Dry-barrel hydrants fire-fighting system ka ek important hissa hote hain, jo extreme weather conditions mein bhi efficient water supply ensure karte hain. Yeh hydrants khas kar un areas mein install kiye jaate hain jahan temperature freezing level tak pahunch sakta hai. Inka design aisa hota hai ki hydrant ke upar koi pani nahi rehta, balki system ke andar water supply ground ke neeche control hota hai.
Ab sawaal yeh uthta hai ki main valve dry-barrel hydrant mein kahan hota hai? Is hydrant ka sabse essential component iska main valve hota hai, jo ground level ke neeche, usually frost line se neeche locate hota hai. Frost line us gehraayi ko kehte hain jahan tak sardiyon mein mitti jam sakti hai. Kyunki agar valve ground ke upar hota, to thand ke samay pani freeze ho jata aur hydrant jam ho sakta tha. Isi wajah se iska main valve hydrant ke base par, ground ke neeche, ek specially designed valve box ya chamber mein hota hai.
Jab hydrant ko use karne ki zaroorat hoti hai, to iski operating nut ko ghuma kar main valve open kiya jata hai. Jaise hi valve open hota hai, underground water supply line se pani hydrant ke barrel mein aata hai aur wahan se hose pipe ya nozzle ke through fire fighting ya kisi aur emergency purpose ke liye istemal hota hai. Jab hydrant band kiya jata hai, to main valve automatically close ho jata hai aur barrel ke andar jo bhi bacha-kucha pani hota hai, wo ek drain hole ke through nikal jata hai. Yeh mechanism is baat ko ensure karta hai ki hydrant ke andar pani na atke aur wo freeze na ho.
Is system ka ek aur faida yeh hai ki agar hydrant kisi wajah se damage ho jaye ya tod diya jaye, to bhi pani continuously nahi behne lagta, kyunki main valve neeche ground ke andar hota hai aur direct water supply ko control karta hai. Yeh feature hydrant ke durability aur efficiency ko badhata hai.
Agar kabhi kisi dry-barrel hydrant ka maintenance ya repair karna ho, to main valve tak pahunchne ke liye uske base tak excavation karni padti hai. Is wajah se hydrant ka regular inspection aur maintenance bahut zaroori hota hai, taki kisi bhi emergency ke waqt yeh system smoothly kaam kare aur kisi bhi unexpected problem ka samna na karna pade.
