válvula d'agua.pdf

7/28/2019 vlvula d'agua.pdf

1/11

MAKING MODERN LIVING POSSIBLE

DKRCC.PD.DA0.A6.02 / 520H6962

Features y Media: Fresh water and Neutral brine(versions or sea water available on request)

y Rerigerants: HCFC and Non-ammable HFC

y Needs no power supply sel acting

y Opens on rising condensing pressure

y Complete ow range rom 1.4 300 m3/h

y Low ow version o WVFX 0,63 m3/h(available on request)

y Insensitive to dirt

y WVFX 10 40 direct operated water valve

y WVS 32 100 orced servo operatedwater valve

y Valves with capillary tubes available

on request.

Data sheet

Water ValveTypes WVFX and WVS

Water valves types WVFX and WVSare used or regulating the ow o waterin rerigeration plant with water-cooledcondensers.

The water valves give modulating regulation

o the condensing pressure within denedlimits during operation. When thererigeration plant is stopped, the coolingwater ow is shut of automatically.

Besides the standard versions, WVFX 15,WVFX 20 and WVFX 25 can be supplied withstainless steeil housing or use withaggressive media, such as sea water orcooling o condensers and compressors.


2/11

Data sheet Water Valve, types WVFX and WVS

2 DKRCC.PD.DA0.A6.02 / 520H6962

Technical data

1) The kv value is the ow o water in [m3/h] at a pressure drop across valve o 1 bar, = 1000 kg/m3.2) Fully open valve requires 33% higher pressure than a WVFX, range 3.5 16 b ar.3) WVFX 15, WVFX 20 and WVFX 25 with stainless steel housing only.

WVFX 10 40 are direct actuated valves.WVS 32 100 are servo-operated valves.

Media temperature rangeWVFX 10 25: -25 130 CWVFX 32 40: -25 90 CWVS: -25 90 CI a WVS is required with an opening diferentialpressure o 1 10 bar, the valve servo springmust be replaced. See Ordering.

Opening diferential pressureWVFX 10 25: max. 10 barWVFX 32 40: max. 10 barWVS 32 40: min. 0.5 bar;

max. 4 barWVS 50 100: min. 0.3 bar;

max. 4 barBelow 20% o max. capacity the WVS will act asan on-of regulator.

Type

Condenser side Liquid side

kv value1)

Rerigerant

Control

press.

adjustable

closingpress.

Max.working

pressure

PS/MWP

Max.test

pressure

Pe

Media

Max.working

pressure

PS/MWP

Max.test

pressure

Pe

[bar] [bar] [bar] [bar] [bar] [m3/h]

WVFX 10

HCFC andNon-

fammableHFC

3.5 16.0 26.4 29.0

Freshwater,

neutralbrine, sea

water 3)

16 24 1.4

WVFX 10 2) 4.0 23.0 26.4 29.0 16 24 1.4

WVFX 10 15.0 29.0 45.2 60.0 16 24 1.4

WVFX 15 3.5 16.0 26.4 29.0 16 24 1.9

WVFX 15 2) 4.0 23.0 26.4 29.0 16 24 1.9

WVFX 15 15.0 29.0 45.2 60.0 16 24 1.9

WVFX 20 3.5 16.0 26.4 29.0 16 24 3.4

WVFX 20 2) 4.0 23.0 26.4 29.0 16 24 3.4

WVFX 20 15.0 29.0 45.2 60.0 16 24 3.4

WVFX 25 3.5 16.0 26.4 29.0 16 24 5.5

WVFX 25 2) 4.0 23.0 26.4 29.0 16 24 5.5

WVFX 25 15.0 29.0 45.2 60.0 16 24 5.5

WVFX 32 4.0 17.0 24.1 26.5 10 10 11.0

WVFX 40 4.0 17.0 24.1 26.5 10 10 11.0

WVS 32

HCFC andNon-

fammableHFC

2.2 19.0 26.4 29.0

Freshwater,

neutralbrine

10 16 12.5

WVS 32 15.0 29.0 45.2 60.0 10 16 12.5

WVS 40 2.2 19.0 26.4 29.0 10 16 21.0

WVS 40 15.0 29.0 45.2 60.0 10 16 21.0WVS 50 2.2 19.0 26.4 29.0 10 16 32.0

WVS 50 15.0 29.0 45.2 60.0 10 16 32.0

WVS 65 2.2 19.0 26.4 29.0 10 16 45.0

WVS 65 15.0 29.0 45.2 60.0 10 16 45.0

WVS 80 2.2 19.0 26.4 29.0 10 16 80.0

WVS 80 15.0 29.0 45.2 60.0 10 16 80.0

WVS 100 2.2 19.0 26.4 29.0 10 16 125.0

WVS 100 15.0 29.0 45.2 60.0 10 16 125.0


3/11

DKRCC.PD.DA0.A6.02 / 520H6962 3


1) ISO 228-12) WVFX 15 with 1 m capillary tube and are nut with valve depressor

TypeConnection 1) Range

Code no.Water side Condenser side [bar]

