Accessories; Unions And Valve Kits; Insulating Shells - Grundfos ALPHA1 L Instrucciones De Instalación Y Funcionamiento

11. Accessories

11.1 Unions and valve kits

Rp
3/4 1
25-xx 529921 529922 529821 529925 529924
G 1 1/2
25-xx N 529971 529972
32-xx G 2 509921 509922
G-threads have a cylindrical form in accordance with the EN-ISO
228-1 standard. R-threads have a conical form in accordance
with the ISO 7-1 standard. In the case of a thread of size 1 1/2",
the threads are specified as G 1 1/2 or R 1 1/2. You can only
screw male G-threads (cylindrical) into female G-threads. You
can screw male R-threads (conical) into female G- or R-threads.
See fig. 26.
R
Rp
G
Fig. 26 G-threads and R-threads

11.2 Insulating shells

You can order insulating shells as an accessory. See table below.
The insulating shells enclose the entire pump housing and are
easy to fit around the pump. See fig. 27.
Pump type
ALPHA1 L (N)
Fig. 27 Fitting the insulating shells
Product numbers, unions
R
1 1/4 1 1 1/4 3/4
519805 519806 519807 519808 519809
Rc
Product number
99270706
mm
Rp
∅22 ∅28 ∅15
1 1 1/4
mm
∅18 ∅22 ∅28 ∅42
529977 529978 529979
23