Deluge sprinkler, Antifire universal water-foam spray nozzle (UVPN)

Purpose and scope

Antifire universal water-foam spray nozzle (UVPN) certified for compliance with GOST R 51043-2002 “Automatic water and foam fire extinguishing installations. Sprinklers. General technical requirements. Test methods”, is a deluge sprinkler and a device for producing continuous or sprayed jets of water or low expansion foam with a normalized index of uniformity of discharge in a wide pressure range.

The Antifire UVPN is used to eliminate fires with surface or volume-surface methods. The volume-surface method is realized if the entire protected space is in the area covered by the torches of extinguishing agent created by the water-foam nozzles.

The Antifire UVPN creates increased resistance to heat fluxes and wind loads during the application of water jets or low-expansion foam due to the high rate of expiration of the extinguishing agent.

The Antifire I (II) UVPN are manufactured with three types of connections:

• with flanges or, on request, on GM type fire connection heads;
• with a rotary device of the PU-A type;
• with a rotary device of the PU-B type.
• with an oscillator, a device that enables, due to the takeoff of the water flow energy, to turn the nozzles left/right into sectors with an angle of 30°, 60°, 90°, 120° (optional).

The Antifire deluge sprinklers in foam fire extinguishing installations are designed to operate with film-forming foam concentrates such as AFFF, AFFF/AR, AFFF/AR-LV, as well as S/AR according to GOST R 50588. We recommend using the Aquafom NSV foam concentrates to produce low-, medium- and high-expansion foam.

As the Antifire UVPN does not contain combustible and fusible materials (except for sealing cuffs on the oscillator rotary device), it maintains operability when exposed to heat up to 800 °C during the inertia time necessary for applying fire extinguishing agents to the combustion zone with foam fire extinguishing and water cooling installations.

Scope of application

Antifire-I is a special universal deluge sprayer designed for fire protection of various objects (production buildings, workshops where the use of sprinklers or general-purpose drenchers is not practical; technological sites, whatnots associated with the use of flammable and combustible liquids; technological sites of berthing complexes, helipads, aircraft hangars and much more). Antifire-I can be used not only for fire extinguishing, but also for water cooling of various objects (horizontal storage tanks for LPG under pressure, isothermal tanks, etc.). The possibility of their installation not on the ceiling, but along the walls, makes the use of the UVFN Antifire more efficient and convenient.

Antifire-II is a special purpose universal deluge sprinkler, which is recommended for fire protection of railway and road fill racks, tank trucks with flammable and combustible liquids, various technological tanks, etc., when it is necessary to direct a part of the jet directly to the neck, hatch, location of the most dangerous site, equipment, etc. In addition, this modification of the sprinkler is recommended if there is a need for a greater range when applying a torch-like jet.

Distinctive advantages

Antifire universal water foam nozzles are available in two versions:

• Antifire-I provides a continuous or sprayed jet of water (low-expansion foam) with a uniform distribution of liquid or foam along the cone of the torch with a spray angle of up to 120º;
• Antifire-II provides a continuous or sprayed jet of water (low-expansion foam) in the form of a filled cone with an angle of up to 120º, in which part of extinguishing agents is applied through an integrated low-expansion foam generator, where a central continuous stream of water or low-expansion foam is formed.

The universal Antifire water-foam jet nozzle is equipped on request with a control valve, which enables providing high-quality water or foam jets with a pressure upstream of the nozzle below the nominal value, as well as avoiding an exceeding nominal pressure upstream of the nozzle due to increased flow rate (self-regulation function - SR).

• normalized discharge uniformity
• resistance to temperature influences;
• availability of an integrated fine filter.
• automatic flow control depending on the power of the extinguishing agent supply source with the formation of sprayed water jets or low-expansion high quality foam (if there is a self-regulation function);
• the possibility of using an oscillator;
• the possibility of applying for fire protection of railway and truck loading racks and other objects due to the formation of a separate jet in the central part of the torch, directed to the zone of the neck of the tanks for transportation of flammable and combustible liquids.

