Shilla Fire-Tech

It is a line proportioning type movable foam mixing device, which includes a mixer for low flow rate less than 1000LPM used by connecting a fire-fighting hose between a pump or a hydrant and the foam equipment, and a mixer for high flow rate up to 350GPM ~ 750 GPM.

Though 3% of foam ratio is standard, it is possible to attach a foam regulator for 1% or 6% for regulating the flow rate from 3% or 6% to 1% ~ 6%. It is also equipped with a device for preventing backflow of water into the foam solution.

As pressure of water reduces by 30~40% when passing through the mixer, the pump pressure should be maintained sufficiently.

It is a fixed type mixing device installed in the middle of the foam equipment pipe and is a bronze material mixer. It has a structure where it sends pressurized water through proportioning and generates pressure loss through Venturi action due to difference in flow velocity for inhaling the foam agents and mixing it with water. Though around 40% of loss may be caused due to the Venturi tube, the structure is simple, installation cost is low, and easy to use. It can be made into 1%, 3% or 6% mixer according to the type of foam discharging device. Also, it is possible to attach a regulator to adjust the rate between 1% and 6%. When the discharging rate of the foam equipment lowers than the appropriate flow rate of a mixer, it may cause backflow due to back pressure, so a valve for preventing backflow should be installed on the inhaling line.

It is a general fixed-type mixing device installed and used together with a bladder built-in foam tank which is fire-fighting equipment of petrochemical plant or storage facility.
When the foam liquid is stored in the bladder of the foam liquid storage tank and the pressurized water supplied through the inlet pipeline of the mixer is injected outside the bladder of the tank, the pressure in the tank rises and the foam liquid in the bladder flows through the pipe connected to the inhaling line of the mixer, which is mixed with water passing through the Venturi tube of the mixer to be discharged through a foam discharger. The performance is stable only when the discharging amount of the foam discharger is maintained above the minimum flow rate of the mixer. If it exceeds the maximum flow rate, the discharging performance may deteriorate due to low level of air intake of the discharger. So, it is essential to select a suitable mixer.

MODEL	SL-28S
SIZE	NH 1-1/2"
FLOW RATE @0.7MPA	200 LPM @ 7 barg
APPLICABLE	FOAM BRANCHPIPE SL-17 SERIES. SL-31-4. SL-31-3SS
OPTION	1% ~ 6% FOAM METERING DEVICE
MATERIAL	BRONZE
REMARKS

MODEL	SL-28B
SIZE	2-1/2"
FLOW RATE	400 LPM @ 7 barg
MATERIAL	BRONZE
APPICABLE	FOAM BRANCHPIPE SL-19MS, SL-31-5, SL-31-6
OPTION	1% – 6% foam metering device
REMAKRS	Includes a valve for preventing a back flow.

MODEL	SL-29
SIZE	2-1/2"
FLOW RATE	950 LPM @ 7 barg
MATERIAL	BRONZE
APPLICABLE	FOAM BRANCH PIPE SL-19M
OPTION	1% – 6% foam metering device
REMARKS	Includes a valve for preventing a back flow

LINE PROPORTIONER
Model	Size		Flow Rate	Length	Material	Remark
Model	Inlet	Outlet	(LPM @0.35MPa)	(mm)	Material	Remark
SLP-6-9	PF 1-1/2”(F)	PT 1-1/2”(M)	150 – 300	265	Bronze	Test Pressure : 20 barg Painting : RED or YELLOW
SLP-10-25	PF 2-1/2”(F)	PT 2-1/2”(M)	300 – 1000	384
SLP-30-40	PF 2-1/2”(F)	PT 3”(M)	1100 – 1500	470
SLP-45-55	PF 3”(F)	PT 4”(M)	1490 – 2080	510

PRESSURE PROPORTIONER
Model	Line Size		Flow Rate (LPM)	Material	Remark
Model	Water	Foam	Foam Ratio 3%	Bronze
SLP-65FP	2-1/2"	1"	300 ~ 1070
SLP-80FP	3"	1-1/4"	920 ~ 2340
SLP-100FP	4"	1-1/2"	1710 ~ 4550
SLP-150FP	6"	2"	600 ~ 10500
SLP-200FP	8"	2-1/2"	3215 ~ 18925

SL-28S

SL-28B

SL-29