Bladder Tanks are the main component in a balanced pressure proportioning bladder tank system, which require no outside power source other than an adequate water supply. The Bladder Tank is a carbon steel pressure vessel with an internal reinforced neoprene rubber bladder resistant to the corrosion of the water and of the foaming agent with which it is in contact. Bladder Tanks are available in both vertical and horizontal versions in multiple sizes and with foam inside or outside the membrane. The Foam Bladder Tank serves as a pre-mixing system through a very simple mechanism: the water coming from the water network pressurizes the tank, pushing the foam concentrate contained in it to a mixer of venturi type. Here, the foam concentrate is in contact with the water, forming the foam mixture that will be channeled to the pipe of the distribution network. A foam bladder tank may have variable dimensions and consequently different capacities of containment of foam concentrate. It’s able to work even with relatively low pressures and ensures minimum pressure losses. Furthermore, the proportioner applied to it can be calibrated according to the delivery system, and the percentage of foam concentrate aspirated remains unchanged compared to the flow.The bladder tank is installed in fixed plants where a high foam protection is required. Synthetic,protein, Alcohol Foam foam compound may be employed.
A monitor is a device with directional control which leads the flow of water, foam or powder to the outlet at different rates and amounts, depending on the dimension of the monitor. Monitors may be mounted on mobile or fixed supports, both on the round or at a certain elevation. They may oscillate automatically, or maybe handled by an operator or by means or electric motor or oil hydraulic motor. All monitors can be equipped with a suitable water/foam branch pipes or nozzles or powder branch pipes.
According to the material with which the Monitors are made, they are divided into:
– Casting Monitors: Monitors made in Bronze or Anti-corrosion Light Alloy.
– Welded monitors: Monitors made in Carbon Steel or 304/316 Stainless Steel
This 2-Way, single chamber hydraulic relay pilot valve is a hydraulically
operated, diaphragm actuated control valve that either opens fully
or shuts off in response to pressure applied to its control chamber.
This 3-Way, single chamber accelerator is hydraulically
operated, diaphragm actuated pilot valve that in response to
pressure applied to its control chamber, directs flow and
pressure between its ports:
■ When pressure is applied to its control chamber,
it connects port “0” to “2”.
■ When pressure is released from its control chamber,
it connects port “2” to “1”.
This pilot can be used to either relay and accelerate
a signal (N.O.), or to reverse and accelerate a signal (N.C.).
When an orifice plate assembly is used as an integral part
of a flow control valve control circuit, it provides the differential
pressure (∆P) to power the flow control pilot. The opening and
closing of the pilot causes the flow control valve to throttle
Total head loss across the valve is reduced by locating sensing
ports close to the orifice plate, to sense downstream pressure
before it recovers.
The orifice plate internal diameter is calculated and machined
according to valve size and required flow limitation
This is a direct acting valve, actuated by a pressure responsive diaphragm, which tends to reach equilibrium with the set spring force. Fully balanced trim ensures high accuracy and stability. When used in a pressure reducing circuit, the pilot modulates closed as downstream pressure rises above set point.
This is a direct acting valve, actuated by a pressure responsive diaphragm, which tends to reach equilibrium with the set spring force. When used in a pressure relief/sustaining circuit, the pilot modulates open as upstream pressure rises above set point.
The BERMAD model FP-3PB-0 is a direct acting, spring loaded, diaphragm type relief valve. The single port is held closed by the force of the adjustable spring located above the pressure sensing diaphragm. When the force of the pressure sensed under the diaphragm exceeds the force of the spring the valve will open to relieve pressure and will close tight
when pressure falls below the pre-set value. This FM approved valve is well suited for use in protecting wet pipe Systems, pilot lines and Fusible sprinkler lines from overpressure occurring from temperature fluctuations, pump startup spikes and other.
The BERMAD Alarm Trim Valve Assembly includes a 3-Way ball valve with a position plate. This valve enables fire alarm testing on BERMAD deluge valves without actuating the deluge valve. There are 3 positions for this valve. The function of each position is indicated on a Stainless steel plate located opposite of the valve handle.
STAND BY – Directs the deluge valve downstream port to the alarm. In this position the alarm will sound when the deluge valve is actuated and water will flow from the downstream deluge valve port to the alarm sensor / motor alarm, initiating the alarm.
STOP – Closes the passage from the downstream port. In this position
the alarm will not sound regardless of whether the deluge valve is open
ALARM TEST – Directs the deluge upstream port to the alarm. This position is used to test the working condition of the alarm without having to actuate the deluge valve. Water will flow from the upstream deluge valve port to the alarm sensor / motor alarm.
After testing the handle must be returned to the STAND BY position.
The Priming Restriction is a flow restriction component used as an integral orifice in the control trim of BERMAD Deluge Valves.
In addition it incorporates two ¼” NPT (F) ports to enable a priming pressure connection to supplementary instruments like a solenoid or relay valve.
The internal restriction orifice is available in a number of diameters, each suited to a particular valve/pilot size.
This 3-Way, double chambered accelerator is a hydraulically operated, diaphragm actuated pilot that, in response to command pressure applied to either the upper or lower control chamber, directs flow and pressure between its ports.
- When forces in the upper control chamber are greater, it connects port “C” to “A.”
- When forces in the lower control chamber are greater, it connects port “A” to “0.”
This pilot can be used to either relay and accelerate a signal (N.O.), or to reverse and accelerate a signal (N.C.). as a double chambered pilot, it is suitable even when line pressure is very low