type MR105 Direct-Operated Pressure Reducing Regulators

January 2015

TYPE MR105 DIRECT-OPERATED REGULATOR WITH

LOW-PRESSURE ACTUATOR

Figure 1. Type MR105 Direct-Operated Pressure Reducing Regulators

Contents

Introduction .................................................................. 2

Specifications .............................................................. 2

Features ......................................................................3

Principle of Operation .................................................. 4

Overpressure Protection.............................................. 4

Installation ................................................................... 6

Applications ................................................................. 6

Universal NACE Compliance....................................... 8

Capacity Information.................................................... 8

Ordering Information.................................................. 27

Ordering Guide ......................................................... 27

P1204P1205

TYPE MR105 DIRECT-OPERATED REGULATOR WITH

HIGH-PRESSURE ACTUATOR

Features

• Travel Indicator

• Large Flow

• Stability

• Fast Response

• Steel and Stainless Steel Constructions Meet API 614 Requirements

• Available Constructions to Meet NACE MR0175-2003 and NACE MR0103 Requirements for Sour Gas Service Capability

• Multiple Trim Materials Available

• ANSI/FCI 70-3-2004 Class VI Shutoff

• Multiple End Connection Options

• P

= P2 on High-Pressure Actuator

• Suitable for High-Temperature Applications up to 250°F / 121°C

• Easy Access to Trim Parts

• Drain Valve

• Pressure-Loaded Actuator

• Bleed valve (for High-Pressure Actuator only)

www.fisherregulators.com

D103256X012

Bulletin 71.1:MR105

Specications

The Specications section on this page provides the ratings and other specications for the Type MR105. The

following information is stamped on the nameplate fastened on the regulator at the factory: type; body size; maximum inlet, outlet and differential pressure; maximum pressure above setpoint; maximum casing pressure; maximum temperature; spring range; cage type; and trim and diaphragm material.

Body Sizes and End Connection Styles

See Table 1

Shutoff Classication per ANSI/FCI 70-3-2004

Class VI (Soft Seat)

Maximum Inlet, Outlet and Emergency Casing

Pressure

(1)

See Table 3

Outlet Pressure Ranges

(1)

5 to 300 psig / 0.34 to 20.7 bar; see Table 2

Maximum Setpoint

(1)

Low-Pressure Actuator: 43 psig / 3.0 bar High-Pressure Actuator:

Downstream Control Line Connection Size

1/2 NPT

Maximum Pressure Over Setpoint to Avoid Internal Parts Damage

Low-Pressure Actuator: 20 psig / 1.4 bar High-Pressure Actuator: 120 psig / 8.3 bar

Spring Case Vent

Type Y602-12

Pressure-Loaded Spring Case Vent Connection

1/2 NPT

Approximate Weights

For Type MR105 with Low-Pressure Actuator

Nitrile (NBR) and Ethylene Propylene (EPDM) Diaphragm: 300 psig / 20.7 bar Fluorocarbon (FKM) Diaphragm:

150 psig / 10.3 bar

Construction Materials

For Type MR105 with High-Pressure Actuator

See Table 6

Maximum Differential Pressures

(1)

See Table 4

Flow and Sizing Coefcients

See Table 5

Temperature Capabilities

(1)

Nitrile (NBR): -20 to 180°F / -29 to 82°C Fluorocarbon (FKM): 20 to 250°F / -7 to 121°C Ethylene Propylene (EPDM)

(3)

: -20 to 225°F /

-29 to 107°C

(2)

Options

• Visual Travel Indicator

• Drain Valve

• Pressure-Loaded Actuator

• NACE Construction

• Bleed Valve (for High-Pressure Actuator Only)

• Ethylene Propylene (EPDM) Elastomer

Pressure Registration

External

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

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

3. Ethylene Propylene (EPDM) is limited to 20 to 250°F / -7 to 121°C when used with Low Pressure Actuator.

(1)

NPS 1 / DN 25: 86 lbs / 39 kg NPS 2 / DN 50: 116 lbs / 53 kg NPS 3 / DN 80: 165 lbs / 75 kg NPS 4 / DN 100: 174 lbs / 79 kg

NPS 1 / DN 25: 76 lbs / 34 kg NPS 2 / DN 50: 105 lbs / 48 kg NPS 3 / DN 80: 155 lbs / 70 kg NPS 4 / DN 100: 164 lbs / 74 kg

Trim Parts

Introduction

The Type MR105 regulators are direct-operated, pressure reducing, high-capacity, multi-purpose regulators.

