AVKO

PRE-INSULATED PIPE SYSTEMS FOR DISTRICT HEATING NETWORKS


FOR DIRECT BURIAL
Pre-insulated piping system for CENTRALIZED DISTRICT HEATING

PRE-INSULATED VALVE WITH TWO DRAINS/VENTS

 PRE-INSULATED VALVE

 

Този кранов възел може да бъде изпълнен и само с един дренаж (обезвъздушител).

 DN - Nominal diameter (mm)

d - Steel pipe outside diameter (mm)

D - Casing PE pipe outside diameter (mm)

d1 – Stem diameter (mm)

D1 - Casing PE pipe outside diameter (mm)

D2 - Casing PE pipe outside diameter (mm)

H – Height    (mm)

This valve can also be manufactured with just one drain/vent.

Other sizes – on request.

 

DN

d

D

d1 D1 D2

mm

mm

mm

mm

mm

40

48.3

110

26,9

90

140

50

60.3

125

42,4

110

160

65

76.1

140

42,4

110

200

80

88.9

160

42,4

110

225

100

114.3

200

42,4

110

250

125

139.7

225

42,4

110

250

150

168.3

250

42,4

110

315

 

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.