R554D

Self-sealing connection

Description
Intermediate group for manifolds, in brass, with self-sealing.
Provided with: automatic air vent valve (R88), drain tap (R608), thermometer
(R540), terminal plug (R592D).
Suitable for heating and cooling systems, with water and glycol solutions

Operation
The operation of the automatic air vent valve is is based on the principle of the floating of bodies immersed in a fluid. When there is no air accumulation into the valve body, the float is in raised position and through the mechanism, it keeps the obturator under closing.
The lowering of the floating level caused by the air accumulation into the valve body, involves the obturator opening and the consequent discharge
that persists up to the reintroduction of the initial conditions. At the system load, as there is no water into the valve body, the float is completely down
permitting to the air to flow quickly. The air discharge is prevented by screwing the lateral plug.
In normal operation conditions, the plug shall be unscrewed.

Technical data
• Temperature range: 5÷110 °C
• Maximum working pressure: 10 bar
• Maximum pressure of air vent operation: 7 bar (R88)
• Terminal plug: 1”M (R592D)
• Plug: 1/2”M (R92)
• Thermometer: 3/8”, Ø 40 m, range 0÷80 °C (R540)
• Drain tap: 1/2”, with hose connection (R608)

Materials
• Body, plugs and drain tap: UNI EN 12165 CW617N brass
• Gaskets: EPDM
• Body (R88): ottone UNI EN 12165 CW617N
• O-Ring (R88): EPDM
• Shutter spring (R88): inox
• Internal float (R88): PP-H