Single pipe valve
Frontal knob
For copper, Pex-Al-Pex, Pex piping
Reversible flow entry
Interaxe 37,5 mm
Chromed steel probe
The manual valves 886 and 888 offer possibility
to be reversible and can be used on radiator systems
with single-pipe ring type.
The valves can be installed only through the lower
radiator connection, which is used both as fluid inlet
and outlet.
In single-pipe systems, the radiators are connected in series, with respect to each manifold derivation. However, the 886 and 888 series valves, set
up for this type of system, send only 60% of the flow 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.
Technical data
Working fluids: Water and glycol based solutions
Max percentage of glycol: 30%
Max working pressure: 10 Bar
Pressione max differenziale: 1 Bar
Max working temperature: 100°C
Max flow to radiator: 60%
Materials
Body: Brass CW617N – EN12165
Lock ring: Brass CW617N – EN 12164
Obturator: Brass CW617N – EN 12164
Rod: Brass CW617N – EN 12164
Stop ring: Bronze phosphorus
Obturator guide: Acet. CV 25%
Knob: ABS white
Screw: Steel
Cup: Brass CW617N – EN 12165
Pipe union: Brass CW617N – EN 12165
Probe assembly: Various – see ST (856-891)
Gasket: EPDM perox
1/2 x 24×1.5
