Samson 3256, Mounting And Operating Instructions

Page: 19 / 84

EB 8065 EN 3-5
Design and principle of operation
Table 3-1: Technical data for Type 3256
Material Cast steel 1.0619 Cast steel 1.7357
Cast stainless
steel 1.4408
Valve size
1)
DN
15 to
150
200 to
300
15 to
150
200 to
300
15 to
150
200 to
300
Pressure rating
1)
PN
16 to
400
16 to
100
16 to
400
16 to
100
16 to
400
16 to
100
Type of connection
Flanges All DIN EN versions
Welding ends DIN EN 12627
Seat-plug seal Metal seal · Soft seal · High-performance metal seal
Characteristic Equal percentage · Linear · Quick opening (
u
T 8000-3)
Rangeability 50 : 1
Compliance
·
Temperature ranges in °C · Permissible operating pressures acc. to pressure-temperature diagram (see
Information Sheet
u
T 8000-2)
Body without insulating section
–10 to +220 °C · Up to +350 °C with high-temperature
packing
Body with Insulating section or bellows
seal
–10 to +400 3) –10 to +500 –196 to +550
Valve plug
2)
Standard
Metal seal –196 to +550
Soft seal –196 to +220
Balanced with PTFE ring –50 to +220
3)
Balanced with graphite ring 200 to 550
Leakage class according to IEC 60534-4
Valve plug
Standard
Metal seal Standard: IV · High-performance metal seal: V
Soft seal VI
Balanced, metal seal
With PTFE (standard): IV · High-performance metal seal: V
With graphite ring: IV
1)
DN 400 and 500 on request; up to PN 400 on request
2)
Only in combination with suitable body material
3)
Lower temperatures on request