Supply proof hydrant button II giant devaluation Shanghai amount. Supply the fire explosion proof equipment, the amount of a giant explosion-proof fire hydrant button, the supply fire explosion-proof equipment, the amount a giant explosion-proof hydrant button, the supply fire explosion-proof equipment, the amount of a giant explosion-proof fire hydrant button BAL-4-I I - proof hydrant button (referred to as button) non-coding switch type button, suitable for installation in explosive gas atmospheres containing II C-class T6 temperature classification places when manually confirm the fire after the accident, press this button to start the fire pump control system, can also be sent to the fire alarm control pump activation request signal. This product is supporting the use of fire alarm controller and any manufacturers at home and abroad. This product meets the GB3836-2000 standard requirements. The button to the shell structure of two types: Ⅰ and type Ⅱ. I structure dedicated keys reset, to meet the requirements of the latest GB II-type structure with the manual reset, simple and convenient. Technical parameters 1, Ex-mark Exd Ⅱ CT6 2, Working voltage DC24V 3, contact capacity A A passive normally open contact: 0.5A 4, B, B passive normally open contacts: 7A (relay output) protection class IP65 or unprotected, the use of ambient temperature: -20 ℃ to +60 ℃ 7, relative humidity: ≤ 95% non-condensing 8, Atmospheric pressure: 80kPa to 110kPa 9 weight type Ⅰ: 1kg Ⅱ type: 1.1kg into line diameter M22 × 1.5 (the line number and size of the caliber can be designed and manufactured according to the needs of users? mounting dimensions: 116mm 10 weight?? amount: 0.9 Kg Line caliber 2-M22 × 1.5 (the number of the line caliber and size can be designed and manufactured according to the needs of users)