Danfoss VFY-WG, VFY-LG Data sheet

Data sheet

Butterfly valves with gear box
VFY-WG, VFY-LG

Description

Features:

• Spline driven one piece shaft connected to
spherically machined disc allows high torque
transmission i.e. quick response and minimum
back-lash

• Long term reliability due to upper and lower
anti-friction bearings

• Safe maintenance: shaft blow out protection
with circlip

• Position indicator

Main Data:

• DN 50-350

• kVS 79-8520 m3/h

• PN 16

• EPDM Liner

• Stainless steel or Ductile iron Epoxy
Coated disc

• Medium:

- Circulation water, drinking water or chilled

glycolic water up to 50 %

• Medium Temperature:

−10 … 120 °C (EP disc)

−10 … 130 °C (SS disc)

• Wafer or Lug connection

• Approvals:

Ordering

Wafer type VFY-WG

XX

X

k

DN

50 79
65 174 06 5B7441

80 275 06 5B744 2
100 496 0 65B74 43
125 883 065B7444
150 1212 065B744 5
200 2500 06 5B744 6
250 3948 0 65B74 57
300 5635 0 65B74 58
350 8520 065B7449

50 79

65 174 065B 8421

80 275 065B8422
100 496 065B8423
125 883 065B8424
150 1212 065B8425
200 2500 065B8426
250 3948 065B8427
300 5635 065B8 428
350 8520 065B8429

VS

(m3/h)

PN

16 130 Stainless Steel

16 120

T

(°C)

max

Disc Code No.

06 5B744 0

065B8420

Ductile iron Epoxy

Coated

© Danfoss | 2020.11 AI176286477249en-010903 | 1

Data sheet VFY-WG, VFY-LG

Ordering

Lug type VFY-LG

DN XX
XX XX

XX

XX

DN

(m3/h)

50 79

k

VS

PN

T

(°C)

max

Disc Code No.

06 5B746 0

65 174 06 5B7461

80 275 065B7462
100 496 0 65B74 63
125 883 0 65B74 64
150 1212 065B7465

16 130 Stainless Steel

200 2500 065B7406
250 3948 065B7407
300 5635 0 65B74 08
350 8520 065B7469

50 79

065B8430

65 174 065B 8431

80 275 065B8432
100 496 065B8433
125 883 065B8434
150 1212 065B8435

16 120

Ductile iron Epoxy

Coated

200 2500 065B8436
250 3948 065B 8437
300 5635 065B8438
350 8520 065B8439

Spare parts

Replacement Liner VFY-W Liner

DN PN Liner Code No.

50
65 065B7583

80 065B7584
100 065B7585
125 065B7578
150 06 5B7579

16 EPDM

200 065B7592
250 065B7593
300 065B7594
350 06 5B7591

065B7582

Replacement gearbox VFY-G earbox

for DN Code No.

50/65/80/100 065B7595

125/150/200 065B7596

250 065B7598
300 065B7599
350 065 B7600

2 | AI176286477249en-010903 © Danfoss | 2020.11

Data sheet VFY-WG, VFY-LG

mounting between flanges

mounting deadline

Technical data

Typ e VF Y-WG VFY- LG

Nominal diameter DN 50-350
kVS value m3/h 79-8520
Rotation angle 90 °
Leakage rate Acc. to PED 2014/68/EU, EN 12266-1, Rate A
Nominal pressure PN 16
Medium Circulation water, Glycolyc water up to 50 % or drinking water

Medium
temperature

Connection Wafer (centering lugs) Lug (Tapped lugs)
Mounting

Material

Body

Disc Ductile iron EN GJS 400 -15 (DIN GGG 40) with Epox y coating or Stainless Steel
Shaft Stainless steel AISI 420
Liner EPDM
Circlip Steel XC 75 / Stainless steel
O-ring Nitrile/Viton
Upper guide bush Zinc coated S. + PTFE
Lower guide bush Zinc coated S. + PTFE
Gear box Aluminium

1)

No visible detec table leakage during the te sting procedure

EP disc
SS disc −10 ... 130 (see p-T diagram)

°

C

Cast iron EN GJL 250 (DIN GG25) DN 50 -300 Cast iron EN GJL 250 (DIN GG25) DN 50 -150

Ductile iron (DIN GGG40) DN 350 Ductile iron (DIN GGG40) DN 200-350

−10 ... 120 (see p-T diagram)

1)

Installation positions

Not recommendedPossiblePossibleRecommended

AI176286477249en-010903 | 3© Danfoss | 2020.11