Features and benefits of AVK needle valves
Features and benefits of AVK needle valves AVK
We offer a wide and unique range of needle valves in high quality materials. Our standard range covers DN80 to DN1600 and PN10, 16, 25 and 40. Furthermore, we offer needle valves up to DN2200 and in PN64 and PN100 on request. AVK needle valves are therefore also recommended for regulation in large diameter pipelines and at high pressures.
Needle valve with a state-of-the-art design
AVK needle valves are straight-way type control valves and are designed with a one-piece body construction and an innovative design for flow optimisation to ensure a reduced pressure loss in open valve position.
Our needle valves require very low operating torques, as the piston is always in hydraulic balance with equal force on both sides at all valve positions. This feature facilitates the operations of all actuators and significantly reduces actuator and gearbox costs.
With internal and moving parts in stainless steel, the valves have a long life time. The body is completely protected by fusion bonded epoxy coating. Also, the sealings make up a long life system and high performance seal, located in no-flow zone, and easily replaceable without disassembling the valve from the pipeline. The valves hold a special and innovative gasket for a perfect and bidirectional seat, and all gaskets are located safely in the no-flow zone. In addition, the compact piston has 4-6 replaceable bronze guides to ensure very low vibration.
• One-piece body construction
• Stainless steel or internal parts and fasteners for a long life of the valve
• All ductile iron parts coated with min. 250 µm fusion bonded epoxy
• Shaft sealing with double O-rings
• Main seal in the no-flow zone at the valve outlet
• 4-6 guide rails ensure very low vibration
• Gaskets in thermoplastic PUR for high resistance to abrasion
• Pressure balance in chamber inside for low operating torque
• Symmetric flow path with annular flow cross section in any open position
• Internal body shape is optimised to give a low head loss coefficient in fully open position
• AVK needle valves are the safe choice for regulation of water flow and pressure, not least in large diameter pipelines and at high pressures
