Underground Fire Hydrant
Underground fire hydrants are installed underground for fire firefighting systems and are used for water opening or closing. The outlet is underground level. The operation key can be used to control the opening and closing of the valve to draw water with a fire hose. The outlet is upward to make getting water convenient. The main body material is cast iron, with brass or stainless steel outlet connector.
Judberd can offer below two types underground fire hydrant.One is integrated type, another is detachable type.
Integrated Type
Detachable Type
Integrated Underground Fire Hydrants
Feature
Various Flange Drilling Designs
Flange can be drilled according to EN1092-2 /ISO7005-2 as the left photo
Flange can be multi drilled according to EN1092-2 /ISO7005-2 which is marked in black circle and BS10 Table D/Table E which is marked in white circle as the right photo
Auto drainage hole
The copper plug designed by Judberd is essentially a small check valve. When the Underground Fire Hydrant is in operation and has internal pressure, the steel ball, under pressure, compresses the spring to block the drainage hole. When the underground fire hydrant is not in use and has no internal pressure, the steel ball, assisted by the spring, opens the drainage hole to release water from the valve body. This prevents freezing inside the valve body, avoiding damage to internal components.
Various Outlet Design
The outlet material can be brass, bronze , stainless steel etc ,the thread can be 2 1/2“ male London round outlet or customized
Drawing
Material List
1,Body Ductile Iron
2,Gate Ductile Iron/EPDM
3,Stem Nut Brass
4,Stem SS420
5,Bonnet Ductile Iron
6,Bolt Stainless Steel
7,O-ring NBR
8,Gland Ductile Iron
9,Bolt Stainless Steel
10,Cap Top Ductile Iron
11,Outlet SS304/Brass/Bronze
12,Cap Plastic
Detachable Underground Fire Hydrants
Feature
The Detachable underground fire hydrant consists of an isolation valve (isolate valve can be a gate valve, butterfly valve, ball valve or globe valve that can be used as a cut-off valve), a duck foot bend and a threaded outlet (the material of the threaded outlet can be brass, bronze , stainless steel or other materials), these three parts are connected through flanges, and each component can be disassembled and used independently.
How to Install Underground Fire Hydrant?
The height from the underground hydrant outlet to the ground should be 1.10m, and the sign should be prominently displayed.
The location sign of the outdoor fire hydrant should be clear, and the position of the hydrant outlet should be easily accessible.
Prevent falling objects above it.
The installation dimensions for outdoor fire hydrants and fire pump connectors should comply with design requirements, allowing a deviation of ±20mm in hydrant outlet installation height.
For underground fire hydrants, the distance between the top outlet and the bottom surface of the fire well cover should not exceed 400mm.
There should be sufficient operating space inside the well, along with a ladder.
In cold regions, measures should be taken to prevent freezing inside the well.
You need to assemble the inlet flange with other pipeline component flange together, and connect the fire hose to the outlet thread .There should be no leakage under pressure.