WVFX 10 G in. / 6 mm fare 3.5 16 003N1100

WVFX 10 G 1 in. / 6 mm fare 4.0 23 003N1105

WVFX 15 G in. / 6 mm fare 3.5 16 003N2100

WVFX 15 G in. / 6 mm fare 4.0 23 003N2105

WVFX 15 G in. / 6 mm fare nut 4.0 23 003N2205 2)

WVFX 20 G in. / 6 mm fare 3.5 16 003N3100

WVFX 20 G in. / 6 mm fare 4.0 23 003N3105

WVFX 25 G 1 in. / 6 mm fare 3.5 16 003N4100

WVFX 25 G 1 in. / 6 mm fare 4.0 23 003N4105

WVFX 32 G 1 in. / 6 mm fare 4.0 17 003F1232

WVFX 40 G 1 in. / 6 mm fare 4.0 17 003F1240

Ordering WVFX, commercial type

WVFX, maritime type (stainless steel version)

WVFX, commercial type (high pressure rerigerants, MWP 45.2 bar)



WVFX 15 G in. / 6 mm fare 3.5 16 003N2101

WVFX 15 G in. / 6 mm fare 4.0 23 003N2104

WVFX 20 G in. / 6 mm fare 4.0 23 003N3104

WVFX 25 G 1 in. / 6 mm fare 3.5 16 003N4101

WVFX 25 G 1 in. / 6 mm fare 4.0 23 003N4104



WVFX 10 G in. / 6 mm fare 15.0 29.0 003N1410

WVFX 15 G in. / 6 mm fare 15.0 29.0 003N2410

WVFX 20 G in. / 6 mm fare 15.0 29.0 003N3410

WVFX 25 G 1 in. / 6 mm fare 15.0 29.0 003N4410

1) ISO 228-1

1) ISO 228-1


4/11


4 DKRCC.PD.DA0.A6.02 / 520H6962

Type Connection 1)

Code no.

Valve body Pilot unit 3)Pilot unit or

R410A and

R744 3)Flange set 4)

Servo spring ordiferential

pressure rangeo 1 10 bar

WVS 32 G 1 1) 016D5032 016D1017 016D1018 016D1327

WVS 40 G 1 1) 016D5040 016D1017 016D1018 016D0575

WVS 50 2 in. weld fange 016D5050 2) 016D1017 016D1018 027N3050 016D0576




Description Code no.

1 m capillary tube 1/4 in. (6 mm) fare coupling nuts at each end 060-017166

Bracket or WVFX 10 25 003N0388

WVS, commercial type

Accessories

1) ISO 22812) Parts included: valve body, ange gaskets, ange bolts and

screws or pilot valve.

3) Parts included: control element and spring housing.4) Parts included: 2 anges

Ordering(continued)


5/11

[bar]

[m3/h]

DKRCC.PD.DA0.A6.02 / 520H6962 5


Type [bar] p

WVFX 10 2.0

WVFX 15 2.5

WVFX 20 3.0

WVFX 25 3.5

WVFX 32 40 3.0

WVS 32 0.6

WVS 40 0.7

WVS 50 80 0.8

WVS 100 0.9

Capacity

The capacity curves show the capacities oindividual valves (water quantity in [m3/h])depending on the pressure drop across valves.

The capacities given apply at 85% valve openingand are obtained with the ollowing ofset(rise in condensing pressure).

Standard servo spring type WVS

Special servo spring type WVS

Water Valves Ofset rise in condensing pressure


6/11


6 DKRCC.PD.DA0.A6.02 / 520H6962

Design / Function Condensing pressure impulses are transmittedvia the bellows element to the valve cone so thatthe valve even at very small pressurevariations is able to adapt the quantity o waterrequired by the condenser.

The valves are pressure-relieved in such a way

that a variation in the water pressure will notafect their setting.

To protect the rerigeration plant against highhead pressures in the event that the water supplyto the condenser ails, a saety switch type KP orRT should be tted on the high pressure side.

The valve cone (8) is a brass plate with avulcanized layer o articial rubber to orm anelastic seal against the valve seat. The valve isexternally sealed by the diaphragms (7).

