AIR RELIEF VALVES NETWORK PROTECTION

AIR RELIEF VALVES NETWORK PROTECTION Problems caused by the presence of air in networks may be solved by fitting suitable equipment. BELGICAST can supply a wide range of devices with the highest quality to allow you to prevent faults in your system and optimize its performance. Use this catalogue to choose the most suitable products to regulate the entry and escape of air from networks and protect them from problems such as: • Head losses • Pressure variations 2 • Water hammer • Pipe breakages

BV-05-60 Triple function air valve NP - 50/200 NP - 16/25 Double air valve, providing three functions: - High flow rate air discharge capacity for pipe-filling operation, - High flow rate air inlet for pipe drainage operation and in case of pipe burst, - Continuous evacuation of air under normal working conditions (small orifice function). APPLICATIONS • Drinking water networks • Fire protection networks • Irrigation networks TESTS • Manufacturing fully tested according to ISO 5208-2. DESCRIPTION • Design: - Ductile iron design. - Patented reversible floating disc for closing under water or air...

AIR RELIEF VALVES - NETWORK PROTECTION 6 Disc outside O-ring 1 7 Disc inside O-ring 1 Stell S235-JR coated with EPDM controller color

Operation DESCRIPTION “Vannair” double orifice air valves are built according to an original compact design, with or without isolating valve. They are made of two floats mechanically free, operating in a single chamber body, aerodynamically shaped. One float is a ball fully covered with elastomer, the other is a disc in which are inserted two O-rings in a concentric way. Movements of the floats are guided in up and down direction. The floating ball ensures the shut-off of the small orifice, whereas the floating disc ensures the shut-off of the bonnet large orifices. These large orifices have...

Installation of the Vannair on a pressurized pipeline Pump control valve Check valve • a At each main high point to guarantee a fast filling of the pipelines. The advised filling speed is 0.5 m/s. • b At regular intervals along the pipeline, at least every kilometre, to avoid entrapping of air pockets while filling up. • c Before or after every isolating valve, depending on the slope of the pipeline, to avoid the negative pressurising of the pipe after closing the isolating valves. Note: It is recommended to mount single orifice air valves (BV-05-61) at each geometrical high point, when sudden-descending...

BV-05-61 Single orifice air valve for elimination of air pockets in pipelines DN - 40/50/60/65/80 PN - 16/25/40 DESCRIPTION Isolating 1/4 turn ball valve included, with 17 x 17 lockable square cap. Built-in operation controller. Ductile iron construction. Powder epoxy and cataphoresis coating. Stainless steel bolts. Minimum pressure: 0.1 bar. In conformity with EN 1074 - 4 standard. APPLICATIONS • Drinking water networks, • Fire protection networks, • Irrigation networks. TESTS • Fully tested manufacturing according to standard ISO 5208-2. TECHNICAL DATA • Range: - Type 102, PN 16 and 25: DN...

Ductile iron When there is no air, the force of water on the float, assisted by the internal pressure, closes the evacuation orifice. If an air pockets fills the air valve, the weight of the float exceeds the effect of the internal pressure and the float moves downwards to open the orifice. When water comes, the assembly closes. The built-stopcock allows the device to be isolated for checking and maintenance. Open position Free operation In order to avoid untimely operations, this type of square cap allows to lock the isolating valve in open or closed position. Just remove the square cap, and...

BV-05-62 DJET Anti-water hammer relief valve for clean waters ND - 50/65/100/150/200 NP - 16/25 The BELGICAST BV-05-62 relief valve protects installations against excess pressures and water hammer. It immediately expels excess water as the pressure comes within a preset range, damping the impact of water hammer on the network and preventing pipe breakage or other adverse consequences. • Strong construction enables it to work with high pressures. • Complete anti-corrosion epoxy coating (RAL 5015). • Very low inertia and rapid response to excess pressures. • Fitted with a pressure gauge to control...

FLOW/PRESSURE DISCHARGE CAPACITIES Example: For a sealing pressure of 8 bar, a BV-05-62 relief valve of DN-150 is capable of discharging a maximum flow of 240 I/s with an excess pressure of 2 bar. ANTI-WATER HAMMER RELIEF VALVE FIG-BV-05-62 DIAGRAM FOR BELGICAST BV-05-62 DJET RELIEF VALVE

BS-05-60 Double orifice air relief valve for sewage ND - 100 NP - 10 FEATURES • Strongly built, with body and cover of ductile cast iron. • Fully protected against corrosion by internal and external epoxy coating (RAL 5015). • Fitted with connection and valve for cleaning. • Large through channel section. • Mechanical elements kept away from contact with water. • Special design avoids stagnated materials or deposits of foreign bodies. • Weight: 44 Kg. • Maximum permissible flow Q=200 l/s. • Maximum permissible pressure: 4 bar (test pressure 25 bar). • Flange connection ND-100, NP-10. The BELGICAST...

BS-05-61 Single orifice air relief valve for sewage ND - 100 NP - 10 FEATURES • Strongly built, with body and cover of ductile cast iron. • Fully protected against corrosion by internal and external epoxy coating (RAL 5015). • Fitted with connection and valve for cleaning. • Large through channel section. • Mechanical elements kept away from contact with water. • Special design avoids stagnated materials or deposits of foreign bodies. • Weight: 42 Kg. • Maximum permissible pressure: 4 bar (test pressure 25 bar). • Flange connection ND-100, NP-10. OPERATION The BELGICAST BS-05-61 air relief valve...