They are designed to handle pressures up to 400 psig /

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

This product provides a simple, fast, reliable and economical way to control and reduce pressure in multi-

purpose applications suitable for different ow media

such as liquid, air and gas. Applications include lube oil

systems and any application where speed of response is

critical, minimum differential pressure is a concern or uid

is not free of impurities. Type MR105 regulator with a low-pressure actuator can be set up to 43 psig / 3.0 bar and the high-pressure actuator version can be set up to 300 psig / 20.7 bar.

The units are available in 4 sizes, NPS 1 through 4 /

DN 25 through 100 and are available in several end connection congurations to meet demands on

application requirements.

Table 1. Body Sizes and End Connection Styles

BODY MATERIAL

NPS 1 and 2 / DN 25 and 50 NPS 3 and 4 / DN 80 and 100

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

WCC steel

CF8M Stainless steel

CF3M Stainless steel

1. Optional NACE construction available.

2. Constructions meet API 614 requirements.

(1)(2)

NPT, CL150 RF, CL300 RF, CL600 RF

or PN 16/25/40 RF

NPT, CL150 RF, CL300 RF, CL600 RF

or PN 16/25/40 RF

NPT, CL150 RF, CL300 RF, CL600 RF

or PN 16/25/40 RF

Table 2. Outlet Pressure Ranges

BODY SIZE, NPS 1 AND 2 / DN 25 AND 50

Actuator Type

Low Pressure

High Pressure

Actuator Type

Low Pressure

High Pressure

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.

Spring Range

psig bar In. mm In. mm psig bar

5 to 12 0.34 to 0.83 GE42909X012 White 0.437 11.1 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

(1)

25 to 60 43 to 100 3.0 to 6.9 GE42909X012 White 0.437 11.1

75 to 175

110 to 300

Spring Range

psig bar In. mm In. mm psig bar

5 to 8 0.34 to 0.55 GE42909X012 White 0.437 11.1

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 39 to 72 2.7 to 5.0 GE42909X012 White 0.437 11.1

71 to 175

110 to 250

1.7 to 4.1

(2)

5.2 to 12.1

(2)

7.6 to 20.7

(2)

4.9 to 12.1

(2)

7.6 to 17.2

Spring Part

Number

(1)

GE42907X012 Green 0.375 9.52

(2)

GE42910X012 Silver 0.500 12.7

(2)

GE42911X012 Orange 0.562 14.3

BODY SIZE, NPS 3 AND 4 / DN 80 AND 100

Spring Part

Number

(2)

GE42910X012 Silver 0.500 12.7

(2)

GE42911X012 Orange 0.562 14.3

Spring Color

Code

Spring Color

Code

Bulletin 71.1:MR105

END CONNECTION STYLE

Body Size

CL150 RF, CL300 RF, CL600 RF

or PN 16 RF

CL150 RF, CL300 RF, CL600 RF

or PN 16 RF

CL150 RF, CL300 RF, CL600 RF

or PN 16 RF

Spring Wire Diameter Spring Free Length

9.70 246

Spring Wire Diameter Spring Free Length

9.70 246

Maximum Pressure Over Setpoint to Avoid Internal Parts Damage

20 1.4

120 8.3

Maximum Pressure Over Setpoint to Avoid Internal Parts Damage

20 1.4

120 8.3

Available in linear and quick opening trim cages for gas and liquid applications, respectively. The cage-guided metal plug provides superior control and stability.

The Type MR105 with steel or stainless steel body construction has been designed to meet API 614 as required by lube oil manufacturers.

Features

Travel Indicator—Travel indicator option provides visual indication of the valve movement from the closed to open position.

