DMN BL300 - Page 11

DMN-WESTINGHOUSE Explosion-Proof Rotary Valves
Code: RV-Ex.pro-E.B.01.D 05-2016
9
The Rotary valves are explosion proof tested according to VDI 2263 Part 3.
Certified to have a pressure shock resistance of 10 bar and flame proof ness.
Excluded are:
- Type BL enlarged inlet
- Aluminium castings
- Rotor executions with Plastic (Teflon, Polyurethane, etc), or scraper
blades
Ambient temperature
Operate rotary valves at an ambient temperature of –20°C to +40°C.
Conveying air temperature
The conveying air must not exceed a temperature of +70°C.
Surface temperature
The surface temperature of the rotary valve depends on the temperature of the
product to be handled.
The recommended maximum product temperature for the rotary valve is +150°C
depending on the type of rotary valve.
The temperature increase of the valve by failure is T=50°C.
Marked temperature if equipment is subject to type testing (EN-13463-1)
T=50°C = measured maximum surface temperature + 5 K
If rotary valve is supplied bare shaft.
Maximum surface temperature of the bare shaft Rotary valve is 120°C/T4.
(calculation: conveying air 70°C +(T=50°C) =120°C)
If the temperature of the product to be handled can is higher then 70°C than this will
influence the surface temperature of the rotary valve. (see table)
Product temperature
Max.surface temperature
70°C
120°C
T4
80°C
130°C
85°C
135°C
90°C
140°C
T3
100°C
150°C
110°C
160°C
120°C
170°C
130°C
180°C
140°C
190°C
150°C
200°C