The top and bottom o the valve plate holder areextended by a guide that is tted with O-rings (5)to ensure the internal operating parts movecorrectly. These O-rings, tted in conjunctionwith the diaphragms, also provide extraprotection against external leakage.

The valve seat is made o stainless steeland is pressed to the valve body.

The spring housing (2) is o aluminium and has aguide slot or the spring holder that is extendedin the orm o an indicating pointer.An associated indicator label is riveted to thehousing and is graduated rom 1 5.

1. Handwheel2. Spring housing

3. Spindle guide4. Spring retainer5. O-ring6. Guide bush7. Diaphragm8. Valve cone9. Thrust pad

10. Bellows element

WVFX 10 25

WVFX 32 40

The valve cone (7) is made o brass witha T-ring (6) o articial rubber orming a exibleseal against the valve seat. The O-rings (8) are

external seals or the cooling water.

The valve cone guide bushes (5) are speciallytreated to counteract lime deposits rom thecooling water inside the cylinder, and alsoto reduce riction in the valve to a minimum.

The valve seat is made o stainless steeland is pressed to the valve body.

The regulating spindle (13) is mountedin a guide in the spring housing which hasa notch or the spring holder (14). The springholder also acts as an indicator.

1. Bellows element2. Upper pressure spindle3. Top plate4. Guide bush gland5. Guide bush6. T-ring7. Valve cone8. O-ring9. Lower pressure spindle

10. Spring retainer11. Spring housing12. Regulating spring13. Regulating spindle14. Spring holder

Water side connections are internal BSPand the compressor discharge side connectionis in. / 6 mm are.

The valve body WVFX 10 25 is made ohot-stamped brass and or WVFX 32 40 o castiron. WVFX 15, WVFX 20 and WVFX 25 can also be

supplied in stainless steel housing.

All metal external valve parts are surace-treatedto resist corrosion rom condensate, etc.

It is possible to order reverse acting WVFX valve,which opens on rerigerant pressure decrease.

Reverse acting valve are mostly used in bypasslines and heat pump applications.


7/11


7 DKRCC.PD.DA0.A6.02 / 520H6962

WVS 32

WVS 50 100

WVS 40Design / Function(continued)

1. Pressure connection(are nipple)

2. Pressure connection

(weld nipple)3. Bellows element4. Push rod5. Regulating nut6. Spring housing

6a. Cover7. Pilot assembly8. Spindle or pilot cone9. Teon sleeves

10. Insulating gasket10a. Gasket11. O-ring12. Valve cover13. O-ring14. O-ring

15. Servo piston16. Bottom screw17. Drain plug18. Gasket19. Strainer assembly,

complete20. Sel-cleaning strainer

assembly21. Pilot orice22. Gasket23. O-ring24. Servo spring

WVS 32 40 valves have internal BSP

connections, while WVS 50 100 can be suppliedwith either BSP connections or weld anges.

Connection to the plant condenser can be madeby copper tube or steel tube, the valves beingsupplied with both a are nipple or 1/4 in. (6 mm)copper tube and a weld nippleor 6 mm / 10 mm steel tube.

The valve consists of three main components:

1. Main valve with servo pistonThe main valve body is made o cast iron

with a pressed-in bronze seat. The servo piston iso gun metal and has a sleeve and a proledrubber seal ring.

2. Pilot valve

The pilot valve is made o gun metal, the pilotcone and seat o stainless steel and the pilotorice o brass. These materials are particularlyresistant to water corrosion. However, the valve isnot resistant to sea water.

The strainer ahead o the pilot orice is made onickel gauze.

The degree o opening o the pilot valve (whichcorresponds to the increase in condensingpressure above the set opening pressure)determines the degree o opening o the mainvalve and thereby amount o the water ow.

3. Bellows unit with connection to condenserThe bellows unit is made o aluminiumand corrosion-prooed steel.


8/11


8 DKRCC.PD.DA0.A6.02 / 520H6962

Necessary mass ow

Volume ow

Sizing When sizing and selecting water valves it is mostimportant to ensure that the valve at any time isable to give the necessary quantity of cooling water.

To select a suitable size o valve it is necessaryto know the precise amount o cooling required.

On the other hand, to avoid the risk o unstableregulation (hunting) the valve should not beoversized.

In general, the aim should be to select thesmallest valve capable o giving the requiredow.

To obtain a precise control it can berecommended to only use 85% o the capacity.Below 85% the ratio between ow and

condensing diference pressure is linear. Above85% the ratio is no longer linear. To reach a 100%capacity the water valve needs signicantincrease o condensing pressure. See g. below.