Large Flow—Able to pass large ow rates with

minimal offset from setpoint.

Stability—The Type MR105 regulator’s cage-guided metal plug design provides superior control stability of delivery pressure.

Fast Response—Direct-operated allows for fast

response to meet the most demanding pressure and

ow requirements.

Steel and Stainless Steel Constructions Meet API 614 Requirements—Steel and Stainless steel

body constructions comply with the recommendations of API Standard 614.

Available Constructions to Meet NACE MR0175-2003 and NACE MR0103 Requirements for Sour Gas Service Capability—

Optional materials are available for applications handling sour gases. These constructions comply with the recommendations of NACE International Standards MR0175 and MR0103.

Multiple Trim Materials Available—416, 316 and

316L Stainless steel options are available to meet

wider application requirements including demands on lube oil and cooling water applications.

Bulletin 71.1:MR105

Table 3. Maximum Inlet, Outlet and Emergency Casing Pressures

BODY

MATERIAL

Cast Iron

WCC steel

CF8M

Stainless steel

CF3M

Stainless steel

1. Based on a maximum temperature of 250°F / 121°C.

2. Maximum outlet and emergency casing pressures for constructions with Fluorocarbon (FKM) diaphragm are limited to 230 psig / 15.8 bar or the body rating limit, whichever is lower.

END

CONNECTION

NPT 340 23.4

CL125 FF 175 12.1 175 12.1 175 12.1 CL250 RF 400 27.6 400 27.6 400 27.6

NPT 400 27.6

CL150 RF 245 16.9 245 16.9 245 16.9 CL300 RF CL600 RF

PN 16 RF 245 16.9 245 16.9 245 16.9

PN 16/25/40 RF 400 27.6 400 27.6 400 27.6

NPT 400 27.6

CL150 RF 225 15.5 225 15.5 225 15.5 CL300 RF CL600 RF

PN 16 RF 225 15.5 225 15.5 225 15.5

PN 16/25/40 RF 400 27.6 400 27.6 400 27.6

NPT 400 27.6

CL150 RF 185 12.7 185 12.7 185 12.7 CL300 RF CL600 RF

PN 16 RF 185 12.7 185 12.7 185 12.7

PN 16/25/40 RF 400 27.6 400 27.6 400 27.6

MAXIMUM INLET PRESSURE MAXIMUM OUTLET PRESSURE MAXIMUM EMERGENCY CASING

psig bar

400 27.6 400 27.6 400 27.6

(1)

Low-Pressure

Actuator

psig bar psig bar psig bar psig bar

70 4.8

High-Pressure

340 23.4

400 27.6

Actuator

(2)

Low-Pressure

Actuator

70 4.8

High-Pressure

340 23.4

400 27.6

Actuator

(2)

ANSI/FCI 70-3-2004 Class VI Shutoff—Soft-seat

valve plug disks for tight shutoff.

Multiple End Connection Options—Type MR105 is

available in several end connection congurations to

meet demands on application requirements.

P1 = P2 on High-Pressure Actuator—Inlet pressure rating equals outlet pressure rating on high-pressure actuator constructions up to 400 psig / 27.6 bar.

Easy Drain—Feature allows you to drain the system without expensive spool pieces saving you time and space.

Easy Bleed—Feature allows you to purge the air trapped underneath the diaphragm when the highpressure regulator is installed in the upright position, which improves speed of response.

Principle of Operation

Refer to Figure 2. 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 low-pressure actuator bonnet or in the high-pressure actuator lower casing. 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 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

downstream as the regulator opens in response to the decreased pressure underneath the diaphragm.

The downward motion of the plug allows gas to ow

through the cage into the downstream system.

Increased downstream pressure permits the regulator to close. The combination of valve spring force and valve plug unbalance provides positive valve plug shutoff against the port and upper seals.

Overpressure Protection

Type MR105 regulator with the low-pressure actuator has outlet pressure ratings lower than the inlet pressure ratings. Complete downstream overpressure protection is needed if the actual inlet pressure exceeds the outlet pressure rating.

