FOR DIRECT BURIALPre-insulated piping system for CENTRALIZED DISTRICT HEATING
PRE-INSULATED VALVE
DN - Nominal diameter (mm)
d - Steel pipe outside diameter (mm)
D - Casing PE pipe outside diameter (mm)
D1 - Casing PE pipe outside diameter (mm)
d2 – Stem diameter (mm)
D2 - Casing PE pipe outside diameter (mm)
H – Height (mm)
Other sizes – on request.
|
DN |
d |
D |
D1 | d2 | D2 | H |
|
mm |
mm |
mm |
mm |
mm |
mm |
|
|
25 |
33.7 |
90 |
110 |
33.7 |
90 |
400 |
|
32 |
42.4 |
110 |
125 |
33.7 |
90 |
400 |
|
40 |
48.3 |
110 |
140 |
33.7 |
90 |
420 |
|
50 |
60.3 |
125 |
160 |
33.7 |
90 |
420 |
|
65 |
76.1 |
140 |
200 |
33.7 |
90 |
430 |
|
80 |
88.9 |
160 |
225 |
33.7 |
90 |
430 |
|
100 |
114.3 |
200 |
250 |
42.4 |
110 |
450 |
|
125 |
139.7 |
225 |
250 |
42.4 |
110 |
480 |
|
150 |
168.3 |
250 |
315 |
42.4 |
110 |
500 |
Raw materials
Steel ball valve with parameters according:
ЕN 1983 – Steel ball valves
ISO 7121 – Steel ball valves with common industrial application
With weld ends
Work temperature: from -30 ºС to +200 ºС
Work pressure: from 25 bar to 40 bar depending on the size
HDPE Casing pipe
Otside casing pipe is manufactured from high-density polyethilene with added antioxidants, UV stabilizers and carbon black.
Internal surface of PE pipes is processed with Corona treatment in order to achieve better adhesion with PUR foam.
Polyurethane system
AVKO jsc is using polyurethane system with foaming agent cyclopentane. The resulting PUR foam is characterized with very low heat conductivity coefficient < 0,027 W/mK.