Area of application:

Connected to the public water main of municipalities, hydrants are used primarily for firefighting. They can also be used to obtain water supplies as well as to drain off water or bleed air.

Installation:

Its connection to the public water system is made possible through the intermediary of a cast iron double-flanged bend (DN80 QN fitting). It is advisable to install a suitable wedge gate valve in front of fire hydrants supplied from the water main pipe. The hydrant key and outlet are safely hidden in a surface box below ground level.

Options:

                                 Name                                                                   Product nr 

• UNDERGROUND HYDRANT CAST CAP                               M21-80-00A 1 m

• UNDERGROUND HYDRANT CAST CAP                               M21-80-00A 1.25 m

• UNDERGROUND HYDRANT CAST CAP                               M21-80-00A 1.5 m

• UNDERGROUND HYDRANT TECHNICAL RUBBER CAP     M21-80-00A 1 m

• UNDERGROUND HYDRANT TECHNICAL RUBBER CAP     M21-80-00A 1.25 m

• UNDERGROUND HYDRANT TECHNICAL RUBBER CAP     M21-80-00A 1.5 m

Connections:

Joining flange dimensions: in conformity with EN 1092:2000, DN 80-PN 16; and DN 100-PN 16. Water outlet – diameter: 80mm – connection: special trapezoidal thread, Tr 105x6d2, (MSZ 9772)

Operation:

With a square, 27 mm wrench (MSZ 9771/3), turning counter-clockwise: open position, turning clockwise: close position. An internal shut-off valve system prevents water hammers during the opening or closing operations. DN 80 flow capacity is only reached when positioned fully opened. The hydrant is equipped with an automatic drain system. The special drain holes allow any water left inside the hydrant case to drain away into the bed of gravel to be created when installing the hydrant. Since it is protected from frosting in winter, it does not require any thawing-out. The drainage period is 2 to 4.5 minutes, depending on the tightness of the soil and the gravel. WARNING: the drain holes are closed only when the hydrant is in full open position!

Hydraulic characteristics

Complies with standard MSZ EN 14339: DN 80: Kv = 85.6 on 1×65 mm outlet If the pressure difference between the input and output is more than 1 bar, the values above shall be understood in m3/h.

Material of the main parts:

Cast iron (EN-GJL-200 MSZ EN 1560:2000): hydrant box, valve box, valve body, cap, cover, key, retainer plate, wing nut housing, iron connection. Brass: spindle, threaded bush. Red brass CDA 836: outlet. Rubber: seals, ring sealing. Plastic: valve bush, flanged bush, end plate.

Withdrawal of water:

Through a stand pipe fitted to the nozzle and suitable to be connected to a fire hose socket (MSZ 9772).

Instructions for maintenance:

As part of the mandatory maintenance specified by the National Fire Safety Regulations, during the operational test, water tightness and complete draining have to be checked. After removing the lid, the entire inside structure of the fire hydrant can be taken out in one piece without having to excavate the column pipe.

Finish:

Components protected by an epoxy-based multilayer weatherproof coating system according to the requirements of the National Fire Safety Regulations. The surface of inside castings are treated with bicomponent epoxy coating, tested and certified by the National Public Health and Medical Officer Service.

Note:

• We offer mould pattern production, as well as hand-casting, and satisfy client demands irrespective of how small quantities or unique products they require.

• In case you are looking for a unique item, we can help you with planning, with preparing patterns and the production itself.