DCX3 diaphragm shut-off valve are used in a wide variety of process and ancillary fluid applications, designed for efficient cleaning. The aseptic bearing shut-off valve is fitted with a fluid (cleaning/rinsing) or vapor circulation bearing. This configuration allows for sterilizing the valve components in contact with the exterior before encountering the fluid process when handling the valve.

DCX3 diaphragm shut-off valve – Definox

Features

• Same features as standard DCX3 (floating seal, thick body, etc.)
• Fitted: with PTFE (PolyTetraFluorEthylene) diaphragm to ensure a physical barrier between the inside of the valve and the outside environment, and with microvalve to warn of a leak or possible seal damage
• The stroke on these valves is slightly shorter than on a standard DCX valve

The DCX3 aseptic bearing changeover valve is fitted with a fluid (cleaning/rinsing) or vapour circulation bearing.– Dimensions: SMS – DIN – US; from DN25 (1″) to DN150 (6″)– When closing the valve, the plug stem in contact with the medium is sterilised before penetrating inside the valve.– Possibility of fitting the valve with a cooling bearing.– Deformable PTFE diaphragm

• Surface are of diaphragm equivalent to that of the plug, helping to balance the pressure
• Alcohol barrier, optional.

 

Technical Advantages DCX3 diaphragm shut-off valve

Materials

• Half body: stainless steel 1.4404/316L
• Disc: stainless steel 1.4404/316L
• Seal: EPDM – fluorinated elastomer (FKM) or silicon
• Operating devices: stainless steel 1.4301/304

Service conditions

• Max. temperature: +140^oC/+284^oF (temperature depending on seal type)
• Min. temperature: +1^oC/+33,8^oF
• Max. working pressure: 8 bar (800 kPa)/116 psi
• Actuator air supply pressure: min. 5.5 bar (550 kPa) /80 psi; max. 8 bar (800 kPa)/116 psi
• Vacuum resistance: 0.4 cm³/s

Replacing pfa seals DCX3 diaphragm shut-off valve

To change PFA seals, follow the guidelines given below:• Remove the defective seal using a cutter taking care not to mark the bearing surface of the plug (protect the stainless steel surface using the edge of a steel rule or a plastic off-cut),• Place the new seals in an oven at 140°C (+/- 3%) for 30 minutes. Do not exceed 200 °C. If the temperature is too low, there is a risk that the seal will deform or tear during installation.

Application of DCX3 diaphragm shut-off valve

With the above outstanding advantages, defines valves are very popular with investors in many fields such as:– Food, pharmaceutical, chemical, and cosmetic industries– Animal feed processing industry,…

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