Back Burning Protection; Rotary Lock Valve - Viessmann KOB PYROTEC Technical Manual

Design information
(cont.)
10,19 mm
A-A
13,51 mm
< 1500
A

6.20 Back burning protection

Rotary lock valve

Rotary lock valve for fire protected separation of combustion system
and fuel store with overpressure or underpressure, and with simulta-
neous material transportation for installation in a drop section. The
rotary valve is made entirely from steel and is permissible as a fire
protection between the combustion system and woodchip silos in
wood processing operations with overpressure or underpressure. The
drive device is a spur geared motor with sprung torque support. If the
woodchips are extremely coarse, briefly running the system in reverse
avoids jamming.
Fire protection: RSE according to TRVB and VKF
Max. permissible overpressure in the fuel store: + 500 Pa
Max. permissible underpressure in the fuel store: ± 0 Pa
Standard delivery:
■ Rotary lock valve according to order data
■ Control of spur geared motor for both rotational directions according
to boiler control unit
Positioning:
■ Directly above the supply screw conveyor
■ Exception for funnel discharge: directly at the casing
PYROTEC
1,54 mm
350 1300 200
A
Note
Rotary lock valve 190 for supply system D 120 mm
Rotary lock valve 260 for supply system D 150 mm and D 190 mm
27,93 mm
c
14,00 mm
7,86 mm
d
7,86 mm
e
f
79
6