Page 10 - GEORGFISCHER - LISTINO GHISA MALLEABILE 2023 - FIDRA

Flat seat unions Symbols

Flat seat unions are supplied without gasket(s). EN ... the first column "EN" indicates the fittings
They can be dismantled (radially) and re-assembled. standardised in European Standard EN 10242:
 ... standardised
- ... not standardised
Unions with metallic sealing

ST ... these types of fittings are made of steel
Before use, seats of metallic sealing unions must (galvanised finish = electro-plated) and
be cleaned and lubricated. For potable water therefore unsuitable for potable water
applications lubrication must be done with a potable installations.
water-approved non hardening thread sealant
(e.g. thread sealing paste according to DIN 30660). p ... limited supply. Check for availability.
These items cannot be returned.

Union piece parts S/B/N/N ... black
V/G/Z/G ... galvanised
Most Georg Fischer flat seat union piece parts are Code ... Georg Fischer part number
available as «spare parts» (refer to chapter Product
Range). Index ... basis value for the price calculation
Piece parts of unions with metallic sealing, should
not be exchanged or reused. Metallic sealing union ISO/EN ... symbol to ISO 49/EN 10242
piece parts are therefore only offered after techni-
cal clarification. SP ... minimum order quantity, quantity per
The dimensions of cast on flanges respectively seats standard pack
of both, flat seat and metallic sealing union piece
parts, are not standardised, neither on European nor GP ... quantity per carton
on International level. They are subject to a works
standard, which may be revised for technical reasons. ... piece weight in kilogram
Georg Fischer does not grant warranty for pressure
tightness, if piece parts are exchanged or reused R ... taper external thread, for connections to
especially in connection with other brands and for EN 10226-1 resp. ISO 7-1 sealing on
re-use of unions with metallic sealing. the threads.

Rp ... parallel internal jointing thread for
Quality testing connections to EN 10226-1 resp.

ISO 7-1 sealing on the threads.
Georg Fischer malleable cast iron fittings are
individually tested within the framework of the G ... parallel internal fastening thread for
existing standard. The testing of pressure carrying connections to EN ISO 228-1 not
unions is carried out on their piece parts. sealing on the thread.

G ... B ... parallel external fastening thread,
Dimensions and weights tolerance class B for connections to
EN ISO 228-1 not sealing on the threads.
All dimensions, z-dimensions and other technical
data can be found in our actual technical catalogue. 374 G ... refers to the thread size G according to
The weights given in this index values list are ISO 228 of the union nut 374.
«nominal values» at the time of printing. Variations
in weight may occur for technical reasons due to the ET ... piece part
casting process.

The purpose of this publication is to inform about index
values. The data does not imply warranty of whatever
kind. Please consult our General Terms and Conditions.

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