DCX3 diaphragm shut-off valve - Definox

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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