Controles Para CO2 Ra0xa102

Components for CO2 applications in Industrial Refrigeration

Application guide

Refrigeration and Air Conditioning Controls

R E F R I G E R A T I O N A N D A I R C O N D I T I O N I N G

2 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003

Technical leafl et Industrial Refrigeration Valves for CO2 Applications

Contents Page

Introduction................................................................................................................................... 3

General information about CO2 .................................................................................................... 3

Design pressure...................................................................................................................... 3

Material compatibility .............................................................................................................. 4

Water in CO2 systems............................................................................................................. 5

Safety valves in CO2 systems ................................................................................................. 7

Capacity.................................................................................................................................. 7

Components for CO2 .................................................................................................................... 8

Coils for solenoid valves ............................................................................................................... 9

Pressure transmitters ................................................................................................................. 10

Filter Driers................................................................................................................................. 11

Ordering ..................................................................................................................................... 12

Delivery....................................................................................................................................... 19


Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 3

Introduction The objective of this application guide is to provide an overview of which Danfoss Industrial Refrigeration products are suitable for use in CO2 applications.

Today, Danfoss is offering a broad programme of industrial products applicable for CO2, however this is dependent on demands regarding the design pressure. The table on page 8 lists the components which are suitable for CO2 applications together with the maximum working pressure limits.

General information about CO2

For further background information about CO2 as a refrigerant, please refer to the Danfoss article "CO2 Refrigerant for Industrial Refrigeration" (literature number RZ0ZR).

There are a number of important factors to be taken into consideration when determining the design pressure.

1. Pressure during operation: The pressure during operation is dependent on actual system design (single stage, cascade system or CO2- ”brine” system) and the load variation.

2. Pressure during “stand still”: The pressure during stand still can be very high and this has to be taken into consideration:

• A small separate refrigeration system can be used to keep the liquid temperature at a level, where the saturated pressure is lower than the design pressure

• Designing the system with an expansion vessel of a size that prevents the pressure from exceeding the design pressure.

• Designing the plant so that it can withstand the saturated pressure at the design temperature (approx. 80 bar)

From Danfoss’ experience, it would appear that the most common solution for industrial refrigeration applications is to use a small separate refrigeration system to limit the temperature of the liquid CO2.

Design pressure 3. Pressure tolerances for safety valves (10 – 15 %) Safety valves require a certain pressure difference (difference between set pressure and reseating pressure) to ensure that the valve is closed properly. Normally the closing tolerance is 10% of the set pressure. Additionally, it is good practice to add 3-5% to the closing tolerance, to take care of any pressure variations / peaks.

Note: In the “IoR - Code of Practice” issued by the Institute of Refrigeration in London, the above mentioned tolerance is stated to be 20%

4. Temperature / pressure requrements for defrosting Depending on the actual design, different ways of defrosting can be applied (natural, water, electrical or CO2 hot gas defrosting). The CO2 hot gas defrosting is the most effi cient, especially at low temperatures, but it also has the highest pressure demand. With a design pressure of PS=50 bar, it is possible to reach a defrosting temperature of approx. 9-10°C. The saturated pressure at 9°C is 43.9 bar g. By adding 10% for the safety valves and approx. 5% for pressure peaks, the requirement is for pressure PS ~ 50 bar g.

There is not one common method to perform defrosting. All methods, as described above, are used, depending on the system, but also on the availability of suitable compressors and other components.



Material compatibility The tests have shown that CO2 is different, and modifi cations have to be made on some products. The large amount of CO2, which can dissolve in polymers, has to be taken into consideration. Some commonly used polymers are not compatable with CO2, and others require different fi xing methods e.g. sealing materials.

When the pressure is close to the critical pressure and the temperature is high, the impact on polymers is much more extreme. However, those conditions are not important for industrial refrigeration as pressure and temperatures are lower for these systems.

CO2 is compatible with almost all common metallic materials, unlike NH3. There are no restrictions from a compatibility point of view, when using copper or brass.

The compatibility of CO2 and polymers is much more complex. As CO2 is a very inert and stable substance, the chemical reaction with polymers is not critical. The main concern with CO2 is the physiochemical effects, such as permeation, swelling and the generation of cavities and internal fractures. These effects are connected with the solubility and diffusivity of CO2 in the actual material.

