▶ Special Feature 

● Operates both electrically and mechanically
● Easy to install, transport, and maintenance
● An integral speed control valve enables the speed of closing to be
    set on site to suit conditions
● It is safe to use at high temperature and pressure due to its piston
    working principle
● The valves have an indefinite life span

   Balem 441 is a float hydraulic liquid level control valve for use in reservoirs. It is a solenoid operated hydraulic control valve. In case if power failure, it can be overridden mechanically by installing a pilot valve. It is suitable for and safe at high pressure flow as it’s opening and closing is both by solenoid and mechanical pilot valve. It’s corrosion resistance and thermal resistance is excellent, and it will not contaminate the line fluid.

▶ Specifications 

Model No.

441-250-00

G

Size

80A(3")

100A(4")

200A(8")

250A(10")

Weight

Operating Pressure

0.05~0.98 MPa(0.5~10kgf/㎠)

Test Pressure

1.72MPa(17.5kgf/㎠)

Media

Water, Oil (Order-Made)

Temperature : 0°C ~ 80°C

Pilot Valve

▶ Dimensions 

80A

441-080-1A

441-080-1G

185

194

16

115

223

130

229

270

135

160

19 x 8

▶ Materials 

▶ Flow Chart

▶ Standard Piping Diagram

▶ Principle of Operation

◆ OPEN
   When the water level in reservoir becomes low, solenoid valve opens by the electronic signal of beginning of water supply and the chamber connecting with solenoid valve inside of body becomes in the condition of atmospheric pressure. Because the power in the same pressure is directly proportion to the width and the lower part of piston is wider than the upper part of disc, piston moves to upward by the water pressure and disc assembled to piston opens and fluid can flow toward outlet. If it is impossible to control electrically due to electricity off or breakdown of solenoid vlave, transfer to the operation of mechanical pilot valve by opening manual selector screw. At this time Bescon valve opens by the opening of mechanic pilot valve when the water level becomes low.When the water level in reservoir becomes low, the chamber inside of body becomes in the condition of atmospheric pressure as opening pilot valve, piston moves to upward by the water pressure because the lower area of piston is larger than upper side of disc and disc assembled to piston opens at the same time and fluid can flow toward outlet. 

◆ CLOSE
   When the water level in reservoir becomes high, solenoid valve closes by the electric signal of high water level and the chamber pressure becomes same with the inlet pressure by flow way through the chamber and liquid room of inlet, fluid flowing toward outlet will close since disc closes valve seat as moving downward by the weight of piston assembly, the power of spring and all the powers to piston assembly. When solenoid valve doesn't close due to the error of solenoid, mechanic pilot valve closes secondarily pilot line and so Bescon valve closes safely.

▶ Applications

 ● As for Buildings. Apartments. Plants
    - Substitute for under ground/ roof top, low water level tanks ball type float control valve.
    - Substitute for high and low levels control mechanical valves and electrodes.
    - Various types of oil tank float control valves.

▶ Patents

   - Korea Patent No. 0207682

▶ Installation

1. Refer to the standard piping diagram when installing the valve.
2. Before installation, finish to clean pipeline.
3. Only pilot valve made by Balem Co., Ltd may be fitted to this valve.
4. It is recommended that a strainer be installed to prevent the valve malfunctioning due to foreign     particles entering into the system.
5. An alarm receiver system should be installed in the control room for early detection of overflow.
6. Install a pressure reducing valve and automatic air vent valve in order to prevent water hammer and     noise when used on high dynamic pressure.
7. Do not fit a butterfly valve on the inlet flange.
8. The water level sensor must be placed as following order ;
    - Low water level(pump start)
    - High water level(pump stop)
    - Warning water level(alarm control fail)
    - Emergency stop(closing pilot valve)