Burkert diaphragm valve 677679*

Burkert Diaphragm Valve Diaphragm 677679* Burkert Diaphragm Valve Agent Diaphragm DN40 PTFE/EPDM packed. Introduction to Burkert Diaphragm Valve: The Burkert pneumatic diaphragm valve is a special type of shut-off valve, which appeared in the 1920s.

Its opening and closing element is a diaphragm made of soft material, separating the valve body cavity from the valve cover cavity and the drive components, hence the name Burkert pneumatic diaphragm valve.

A key feature of the Burkert pneumatic diaphragm valve is that the diaphragm separates the lower valve body cavity from the upper valve cover cavity, protecting the valve stem, valve disc, and other parts located above the diaphragm from media corrosion, eliminating the need for a packing seal structure, and.

preventing media leakage.

Structural Features of the German Burkert pneumatic diaphragm valve: The structural feature of the German Burkert pneumatic diaphragm valve is that a set of thin, hemispherical metal films are clamped within the valve body, acting as a barrier between the valve stem and the fluid.

The Burkert valve closes by pressing the valve disc against the valve seat through the valve stem head and a metal diaphragm. Opening is achieved via an internal spring; as the valve stem rises and disengages from the diaphragm, the valve disc rises.

Because the Burkert valve's stroke equals the diaphragm's stroke, its characteristic lift is much smaller than that of ordinary valves. To overcome the resistance loss caused by the low lift, the valve seat and flow area are larger than in ordinary valves, aiming for a greater flow rate.

Due to the larger valve seat, the force required is much greater than in typical valves to achieve sufficient sealing force on the valve disc, as there is no direct contact between the valve stem and the valve disc.

The valve disc does not move away from the valve seat through the valve stem; therefore, this type of valve is suitable for unidirectional flow with differential pressure, and the medium typically originates "below the valve seat." However, excessive backflow should be avoided during use to prevent affecting valve closure.

Generally, metal Burkert diaphragm valves are economical and effective for high temperature and high pressure applications. valves can also be used in low temperature and low pressure applications where synthetic rubber Burkert diaphragm valves are undesirable.

The diaphragm separates the lower valve body cavity from the upper valve cover cavity, protecting the valve stem, valve disc, and other components above the diaphragm from media corrosion. This eliminates the need for a packing seal and prevents media leakage.

• Diaphragms made of soft sealing materials such as rubber or plastic offer good sealing performance. Since the diaphragm is a consumable part, it should be replaced periodically depending on the characteristics of the media.
• Due to limitations in diaphragm material, diaphragm valves are suitable for low pressure and relatively low temperature applications.
• Burkert diaphragm valves can be classified into six types according to their structure: roof type, direct flow type, stop type, straight-through type, gate type, and right-angle type;
• the connection type is usually flange connection;
• Burkert diaphragm valves can be classified into three types according to their actuation method: manual, electric, and pneumatic. high pressure. Burkert pneumatic diaphragm valves (677679* Burkert diaphragm valve agent). Introduction to Burkert diaphragm valves (pneumatic and manual): Manually or pneumatically operated Burkert diaphragm valves are specifically designed for hygienic and aseptic processes in the pharmaceutical industry. This Burkert valve is ideal for fluid control and on/off tasks. The Burkert diaphragm provides both body and seat seals. There is no internal path to the external environment, making this Burkert valve suitable for aseptic processes. When the Burkert valve is closed, the pressure pad supporting the Burkert diaphragm moves towards the sealing surface on the valve body. As the pressure plate moves, the diaphragm bends and is forced center towards the seat area in the of the valve body, thus closing the fluid path to the valve body. pneumatically, or controlled by a controller and solenoid valve. Burkert Diaphragm Valve Technical Specifications ◎ Size: 1"-4", DN25-DN100 ◎ Pressure: 10 bar (145 PSI) ◎ Material: ASTM 316L, 1.4404, 1.4435 NB2 Fe＜0.5% ◎ Temperature: -20℃ +150℃ (EPDM) -4℉ +302℉ (+140℃ (SIP,30) 284℉) ◎ Connections: Clamp, Weld, Thread, 3A BPE DIN SMS IDF ISO ◎ Burkert Diaphragm Valve Body Structure: Straight-through, Tee, U-tee, Burkert Tank Bottom Valve, Multi-channel Burkert Diaphragm Valve ◎ Burkert Diaphragm Material: EPDM+PTFE (Double Layer)/EPDM/Silicon/FPM (Vitong) ◎ Certifications: 3A-54-02/1580, PED 97/23 EC, FDA177.260

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