Danfoss has carried out a number of tests to ensure that components released for use with CO2 can withstand the impact of CO2 in all aspects.



In NH3 systems it is well known that there are problems as a result of reaction with oil, oxygen, water and solid contaminations, but these are all handled today by frequent oil changes and use of air purgers. Compared to NH3 CO2 is less sensitive, but if water is present, problems may occur.

How can water penetrate into a CO2 system?

• The pressure of CO2 systems is always above the atmospheric pressure, therefore there are not the same risks as in e.g. NH3 systems, of air/water penetration into a leaking CO2 system. However, pemeation of water into the system is still possible.

• When charging CO2, there are different grades of CO2, some of which allow relatively high amounts of water.

• CO2 is treated as a very safe refrigerant, and is therefore handled without following the normal safety requirements. If a system is opened up, air can penetrate into it, and the moisture can condense inside the tubes. If the system is not evacuated properly, some water may well be retained.

• By charging lubricant (oil) to the compressor.

The acceptable amount of water in CO2 systems is much lower than in systems with other common refrigerants. If the water content exceeds the dew-point, and the temperature is below 0°C, the water will freeze, creating a risk of problems with equipment in the system e.g. blocking control valves. The water can very easily be removed by mounting a drier in the system.

Driers in CO2 are very effi cient, and are normally mounted in the liquid line to avoid any unnecessary pressure drops being created.

Water in CO2 systems

Water Solubility in Refrigerants.

Liquid Phase(Y-Axis Linear)

0

500

1000

1500

2000

2500

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Temperature [ oC]

mg

of

wate

r/kg

refr

igera

nt

[pp

m]

Water Solubility in Refrigerants.

Gas Phase(Y-Axis Linear)

0

200

400

600

800

1000

1200

1400

1600

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Temperature [oC]

mg

of

wate

r/kg

of

refr

igera

nt

[pp

m]

CO2

CO2

R134aR134a

Fig. 1: Water solubility

Fig. 1 shows the maximum (water) moisture content that can be dissolved in the liquid and gas phases of CO2, compared with R 134a.



0

200

400

600

800

1000

1200

1400

1600

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Temperature [°C]

mg

of

wa

ter/

kg

of

refr

ige

ran

t [p

pm

]

CO2

NH3R134a

R22

R404A

0

10

20

30

40

50

60

70

80

90

100

-50 -40 -30 -20 -10 0 10 20

Temperature [°C]

mg

of

wa

ter/k

g o

f re

frig

era

nt

[pp

m]

CO2 + H2O gasPhase

CO2 +

ICE

CO2 +

WaterCO2

Fig. 2: Water solubility

Water solubility in RefrigerantsGas Phase(Y-Axis Linear)

Water in CO2 systems(cont.)

0

10

20

30

40

50

60

70

80

90

100

-50 -40 -30 -20 -10 0 10 20

Temperature [ºC]

mg

of

wate

r/kg

refr

igera

nt

[pp

m] "Wet"

"Dry"

Fig. 3: SGN moisture indication for CO2

Water in CO2

Danfoss Sight Glass SGN in CO2

In fi g. 2, the maximum water content, which can be dissolved in the CO2 gas phase, is compared with other commonly used refrigerants. The maximum water content

for CO2 is much lower than for the other refrigerants. If the maximum concentration is exceeded, this will appear as free water or as ice in the refrigeration system.

An indication of water content can be obtained by using a Danfoss SGN sight glass.- A “dry” system is shown with a green indicator- A “wet” system is shown with a yellow indicator

Water/moisture content values for these conditions are shown in fi g. 3



Water in CO2 systems(cont.)

Fig. 4: CO2 systems with DML fi lter drier and SGN indicator

Due to the thermodynamic properties of CO2, in particular the triple point, which is located at much higher pressure than for all other common refrigerants, the formation of solid CO2 can occur.

If a safety valve is mounted in a CO2 system at e.g. 50 bar, the pressure in the downstream (outlet) line from the safety valve will pass the triple point at 5.2 bar.Below the triple point, CO2 will change from a mixture of liquid and vapour into a mixture of solid and vapour. The formation of solid CO2 in the downstream line can, in the worst case, block this line.