Overpressuring any portion of a regulator or associated equipment may cause personal injury, leakage or property damage due to bursting of pressure-containing parts or explosion of accumulated gas. Provide appropriate pressurerelieving or pressure-limiting devices to ensure

Bulletin 71.1:MR105

M1178

VALVE PLUG

SEAT RING

DIAPHRAGM

VALVE PLUG

VALVE SPRING

CAGE

ACTUATOR STEM

ACTUATOR

CONTROL SPRING

TYPE MR105 WITH LOW-PRESSURE ACTUATOR

VALVE SPRING

SEAT RING

DIAPHRAGM

M1181

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

Figure 2. Type MR105 Operational Schematic

CAGE

ACTUATOR STEM

ACTUATOR

CONTROL SPRING

TYPE MR105 WITH HIGH-PRESSURE ACTUATOR

Bulletin 71.1:MR105

PUMP 2

PUMP 1

FILTER 1

OIL TANK

M1202

Figure 3. Lube Oil Skid Diagram

TYPE MR108

BACKPRESSURE REGULATOR

that the limits in the Specications section are not

exceeded. Regulator operation within ratings does not prevent the possibility of damage from external sources or from debris in the pipeline. A regulator should be inspected for damage periodically and after any overpressure condition. Refer to the relief sizing

coefcients in the Specications and the Capacity

Information section to determine the required relief valve capacity.

FILTER 2

TYPE MR105

PRESSURE REDUCING

REGULATOR

TO EQUIPMENT BEARINGS, SEALS OR SERVO-CONTROLS

Applications

Note

A linear cage is recommended for applications where low ow stability is a concern but it will limit the overall capacity of the regulator.

Lube Oil Skids (Figure 3)

Installation

Vertical installation with the actuator installed directly above or below the main valve is recommended but for optimal performance the actuator should be installed below the main valve. The use of a bleed valve is recommended for liquid installations that require the high pressure actuator to be mounted above the main valve. The unit will operate in horizontal installations with the actuator on the side, however, this could result

in premature wear of parts. Make sure that ow will

be in the same direction as that indicated by the body arrow. Orientation of the two vents should always be down. Vents may be rotated after regulator installation so that the vent screens are down.

A control line must be installed to allow outlet pressure to register on the actuator’s diaphragm. The size of the

control line is indicated in the Specications section,

and should be installed four to eight pipe diameter downstream of the regulator and in an area of pipe that is free of turbulence.

An instruction manual is provided with every regulator shipped. Refer to this for detailed installation, operation, adjustment and maintenance instructions. Included is a complete listing of individual parts and recommended spare parts.

Lube oil skids maintain oil ow to bearings, seals and

servo-controls on critical turbomachinery assets such as air and gas compressors, steam turbines, power recovery turbines and power generating equipment. These skids are essential in keeping lube oil clean at all times and

ensure maximum service life for the equipment. Because it is critical to maintain a constant ow and pressure of

oil to the equipment, it is normally equipped with two pumps – the main pump and the auxiliary pump, which

will take over in case of main pump failure – and lters.

In normal condition, the skids operate in the following manner:

• Lube oil is stored in the tank at atmospheric pressure.

• It is then fed to the main pump (Pump 1) which

pressurizes the lube oil.

• Oil then goes through a lter.

• After ltration, oil ow is split such that a fraction

is sent to a backpressure regulator to limit the supply pressure to the pressure reducing regulator. 20%

of the pump rate ows through the backpressure

regulator, sending back oil to the oil tank.

• The pressure reducing regulator decreases the pressure to a safe and allowable range. Flow through this regulator is 80% of pump rate.

SET HIGHER THAN WORKER REGULATOR

Bulletin 71.1:MR105

WORKER CONTROL LINE

MONITOR CONTROL LINE

TYPE MR105

M1203

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

INTERMEDIATE PRESSURE

Figure 4. Type MR105 Monitor Regulator Operational Schematic

MONITOR REGULATOR

• Oil ows to large rotating equipment lubricating

bearings, e.g. turbines and compressors.

