Surfaces That Come Into Contact With Food Products; Valve Cross-Sections - ProMinent Sigma 1 Supplementary Operating Instructions

Tab. 3: The materials conform to Regulation (EC) no. 1935/2004.
Dosing head Valve seats / valve housing / connector piece
1.4435

8.2 Surfaces that come into contact with food products

8.3 Valve cross-sections

DN
DN10
DN15
DN25
DN32
Notes on cleaning metering pumps with hygienic pump head
1.4435
* O-rings DIN 11864 R
Surface quality:
The metallic surfaces that come into contact with food products
n
are electropolished with a roughness value (Ra) of
max. 0.8 μm.
Make sure that the surfaces that come into contact with food
n
products are not scratched or damaged.
The side of the diaphragm that comes into contact with food
n
products may not be scratched or damaged.
Do not exceed the chloride content of the batching water, see and ,
because the steel parts can then become unhygienic due to corro‐
sion.
The smallest cross-section of the dosing head with its nominal
width is derived from the cross-section of the ball check valve.
Smallest cross-section surface
80 mm 2
83 mm
2
275 mm 2
402 mm 2
O-rings * Balls Diaphragm
EPDM Al O
2 3
Equivalent diameter
8.9 mm
10.3 mm
16.6 mm
22.6 mm
PTFE
15