Valve size

Sizing Examples Example 1:Condenser capacity Q0: 30 kWCondensing temperature t0: 35 CRerigerant: R404ACooling media: water

Specic heat capacity o water Cp: 4.19 kj/(kg*K)Water inlet temperature t1: 15 CWater outlet temperature t2: 25 CPressure drop across valve p: max. 1.0 bar

m =Q

c 3600 =30

3600 = 2577 kg/hC

p (t

2 t

1) 4.19 (25 15)

V =m

=2577

2.6 m3/h 1000

Type [bar] p of set

WVFX 10 2.0

WVFX 15 2.5

WVFX 20 3.0

WVFX 25 3.5

WVFX 32 40 3.0

WVS 32 0.6

WVS 40 0.7

WVS 50 80 0.8

WVS 100 0.9

The ollowing data is used when selectingthe size o the water valve:

y Cooling capacity o condensery Temperature rise in cooling media

y Diferential pressure across valve

y Condensing temperaturey Specic heat capacity o cooling media

y Rerigerant

Water Capacity

Condensing

pressure


9/11

Standard servo spring type WVS

Special servo spring type WVS

[bar]

[m3/h]

DKRCC.PD.DA0.A6.02 / 520H6962 9


Example 2:Condenser capacity QC: 20 kWCondensing temperature tC: 35 CRerigerant: R134aCooling media: BrineDensity o brine : 1015 kg/m3

Specic heat capacity o water Cp: 4.35 kj/(kg*K)Water inlet temperature t1: 20 CWater outlet temperature t2: 25 CPressure drop across valve p: max. 2.0 bar

Selecting size

Necessary mass ow

Volume ow

kv value

V =m

=3310

3.26 m3/h 1015

m =Q

c 3600 =20

3600 = 3310 kg/hC

p (t

2 t

1) 4.35 (25 20)

kv

V

=3.26

= 2,32 m3/h

1000 p 1000 2.0

1015

Selecting size o WVFX 20kv 2.32 m

3/h => WVFX 20WVFX 20 has kv = 3.4 m

3/h and the necessarycapacity is below 85% o ull capacity

Code numberThe saturated pressure or R134aTc = 35 C Pc = 7.9 barg

Choose a WVFX 20 with 3.5 16 barg range

Selecting WVFX 20 Code numberThe saturated pressure or R404ATc = 35 C => Pc = 15.5 barg

Choose a WVFX 20 with 4 23 barg range


10/11

Danfoss

A3N200.1

0.1

0FW

Danfoss

3-193.1

5FW

Danfoss

16D03.1

4FW

Danfoss

3N1573.10FW

Danfoss

3N1573.10FW

Danfoss

16D69.1

4FW


10 DKRCC.PD.DA0.A6.02 / 520H6962

Dimensions [mm]and weights [kg]

WVFX 10 25 WVFX 10 25 high pressure rerigerant

Bracket or WVFX 10 25 WVFX 32 40

WVS 32 40 WVS 50 100


11/11


Danoss A/S (AC-MCI / jmn), 2012-12 DKRCC.PD.DA0.A6.02 / 520H6962 11

Dimensions [mm]and weights [kg](continued) Type H1 H2 H3 L L1 B

Net

weight

WVFX 10 91 133 72 11 55 1.0

WVFX 15 91 133 72 14 55 1.0

WVFX 20 91 133 90 16 55 2.0

WVFX 25 96 138 95 19 55 2.0

WVS 32 42 243 234 138 20 85 4.0

WVS 40 72 271 262 198 30 100 7.0

WVS 50 78 277 268 315 218 165 19.0

WVS 65 82 293 284 320 224 185 24.0

WVS 80 90 325 316 370 265 200 34.0

WVS 100 100 345 336 430 315 220 44.0

Type H1 H2 H3 L L1 B Net

weight

WVFX 10 91 189 72 11 55 1.0

WVFX 15 91 189 72 14 55 1.0

WVFX 20 91 189 90 16 55 2.0

WVFX 25 96 194 95 19 55 2.0

WVS 32 42 259 250 138 20 85 4.0

WVS 40 72 287 278 198 30 100 7.0

WVS 50 78 293 284 315 218 165 19.0

WVS 65 82 309 300 320 224 185 24.0

WVS 80 90 341 332 370 265 200 34.0

WVS 100 100 361 352 430 315 220 44.0

Water Valves standard rerigerants

Water Valve high pressure rerigerants

válvula d'agua.pdf

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