Safety valves in CO2 systems

The most effective solution to this problem is to mount the safety valve without an outlet line, thus blowing directly into the atmosphere.

The phase change of the CO2 does not take place directly in the valve, but just after the valve, and in this case in the atmosphere.

If safety valves or any other safety devices, have to be mounted in liquid lines, they must never blow to the atmosphere or any other places where the backpressure is below 5.2 bar.If the back-pressure is below the triple point (5.2 bar) a very high fraction of the CO2 will be solid.

Fig. 5: Flow in downstream lines from safety valves

CO2 system with fi lter drier and indicator

Filter drier Moisture indicator

CondenserEvaporator

Capacity CO2 capacity calculations for Danfoss Industrial Refrigeration components can be undertaken using the DIRcalc selection software.



Components for CO2 Today, Danfoss is offering a broad programme of industrial components applicable for CO2.

The majority of components listed below have been evaluated and upgraded, and are therefore applicable for CO2 within the pressure and temperature range stated in the technical documentation. In particular the pressure is the limiting factor for this group of components.

Special components for “high” pressure CO2 applications have been developed. The most common types of valves are listed on the following pages.

Please note the high pressure specials are generally available to order only and extended delivery times should be considered.

Pressure Equipment Directive (PED)The Industrial Refrigeration valves are approved in accordance with the European standards specifi ed in the Pressure Equipment Directive and are CE marked.

All marked components are applicable for CO2 in the standard execution. These components are applicable for CO2 40 bar or 50 bar.

In connection with the CE approval of these valves, Danfoss has implemented product modifi cations and approved them for the maximum pressure. The products are subject to specifi c testing and marking, but all of them are CE approved.

CO2

20

25

30

35

40

45

50

55

60

-30 -20 -10 0 10 20

Design temperature (°C)

Pre

ss

ure

(b

ar)

Design pressure (bar-g): PS + 15 %

"Saturated"pressure (bar-a)

PS + 10% (bar-g)

PS 50

PS 40

PS 25

high pressure components

DN PS

25

bar

PS

40

bar

PS

50

bar

Modulating liquid level regulators PMFL PMFH all 5 - 65

Main Valves, Solenoid Valves PM1 PM3 PML PMLX all 5 - 65

Pilot Valves for PM Main Valves EVM

Other pilots

Motor Regulating Valves MRV all 5 - 65

Motor Expansion Valves MEV all 5 - 65

Float Valves HFI 100, 150 100 - 150

SV 1-3 & 4,5,6

Stop Valves SVA 10 - 200 10 - 200

SVA 250, 300 250 - 300

Regulating Valves REG all 15 - 65

Stop Check Valves SCA all 15 - 125

Gas Powered Stop Valve GPLX 80, 100, 125 80 - 125

SFV 15, 20, 25 15 - 25

BSV 8 8

DSV 1, DSV 2 all 20 - 32 **) 1

POV 40, 50, 80 40 - 80

Filters FIA all 15 - 200

NRVA all 15 - 65

NRVS 20, 25, 32 20 - 32

CHV all 15 - 40

Solenoid Valves EVRA all 10 - 40 **) 1

EVRS all 10 - 25 **) 1 **) 1

Electrically operated expansion valve AKVA all 15 - 40 **) 1

Level Indicator AKS 41 all

The product can

be used in

standard version.

All products are

CE approved

The product must

be manufactured

in a special

version (design

modif ication,

higher test

pressure, marking

All products are

CE approved

and documentation).

Safety Valves and Change Over Valves

Check Valves

The product must

be manufactured

in a special

version (higher

test pressure,

marking and

documentation).

All products are

CE approved

Danfoss industrial refrigeration

Filter drier DML

Moisture indicator SGN 35 bar

42 bar



Due to the high pressure difference between the condenser and evaporator, the Maximum Opening Pressure Differential (MOPD) demand for the solenoid valve in some applications may exceed the standard coil capabilities.

Typical applications could be:Liquid injection for cooling the compressorHot gas defrostShut off valve before expansion valve

Therefore Danfoss offers a 20 W coil, that covers a MOPD range up to 40 bar. The 20 W coil program includes 24, 110 and 230 V a.c. 50 Hz power supplies.

