DN15 - DN100 Thread BSPT Pneumatic Operated Ball Valve Stainless Steel CF8M

Specifications

A Pneumatic actuator mainly consists of a piston or a diaphragm which develops the motive power. It keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm or piston to move the valve stem or rotate the valve control element.

Valves require little pressure to operate and usually double or triple the input force. The larger the size of the piston, the larger the output pressure can be. Having a larger piston can also be good if air supply is low, allowing the same forces with less input. These pressures are large enough to crush objects in the pipe. On 100 kPa input, you could lift a small car (upwards of 1,000 lbs) easily, and this is only a basic, small pneumatic valve. However, the resulting forces required of the stem would be too great and cause the valve stem to fail.

This pressure is transferred to the valve stem, which is connected to either the valve plug (see plug valve), butterfly valve etc. Larger forces are required in high pressure or high flow pipelines to allow the valve to overcome these forces, and allow it to move the valves moving parts to control the material flowing inside.

The valves input is the "control signal." This can come from a variety of measuring devices, and each different pressure is a different set point for a valve. A typical standard signal is 20–100 kPa. For example, a valve could be controlling the pressure in a vessel which has a constant out-flow, and a varied in-flow (varied by the actuator and valve). A pressure transmitter will monitor the pressure in the vessel and transmit a signal from 20–100 kPa. 20 kPa means there is no pressure, 100 kPa means there is full range pressure (can be varied by the transmitters calibration points). As the pressure rises in the vessel, the output of the transmitter rises, this increase in pressure is sent to the valve, which causes the valve to stroke downward, and start closing the valve, decreasing flow into the vessel, reducing the pressure in the vessel as excess pressure is evacuated through the out flow. This is called a direct acting process.

Advantage

1. Stainless steel ball valve

2. High flow values

3. High medium pressures

4. Long service life

5. ISO 5211 piston valve

Technical Data
Single Acting Pneumatic Actuator Ordering No.

Accessories which can use with this Ball Valve
On/off Indicator
Namur Standard Solenoid Valve in all Standard
Pneumatic & Electric-Pneumatic Valve Positioner
Declutchable Manual Override
Limit Switches for On/Off Indication at Panel Board
Filter + Regulator Combination with Pressure Gauge

Applications

Pneumatic ball valves are widely used for flow isolation and control in pneumatic actuation systems because these air operated valves are available in a range of body styles and sizes, materials and pressure ratings and they are suitable for most applications ranging from water, gases, steam, oils, foodstuffs, chemicals, pharmaceuticals and powders. An actuated ball valve has an internal ball with a hole through it sealed typically with PTFE seats compressed against it by the ball valve ends, driven through a quarter turn by a stem operated by the air actuator. Air operated ball valves offer a robust, rugged and reliable actuated valve package at a relatively low cost, and offer fast working times, can be operated continuously, and are comfortable in high cycling applications where appropriate.

Model Selection
3PC Thread Pneumatic Ball Valve

Beijing Silk Road Enterprise Management Services Co.,LTD. is a professional manufacturer of Trunnion Mounted Ball Valve, Pneumatic Actuated Ball Valve, Flange End Ball Valve and Soft Seated Ball Valve.