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 Model Number |
BALEM 431 / 65A~250A |
Special Features
- Operates hydraulically independent from any external power sources and controls
high and low levels in a storage tank by utilizing the line static and dynamic
pressure
- The incorporation of a control shaft in the valve bonnet allows the rate
of flow through the valve to be set a pre-determined flow and also acts as
a mechanical shut off feature.
- Closing speed of the valve can be controlled by an integral needle valve
on the valve bonnet
- The valve is easy to maintain and install due to its simple design
Balem 431 is a float operated hydraulic liquid level control valve suitable
for tanks and reservoirs. Its working principal is controling flow with a modulating
float pilot valve, alternatively a Balem 511 can be adjusted up to 1.2m on/off
differential. The body is coated by epoxy to prevent contamination of the liquid,
and has excellent thermal resistance. The valve is extremely easy to maintain
as no special tools or skills are required.
Specifications
| BALEM431 |
|
Model No.
|
431-065-00
|
431-080-00
|
431-100-00
|
431-125-00
|
431-150-00
|
431-200-00
|
431-250-00
|
|
A
|
G
|
A
|
G
|
A
|
G
|
A
|
G
|
A
|
G
|
A
|
G
|
A
|
G
|
|
Size
|
65A(21/2")
|
80A(3")
|
100A(4")
|
125A(5")
|
150A(6")
|
200A(8")
|
250A(10")
|
| Weight |
16kg
|
18kg
|
22kg
|
26kg
|
27kg
|
29kg
|
48kg
|
52kg
|
67kg
|
72kg
|
110kg
|
125kg
|
187kg
|
216kg
|
|
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
|
Female threaded KSPT 1/2(Optional : NPT)
|
Female threaded KSPT 3/4(Optional : NPT)
|
Dimensions
(mm)
|
Size
|
Model No.
|
D1
|
D2
|
T
|
H1
|
H2
|
H3
|
L1
|
L2
|
L3
|
L4
|
ØD
|
Øhxn
|
|
Angle
type
|
Globe
type
|
|
65A
|
431-065-1A
|
431-065-1G
|
175
|
173
|
18
|
95
|
156
|
166
|
120
|
208
|
250
|
125
|
140
|
19x4
|
|
80A
|
431-080-1A
|
431-080-1G
|
185
|
194
|
18
|
115
|
164
|
186
|
130
|
229
|
270
|
135
|
160
|
19x8
|
|
100A
|
431-100-1A
|
431-100-1G
|
210
|
213
|
18
|
125
|
187
|
211
|
140
|
249
|
290
|
145
|
175
|
19x8
|
|
125A
|
431-125-1A
|
431-125-1G
|
250
|
257
|
20
|
150
|
227
|
252
|
170
|
299
|
350
|
175
|
210
|
23x8
|
|
150A
|
431-150-1A
|
431-150-1G
|
280
|
297
|
23
|
170
|
270
|
295
|
190
|
339
|
380
|
190
|
240
|
23x8
|
|
200A
|
431-200-1A
|
431-200-1G
|
330
|
375
|
25
|
205
|
344
|
382
|
235
|
423
|
480
|
240
|
290
|
23x12
|
|
250A
|
431-250-1A
|
431-250-1G
|
440
|
456
|
28
|
250
|
432
|
442
|
280
|
508
|
570
|
285
|
335
|
25x12
|
Materials
| Angle type |
Globe type |
|
Item no.
|
Descriptions
|
Materials
|
Item no.
|
Descriptions
|
Materials
|
|
Standard
|
Optional
|
Standard
|
Optional
|
|
1
|
Body
|
Ductile Iron
|
SSC13
|
12
|
Shaft Guide
|
Brass
|
STS304
|
|
2
|
Seat
|
Bronze
|
SSC46
|
13
|
Control Shaft
|
STS304
|
|
3
|
Stop Ring
|
STS304
|
14
|
Coil Spring
|
STS304
|
|
4
|
Piston Ring
|
P.T.F.E
|
15
|
Snap Ring
|
STS304
|
|
5
|
Bush
|
Bronze
|
SSC13
|
16
|
Needle & Screw
|
Brass
|
STS304
|
|
6
|
O-Ring
|
N.B.R
|
17
|
O-Ring
|
N.B.R
|
|
7
|
Bolt
|
Steel-Plated
|
STS304
|
18
|
Piston
|
Bronze
|
SSC13
|
|
8
|
Spring Washer
|
Steel-Plated
|
STS304
|
19
|
Shaft
|
STS304
|
|
9
|
Cap
|
Ductile Iron
|
STS304
|
20
|
Disc
|
Bronze
|
SSC13
|
|
10
|
Spring Washer
|
STS304
|
21
|
Strainer
|
Brass
|
|
11
|
Nut
|
STS304
|
22
|
Seal
|
N.B.R
|
Flow Chart
Standard Piping Diagram
Principle of Operation
|
Open
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 reaches to high water level just, pilot
valve will automatically close. In this point, the chamber pressure inside
of body is same with the pressure of inlet by water route through the
chamber and the liquid room of inlet, fluid flowing toward outlet will
close since disc closes valve seat as moving downward by the weight of
piston assembly and the power of spring. At this time, liquid pressure
by the area of valve seat is total power of valve closing.
|
Applications
As for Buildings. Apartments. Plants
- As a replacement for underground/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.
Patents
- Korea Patent No. : 0207682
- US Patent No. : 4830042
- Japan Utility Model No. : 2014053
Installation
- Refer to the standard piping diagram when installing the valve.
- Before installation, finish to clean pipeline.
- Only pilot valve made by Balem Co., Ltd may be fitted to this valve.
- It is recommended that a strainer be installed to prevent the valve malfunctioning
due to foreign particles entering into the system.
- An alarm receiver system should be installed in the control room for early
detection of overflow.
- If the valve is to be used on high pressure, install a pressure reducing
valve and automatic air vent valve in order to prevent water hammer and noise.
- Do not fit a butterfly valve directly to the inlet flange.
- 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)
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