Balance Pressure Foam Proportioning System Foam Pump Skid
Balance Pressure Foam Proportioning System Foam Pump For Skid Fire
Fighting
Introduction
The balance foam proportioning system is designed to supply
proportionable foam solution for foam system. A foam pump acquires
foam concentrate into proportioner from a foam storage tank. It is
especially applicable to petrochemical enterprises, oil depots,
wharfs and drilling platforms. The system mainly consists of
atmospheric foam tank, foam pump, dynamic unit, balance valve, foam
proportioner, control valves and control system.
Principle
When a fire happens, water pump and foam pump will be started. The
pressure of water and foam solution will be sensed by balance
valve, balance valve will adjust its opening degree to reach
dynamic equilibrium. Foam solution and pressurized water will be
mixed in foam proportioner to achieve foam solution. If the
pressure and flow from water inlet is unstable, balance valve will
adjust the amount of foam concentrate into proporitoner to reach
dynamic equilibrium. By this way the system get accurate mixing
ratio. Atmospheric foam tank can be feed even when the system is
under operating, which prolongs the working time.
Category
The system can be divided into motor driven, hydraulic turbine
driven, diesel driven or the combination driven of above power
according to power source of foam pump.
Hydraulic Turbine Drive
The hydraulic turbine driven balance foam proportioning system
relies on a hydraulic turbine to drive the foam pump. Hydraulic
turbine requires no electrical power—operating solely by the
pressure of the inlet water supply.
Motor Driven
Motor driven balance foam proportioning system drives foam pump
with a electric motor. There are two motors available in this
system. If the duty pump is broken, the standby pump will replace
it to make sure the system can operate normally.
Combination Drive of Diesel & Motor
The combination of diesel and motor driven balance foam
proportioning system has two power source to drive foam pump. To
drive foam pump with a diesel is a reliable way. The system can
keep working even when there is power failure. Usually diesel drive
foam pump proportioning system will combine with motor driven.
Parameters
| Model | Size of Proportioner (mm) | Working Pressure Range (MPa) | Flow Range (L/S) | Mixing Ratio |
| PHP3/24 | DN65 | 0.6~1.2
or
0.6~1.6 | 6~24 | 3%~3.9%
or
6%~7% |
| PHP6/24 |
| PHP3/42 | DN100 | 18~42 |
| PHP6/42 |
| PHP3/72 | 18~72 |
| PHP6/72 |
| PHP3/100 | DN150 | 24~100 |
| PHP6/100 |
| PHP3/120 | 24~120 |
| PHP6/120 |
| PHP3/160 | 24~160 |
| PHP6/160 |
| PHP3/200 | DN200 | 48~200 |
| PHP6/200 |
| PHP3/260 | 48~260 |
| PHP6/260 |
| PHP3/300 | DN250 | 75~300 |
| PHP6/300 |
| PHP3/400 | 75~400 |
| PHP6/400 |
Maintenance
1. Maintenance and manage staff should know the principle,
performance and operating of the equipment.
2. To make sure the equipment keep a good standby state, the
equipment should be maintained and checked regularly and keep a
checking record.
3. The equipment should operate at least once a year. Check the
valves, pipes and accessories to make sure they are intact.
4. Check the appearance of pressure gauge, valves, pipes and
accessories every quarter to make sure they are intact.
5. Check the main valves regularly (at least once a month), check
the open and close of those valves.
6. Wash the pipes with fresh water every time after using. Repair
the paint and do trust prevention
when necessary.
7. Do sampling inspection for foam concentrate in storage tank as
per warranty from foam concentrate supplier.
8. Change the foam concentrate regularly. Wash the tank and pipes
and refill foam concentrate.
Notes
1. There are dedicated lugs on foam storage tank for transportation
and installation. Do not use the pipes or other accessories as lugs
to avoid accessory units shift or leakage.
2. Check the pipes and flanges to make sure if they are tight
before operation. Check if the valves are closed.
3. Read the product instruction carefully before operating and
operate as the instruction.
4. Fill the tank with concentrate as designed volume when the
equipment come into use.
5. Contact with our company immediately if the equipment was found
any abnormal conditions during using and maintenance.
