Globe valves ZB

Shut-off valves type ZB are fast closing globe valves for use with gas detectors (gas detection systems).

They are opened only manually and closed with an electric impulse (12 V DC) or manually with a button. Both the opened and closed positions do not require power supply.

Activation of the valves – i.e. immediate cut-off of gas supply to a device or installation – results from electric impulse from the gas detection system upon gas concentration exceeding the preset threshold..

Area of application

• in gas installation safety systems: in gas boiler rooms, residential buildings, etc;
• in low-pressure gas installations;
• may additionally serve as a manual shut-off cock.

Features

• both opened and closed positions do not require power supply – they are energy efficient (an electrical pulse of 12 V DC with a duration of only < 1 s is needed to close the valve);
• insensitive to system supply voltage loss – its absence or momentary disappearance does not cause changes in gas flow through the valve;
• resistant to any disturbances that may cause the valve to open accidentally when closed (only conscious action by supervisors);
• low force required to open the valve;
• simple, cost-effective, reliable and lightweight design;
• equipped with a mesh filter which guarantees long life;
• maximum operating pressure 25 kPa (0.25 bar);
• meets the requirements of PN-EN161.