The loss of pressure or ow to the bearings or these

turbomachinery assets may shut down the equipment or

even the whole plant. Failure of the main pump or lter

results in the following upset operation:

• Auxiliary pump (Pump 2) and lter system is

brought into operation while main pump is in operation.

• Auxiliary pump ramp up rate is one second.

• Auxiliary pump produces a pressure spike

that is beyond the limitations of the pressure reducing regulator.

• The backpressure regulator relieves the excess pressure back to the oil tank. Flow rate is 120% of total pump rate.

Main pump can now be shut down to allow repair of

the system. High capacity direct-operated regulators

are recommended for this type of application where speed of response is critical. The Type MR105 can provide fast response to the pressure spikes as described above while maintaining a constant delivery pressure of oil to the bearing.

TYPE MR105

WORKER REGULATOR

Wide-Open Monitoring System

Refer to Figure 4. Monitoring system provides overpressure protection by containment and therefore

does not vent to the atmosphere. It involves a specic

arrangement of two regulators in series which are

congured such that if one regulator fails wide open,

the other regulator assumes control to maintain

the downstream pressure at a set limit. During an

overpressure situation, monitoring systems keep the customer on line. Testing is also relatively easy. To perform a periodic test on a monitoring regulator, increase the outlet set pressure of the worker regulator and watch the outlet pressure gauge to determine if the monitor regulator takes over at the appropriate outlet pressure.

In such systems, both regulators are sensing downstream

pressure. During normal operation of a wide-open monitor conguration, one regulator (worker) is set at the desired

downstream pressure. The other regulator (monitor) is set at a higher pressure and remains wide open. The lock-up pressure will be the worker regulator lock-up pressure. If the worker regulator fails open, the monitor regulator controls the downstream pressure at its setpoint and the lock-up pressure will be the monitor lock-up pressure.

Bulletin 71.1:MR105

Table 4. Maximum Differential Pressures

ACTUATOR TYPE

Low Pressure

High Pressure

BODY SIZE

NPS DN psid bar d psid bar d

1 25 2 50 200 13.6 3 80 225 15.5 4 100 225 15.5 1 25 2 50 200 13.6 3 80 225 15.5 4 100 250 17.2

Gas Service (Linear Cage) Liquid Service (Quick Opening Cage)

400 or maximum

inlet pressure,

whichever is lower

400 or maximum

inlet pressure,

whichever is lower

Table 5. Wide-Open Flow and IEC Sizing Coefficients

Body Size

NPS DN C

1 25 463 13.7 34.0 0.81 0.90 0.73 0.36 2 50 761 22.5 33.8 0.75 0.87 0.72 0.24 3 80 997 30.5 32.7 0.78 0.88 0.68 0.22 4 100 934 27.5 34.0 0.77 0.88 0.75 0.18

Body Size

NPS DN C

1 25 597 17.5 34.1 0.81 0.90 0.73 0.43 2 50 1740 48.2 36.1 0.81 0.90 0.82 0.34 3 80 3540 103.1 34.4 0.76 0.87 0.75 0.32 4 100 4300 135.9 31.6 0.72 0.85 0.65 0.30

Body Size

NPS DN C

2 50 1570 43.8 35.9 0.81 0.90 0.72 0.36

Wide-Open Flow Coefcient IEC Sizing Coefcient

Line Size Equals Body Size

Wide-Open Flow Coefcient IEC Sizing Coefcient

Line Size Equals Body Size

Wide-Open Flow Coefcient IEC Sizing Coefcient

Line Size Equals Body Size

REDUCED PORT QUICK OPENING CAGE

LINEAR CAGE

QUICK OPENING CAGE

MAXIMUM DIFFERENTIAL PRESSURE

27.6 or maximum inlet pressure,

whichever is lower

27.6 or maximum inlet pressure,

whichever is lower

200 13.6

250 17.2

Universal NACE Compliance

Optional materials are available for applications handling sour gases. These constructions comply with the recommendations of NACE International Sour Service Standards.

The manufacturing processes and materials used by Emerson Process Management Regulator

Technologies, Inc. assure that all products specied

for sour gas service comply with the chemical, physical and metallurgical requirements of NACE MR0175 and/or NACE MR0103. Customers have the responsibility to specify correct materials. Environmental limitations may apply and shall be determined by the user.

