Pneumatic angle seat valve is a pilot angle seat valve operated by a single-acting pneumatic actuator with spring safety protection. When in use, normally open or normally closed should be selected. Pneumatic angle seat valve is widely used in short-term frequent start, with the characteristics of sensitive response and accurate action. When used with solenoid valve, the gas and liquid flow can be accurately controlled by pneumatic control. Accurate temperature control, dripping liquid and other requirements can be achieved.
Pneumatic angle seat valve is a common pipeline switch in automatic control system. It is widely used in printing and weaving, printing and dyeing, bleaching, food, washing, chemical industry, water treatment, medicine and other automatic machinery and equipment. It has no water hammer and no noise. , reliable sealing performance and so on.
Angle seat valves are 2/2-way pneumatically actuated piston valves. The piston actuator provides a linear motion to lift the seal off its seat. Because the seat is positioned under an angle, the flow is minimally impeded in the open position, resulting in an excellent flow rate and a low pressure loss. They are used to regulate the flow of liquids, gases, steam, vacuum and even aggressive fluids. They can also operate with high temperatures and high viscosity media, even under zero differential pressures.
The robust design makes angle seat valves a popular choice for harsh applications and they have very high cycle lives. Therefore, they are excellent long-life alternatives to ball valves. These valves are also suitable alternatives for solenoid valves, especially with contaminated, viscous media where typical solenoid valves would fail. They may be operated using a single acting or double acting configuration, which has an influence on its pressure rating. They can also be designed as manually operated or electrically operated.
Angle seat valves are operated pneumatically such that air pressure is used to control the piston actuator, which lifts the valve plug off its seat. Normally Closed (NC) valves usually have the valve closed in unpressurized conditions and use a spring to return the valve to the rest state.
Normally Open (NO) valves have the valve opening always open unless air pressure acts to close it. A NO valve can be obtained if the spring is placed on the opposite side of the piston actuator. Double Acting valves can be used to handle flow in both directions. These valves have no spring and depend on the supply air to determine the valve position.
These configurations influence the pressure rating of the valve. Flow up and under the valve (causing valve to open) will reduce water hammer effect but reduces the maximum working pressure of the valve by typically 50%. However, fitting a strong return spring will help increase the working pressure but a larger actuator will be required to overcome this increased spring strength. With flow over seat (causing valve to close), a full working pressure is achieved and water hammer can be reduced by restricting the compressed air supply flow.
Construction and design:
They have a robust construction similar to globe valves, but use a piston operated angle seat valve with a closure spring. The body is normally cast or die-forged in one piece. A plug is connected to the end of the piston which is seated on PTFE seats. The piston is designed to retract further from the seat, thereby providing maximum flow rate. They may be Normally Closed (NC), Normally Open (NO) or Double Acting. The piston actuator comes with threaded ports or with NAMUR ports which allows for direct mounting of NAMUR style solenoid valves.
Often, the actuator head can be rotated 360° to allow optimum position of air and electric lines in tight locations. The valve body is generally made of brass or stainless steel. Connection types include threaded, clamped or welded. Typically, a visual indicator on the top of the piston shows whether the valve is open or closed.
1.Large Flux, low Resistance, No Water-hammer Y-type Shape Enlarged The Flowing Section, which Could Raise The Flux By 30% And Make Flow More Smooth
2.Super Long Life.
3.Which Help The Stem Adjust And Lubricate Itself Automatically.
4.The Cylinder Material is Stainless Steel.Lubricating Automatically,360 Rolling Freely.
Fluid Pressure : Max×1.6MPa（232psi）
Control Fluid：Neutral gas，Air
Applicable Fluid：Water，Alcohol，Oil，Dye，Steam，Neutral gas or liquid，Organic solvent，Acid and lye
Control Type：Normally closed，Normally open，Double acting
Connection: Threaded(BSP.BSPT,NPT),Welded, Flanged, Tri-clamp
Actuator Material：CF8 (SS304)