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0847EN July 2020

ValVes and components for radiators

RadiatoRs valves with theRmostatic option

vtl seRies

R401VTL

R402VTL

R415VTL

Versions and product codes

Series

Product code

Connections

Valve type

R401VTL

R401LX033

1/2”

Iron pipe

Angle

R402VTL

R402LX033

1/2”

Iron pipe

Straight

R415VTL

R415LX033

1/2”

Iron pipe

Reverse angle

Description

The VTL series valves with thermostatic option are indicated in the radiator

systems where it is expected the installation of thermostatic heads to control

the room temperature in order to optimize the consumption.

When the special worksite protection handwheel is fully closed, it is possible

to exceed static pressure values of 10 bar with the system disabled.

In any case, it is advised to connect the heating elements before carrying out

the pressurised seal tests on the system.

Installation of thermostatic heads

The R469H thermostatic head with M30 x 1,5 mm threaded connection are installed directly on the valve body after removing the worksite protection handwheel.

To remove the handwheel it is necessary to counterclockwise unscrew the upper cap and then release the handwheel by levering the base using a screwdriver.

The worksite protection handwheel, however, allows the valve flow rate to be partialize: by turning it anticlockwise, the valve opens; turning it clockwise the

valve closes.

Warning.

With thermostatic head installed on the valve body, to avoid excessive loads on the seal gasket of the

thermostatic bonnet (with the resulting risk of jamming and locking) during the summer months, is is

recommended to place the knob in the fully open position, as marked by the symbol .

In case of malfunction of the bonnet it is possible to replace the stem O-Ring, by unscrewing the nut using an

hexagonal wrench 11 mm.

If the problem persists is also possible to replace the complete bonnet using the appropriate key R400.

R400

Nut

Stem

Spring

Gasket

O-Ring

Body

BONNET

Materials

• Body and main components: UNI EN 12165 CW617N chrome plated brass

• Monobloc command stem: stainless steel

• Worksite protection handwheel: PP-H

• Gaskets: EPDM

Valve size

Thermostatic head in combination

Nominal flow rate q

mNH in combination

with thermostatic head [kg/h]

Authority“a” of the stopper

1/2”

(R401LX033, R415LX033)

R469H

150

0,86

1/2”

(R402LX033)

160

0,84

Technical data

• Fluid of use: water and glycol solutions (max. 30 %)

• Temperature range: 5÷110 °C

• Max. working pressure: 16 bar with worksite protection handwheel

10 bar in combination with thermostatic head

• Max. differential pressure with thermostatic head: 1,4 bar (1/2”);

• Can be combined with thermostatic heads R469H (threaded ring nut M30 x 1,5 mm)

KEYMARK (EN215) certification

Product

code

Declared

hysteresis

C

H

Influence of the

declared water

temperature

W

H

Declared

response time

Z

H

Influence of

the declared

differential

pressure“D

H”

Control

accuracy

CA

H

Complies with Directive RT2012

Certità con variation temporelle

TELL

Factor VT

Value VT

H

Energy efficiency

class

Classification

R469HX001

0,03 K

0,3 K

25 min.

0,15 K

0,2 K

0,15

0,2

0,25