📌Alarm Valve Main Drain Test คืออะไร ? … 🎥จาก VDO ที่เห็นนี้คือ “Main Drain” ที่อยู่ในชุด Alarm Valve (วาล์วสัญญาณของระบบสปริงเกลอร์) กำลังเปิดระบายเพื่อทดสอบ … ▶️Alarm Valve Main Drain Test คืออะไร .. คือการ เปิดวาล์วระบายหลัก (Main Drain Valve) ที่ชุด Alarm Valve/ชุดควบคุมชั้น (Riser/Floor Control) เพื่อดูว่า • แหล่งจ่ายน้ำยัง “มาได้เต็ม” ไหม (ตรวจสภาพ Water Supply)  • วาล์วควบคุมน้ำหลัก “เปิดจริง” ไม่ได้เผลอปิด/ปิดไม่สุด (Control Valve Open)  • ค่าแรงดันก่อน-ระหว่างไหล (Static/Residual Pr
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📌Alarm Valve Main Drain Test คืออะไร ? … 🎥จาก VDO ที่เห็นนี…
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