Overview bellows seal valve seat is a single top-regulating valve guide structure, compact body structure, fluid channel S streamlined, pressure drop, flow rate, adjustable range widely. The valve cover seal structure using wave tube lines can completely eliminate the possibility of leakage of process fluid clearance from the stem outward movement, which is one notable feature bellows seal valve. Since the deformation of the bellows element itself and Zhuo aging resistance, this valve completely overcome packing filler valve normally present sensitive to aging and temperature difference weaknesses. Secondly, the use of bellows - packing a double seal structure, safety and reliability is better. Therefore, it is widely used in highly toxic, corrosive, radioactive and other rare special automatic control system media. Spool-oriented area, good vibration resistance, equipped with multi-spring diaphragm actuator, compact structure, large output force. Ordering Information Model and name 1 2 Nominal diameter DN (mm 3. nominal 4 5 Body material flow characteristics and requirements of trim materials 6. media type and temperature range 7 valve after pressure (pressure ) 8 9 matching accessories sealed form, we recommend users to install air filters FRL with two five-way solenoid valve