Coils for solenoid valves If the MOPD demands are beyond the capability of the 20 W coil program or a d.c. supply is used, Danfoss has developed a new coil concept, “Power Electronic”. With this new program the MOPD of the solenoid valve can be increased up to 50 bar.

As illustrated below, the power of a coil with "Power Electronic" feature, the inrush is higher than a standard coil. After 100 msec. the power of the coil reduces to a lower level than a standard coil. Therefore "Power Electronic" will give a higher MOPD and a lower power consumption than a standard coil.

For further information, please contact Danfoss

Power

Inrush

Holding

55 watt

4 watt

Time

Power

Time

20 watt

"Power electonic" for 230V, 50Hz Standard coil for 20W, 230V, 50Hz



Pressure transmitters AKS 3000 is a series of absolute transmitterswith high-level signal conditioned current output, developed to meet demands in A/C and re frig er a tion.

AKS 3000 utilises the proved piezoresistive measuring principle, which has been used for decades in Danfoss pressure transmitters.

The pressure reference is a sealed gauge. This means that atmospheric pressure variations have no infl uence on regulating ac cu ra cy. A must in accurate low pressure reg u la tion.

Features Designed to meet A/C and refrigeration de-mands without compromising control accuracy concerning

Tough environment• Vibration• Shock during operation and transport• Humidity and ice formation• Temperature variations• Corrosive media like ammonia gases and salt mist

Convenient performance• 4 to 20 mA signal• 1% typical accuracy• 0.5% typical linearity• Prepared for high pressure refrigerants• Bar code for tracing of calibration data

Perfect system integrity• Compact design• Max. working pressure ≤ 33 bar• Temperature compensation for suction line• Optimized accuracy at –10°C and +20°C for suction line installations, see page 4• 1/4 -18 NPT, G 3/8 A or 1/4 fl are ensures tight pressure connection• All laser welded AISI 316L stainless steel enclosure • No soft seals• Enclosure: IP 65 with plug; IP 67 with cable

All materials in contact with the refrigerant and materials for the housing are AISI 316L stain-less steel. No soft gaskets, all en vi ron men tal sealings are made through laser weldings only.

AKS 3000 has a 4 to 20 mA output, and is available with 2 m cable or with spade terminals and DIN 43650 plug.

Application• Fan speed control• High pressure control• Compressor capacity control• Evaporator pressure detection• Oil pressure control

Approvals• UL• CE marked acc. to the EMC directive



Eliminator ® liquid line fi lter driers protect refrigeration and air-conditioning systems from moisture, acids, and solid particles. With these contaminants eliminated, systems are safer from harmful chemical reactions and from abrasive impurities.

Type DML driers have a core composition of 100% molecular sieves.

All Eliminator ® driers have a solid core with binding material held to an absolute minimum. Core selection is primarily based on the refrigerant oil used in the system.

Eliminator ® type DML, with a solid core of 100% molecular sieves, is optimised for use with HFC and CO2 refrigerants and polyolester (POE) or polyalkyl glycol (PAG) oils. Type DML driers are designed for applications requiring high water adsorption, and can be used with any manufacturer’s compressor. Because type DML driers contain no activated alumina, oil additives will not be depleted.

Eliminator ® liquid line fi lter driers

The Core• 100% 3Å molecular sieves core.• High drying capacity minimizing the risk of

acid formation (hydrolysis).• Optimized for HFC refrigerants (R 134a,

R 404A, R 410A, etc.) and CO2 with POE or PAG oils. Compatible with R 22.

• Will not deplete oil additives.

The Shell• UL approved for MWP of 42 bar (609 psi).• Available with solder (Cu-plated steel

connectors) and fl are connections.• Compact 3 cubic inches drier ideal for

refrigeration and air conditioning units.• Corrosion resistant powder-painted fi nish.

Can be used in all environments including marine applications.

• Allows installation with any orientation provided the arrow is in the fl ow direction.

• Available in sizes from 3 to 75 cubic inches.

The Filter• 25 µm fi lter provides high retention with

minimal pressure drop.• Thermally stable up to 120°C (248°F).

Features

Capacity DML capacities for CO2 are similar to R134a and R22 and these tables can be used for selection purposes.



Stop valve

Size Type Max. Working Pressure

Connection Code Number

mm in.

