Burkert Type 2702 - Manual (Page 10)

10 - 2702
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ECHNICAL
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CONSTRUCTION OF THE CONTROL VALVE
2/2-way piston actuated valve with control plug and angle seat body
Control function A (closed by spring force)
Normally close
Control function B (open in rest position)
Normally open
Actuator material: PA (polyamide) or PPS
Body material: stainless steel 316L
Seal materials: steel/steel (1.4571) or PTFE/steel
MEDIA
Liquid and gaseous media that do not attack the body and seal materials.
Actuator size 80 (F) 5.5 - 10 bar
Actuator size 100 (G) 5.5 - 7 bar
Pilot pressure
Actuator size F DN 15 0 - 16 bar
Actuator size F DN 20 0 - 16 bar
Actuator size F DN 25 0 - 16 bar
Actuator size F DN 32 0 - 15 bar
Actuator size G DN 40 0 - 12,5 bar
Actuator size G DN 50 0 - 7,2 bar
Fluid pressure
NOTE The permitted operating pressure and temperature of the medium are listed on the rating
plate and in the following tables. With regard to the permissible seat leakage, the values
given in DIN EN 1349 are complied with,whereby for the steel/steel seal, leakage class IV
and for the PTFE/steel leakage class VI apply.
Control medium Quality classes according to DIN ISO 8573-1
Dust content Class 5: Max. particle size 40 µm; max. particle density 10 mg/m 3
Water content Class 3: Max. pressure dew point -20 °C or min. 10 degrees below the
lowest operating temperature
Oil content Class 5: Max. 25 mg/m 3 in conjunction with Bürkert positioners
Class 3: Max. 1 mg/m 3 in conjunction with SIDE Control Type 8635
Note: Higher demands placed on the positioner must be observed!