Type RK370
Fig. 7c
4.4.3. Valve installed remote from the fire barrier acc. to diagram in Fig. 8a and 8b.
4.4.3.1. Distance from the fire barrier is marked as length “X” of ventilation duct protruding from the
wall constituting the fire barrier acc. to Fig. 8a and 8b.
4.4.3.2. Place the duct in the fire barrier in the previously prepared opening acc. to section 4.2. at the
appropriate length “X”, ensuring the designed distance of the valve from the fire barrier.
4.4.3.3. Assemble the valve with the duct so that its drive remains outside the insulation (cf. Fig. 8a
and 8b).
4.4.3.4. Install ventilation ducts to the valve on one side and to the duct in the fire barrier on the other,
suspending them at a distance not greater than 3 m from the fire barrier axis.
4.4.3.5. Such suspended duct with the valve after relevant setting in the fire barrier must be sealed
with insulation meeting the requirements of fire insulation of the barrier, e.g. conlit.
4.4.3.6. Section (X +120) mm of the duct and valve type V370 acc. to Fig. 8a, and section (X + 100)
mm of the duct and valve type RK370 acc. to Fig. 8b, must be insulated with PROMATECT L
500 boards with 52 mm thickness. At the joint of the valve with the fire barrier, at the entire
circumference, make an additional band of PROMATECT L or L 500 boards with the thickness
of 52 mm acc. to Fig. 8a or 8b. Such an insulation coating must be closed from the head with
PROMATECT L 500 board with the thickness of 30 mm. Before the frontal closure of the
insulation coating, tightly fill the gaps between the valve body and the internal circumference
of the coating with stripes of mineral wool with the cross-section 10x28 mm, and place a layer
of PROMASTOP on it.
4.4.3.7. Frontal closure of the insulation coating for valves of V370 type must be made with stripes of
PROMATECT L or L500 board with thickness of 30 mm, width 81 mm and lengths allocated
according to cross dimensions of the valve installed, so that along sides “B”, there are stripes
by 2.5 mm longer than nominal dimension, and along sides “H”, there should be stripes by 164
mm longer than nominal dimension of the side. Stripes of the board along side “B” can have
cuts of 3 mm each on both ends along dimension “B”, and 30 mm along the width of the stripe
(81mm). In turn, in the case of valve of RK370 type, as frontal closing, make a blind of
PROMATECT L or L 500 board with thickness of 30 mm in the form of square with dimensions
Dn + 176 mm with opening cut in the axis, with diameter Dn + 2.5 mm. The blind installed at
the circumference of the valve body must be sealed with PROMASTOP COATING and MG III,
and to the casing coating after prior gluing.
Bilateral sealing
of valve and wall
with fire-safety
mass e.g.
PROMASEAL-
Mastic
Mineral wool min. 100kg/m
3
Mineral wool
Steel profile of plaster w.
Plaster boards
Plaster boards around
Plaster boards around
Mineral wool
Mineral wool
P
la
st
e
r
b
o
a
rd
1
2
,5
m
m
o
v
e
rl
a
y
Fixing clamps
4 items
Screw 3.5x25mm
Valve RK370
drive
Detail Fig. 7c
