English (GB)
10
5.5 Accessories
5.5.1 Unions and valve kits
Note: The product numbers are always for one complete set, incl. gaskets.
* When ordering for UK 15-xx versions, use product numbers for 25-xx (G 1 1/2).
G-threads have a cylindrical form in accordance with the EN ISO
228-1 standard and are not sealing the thread. It requires a flat
gasket. You can only screw male G-threads (cylindrical) into
female G-threads. The G-threads are standard thread on the
pump housing.
R-threads are tapered external threads in accordance with the EN
10226-1 standard.
Rc- or Rp-threads are internal threads with either tapered or
cylindrical (parallel) threads. You can screw male R-threads
(conical) into female Rc- or Rp-threads. See fig.
.
Fig. 12
G-threads and R-threads
Product numbers, unions
Union nut with internal
threads
Union nut with
external
threads
Ball valve with internal
threads
Ball valve with
compression fitting
Union nut with soldering fitting
ALPHA
3
Connection
3/4
1
1 1/4
1
1 1/4
3/4
1
1 1/4
∅
22
∅
28
∅
18
∅
22
∅
28
∅
42
15-xx*
G 1
25-xx G 1 1/2 529921 529922 529821 529925 529924 519805 519806 519807 519808 519809 529977 529978 529979
32-xx
G 2
509921 509922
529995
Rp
R
Rp
mm
mm
TM
07
05
58
02
18
R
R
Rp
Rc
G
Rc
Rp
R
Rp
