Icma 891 | Single pipe valve with thermostatic option

The 891 thermostatic valve can be used on systems with single-pipe ring type radiators.
The valve is designed for coupling with thermostatic controls to perform automatic temperature
regulation.
The valve can only be installed via the lower radiator connection, which is used both as an inlet
and as a fluid outlet.

In single-pipe systems, the radiators are connected in series, with respect to each manifold derivation. However,
the 891 series valve, set up for this type of system, sends only 50% of the flow (30% with thermostatic control) to
the radiator, while the remaining part of fluid is bypassed and routed to the next radiator. In this way the radiators
can be intercepted individually (for exclusion or maintenance), allowing the functioning of the radiators installed
further downstream and in addition the temperature can be regulated automatically with the use of thermostatic or
electrothermal controls.

Working fluids: water and
glycol solutions
Max glycol percentage: 30%
Max working pressure: 10 bar
Max differential pressure: 1bar
Max working temperature: 100°C
Flow to radiator: 38%

Body: Brass CW617N UNI EN 12165
Headwork: Brass CW617N UNI EN 12164
Spring and
command rod: Stainless steel
Hydraulic gasket: EPDM perox
Handle: White ABS