Burkert Type 2712 - Manual (Page 8)

6 - 2712 big
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Liquid and gaseous media are suitable that do not attack the housing and seal materials.
Control medium: instrument air, Class 3 to DIN ISO 8573-1
Construction of the control valve
Media
NOTE The approved operating pressures and media temperatures are to be taken from the data
sheet or rating plate. With regard to the permissible seat leakage rate, the values specified
in DIN EN 1349 are complied with, whereby for the steel/steel seal, leakage class IV
applies, and for the PTFE/steel seal, leakage class VI applies.
2/2-way piston controlled valve with control cone and Y-housing.
Control function A
(closed by spring force in rest position)
Control function B
(open in rest position)
Actuator material: PA (polyamide)
Housing material: stainless steel 316L
Seal materials: steel/steel (1.4571) or PTFE/steel