Pneumatic control units. SeleJet Pneumatic on/off and control valves

Transcription

1 SeleJet Pneumatic on/off and control valves NEW

2 SeleJet NEW Quick fit nozzle holders for individual nozzle shut-off with flow-stop Four-way or two-way nozzle holders with individual pneumatic nozzle shut-off. Diaphragm valve closes by spring load, pneumatic pressure opens the valve (min. 4 bar). Max. pneumatic working pressure 8 bar, pneumatic connection G 1/8" female. Connection fittings on request. SeleJet 4 Four-way pneumatic nozzle holders P a r t n o. D F A Bar M S E 20 mm 10 SB 8 KS incl E 1/2" 10 SB 8 KS incl A5E 22 mm 10 SB 8 KS incl E 3/4" 10 SB 8 KS incl A5E 25 mm 10 SB 8 KS incl E 1" 10 SB 8 KS incl. SeleJet 2 Two-way pneumatic nozzle holders P a r t n o. D F A Bar M S E 20 mm 10 SB 8 KS incl E 1/2" 10 SB 8 KS incl A5E 22 mm 10 SB 8 KS incl E 3/4" 10 SB 8 KS incl A5E 25 mm 10 SB 8 KS incl E 1" 10 SB 8 KS incl. D F A = pipe outside diameter = diameter = outlet thread SB = standard bayonet Bar = max. pressure (bar) M S = material KS = plastic = screw Pneumatic valves for nozzle holders Allows individual control of each nozzle. Boom sections can be divided independently from liquid supply or end nozzles can be operated individually. Pneumatic shut off valve in plastic, for nozzle holder with diaphragm check valve, mounted in place of the diaphragm check valve. Connection to air supply (max. 8 bar) by female thread G 1/8", valve opens with pressure and closes automatically by spring load. Part no Pneumatic valve for nozzle holders, opens with air pressure, Viton diaphragm Part no Pneumatic valve for nozzle holders, opens with air pressure, EPDM diaphragm 92

3 Pneumatic on/off and control valves Advantages of pneumatic valves: Easy installation simple and secure operation Short response time Rugged design Light weight Interface to computerized spray control systems available Section valves Pneumatic section valves to switch off individual boom sections. Due to the light weight and the small dimensions of the valves, they can be installed not only at the sprayer central control unit, but also directly on the boom sections, reducing the length of the hoses. Max. flow rate 40 l/min at 20 bar pressure Liquid inlet: male thread G 3/4"; Liquid outlet: female thread G 1/2" Compressed air: female thread G 1/8" Part no Pneumatic section valve Main valves Functional description: A spring in the cylinder holds the valve open. By air pressure on the piston the valve plate is pushed against the inlet valve seat and the valve shuts off immediately. If the pressure is switched off, the spring pushes back the piston and the valve plate, opening the valve instantly. Pneumatic control valves for large liquid volumes and for central control of liquid flow, e.g. main boom valve and other high flow applications such as injector pumping, tank mixing and liquid transfer. see table below Main valves P a r t n o. connections * liquid working pneumatic working max. flow type ** mode *** G " pressure (bar) pressure (bar) l/min /4 a x 1 i E open /4 a x 1 1/4 i E open a x 1 a D closed /2 a x 1 1/2 a D closed a x 2 a D closed * i = female thread a = male thread ** E = angled valve, inlet front, outlet sideways D = gate valve, inlet and outlet alternating *** open = valve open without pressure, closed by pneumatic pressure closed = valve closed by spring load, pneumatic pressure opens valve 93

4 Pressure control valve The pneumatic pressure control valve allows pressure changes in very short time. This is important in combination with automatic control units for flow rate/ pressure adaptation to variations in application speed. A delay in the response time of the pressure control valve may lead to incorrect application of the chemical. The pneumatic pressure control valves allow infinite adjustment of the valve response time. Unlike spring loaded pressure control valves, the air pressure buffers pressure changes due to cut-off or switch-on of boom sections, maintaining the desired pressure. Max. flow rate 250 l/min at 12 bar pressure Inlet: male thread G 1 1/4"; Outlet: male thread G 1 1/2" Compressed air: female thread G 1/8" Part no Pneumatic pressure control valve Functional description: The adjusted air pressure pushes the piston, on the air side, against the control cone, on the liquid side. The liquid and air pressures are balanced. Increasing the air pressure compels the liquid pressure to rise, the control cone is pushed downwards, reducing the cross section. However, when only the flow rate of the spray liquid is changed, e.g., when cutting off a boom section, the control cone is pushed upwards, increasing the cross section, but the liquid pressure does not change if the air pressure stays the same. As the diameter of the piston is larger than that of the valve plate, less air pressure is required to hold against the liquid pressure. The response time of the valve can be infinitely adjusted using an air flow regulator. Mounting arrangement Pneumatic section valve installed for flushing filter Pneumatic section valve on a spray boom 94

5 Accessories Pneumatic control units 12 V air compressor unit with 10 l air storage tank, primed, pressure switch, thermal protection, pressure gauge, on/off switch in rugged body, power cable, ready to use mounted on a frame with carrying handle, max. working pressure 8 bar. Part no Air compressor 12 V, max. 30 l/min aspiration power, 8 bar max. output pressure, oil and maintenance free use, rugged design, consumption max. 18 A, thermal protection switch, short connection cable, without power and safety switches. Part no Compressed air storage tank 10 l, max. 10 bar, steel, primed Part no Kit with mounting brackets and threads for fixing air storage tank Part no Pressure switch for air compressor, on at 5,6 bar, off at 8 bar, connecting thread G 1/4", switch capacity max. 2 A at 12 V Part no Important note: Part no to operate the air compressor an additional relay tolerating min. 18 A power input is required. Protection cap for pressure switch Plug-in fittings for pneumatic hoses 6 mm external, noncorrosive, made from polyacetal and stainless steel Part no. 005F01PM0306E Part no. 005F01PM0206E Part no. 005F01PM010611E angular plug T-plug straight plug with thread G 1/8" on one side Other pneumatic fittings and pneumatic hoses on request. 95