Danfoss SVA-140B Manual

Danfoss Ikke kategoriseret SVA-140B

Læs gratis den danske manual til Danfoss SVA-140B (4 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 21 personer og har en gennemsnitlig bedømmelse på 3.6 stjerner ud af 11 anmeldelser. Har du et spørgsmål om Danfoss SVA-140B, eller vil du spørge andre brugere om produktet?

Download PDF

Side 1/4

Installation guide

Shut-off valves

SVA-140B DN 50-100

148R9661

AN41292544562101-000101 | 1

Installation / Instalación / Installazione

Valve Size

Max. Nm

Nm máx.

Maks. (Nm)

Max. LB-feet

lb-ft máx.

Max. Lb-piedi

DN 50 - 65 133 +/ -5 98 +/ -3.7

DN 80 84 +/ -5 62 +/ -3.7

DN 100 135 +/ -5 100 +/ -3.7

Maintenance / Wartung / Entretien / Mantenimiento / Manutenzione

1 2 3

4 5

7 1098

Ag40 minimum 450 – 700 °C

089

Info for UK customers only : Danfoss Ltd., 22 Wycombe End, HP9 1NB, GB

Імпортер:ТОВ з іі “Данфосс ТОВ” 04080, Київ 80, п/с 168, Україна

2 | AN41292544562101-000101

ENGLISH

Installation

Refrigerants

Applicable to R744 (CO₂).

The valve is only recommended for use in closed

circuits. For further information please contact

your local Danfoss sales oce.

Pressure and temperature range

SVA-140B (DN 50-100) 140 bar (2030 psi) at

-40 °C

to +150 °C (-40 °F to +302 °F)

Operation

SVA are shut-o valves and must always be either

fully closed or fully open. Half open positions are

not allowed.

Attention!

Valves are balanced and should be operated by

hand and an appropriate sized wrench.

Closing the valve shall be done with a torque not

higher than 40 Nm (DN50/65) 70 Nm (DN80)

and 100 Nm (DN100).

Open the valve max 1 turn until the dierential

pressure is lower than 50 bar, then open fully.

Installation

The valve must be installed with the spindle

vertically upwards or in horizontal position

(g.1).

The valve is designed to withstand a high

internal pressure. However, the piping system

should be designed to avoid liquid traps and

reduce the risk of hydraulic pressure caused by

thermal expansion. It must be ensured that the

valve is protected from pressure transients like

“liquid hammer” in the system.

Recommended ow direction

To achieve optimum ow conditions, the valve

should be installed with the ow towards the

valve cone as indicated by the arrow on the side

of the valve body (g. 2). Flow in the opposite

direction is also acceptable but reduces the

- / C

value approx. 10%.

Welding

The bonnet should be removed before welding

(g. 3) to prevent damage to the sealing parts in

the packing gland, between the valve body and

bonnet as well as between cone and valve seat.

Be careful not to damage the cone sealing and

make sure the complete bonnet is protected

from dirt and water while removed.

Removing the bonnet can be omitted provided

that: The temperature in the area between the

valve body and bonnet during welding does not

exceed +150 °C /+ 302 °F. This temperature

depends on the welding method as well as on

any cooling of the valve body during the

welding itself. (Cooling can be ensured by, for

example, wrapping a wet cloth around the valve

body.) Make sure that no dirt, welding debris etc.

get into the valve during the welding procedure.

Only materials and welding methods,

compatible with the valve housing material,

must be used. The valve housing must be free

from stresses (external loads) after installation.

The valve should be cleaned internally to

remove welding debris on completion of

welding and before the valve is reassembled.

Avoid welding debris and dirt in the threads of

the housing and the bonnet.

Do NOT remove or service the dark colored

grease between the spindle thread and the

bonnet. In case the grease has been

contaminated with dirt, debris, particles or water

the complete top part must be replaced.

Stop valves must not be mounted in systems

where the outlet side of the valve is open to

atmosphere. The outlet side of the valve must

always be connected to the system or properly

capped o, for example with a welded-on end

plate.

Brazing

When brazing Danfoss recommends using Ag40

minimum 450 – 700 °C ller or better which are

suitable for the working pressure and following

procedure observed:

1. Remove top cover/insert

2. Clean connections with cleaning agent

3. Wrap around wet cloth (Fig. 4)

4. Apply ux on piping ends

5. Apply inert gas internal

6. Heat up piping

7. Braze with recommended brazing material

and within temperature range specied

8. Remove residual ux

Assembly

Remove welding or brazing debris and any dirt

from pipes and valve body before assembly.

Place a at gasket (g. 9) in the valve house

groove and place the complete top into the

valve house. Be careful not to damage the cone

sealing while inserting the complete top.

Tightening

Tighten the bonnet with a torque wrench, to the

values indicated in the table (g. 6). Please note

that the table (g. 6) containing maximum

torque must be adhered to and

never exceeded

Colours and identication

The SVA valves are painted with a green oxide

primer in the factory. Precise identication of

the valve is made via the ID ring at the top of the

bonnet, as well as by the stamping on the valve

body. The external surface of the valve housing

must be guarded against corrosion with a

suitable protective coating after installation

and assembly. Protection of the ID ring when

repainting the valve is recommended.

