GF DIASTAR Six FC Manual Instrucciones Original página 36

4.3 Information regarding jointing techniques
Each type of valve body describes a connection type:
Type 514
True union design
Type 517
Flanges
Fixation of the diaphragm valve
NOTICE
Due to temperature changes, longitudinal or lateral forces may occur if ther-
mal expansion is constrained.
• Absorb forces via respective fixed points in front or after the valve
Operation of a valve causes reactive forces which could damage the valve.
• Mount the diaphragm valve as a fixed point with the designated fastener or
reinforce the piping directly before and after the diaphragm valve with suit-
able supports
Superimposed loadings could damage the diaphragm valve
• Diaphragm valve and piping must be aligned
True Union Design
All materials with valve body type 514
1. Loosen the union nut and push them toward the designated piping end.
2. Depending on the type of piping end, connecting parts are cemented, screwed or
welded. The Georg Fischer Planning Fundamentals include addi tional information.
3. Diaphragm valve is then positioned between the connecting parts.
4. Manually tightened the union nuts.
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Type 515
Spigot ends
Type 519
Branched type