10 3/8 SVA 10 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3829

10 3/8 SVA 10 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3830





25 1 SVA 25 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3834

25 1 SVA 25 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3835





50 2 SVA 50 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3840

50 2 SVA 50 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3841



Regulating valve



mm in.

15 1/2 REG 15 D ANG CONE#4 50 bar (725 psi) DIN 148G3172








25 1 REG 25 D ANG CONE#4 50 bar (725 psi) DIN 148G3180












Ordering

Stop check valve



mm in.

15 1/2 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3522


25 1 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3523



50 2 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3424


The following list details the most commonly used Danfoss refrigeration components for CO2 applications. Components with alternative types of connections and dimensions can be supplied on request.

The Code Numbers specifi ed include a mix of special high pressure and standard products. In both cases the Maximum Working Pressures should be adhered to. The list also includes components which are not suitable for use with NH3, but are suitable for use for CO2 systems (moisture indicators and fi lter driers).

D = Butt weld DIN connectionANG = Angleway



Check valve



mm in.

15 1/2 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3526


25 1 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3528



50 2 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3531


Filter



mm in.

15 1/2 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3215


25 1 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3216



50 2 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3219


Code numbers include bodies only and fi lter inserts to be ordered separately

Check valve

Type Max. Working Pressure

Code Number

NRVA 15 40 bar (580 psi) 020-2070

NRVA 20 40 bar (580 psi) 020-2070

NRVA 25 40 bar (580 psi) 020-2072

NRVA 32 40 bar (580 psi) 020-2072

NRVA 40 40 bar (580 psi) 020-2074

NRVA 50 40 bar (580 psi) 020-2074

NRVA 65 40 bar (580 psi) 020-2076

Flanges have to be ordered separately (See the section Flanges)

Ordering(cont.)

Overfl ow valve



mm in.

20 3/4 OFV D ANG OVERFLOW VALVE 50 bar (725 psi) DIN 148G3192

25 1 OFV D ANG OVERFLOW VALVE 50 bar (725 psi) DIN 148G3193

The differential pressure can be adjusted 2-8 bar

Stop valve (stainless steel)



mm in.

15 1/2 SVA-SS 15 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3843

15 1/2 SVA-SS 15 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3844



25 1 SVA-SS 25 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3847

25 1 SVA-SS 25 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3848







Ordering(cont.)

Overfl ow valve (stainless steel)



mm in.

20 3/4 OFV-SS 20 D ANG OVER FLOW VALVE 50 bar (725 psi) DIN 148G3194

25 1 OFV-SS 25 D ANG OVER FLOW VALVE 50 bar (725 psi) DIN 148G3195

Differential pressure can be adjusted 2-8 bar

Stop check valve (stainless steel)



mm in.

15 1/2 SCA-SS 15 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3532


25 1 SCA-SS 25 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3534



Check valve (stainless steel)



mm in.

15 1/2 CHV-SS 15 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3537


25 1 CHV-SS 25 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3539



Filter (stainless steel)



mm in.

15 1/2 FIA-SS 15 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3221


25 1 FIA-SS 25 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3223



Regulating valve (stainless steel)



mm in.

15 1/2 REG-SS 15 D ANG CONE#4 50 bar (725 psi) DIN 148G3542








25 1 REG-SS 25 D ANG CONE#4 50 bar (725 psi) DIN 148G3550












Solenoid valve with NC/NO pilot valve


Code Number

PML 32 40 bar (580 psi) 027F1801

PML 40 40 bar (580 psi) 027F1802

PML 50 40 bar (580 psi) 027F1803

PML 65 40 bar (580 psi) 027F1804

PML 80 40 bar (580 psi) 027F1805

PML 100 40 bar (580 psi) 027F1806

PML 125 40 bar (580 psi) 027F1807

Flanges have to be ordered separately (See the section Flanges)EVM solenoid valves and coils have to be ordered separately

