Danfoss VHS-FN Data sheet

Datasheet

VHS-FN High Flow Valves for Two-Pipe
Parallel and Base-Connection Radiators

Application

An optional ll-and-drain tting is available.

To avoid the occurrence of scale and corrosion in
the system, the composition of the heating water
should comply with VDI guidelines 2035.

System layout

VHS-FN straight

The VHS-FN is the ideal control valve for modern
base-connection radiators, as well as for universal
or bathroom radiators with connection distances
of 50mm between ow and return. Quick and
easy to install, it will accept standard Danfoss
snap-lock sensor elements.

The VHS-FN incorporates a combined ow regula­tion and shut-o/drain device. Connection to
copper, soft steel, alupex and PEX plastic pipes
can be carried out with Danfoss clamping joints.

VHS-FN angle

To ensure an appealing nish dierent types of
valve covers are available:

In white ABS material
(RAL 9010), suitable for
wet lacquering or in
black PPO, suitable for
electrostatic powder
lacquering.

Enclosure designed
for towel dryers with
angled valves.

Ordering and data

© Danfoss HS | 09/2015 | VDTKY302

1

VHS-FN high ow valves

Connection

Type

VHS-FN 15,
angle

VHS-FN 15,
straight

Technical data

Max. water temperature 120 °C

Recommended dierential pressure 0.05-0.2 bar

Max. technical dierential pressure 0.6 bar

Testing pressure 16 bar

Max. operating pressure 10 bar

(ISO 228-1)

Radiator System ¼ ½ ¾ 1 1½ 2 3 4

R½ G¾A 0.16 0.31 0.44 0.49 0.54 0.57 0.61 0.65 0.70 013G4225

R½ G¾A 0.16 0.31 0.44 0.49 0.54 0.57 0.61 0.65 0.70 013G4226

Turns on the ow regulation screw

kv-values

1) 3)

(m3/h)

k

vs

(m3/h)

Code no.

Data sheet VHS-FN high ow valves for two-pipe systems

1)

The kv values represent the ow volume (Q) in m3/h at a pressure drop (∆p) through the valve of 1 bar. kv = Q : √∆p.

The kv-values are given for Xp = 2K.

2)

The stated maximum technical dierential pressure indicates the limit for maintaining optimum control. For low-

noise operation, system dierential pressures should be held within the recommended range. Pumps should never
be oversized; select those that generate just sucient pressure to circulate the required volume of water. From
experience, a dierential pressure of 0.05-0.2 bar across the valve is adequate in most systems. In systems where it
is too high, a Danfoss dierential pressure regulator can be used to reduce it.

3)

If sensors RAW, RAS-C, RAE or remote setting unit is used, the P-band increases by a factor of 1.6. Manufacturer’s

value is at “N” setting.

Accessories

Product Code no.

Cover* for VHS valve for panel radiators, straight pattern
White RAL 9016, suitable for wet lacquering**

Cover* for VHS valve for panel radiators, angle pattern
White RAL 9016, suitable for wet lacquering**

Cover* for VHS valve for towel rail radiators, straight pattern
White RAL 9010, suitable for wet lacquering**

Cover* for VHS valve for towel rail radiators, straight pattern
White RAL 9016, suitable for wet lacquering**

Cover* for VHS valve for towel rail radiators, angle pattern
White RAL 9010, suitable for wet lacquering**

Cover* for VHS valve for towel rail radiators, angle pattern
White RAL 9016, suitable for wet lacquering**

Cover for VHS valve, straight pattern, chrome 013G4780
Cover for VHS valve, angle pattern, chrome 013G4779
Enclosure* for VHS valve for towel rail radiators, angle pattern

White RAL 9010, suitable for wet lacquering**
Enclosure* for VHS valve for towel rail radiators, angle pattern

White RAL 9016, suitable for wet lacquering**

Sealing cone incl. seal for valve radiator with 3/4" ext. thread (20 pcs.) 003L0294

Self-sealing connection nipple for valve radiator with G½ int. thread (20 pcs.) 003L0295

Manual handwheel for all RA type valves (valve di. pressure max. 0.6 bar) 013G5002

Fill-and-drain tting, not nickel-plated, with 3/4" ext. thread and hose nozzle 003L0152

013G4774

013G4775

013G4672

013G4674

013G4671

013G4673

013G4751

013G4755

Presetting

2

© Danfoss HS | 09/2015 | VDTKY302

Connection bracket for sensors without snap-lock connection (10 pcs.) 013G4925

Metal cover for VHS valves, nickel-plated 003L0153

* Requires a sensor with snap-lock.
**Guidelines for lacquering are enclosed in the
product carton.

Presetting of ow is easily made with a 6 mm
Allen key:

1. Remove the metal cover.
Close the return by turning the Allen key
clockwise.

2. Set the ow by turning the Allen key
counter-clockwise, according to values given
in "Ordering and data" on page 1.
After setting, ret the metal cover.

VHS is suited for connection of copper, soft steel, PE-X
plastic and aluminium alloys. Connection is made with
the help of Danfoss clamping joints.

1.

2.