SF20-2 Two-way Zone Valve NC (normally closed) w return spring [575] - €171.04 : Profil.fi, pumps, ventilation, pipes, valves, boilers, under floor heating, hybrid solar heating, heat pumps, pumps, generators

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SF20-2 Two-way Zone Valve NC (normally closed) w return spring

Model: 575

€171.04

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SF20-2 Two-way Zone Valve NC (normally closed) with return spring

Dn20 3/4"
These valves are furnished with path A normally closed (without electrical supply, see Fig. 1), where the shut-off ball closes path A because of the elastic force exercised by the return springs. When the electrical supply is activated, the servomotor overcomes the force of the springs and moves the ball in that position until the electrical supply is interrrupted (Fig. 2). When the electrical supply is interrupted the return springs put the valve back on path A in about 4 seconds.
The version marked N.O. (NORMALLY OPEN) acts in reverse, i.e. the ball is in open position when not energizedThe version marked N.O. (NORMALLY OPEN) acts in reverse, i.e. the ball is in open position when not energized

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