Pilot operated main valve


Code Number

PM 1 - 5 40 bar (580 psi) 027F4001

PM 1 - 10 40 bar (580 psi) 027F4002

PM 1 - 15 40 bar (580 psi) 027F4003

PM 1 - 20 40 bar (580 psi) 027F4004

PM 1 - 25 40 bar (580 psi) 027F4005

PM 1 - 32 40 bar (580 psi) 027F4006

PM 1 - 40 40 bar (580 psi) 027F4007

PM 1 - 50 40 bar (580 psi) 027F4008

PM 1 - 65 40 bar (580 psi) 027F4009


Pilot operated main valve


Code Number

PM 3 - 5 40 bar (580 psi) 027F1810

PM 3 - 10 40 bar (580 psi) 027F1811

PM 3 - 15 40 bar (580 psi) 027F1812

PM 3 - 20 40 bar (580 psi) 027F1813

PM 3 - 25 40 bar (580 psi) 027F1814

PM 3 - 32 40 bar (580 psi) 027F1815

PM 3 - 40 40 bar (580 psi) 027F1816

PM 3 - 50 40 bar (580 psi) 027F1817

PM 3 - 65 40 bar (580 psi) 027F1818


Ordering(cont.)

Pilot


Code Number

CVPP (HP) 40 bar (580 psi) 027B1268

Motor expansion valve


Code Number

MEV 80-2 40 bar (580 psi) 027F4020

MEV 80-3 40 bar (580 psi) 027F4021

MEV 80-4 40 bar (580 psi) 027F4022

MEV 80-5 40 bar (580 psi) 027F4023

MEV 80-6 40 bar (580 psi) 027F4024

MEV 80-7 40 bar (580 psi) 027F4025

MEV 125 40 bar (580 psi) 027F4026

MEV 200 40 bar (580 psi) 027F4027

MEV 300 40 bar (580 psi) 027F4028

MEV 500 40 bar (580 psi) 027F4029

Flanges have to be ordered separately (see the fl ange section)



Motor regulating valve


Code Number

MRV 5 40 bar (580 psi) 027F4080

MRV 10 40 bar (580 psi) 027F4081

MRV 15 40 bar (580 psi) 027F4082

MRV 20 40 bar (580 psi) 027F4083

MRV 25 40 bar (580 psi) 027F4084

MRV 32 40 bar (580 psi) 027F4085

MRV 40 40 bar (580 psi) 027F4086

MRV 50 40 bar (580 psi) 027F4087

MRV 65 40 bar (580 psi) 027F4088

Flanges have to be ordered separately. (See the section Flanges)

Ordering(cont.)

Solenoid valve

Size Type Max. Working pressure

Connection Code number

mm in

EVRA 3 40 bar (580 psi) DIN 032X3050

EVRA 10 with manual stem 40 bar (580 psi) DIN 032X6210




32 11/4 EVRA 32 with manual stem 40 bar (580 psi) DIN 042H1126

40 11/2 EVRA 40 with manual stem 40 bar (580 psi) DIN 042H1128

Coils: See “Coils for Solenoid valves”

Solenoid valve stainless steel


Connection Code number

mm in

10 3/8 EVRS 3 50 bar (725 psi) DIN 032X3080

15 1/2 EVRST 10 with manual stem 50 bar (725 psi) DIN 032X3083

20 3/4 EVRST 15 with manual stem 50 bar (725 psi) DIN 032X3085

25 1 EVRST 20 with manual stem 50 bar (725 psi) DIN 032X2237

Coils: See “Coils for Solenoid valves”

Electrically operated expansion valve

Valve type Rated capacity1) kv-value ConnectionsInlet x outlet

Code no. ConnectionsInlet x outlet

Code no.

kW tons m3/h in. in.

AKVA 10-1 4 1.1 0.010 3/8 × 1/2 068F3261 1/2 × 3/4 068F3281

AKVA 10-2 6.3 1.8 0.015 3/8 × 1/2 068F3262 1/2 × 3/4 068F3282

AKVA 10-3 10 2.8 0.022 3/8 × 1/2 068F3263 1/2 × 3/4 068F3283

AKVA 10-4 16 4.5 0.038 3/8 × 1/2 068F3264 1/2 × 3/4 068F3284

AKVA 10-5 25 7.1 0.055 3/8 × 1/2 068F3265 1/2 × 3/4 068F3285

AKVA 10-6 40 11.4 0.103 3/8 × 1/2 068F3266 1/2 × 3/4 068F3286

AKVA 10-7 63 17.9 0.162 1/2 × 3/4 068F3267

AKVA 10-8 100 28.4 0.251 1/2 × 3/4 068F3268

AKVA 15-1 125 35 0.25 Flange 068F50202)

