31100 (31000, 31200) series 31100 (31000, 31200) Butterfly valve of carbon steel
PN 25 DN 80 - 800
Butterfly valve 31100 series is used in industrial pipelines for demanding on-off and regulating tasks as well as in district heating.
It is tight to both directions of flow.
Nominal pressure
25 bar
| Closing pressure difference |
| CS 20 bar DN 80 - 350 |
| TS 25 bar DN 80 - 350 |
| CS 16 bar DN 400 - 800 |
| TS 16 bar DN 400 - 600 |
| Face-to-face length according to ISO 5752: |
| EN 558-1 series 20 DIN 3202 K1, or |
| EN 558-1 Series 25 DIN3202 K2, or |
| EN 558-1 Series 16 DIN3202 K3 |
Connection
Between flanges EN1092-1 Type 11 Facing Type B, PN25, PN16, PN10, ANSI CLASS 150
Temperature and tightness class
AISI 316
max +260°C/ min -40°C ISO5208, EN 12266-1 RATE B
PTFE+C
max +180°C/ min -40°C ISO5208, EN 12266-1 RATE A
The max pressure difference depends on the working temperature
Design
This wafer type butterfly valve is installed between flanges. The body material is cast carbon steel. Double eccentric disc and shaft are stainless steel. The shaft packing box is a combination of graphite rings and O-rings which are possible to tighten while in pipeline and are also replaceable.
The butterfly valve is delivered with bare shaft, handlever, manual gear, electric, pneumatic or hydraulic actuator according to customer's needs.
Conform with the requirements of the Council Directive 97/23/EC on Pressure Equipement, marking: CE 0575 Class: Gas, group 1
|
More detailed information see Product card |