Maintenance

Packing gland

When performing service and maintenance

please observe, that the packing gland shall not

be replaced. Instead, replace the complete top

part, which is available as a spare part.

The packing gland can be tightened with a

wrench by carefully turning it clockwise until

fully tight. Tightening too much will lead to

excessive wear of the packing gland and shorten

the lifetime and will make the spindle movement

tighter.

As a general rule, the packing gland must not be

loosened to make the spindle movement easier,

if there is internal pressure in the valve.

However, if the following precautionary

measures are taken, the packing gland can be

loosened with the valve still under pressure:

Backseating (g. 7)

To backseat the valve, turn the spindle

counterclockwise until the valve is fully open

and tighten with following tightening torques.

Valve Size Lb-ftNm

DN 50/65 25 - 40 19 - 30

DN 80/100 70 - 100 52 - 74

Pressure equalization (g. 8)

In some cases, pressure forms behind the

packing gland. The pressure can be equalized

by slowly loosening the gland.

Dismantling the valve (g. 9)

Do not remove the bonnet while the valve is still

under pressure.

Before servicing the valve, isolate it from the

system. Drain CO₂ e.g. to above 5,2 bara to

prevent large formation of dry ice before

evacuation to zero pressure. Check for refrigerant

pressure before unscrewing and removing the

top cover.

If the at gasket (pos. a) or the cone sealing has

been damaged, it must be replaced.

Check that the spindle is free of scratches and

impact marks.

Replacement of the cone sealing (g. 10)

The cone sealing (b) can be replaced using

Danfoss repair kits.

Unscrew the 3 or 4 cone screws (a) with an allen

key.

The cone sealing can then be removed. Place the

new cone sealing on the cone. Ret with new

cone screws (a) and Nord lock discs.

Valve Size Screw size Lb-ftNm

DN 50/65 M6 12±1 9±1

DN 80/100 M8 29±2 22±2

Replacement of the EPDM backup O-ring

The EPDM backup O-ring can be replaced using

Danfoss repair kit This may be needed every .

second year, when operating constantly close to

the +150 °C temperature limit.

Turn the spindle clockwise and stop when the

black O-ring (c) becomes visible. (fig. 10)

Remove the old O-ring and replace with a new

O-ring applied with grease, to avoid damages to

the O-ring when mounting.

Do NOT remove or service the dark colored

grease between the spindle thread and

the bonnet. In case the grease has been

contaminated with dirt, debris, particles, or

water the complete top part must be replaced.

Assembly

Remove welding debris and any dirt from pipes

and valve body before assembly.

Place a

at gasket (g. 9) in the valve house

groove and place the complete top into the

valve house.

Tightening

Tighten the bonnet with a torque wrench, to the

values indicated in the table (g. 6). Please note

that the table (g. 6) containing maximum

torque must be adhered to and never exceeded.

The packing gland can be tightened with a

wrench by carefully turning it clockwise until the

fully tight Tightening too much will lead to .

excessive wear of the packing gland and shorten

the lifetime and will make the spindle movement

tighter.

Charging

Charge CO₂ gas to above 5,2 bara to prevent

large formation of dry ice when charging with

CO₂ liquid or equalizing with sy stem pressure.

Use only original Danfoss parts, including

packing glands, sealing parts and gaskets for

replacement. Materials of new parts are certied

for the relevant refrigerant. In cases of doubt,

please contact Danfoss. Danfoss accepts no

responsibility for errors and omissions. Danfoss

Industrial Refrigeration reserves the right to

make changes to products and specications

without prior notice.

In cases of doubt, please contact your local

Danfoss sales oce.

Produkt Specifikationer

Mærke:	Danfoss
Kategori:	Ikke kategoriseret
Model:	SVA-140B

Har du brug for hjælp?

Hvis du har brug for hjælp til Danfoss SVA-140B stil et spørgsmål nedenfor, og andre brugere vil svare dig

Dit navn*

Din email*

Skriv dit spørgsmål her

Ikke kategoriseret Danfoss Manualer

Danfoss PVG 16 Manual

1 September 2025

Danfoss VLT Lift Drive LD 302 Manual

26 August 2025

Danfoss VLT AQUA Drive FC 202 Manual

26 August 2025

Danfoss OSPB C F D L LS Manual

26 August 2025

Danfoss VACON NXP Manual

26 August 2025

Danfoss iC2-Micro Manual

26 August 2025

Danfoss VLT Micro Drive FC 51 Manual

26 August 2025

Danfoss VLT FC 103 Manual

12 August 2025

Danfoss VLT FC 360 Manual

12 August 2025

Danfoss VACON 100 Manual

12 August 2025

Ikke kategoriseret Manualer

Nyeste Ikke kategoriseret Manualer

Mahlkönig E80S Manual

17 September 2025

Vestil PLB/S-7 Manual

17 September 2025

Quick Dam Flood Gate QDFG30 Manual

17 September 2025

Vestil VHSR-4 Manual

17 September 2025

Kemo M012 Manual

17 September 2025

Vestil COL-4-36-23 Manual

17 September 2025

Vestil BOL-42-4.5 Manual

17 September 2025

Wesco 272937 Manual

17 September 2025

Vestil COL-4-36-44-HDG Manual

17 September 2025

Vestil DR-LOCK Manual

17 September 2025