AKVA 15-2 200 60 0.40 Flange 068F50232)

AKVA 15-3 300 90 0.63 Flange 068F50262)

AKVA 15-4 500 140 1.0 Flange 068F50292)

AKVA 20-1 500 140 1.0 1 1/4 × 1 1/4 042H2101

AKVA 20-2 800 240 1.6 1 1/4 × 1 1/4 042H2102

AKVA 20-3 1250 350 2.5 1 1/4 × 1 1/4 042H2103

AKVA 20-4 2000 600 4.0 1 1/2 × 1 1/2 042H2104

AKVA 20-5 3150 900 6.3 2 × 2 042H21051) Rated capacities are based on Condensing temperature tc = 32°C Liquid temperature tl = 28°C Evaporating temperature te = 5°C 2) Incl. bolts and gaskets but without fl angesMax. working pressure: 42 bar



Butt welding DIN (2448) fl anges for PM, PML, MRV, MEV, EVRA and AKVA

Size OD T OD T Flangetype

For use with valve type Code no.mm in. mm mm in. in.

202532

3/41

11/4

26.933.742.4

2.32.62.6

1.0591.3271.669

0.0910.1030.102

3

PM 5, 10, 15, 20, 25,PML 5, 10, 15, 20, 25, MRV 5, 10, 15, 20, 25,MEV 80EVRA 20, 25AKVA 15-1, 15-2, 15-3, 15-4

027N1220027N1225027N1230

3240

11/411/2

42.448.3

2.62.6

1.6691.902

0.1020.103

10

PM 32, PML 32, MRV 32, MEV 125

027N2332027N2340

4050

11/22

48.360.3

2.62.9

1.9022.370

0.1030.110

11

PM 40, PML 40, MRV 40,MEV 200

027N2440027N2450

5065

221/2

60.376.1

2.92.9

2.3703.000

0.1100.110

12

PM 50, PML 50, MRV 50MEV 300

027N2550027N2565

65 21/2 76.1 2.9 3.000 0.110 13

PM 65, PML 65, MRV 65,MEV 500

027N2665

Butt welding DIN (2448) fl anges for NRVA, EVRA

Size OD T OD T Flangetype

For use with valve type Code no.mm in. mm mm in. in.

10 3/8 18 2 0.710 0.079 1.3 NRVA 15/20, EVRA 3/10/15 027N1112

15 1/2 22 2.5 0.866 0.098 1.3 NRVA 15/20, EVRA 3/10/15 027N1115

20 3/4 26.9 2.3 1.059 0.091 1.3 NRVA 15/20, EVRA 3/10/15 027N1120

25 1 33.7 2.6 1.327 0.103 4 NRVA 25/32 027N1026

32 11/4 42.4 2.6 1.669 0.102 4 NRVA 25/32 027N1033

40 11/2 48.3 2.6 1.902 0.103 6 NRVA 40/50 027N1042

50 2 60.3 2.9 2.370 0.110 6 NRVA 40/50 027N1051

65 21/2 76.1 2.9 3.000 0.110 8 NRVA 65 027N1055

Flanges:Ordering(cont.)



Sight glass



mm in.

6 × 610 × 1012 × 12

1/4 × 1/4 3/8 × 3/8 1/2 × 1/2

SGN 6SGN 10SGN 12

35 bar (507 psi)

Flareext. × ext.

014-0161014-0162014-0163

6 × 610 × 1012 × 12

1/4 × 1/4 3/8 × 3/8 1/2 × 1/2

SGN 6SGN 10SGN 12

Flareint. × ext. 1)

014-0171014-0172014-0173

16 × 16

1/4 × 1/4 3/8 × 3/8 1/2 × 1/2 5/8 × 5/8

SGN 6sSGN 10sSGN 12sSGN 16s

ODF × ODFsolder

014-0181014-0182014-0183014-0184

6 × 610 × 1012 × 1218 × 18


ODF × ODFsolder

014-0191014-0192014-0193014-0195

16 × 16

1/4 × 1/4 3/8 × 3/8 1/2 × 1/2 5/8 × 5/8


ODF × ODMsolder

014-0201014-0202014-0203014-0204

1/2 NPT SGRN NPT 014-00061) Can be screwed directly into the fi lter drier.