Capacity Information

Air Capacities

To determine wide-open ow capacity for relief valve

sizing, use one of the following equations:

For Critical Pressure Drops

Use this equation for critical pressure drops (absolute outlet pressure equal to one-half or less than one-half the absolute inlet pressure).

Q = P

1(abs)Cg

where,

Q = gas ow rate, SCFH

Cg = gas sizing coefcient P1 = absolute inlet pressure, psia

For Non-Critical Pressure Drops

Use this equation for pressure drops lower than critical (absolute outlet pressure greater than one-half of absolute inlet pressure).

520

Q = CgP1SIN DEG

3417

ΔP

Table 6. Construction Materials

Bulletin 71.1:MR105

1. Powder coated.

where,

PART NAME STANDARD OPTIONAL

Body WCC steel

Body Flange WCC steel

Actuator Casings - Low Pressure AISI 1010 steel

Actuator Casings - High Pressure WCC steel

Internal Stiffener Plate AISI 1010 steel

Spring Case WCC steel CF3M/CF8M Stainless steel

Spring Case Spacer Zinc-Plated steel Stainless steel

Cage CF3M/CF8M (Quick Opening), CF8M (Linear) Stainless Steel

Valve Plug and Seat Ring 416 Stainless steel

Closing Spring Inconel® X750

Stem S17400 H1075 Stainless steel S20910 (Nitronic 50) Stainless steel

Lower Diaphragm Support S17400 H1075 Stainless steel

Diaphragm and Seals Nitrile (NBR) Fluorocarbon (FKM), Ethylene Propylene (EPDM)

Upper Diaphragm Plate Cast Iron

Control/Set Spring Steel Alloy

Spring Seats Zinc-Plated steel

Bolting

Adjusting Screw Zinc-Plated steel Stainless steel

SA194 Grade B7/NCF (Body to Bonnet),

SAE Grade 5/NCF (Actuator)

(1)

Cast Iron, CF8M, CF3M Stainless steel

CF8M, CF3M Stainless steel

316/316L Stainless steel

CF3M/CF8M Stainless steel

316/316L Stainless steel

316, 316L,

S20910 (Nitronic 50) Stainless steel

(NPS 1 / DN 25 body size only)

(1)

Stainless steel

Maximum Allowable Pressure Drop for Liquid

Q = gas ow rate, SCFH G = specic gravity of the gas

T = absolute temperature of gas

at inlet, °Rankine Cg = gas sizing coefcient P1 = absolute inlet pressure, psia C1 = ow coefcient ΔP = pressure drop across the regulator, psi

Then, if capacity is desired in normal cubic meters per hour at 0°C and 1.01325 bar, multiply SCFH by 0.0268.

Liquid Capacities

To determine regulating capacities or to determine wide-open capacities for relief sizing at any inlet pressure, use the following equation.

Q = C

where,

Q = liquid ow rate, GPM ΔP = pressure drop across the regulator, psi CV = regulating or wide-open ow coefcient

G = specic gravity of the liquid

ΔP

Pressure drops in excess of allowable will result in

choked ow and possible cavitation damage.

Choked ow is the formation of vapor bubbles in the liquid owstream causing a condition at the vena contracta which tends to limit ow through

the regulator. The vena contracta is the minimum

cross-sectional area of the ow stream occurring just

downstream of the actual physical restriction.

Cavitation and ashing are physical changes in the process uid. The change is from the liquid state to the vapor state and results from the increase in uid velocity at or just downstream of the greatest ow restriction, normally the regulator orice.

To determine the maximum allowable pressure drop for water:

ΔP

= Km (P1)

(allow)

where,

ΔP = Valve differential in psi

Km = Valve recovery coefcient from Table 5 P1 = Valve inlet pressure in psia

Inconel® is a mark owned by Special Metals Corporation.

+ 19 hidden pages

Emerson MR105 Data Sheet

Specifications and Main Features

Frequently Asked Questions

User Manual