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Universal Antifire water-foam nozzles are available in two versions:

• «Antifire-I provides a continuous or sprayed jet of water (low-expansion foam) with a uniform distribution of liquid or foam along the cone of the torch with a spray angle of up to 120º;
• Antifire-II provides a continuous or sprayed jet of water (low-expansion foam) in the form of a filled cone with an angle of up to 120º, in which part of the extinguishing agents is applied through an integrated low-expansion foam generator, where a central continuous stream of water or low-pressure foam is formed.

The universal antifire water-foam jet nozzle is equipped on request with a control valve, which enables providing high-quality water or foam jets with a pressure upstream of the nozzle below the nominal value, as well as avoiding an exceeding nominal pressure upstream of the nozzle due to increased flow rate (the self-regulation function is abbreviated as SR).

Materials of manufacture

In terms of resistance to climatic influences, the UVPN "Antifayer" corresponds to the versions U, XL, UHL, T, OM according to GOST 15150-69. The ambient temperature range is from minus 60 °C to plus 50 °C.

The material of manufacture of the UVPN Antifayer water nozzle in these climatic versions, as well as for use on seawater, is stainless steel.

UVPN "Antifayer" with nominal flow rates of 5 l/c and 10 l/c in the modification on the rotary device PU-B with an oscillator are made entirely of stainless steel

Main technical characteristics

Indicator name	Indicator value
	"Антифайер"-I(II)/5	"Антифайер"-I(II)/10	"Антифайер"-I(II)/15	"Антифайер"-I(II)/20
Nominal pressure, MPa (*) (****)	0.6
Operating pressure range, MPa (****)	0.4–1.0
Flow rate, l/s, at nominal pressure, not less than	5	10	15	20
Performance factor K ,not less than	0.63	1.27	1.93	2.55
Foam multiplicity, not less than (**)	5–8
The indicator of uniformity of irrigation according to GOST R 51043-2002 (Irrigation uniformity coefficient R) (***)	Not more than 0.5
Maintaining working capacity under thermal exposure, at least °C	800
Weight, kg, max
on the flange connection	8	10	12	12
on the PO	10	10	15	15
on PU-B	12	12	18	18
on OCC	16	18	33	33
Service life, years, at least	10

Notes:
- (*) Universal Antifayer water nozzles with nominal pressure can be made on request. 0,4, 0,5, 0,7, 0,8, 0,9, 1,0 MPa.
- (**) The multiplicity is indicated when using a film-forming foaming agent of the HCV type. It is allowed to use film-forming foaming agents that provide low-density foam of at least 15 according to GOST R 50588.
- (***) The indicator of uniformity of irrigation according to GOST R 51043-2002 is established for type I UVPN.
- (****) When manufacturing the UVPN with an oscillating device, it is necessary to take into account a pressure loss of 0.1 MPa, that is, the pressure before the UVPN must be taken 0.1 MPa higher.

The main elements

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On request

Antifires UVPN are universal special deluge sprinklers provided for equipping fire extinguishing systems and water cooling, taking into account the provision of standard fire extinguishing intensities (water cooling) and design features of protected areas. Installation of water-foam nozzles on the pipelines of fire extinguishing and water cooling systems is carried out with a preliminary installation of the torch angle and the position of the discharge map controller.

When designing the discharge maps (see above), they should be adopted in the following order:

• depending on the design and space-planning decisions of the protected zone, determine the height of the nozzle, the angle of inclination and the most appropriate angle of the jet;
• в зависимости от конструктивных и объёмно-планировочных решений защищаемой зоны определить высоту установки насадка, угол наклона и наиболее целесообразный угол факела струи;
• depending on the selected head, flow rate, spray angle and installation location of the nozzle, determine discharge maps and apply them to the plan of the protected zone. If it is necessary to shorten the range, reduce the angle of inclination to the surface to be protected (it is recommended to consult with specialists of the Pozhneftehim Group);
• if it is necessary to maximize the coverage of the protected area, provide equipment of the Antifire UVPN with oscillators;
• determine the optimal placement of the Antifire UVPN taking into account the received discharge maps.

Notes

• It is not always necessary to ensure coverage of the protected area with discharge maps. Mind that low-expansion foam can spread over the surface of a burning oil or oil product.
• To protect the Antifire universal special deluge sprinklers from ingress of foreign mechanical impurities and impairing its operability at the inlet, it is necessary to install the Tauer universal fire filter (PFU) TU 4854-012-72410778-07 with a cell size of 2x2 mm.