Danfoss VFM 2 Data sheet

Data sheet

Seated valve (PN 16 & PN 25)
VFM 2 – Two way valve, flange

Description

Ordering

Features:

• Low seat leakage rate (< 0,03 % of k

• Rangeability R=

)

vs

>100:1 by PN 16
>100:1 by PN 25 up till DN 125 otherwise >80:1

• Pressure relieved design

Main data:

• DN 65-250

• kvs 63-900 m3/h

• PN 16 & PN 25

• Linear characteristic by 0-30% valve stroke
and Logarithmic characteristic by 30-100%
valve stroke.

• Stem down to close

• Medium:
Circulation water / glycolic water up to 50%

Valve for heating, district heating and district
cooling systems.

VFM 2 valve can be used together with following
Danfoss actuators:

• AMV(E) 655

• AMV(E) 658 SU/SD

• AME 659 SD

• Temperature:
2 (−10*) … 150 °C

* At temperature s from −10 °C up to +2 °C use stem hea ter

• Flange PN 16 & 25 connections

• Push-pull connection between valve and
actuator

• Compliance with Pressure Equipment
Directive 2014/68/EU

• AMV(E) 85/86 (for VFM 2 DN 150-250)

Valve VFM 2

Picture DN

200* 630

1)

Δp

is maximum p ermissible differen tial pressure across the valve ref fered for the whole ac tuating range of motorised val ve

max.

(a function of a ctuator's perfo rmance)

2)

Δps is maximum p ermissible clossing dif ferential pressure appl ied in fully closed positi on of the valve, at which valve will se al tightly

(close off pressure)
* For DN 200 in comb ination with AMV(E)85/86: kvs is reduced by 15%
For DN 250 in combinat ion with AMV(E)85/86: kvs is reduced by 20%

250* 900 5 065B3506 065B3087

kVSPN 16 Δp

(m3/h) (bar) (bar) for AMV(E)65x for AMV(E)85/86

65 63

80 100 065B3501 065B3082

100 160

125 250 065B3503 065B3084

150 400

2)

PN 25 Δp

S

16

10 10

2)

Δp

S

20

16

(bar) 1)Δp

max.

8 -

4 10 065B3504 065B3085

3

1)

(bar)

max.

7 065B3505 065B3086

PN 16

Code No.

065B3500 065B3081

065B3502 065B3083

PN 25

Code No.

Accessories

Typ e DN Code No.

Stem heater for AMV(E) 85/86 150-250 0 65Z7021

Stem heater for AMV(E) 65X 65-2 50 0 65Z7022

Service kits

Typ e Code No.

Top cover sealing set VFM 2 065B3528

Stuffing box

DN 65-12 5 065B3529

DN 150-250 065B3530

© Danfoss | 2021.11 AI148986474384en-010602 | 1

Data sheet Two way valve VFM 2

Technical data

Pressure temperature
diagram

Nominal diameter DN 65 80 100 125 150 200 250

k

value m3/h 63 10 0 160 250 400 630 900

VS

Stroke mm 30 34 40 50

Rangeability PN 16 >10 0:1

Rangeability PN 25 >10 0:1 >80:1

Control characteristic Lin by 0-30% and Log characteristic by 30-100% valve stroke

Cavitation factor z PN16 & PN 25 0.45 0.40 0.35 0.25 0.21

Leakage acc. to standard IEC 534 < 0.03 % of kVS

Nominal pressure PN 16 & 25

Medium Circulation water / glycolic water up to 50 % (standard VDI 2035)

Medium pH Min. 7, Max. 10

Medium temperature

Connections Flange PN 16 & 25 acc. to EN 1092-2

Materials

Valve body and cover

Valve seat, cone and spindle Stainless steel

Stuffing box sealing EPDM

1)

At tem peratures from –10 °C up to +2 °C use stem heater

EN-GJL-250 (GG-25)

o

C 2 (–10 1) ) … 150

Grey cast iron EN-GJL-250 (GG-25) for PN 16

Ductile iron EN-GJS-400-18 for PN 25

EN-GJS-400-18

PN 25

PN 16

Valve characteristics

Maximum allowed operating pressure as a function of medium temperature (according to EN 1092-2)

lin log
(30%) (70%)

Capacity

AB

A

Stroke

Stroke

Lin by 0-30% and Log by 30 -100% valve stroke

2 | AI148986474384en-010602 © Danfoss | 2021.11