Level indicator

Type Length

mm

Length

ins

Measuring range

mm

Measuring range

ins

AKS 41without Bargraph

Code no.

AKS 41with Bargraph

Code no.

AKS 41-3 280 11.02 207 8.1 084H4053 084H4153

AKS 41-5 500 19.69 427 16.8 084H4055 084H4155

AKS 41-8 800 31.5 727 28.6 084H4058 084H4158

AKS 41-10 1000 39.37 927 36.5 084H4060 084H4160

AKS 41-12 1200 47.24 1127 44.4 084H4062 084H4162

AKS 41-15 1500 59.06 1427 56.2 084H4065 084H4165

AKS 41-17 1700 66.93 1627 64.1 084H4067 084H4167

AKS 41-22 2200 86.61 2127 83.7 084H4072 084H4172

AKS 41-30 3000 118.1 2927 115.2 084H4080 084H4180

Must be calibrated for CO2

AKS 41U is also available (see technical leafl et)Max. working pressure: 60 bar



Ordering(cont.)

Please note the high pressure specials are generally available to order only and extended delivery times should be considered.

Delivery

Pressure transmitter

Type Pressure range Electrical connection Pressure connection Code no.

AKS 3000 PE 0...60 BARDIN 43650-A, PLUG PG9

G3/8 EN 837 060G1067


1/4-18 NPT 060G1083


7/16-20 UNF Flare 060G1329


G1/2 EN 837 060G3631

Filter drier with Cu-plated steel connectors

Type Conn.in.

Code no. Conn.mm

Code no. Max. working pressure

DML 032sDML 032.5sDML 033sDML 034s

1/45/163/81/2

023Z4552023Z4553023Z4555023Z4556

68

1012

023Z4551023Z4553023Z4554023Z4557

42 bar (609 psi)

DML 052sDML 052.5sDML 053sDML 054sDML 055s

1/45/163/81/25/8

023Z4559023Z4560023Z4562023Z4564023Z4565

68

101216

023Z4558023Z4560023Z4561023Z4563023Z4565

42 bar (609 psi)

DML 082sDML 082.5sDML 083sDML 084sDML 085s

1/45/163/81/25/8

023Z4567023Z4568023Z4570023Z4572023Z4573

68

101216

023Z4566023Z4568023Z4569023Z4571023Z4573

42 bar (609 psi)

DML 162sDML 162.5sDML 163sDML 164sDML 165sDML 166sDML 167s

1/45/163/81/25/83/47/8

023Z4575023Z4576023Z4578023Z4580023Z4581023Z4582023Z4583

68

1012161922

023Z4574023Z4576023Z4577023Z4579023Z4581023Z4582023Z4583

42 bar (609 psi)

DML 303sDML 304sDML 305sDML 306sDML 307sDML 309s

3/81/25/83/47/811/8

023Z4585023Z4587023Z4588023Z4589023Z4590023Z4592

10121619 2228

023Z4584023Z4586023Z4588023Z4589023Z4590023Z4591

42 bar (609 psi)

DML 414sDML 415sDML 417sDML 419sDML 604sDML 606sDML 607sDML 609s

1/25/87/8

11/81/23/47/8

11/8

023Z4594023Z4595023Z4596023Z4598023Z4600023Z4601023Z4602023Z4604

1216222812192228

023Z4593023Z4595023Z4596023Z4597023Z4599023Z4601023Z4602023Z4603

42 bar (609 psi)

DML 757sDML 759s

7/811/8

023Z4605023Z4607

2228

023Z4605023Z4606

42 bar (609 psi)

Pressure controls

Pressure Type 1)

High pressure (HP) ResetContact system

PEDapprovals

Code no.

Regulating range bar

Differential∆pbar

LP/HP1/4 in.6 mmfl are

High KP 6W 8 42 4 10 Aut. SPDT EN 12263 060-5190

High KP 6B 8 42 Fixed 4 Man. SPDT EN 12263 060-51911) W = Wächter (pressostat), B = Begrenzer (pressure control with ext. reset), S = Sicherheitsdruckbegrenzer (pressure control with int. reset). A bellows rupture in inner bellows will cause the refrigeration plant compressor to stop. Max. working pressure: 46.5 bar

Controles Para CO2 Ra0xa102

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