POK English catalogue (USA)

POK France - ZI Les Guignons - 10400 Nogent-sur-Seine - FRANCE Tel: +33 (0)3 25 39 84 78 - Fax: +33 (0)3 25 39 84 90 - Email: export@pok.fr - Web: www.pok.fr 174 Eductors The foam eductors operate according to the Venturi principle and use the pressure created by the water to suction out a specific quantity of foam concentrate. Most of the types of eductors are therefore assembled between the water supply and the foam equipment, according to the schematic below. The performance of the system will depend on the good use of the equipment according to requirements specific to each equipment. The inductors should be positioned such that there is about three feet of straight hose between water supply and the eductor and an other three feet of straight hose between eductor and the foam equipment. It is important to get an eductor that is adapted to the foam equipment, to take into account the pressure loss in the hoses and to forsee a pump that is powerful enough to get the right pressure at the inlet of the eductor and at the inlet of the foam equipment. The pressure loss between in and outlet of the eductor is 35 or 40%, depending on the model. The pressure loss in the hose between eductor and nozzle is function of the length of the hose and its diameter. Our range of eductors are made in aluminium alloy of first fusion and with heat treatment, red polyester coating or hard anodisation, in bronze or stainless steel, well adapted for a corrosive environment. All our eductors are equipped with couplings that conform to international norms: Pump Water supply 3.3 ft MINI. 3.3 ft MINI. 5 ft MAXI. Eductors Foam concentrate Suction pipe Foam branchpipe Norm for the BSP threads of dividing breechings Norm for the DSP couplings Norm for Storz couplings Norm for NST-NH threads C o n f o r m t o t h e n o r m (ISO R 228) NF E 03-005 C o n f o r m t o t h e n o r m DIN 14 355 C o n f o r m t o t h e n o r m NF S 61-701 C o n f o r m t o t h e n o r m NFPA 1963